--- /dev/null
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core</artifactId>
+ <version>2.0.0-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>core-deployment</artifactId>
+ <name>${project.artifactId}</name>
+ <description>The Apex policy deployer</description>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.model</groupId>
+ <artifactId>policy-model</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.model</groupId>
+ <artifactId>engine-model</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core-infrastructure</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core-protocols</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ </dependencies>
+</project>
\ No newline at end of file
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.deployment;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+
+/**
+ * The Class ApexDeploymentException is an exception that may be thrown on deployment errors in Apex.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ApexDeploymentException extends ApexException {
+ private static final long serialVersionUID = 1816909564890470707L;
+
+ /**
+ * Instantiates a new apex deployment exception.
+ *
+ * @param message the message
+ */
+ public ApexDeploymentException(final String message) {
+ super(message);
+ }
+
+ /**
+ * Instantiates a new apex deployment exception.
+ *
+ * @param message the message
+ * @param e the e
+ */
+ public ApexDeploymentException(final String message, final Exception e) {
+ super(message, e);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.deployment;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class {@link BatchDeployer} deploys an Apex model held as an XML or Json file onto an Apex engine. It uses the
+ * EngDep protocol to communicate with the engine, with the EngDep protocol being carried on Java web sockets.
+ *
+ * This deployer is a simple command line deployer that reads the communication parameters and the location of the Apex
+ * model file as arguments.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class BatchDeployer {
+ private static final int NUM_ARGUMENTS = 3;
+
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(BatchDeployer.class);
+
+ // The facade that is handling messaging to the engine service
+ private EngineServiceFacade engineServiceFacade = null;
+
+ /**
+ * The main method, reads the Apex server host address, port and location of the Apex model file from the command
+ * line arguments.
+ *
+ * @param args the arguments that specify the Apex engine and the Apex model file
+ */
+ public static void main(final String[] args) {
+ if (args.length != NUM_ARGUMENTS) {
+ LOGGER.error("invalid arguments: " + Arrays.toString(args));
+ LOGGER.error("usage: Deployer <server address> <port address> <Apex Model file location>");
+ return;
+ }
+
+ BatchDeployer deployer = null;
+ try {
+ // Use a Deployer object to handle model deployment
+ deployer = new BatchDeployer(args[0], Integer.parseInt(args[1]));
+ deployer.init();
+ deployer.deployModel(args[2], false, false);
+ deployer.startEngines();
+ } catch (final ApexException | IOException e) {
+ LOGGER.error("model deployment failed on parameters {}", args, e);
+ } finally {
+ if (deployer != null) {
+ deployer.close();
+ }
+ }
+ }
+
+ /**
+ * Instantiates a new deployer.
+ *
+ * @param hostName the host name of the host running the Apex Engine
+ * @param port the port to use for EngDep communication with the Apex engine
+ */
+ public BatchDeployer(final String hostName, final int port) {
+ engineServiceFacade = new EngineServiceFacade(hostName, port);
+ }
+
+ /**
+ * Initializes the deployer, opens an EngDep communication session with the Apex engine.
+ *
+ * @throws ApexDeploymentException thrown on deployment and communication errors
+ */
+ public void init() throws ApexDeploymentException {
+ engineServiceFacade.init();
+ }
+
+ /**
+ * Close the EngDep connection to the Apex server.
+ */
+ public void close() {
+ engineServiceFacade.close();
+ }
+
+ /**
+ * Deploy an Apex model on the Apex server.
+ *
+ * @param modelFileName the name of the model file containing the model to deploy
+ * @param ignoreConflicts true if conflicts between context in polices is to be ignored
+ * @param force true if the model is to be applied even if it is incompatible with the existing model
+ * @throws ApexException on Apex errors
+ * @throws IOException on IO exceptions from the operating system
+ */
+ public void deployModel(final String modelFileName, final boolean ignoreConflicts, final boolean force)
+ throws ApexException, IOException {
+ engineServiceFacade.deployModel(modelFileName, ignoreConflicts, force);
+ }
+
+ /**
+ * Deploy an Apex model on the Apex server.
+ *
+ * @param policyModel the model to deploy
+ * @param ignoreConflicts true if conflicts between context in polices is to be ignored
+ * @param force true if the model is to be applied even if it is incompatible with the existing model
+ * @throws ApexException on Apex errors
+ * @throws IOException on IO exceptions from the operating system
+ */
+ public void deployModel(final AxPolicyModel policyModel, final boolean ignoreConflicts, final boolean force)
+ throws ApexException, IOException {
+ engineServiceFacade.deployModel(policyModel, ignoreConflicts, force);
+ }
+
+ /**
+ * Start the Apex engines on the engine service.
+ *
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void startEngines() throws ApexDeploymentException {
+ for (final AxArtifactKey engineKey : engineServiceFacade.getEngineKeyArray()) {
+ engineServiceFacade.startEngine(engineKey);
+ }
+ }
+
+ /**
+ * Stop the Apex engines on the engine service.
+ *
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void stopEngines() throws ApexDeploymentException {
+ for (final AxArtifactKey engineKey : engineServiceFacade.getEngineKeyArray()) {
+ engineServiceFacade.stopEngine(engineKey);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.deployment;
+
+import com.google.common.eventbus.Subscribe;
+
+import java.net.URI;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageHolder;
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingServiceFactory;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
+import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.onap.policy.apex.core.protocols.Message;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class DeploymentClient handles the client side of an EngDep communication session with an Apex server. It runs a
+ * thread to handle message sending and session monitoring. It uses a sending queue to queue messages for sending by the
+ * client thread and a receiving queue to queue messages received from the Apex engine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class DeploymentClient implements Runnable {
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(DeploymentClient.class);
+
+ private static final int CLIENT_STOP_WAIT_INTERVAL = 100;
+
+ // Host and port to use for EngDep messaging
+ private String host = null;
+ private int port = 0;
+
+ // Messaging service is used to transmit and receive messages over the web socket
+ private static MessagingServiceFactory<Message> factory = new MessagingServiceFactory<>();
+ private MessagingService<Message> service = null;
+
+ // Send and receive queues for message buffering
+ private final BlockingQueue<Message> sendQueue = new LinkedBlockingQueue<>();
+ private final BlockingQueue<Message> receiveQueue = new LinkedBlockingQueue<>();
+
+ // Thread management fields
+ private boolean started = false;
+ private Thread thisThread = null;
+
+ /**
+ * Instantiates a new deployment client.
+ *
+ * @param host the host name that the EngDep server is running on
+ * @param port the port the port the EngDep server is using
+ */
+ public DeploymentClient(final String host, final int port) {
+ this.host = host;
+ this.port = port;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Runnable#run()
+ */
+ @Override
+ public void run() {
+ LOGGER.debug("engine<-->deployment to \"ws://" + host + ":" + port + "\" thread starting . . .");
+
+ // Set up the thread name
+ thisThread = Thread.currentThread();
+ thisThread.setName(DeploymentClient.class.getName() + "-" + host + ":" + port);
+
+ try {
+ // Establish a connection to the Apex server for EngDep message communication over Web Sockets
+ service = factory.createClient(new URI("ws://" + host + ":" + port));
+ service.addMessageListener(new DeploymentClientListener());
+
+ service.startConnection();
+ started = true;
+ LOGGER.debug("engine<-->deployment client thread started");
+ } catch (final Exception e) {
+ LOGGER.error("engine<-->deployment client thread exception", e);
+ return;
+ }
+
+ // Loop forever, sending messages as they appear on the queue
+ while (true) {
+ try {
+ final Message messageForSending = sendQueue.take();
+ sendMessage(messageForSending);
+ } catch (final InterruptedException e) {
+ // Message sending has been interrupted, we are finished
+ LOGGER.debug("engine<-->deployment client interrupted");
+ break;
+ }
+ }
+
+ // Thread has been interrupted
+ thisThread = null;
+ LOGGER.debug("engine<-->deployment client thread finished");
+ }
+
+ /**
+ * Send an EngDep message to the Apex server.
+ *
+ * @param message the message to send to the Apex server
+ */
+ public void sendMessage(final Message message) {
+ final MessageHolder<Message> messageHolder = new MessageHolder<>(MessagingUtils.getHost());
+
+ // Send the message in its message holder
+ messageHolder.addMessage(message);
+ service.send(messageHolder);
+ }
+
+ /**
+ * Stop the deployment client.
+ */
+ public void stopClient() {
+ LOGGER.debug("engine<-->deployment test client stopping . . .");
+ thisThread.interrupt();
+
+ // Wait for the thread to stop
+ while (thisThread != null && thisThread.isAlive()) {
+ ThreadUtilities.sleep(CLIENT_STOP_WAIT_INTERVAL);
+ }
+
+ // Close the Web Services connection
+ service.stopConnection();
+ started = false;
+ LOGGER.debug("engine<-->deployment test client stopped . . .");
+ }
+
+ /**
+ * Checks if the client thread is started.
+ *
+ * @return true, if the client thread is started
+ */
+ public boolean isStarted() {
+ return started;
+ }
+
+ /**
+ * Allows users of this class to get a reference to the receive queue to receove messages.
+ *
+ * @return the receive queue
+ */
+ public BlockingQueue<Message> getReceiveQueue() {
+ return receiveQueue;
+ }
+
+ /**
+ * The listener interface for receiving deploymentClient events. The class that is interested in processing a
+ * deploymentClient event implements this interface, and the object created with that class is registered with a
+ * component using the component's {@code addDeploymentClientListener} method. When the deploymentClient event
+ * occurs, that object's appropriate method is invoked.
+ *
+ * @see DeploymentClientEvent
+ */
+ private class DeploymentClientListener implements MessageListener<Message> {
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(org.onap.policy.apex.core.
+ * infrastructure.messaging.impl.ws.messageblock. MessageBlock)
+ */
+ @Subscribe
+ @Override
+ public void onMessage(final MessageBlock<Message> messageData) {
+ receiveQueue.addAll(messageData.getMessages());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(java.lang.String)
+ */
+ @Override
+ public void onMessage(final String messageString) {
+ throw new UnsupportedOperationException("String mesages are not supported on the EngDep protocol");
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.deployment;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.concurrent.TimeUnit;
+
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.messages.EngineServiceInfoResponse;
+import org.onap.policy.apex.core.protocols.engdep.messages.GetEngineInfo;
+import org.onap.policy.apex.core.protocols.engdep.messages.GetEngineServiceInfo;
+import org.onap.policy.apex.core.protocols.engdep.messages.GetEngineStatus;
+import org.onap.policy.apex.core.protocols.engdep.messages.Response;
+import org.onap.policy.apex.core.protocols.engdep.messages.StartEngine;
+import org.onap.policy.apex.core.protocols.engdep.messages.StartPeriodicEvents;
+import org.onap.policy.apex.core.protocols.engdep.messages.StopEngine;
+import org.onap.policy.apex.core.protocols.engdep.messages.StopPeriodicEvents;
+import org.onap.policy.apex.core.protocols.engdep.messages.UpdateModel;
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.handling.ApexModelReader;
+import org.onap.policy.apex.model.basicmodel.handling.ApexModelWriter;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
+import org.onap.policy.apex.model.utilities.ResourceUtils;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class Deployer deploys an Apex model held as an XML file onto an Apex engine. It uses the EngDep protocol to
+ * communicate with the engine, with the EngDep protocol being carried on Java web sockets.
+ *
+ * This deployer is a simple command line deployer that reads the communication parameters and the location of the XML
+ * model file as arguments.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EngineServiceFacade {
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(EngineServiceFacade.class);
+
+ // The default message timeout and timeout increment (the amount of time between polls) in milliseconds
+ private static final int CLIENT_START_WAIT_INTERVAL = 100;
+ private static final int REPLY_MESSAGE_TIMEOUT_DEFAULT = 10000;
+ private static final int REPLY_MESSAGE_TIMEOUT_INCREMENT = 100;
+
+ // The Apex engine host and EngDep port
+ private final String hostName;
+ private final int port;
+
+ // The deployment client handles the EngDep communication session towards the Apex server
+ private DeploymentClient client = null;
+ private Thread clientThread = null;
+
+ // Information about the Engine service we are connected to
+ private AxArtifactKey engineServiceKey = null;
+ private AxArtifactKey[] engineKeyArray = null;
+ private AxArtifactKey apexModelKey = null;
+
+ /**
+ * Instantiates a new deployer.
+ *
+ * @param hostName the host name of the host running the Apex Engine
+ * @param port the port to use for EngDep communication with the Apex engine
+ */
+ public EngineServiceFacade(final String hostName, final int port) {
+ this.hostName = hostName;
+ this.port = port;
+ }
+
+ /**
+ * Initializes the facade, opens an EngDep communication session with the Apex engine.
+ *
+ * @throws ApexDeploymentException thrown on deployment and communication errors
+ */
+ public void init() throws ApexDeploymentException {
+ try {
+ LOGGER.debug("handshaking with server {}:{} . . .", hostName, port);
+
+ // Use the deployment client to handle the EngDep communication towards the Apex server. It runs a thread to
+ // monitor the session and to send
+ // messages
+ client = new DeploymentClient(hostName, port);
+ clientThread = new Thread(client);
+ clientThread.start();
+
+ // Wait for the connection to come up
+ while (!client.isStarted()) {
+ if (clientThread.isAlive()) {
+ ThreadUtilities.sleep(CLIENT_START_WAIT_INTERVAL);
+ } else {
+ LOGGER.error("cound not handshake with server {}:{}", hostName, port);
+ throw new ApexDeploymentException("cound not handshake with server " + hostName + ":" + port);
+ }
+ }
+
+ LOGGER.debug("opened connection to server {}:{} . . .", hostName, port);
+
+ // Get engine service information to see what engines we're dealing with
+ final GetEngineServiceInfo engineServiceInfo = new GetEngineServiceInfo(null);
+ LOGGER.debug("sending get engine service info message {} to server {}:{} . . .", engineServiceInfo,
+ hostName, port);
+ client.sendMessage(engineServiceInfo);
+ LOGGER.debug("sent get engine service info message to server {}:{} . . .", hostName, port);
+
+ final EngineServiceInfoResponse engineServiceInfoResponse =
+ (EngineServiceInfoResponse) getResponse(engineServiceInfo);
+ if (engineServiceInfoResponse.isSuccessful()) {
+ engineServiceKey = engineServiceInfoResponse.getEngineServiceKey();
+ engineKeyArray = engineServiceInfoResponse.getEngineKeyArray();
+ apexModelKey = engineServiceInfoResponse.getApexModelKey();
+ }
+ } catch (final Exception e) {
+ LOGGER.error("cound not handshake with server {}:{}", hostName, port, e);
+ client.stopClient();
+ throw new ApexDeploymentException("cound not handshake with server " + hostName + ":" + port, e);
+ }
+
+ }
+
+ /**
+ * Get the engine service key.
+ *
+ * @return the engine service key
+ */
+ public AxArtifactKey getApexModelKey() {
+ return apexModelKey;
+ }
+
+ /**
+ * Get the keys of the engines on this engine service.
+ *
+ * @return the engine key array
+ */
+ public AxArtifactKey[] getEngineKeyArray() {
+ return engineKeyArray;
+ }
+
+ /**
+ * Get the engine service key.
+ *
+ * @return the engine service key
+ */
+ public AxArtifactKey getKey() {
+ return engineServiceKey;
+ }
+
+ /**
+ * Close the EngDep connection to the Apex server.
+ */
+ public void close() {
+ LOGGER.debug("closing connection to server {}:{} . . .", hostName, port);
+
+ client.stopClient();
+
+ LOGGER.debug("closed connection to server {}:{} . . .", hostName, port);
+ }
+
+ /**
+ * Deploy an Apex model on the Apex engine service.
+ *
+ * @param modelFileName the name of the model file containing the model to deploy
+ * @param ignoreConflicts true if conflicts between context in polices is to be ignored
+ * @param force true if the model is to be applied even if it is incompatible with the existing model
+ * @throws ApexException on Apex errors
+ * @throws IOException on IO exceptions from the operating system
+ */
+ public void deployModel(final String modelFileName, final boolean ignoreConflicts, final boolean force)
+ throws ApexException, IOException {
+ if (engineServiceKey == null || engineKeyArray == null || engineKeyArray.length == 0) {
+ LOGGER.error("cound not deploy apex model, deployer is not initialized");
+ throw new ApexDeploymentException("cound not deploy apex model, deployer is not initialized");
+ }
+
+ // Get the model file as a string
+ URL apexModelURL = ResourceUtils.getLocalFile(modelFileName);
+ if (apexModelURL == null) {
+ apexModelURL = ResourceUtils.getURLResource(modelFileName);
+ if (apexModelURL == null) {
+ LOGGER.error("cound not create apex model, could not read from XML file {}", modelFileName);
+ throw new ApexDeploymentException(
+ "cound not create apex model, could not read XML file " + modelFileName);
+ }
+ }
+
+ deployModel(modelFileName, apexModelURL.openStream(), ignoreConflicts, force);
+ }
+
+ /**
+ * Deploy an Apex model on the Apex engine service.
+ *
+ * @param modelFileName the name of the model file containing the model to deploy
+ * @param modelInputStream the stream that holds the Apex model
+ * @param ignoreConflicts true if conflicts between context in polices is to be ignored
+ * @param force true if the model is to be applied even if it is incompatible with the existing model
+ * @throws ApexException on model deployment errors
+ */
+ public void deployModel(final String modelFileName, final InputStream modelInputStream,
+ final boolean ignoreConflicts, final boolean force) throws ApexException {
+ // Read the policy model from the stream
+ final ApexModelReader<AxPolicyModel> modelReader = new ApexModelReader<>(AxPolicyModel.class);
+ modelReader.setValidateFlag(!ignoreConflicts);
+ final AxPolicyModel apexPolicyModel = modelReader.read(modelInputStream);
+ if (apexPolicyModel == null) {
+ LOGGER.error("cound not create apex model, could not read model stream");
+ throw new ApexDeploymentException("cound not create apex model, could not read model stream");
+ }
+
+ // Deploy the model
+ deployModel(apexPolicyModel, ignoreConflicts, force);
+ }
+
+ /**
+ * Deploy an Apex model on the Apex engine service.
+ *
+ * @param apexPolicyModel the name of the model to deploy
+ * @param ignoreConflicts true if conflicts between context in polices is to be ignored
+ * @param force true if the model is to be applied even if it is incompatible with the existing model
+ * @throws ApexException on model deployment errors
+ */
+ public void deployModel(final AxPolicyModel apexPolicyModel, final boolean ignoreConflicts, final boolean force)
+ throws ApexException {
+ // Write the model into a byte array
+ final ByteArrayOutputStream baOutputStream = new ByteArrayOutputStream();
+ final ApexModelWriter<AxPolicyModel> modelWriter = new ApexModelWriter<>(AxPolicyModel.class);
+ modelWriter.write(apexPolicyModel, baOutputStream);
+
+ // Create and send Update message
+ final UpdateModel umMessage =
+ new UpdateModel(engineServiceKey, baOutputStream.toString(), ignoreConflicts, force);
+
+ LOGGER.debug("sending update message {} to server {}:{} . . .", umMessage, hostName, port);
+ client.sendMessage(umMessage);
+ LOGGER.debug("sent update message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(umMessage);
+ if (response.isSuccessful()) {
+ LOGGER.debug(response.toString());
+ } else {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+ }
+
+ /**
+ * Start an Apex engine on the engine service.
+ *
+ * @param engineKey the key of the engine to start
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void startEngine(final AxArtifactKey engineKey) throws ApexDeploymentException {
+ final StartEngine startEngineMessage = new StartEngine(engineKey);
+ LOGGER.debug("sending start engine {} to server {}:{} . . .", startEngineMessage, hostName, port);
+ client.sendMessage(startEngineMessage);
+ LOGGER.debug("sent start engine message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(startEngineMessage);
+ if (response.isSuccessful()) {
+ LOGGER.debug(response.toString());
+ } else {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexDeploymentException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+ }
+
+ /**
+ * Stop an Apex engine on the engine service.
+ *
+ * @param engineKey the key of the engine to stop
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void stopEngine(final AxArtifactKey engineKey) throws ApexDeploymentException {
+ final StopEngine stopEngineMessage = new StopEngine(engineKey);
+ LOGGER.debug("sending stop engine {} to server {}:{} . . .", stopEngineMessage, hostName, port);
+ client.sendMessage(stopEngineMessage);
+ LOGGER.debug("sent stop engine message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(stopEngineMessage);
+ if (response.isSuccessful()) {
+ LOGGER.debug(response.toString());
+ } else {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexDeploymentException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+ }
+
+ /**
+ * Start periodic events on an Apex engine on the engine service.
+ *
+ * @param engineKey the key of the engine to start periodic events on
+ * @param period the period in milliseconds between periodic events
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void startPerioidicEvents(final AxArtifactKey engineKey, final long period) throws ApexDeploymentException {
+ final StartPeriodicEvents startPerioidicEventsMessage = new StartPeriodicEvents(engineKey);
+ startPerioidicEventsMessage.setMessageData(Long.toString(period));
+ LOGGER.debug("sending start perioidic events {} to server {}:{} . . .", startPerioidicEventsMessage, hostName,
+ port);
+ client.sendMessage(startPerioidicEventsMessage);
+ LOGGER.debug("sent start perioidic events message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(startPerioidicEventsMessage);
+ if (response.isSuccessful()) {
+ LOGGER.debug(response.toString());
+ } else {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexDeploymentException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+ }
+
+ /**
+ * Stop periodic events on an Apex engine on the engine service.
+ *
+ * @param engineKey the key of the engine to stop periodic events on
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void stopPerioidicEvents(final AxArtifactKey engineKey) throws ApexDeploymentException {
+ final StopPeriodicEvents stopPerioidicEventsMessage = new StopPeriodicEvents(engineKey);
+ LOGGER.debug("sending stop perioidic events {} to server {}:{} . . .", stopPerioidicEventsMessage, hostName,
+ port);
+ client.sendMessage(stopPerioidicEventsMessage);
+ LOGGER.debug("sent stop perioidic events message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(stopPerioidicEventsMessage);
+ if (response.isSuccessful()) {
+ LOGGER.debug(response.toString());
+ } else {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexDeploymentException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+ }
+
+ /**
+ * Get the status of an Apex engine.
+ *
+ * @param engineKey the key of the engine to get the status of
+ * @return an engine model containing the status of the engine for the given key
+ * @throws ApexException the apex exception
+ */
+ public AxEngineModel getEngineStatus(final AxArtifactKey engineKey) throws ApexException {
+ final GetEngineStatus engineStatusMessage = new GetEngineStatus(engineKey);
+ LOGGER.debug("sending get engine status message {} to server {}:{} . . .", engineStatusMessage, hostName, port);
+ client.sendMessage(engineStatusMessage);
+ LOGGER.debug("sent get engine status message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(engineStatusMessage);
+ if (!response.isSuccessful()) {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+
+ final ByteArrayInputStream baInputStream = new ByteArrayInputStream(response.getMessageData().getBytes());
+ final ApexModelReader<AxEngineModel> modelReader = new ApexModelReader<>(AxEngineModel.class);
+ modelReader.setValidateFlag(false);
+ return modelReader.read(baInputStream);
+ }
+
+ /**
+ * Get the runtime information of an Apex engine.
+ *
+ * @param engineKey the key of the engine to get information for
+ * @return an engine model containing information on the engine for the given key
+ * @throws ApexException the apex exception
+ */
+ public String getEngineInfo(final AxArtifactKey engineKey) throws ApexException {
+ final GetEngineInfo engineInfoMessage = new GetEngineInfo(engineKey);
+ LOGGER.debug("sending get engine information message {} to server {}:{} . . .", engineInfoMessage, hostName,
+ port);
+ client.sendMessage(engineInfoMessage);
+ LOGGER.debug("sent get engine information message to server {}:{} . . .", hostName, port);
+
+ // Check if we got a response
+ final Response response = getResponse(engineInfoMessage);
+ if (!response.isSuccessful()) {
+ LOGGER.warn("failed response {} received from server {}:{}", response.getMessageData(), hostName, port);
+ throw new ApexException(
+ "failed response " + response.getMessageData() + " received from server" + hostName + ':' + port);
+ }
+
+ return response.getMessageData();
+ }
+
+ /**
+ * Check the response to a model deployment message from the Apex server.
+ *
+ * @param sentMessage the sent message
+ * @return the response message
+ * @throws ApexDeploymentException the apex deployment exception
+ */
+ private Response getResponse(final Message sentMessage) throws ApexDeploymentException {
+ // Get the amount of milliseconds we should wait for a timeout
+ int timeoutTime = sentMessage.getReplyTimeout();
+ if (timeoutTime <= 0) {
+ timeoutTime = REPLY_MESSAGE_TIMEOUT_DEFAULT;
+ }
+
+ // Wait for the required amount of milliseconds for the response from the Apex server
+ Message receivedMessage = null;
+ for (int timeWaitedSoFar = 0; receivedMessage == null && timeWaitedSoFar < timeoutTime; timeWaitedSoFar +=
+ REPLY_MESSAGE_TIMEOUT_INCREMENT) {
+ try {
+ receivedMessage = client.getReceiveQueue().poll(REPLY_MESSAGE_TIMEOUT_INCREMENT, TimeUnit.MILLISECONDS);
+ } catch (final InterruptedException e) {
+ LOGGER.warn("reception of response from server interrupted {}:{}", hostName, port, e);
+ throw new ApexDeploymentException(
+ "reception of response from server interrupted " + hostName + ':' + port, e);
+ }
+ }
+
+ // Check if response to sent message
+ if (receivedMessage == null) {
+ LOGGER.warn("no response received to sent message " + sentMessage.getAction());
+ throw new ApexDeploymentException("no response received to sent message " + sentMessage.getAction());
+ }
+
+ // Check instance is a response message
+ if (!(receivedMessage instanceof Response)) {
+ LOGGER.warn("response received from server is of incorrect type {}, should be of type {}",
+ receivedMessage.getClass().getName(), Response.class.getName());
+ throw new ApexDeploymentException("response received from server is of incorrect type "
+ + receivedMessage.getClass().getName() + ", should be of type " + Response.class.getName());
+ }
+
+ // Cast the response message
+ final Response responseMessage = (Response) receivedMessage;
+
+ // Check if response to sent message
+ if (!responseMessage.getResponseTo().equals(sentMessage)) {
+ LOGGER.warn("response received is not response to sent message " + sentMessage.getAction());
+ throw new ApexDeploymentException(
+ "response received is not correct response to sent message " + sentMessage.getAction());
+ }
+
+ // Check if successful
+ if (responseMessage.isSuccessful()) {
+ LOGGER.debug("response received: {} message was succssful: {}", sentMessage.getAction(),
+ responseMessage.getMessageData());
+ } else {
+ LOGGER.debug("response received: {} message failed: {}", sentMessage.getAction(),
+ responseMessage.getMessageData());
+ }
+
+ return responseMessage;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.deployment;
+
+import java.util.Arrays;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This utility class is used to start and stop periodic events on Apex engines over the EngDep protocol.
+ */
+public class PeriodicEventManager {
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(BatchDeployer.class);
+
+ private static final int NUM_ARGUMENTS = 4;
+ private static final int PERIODIC_EVENT_INTERVAL = 3;
+
+ // The facade that is handling messaging to the engine service
+ private EngineServiceFacade engineServiceFacade = null;
+
+ /**
+ * The main method, reads the Apex server host address, port and location of the Apex model XML file from the
+ * command line arguments.
+ *
+ * @param args the arguments that specify the Apex engine and the Apex model file
+ */
+ public static void main(final String[] args) {
+ if (args.length != NUM_ARGUMENTS) {
+ LOGGER.error("invalid arguments: " + Arrays.toString(args));
+ LOGGER.error("usage: Deployer <server address> <port address> <start/stop> <periods in ms>");
+ return;
+ }
+
+ PeriodicEventManager deployer = null;
+ try {
+ // Use a Deployer object to handle model deployment
+ deployer = new PeriodicEventManager(args[0], Integer.parseInt(args[1]));
+ deployer.init();
+ if (args[2].equalsIgnoreCase("start")) {
+ deployer.startPerioidicEvents(Long.parseLong(args[PERIODIC_EVENT_INTERVAL]));
+ } else {
+ deployer.stopPerioidicEvents();
+ }
+ } catch (final ApexException e) {
+ LOGGER.error("model deployment failed on parameters {}", args, e);
+ } finally {
+ if (deployer != null) {
+ deployer.close();
+ }
+ }
+ }
+
+ /**
+ * Instantiates a new deployer.
+ *
+ * @param hostName the host name of the host running the Apex Engine
+ * @param port the port to use for EngDep communication with the Apex engine
+ */
+ public PeriodicEventManager(final String hostName, final int port) {
+ engineServiceFacade = new EngineServiceFacade(hostName, port);
+ }
+
+ /**
+ * Initializes the deployer, opens an EngDep communication session with the Apex engine.
+ *
+ * @throws ApexDeploymentException thrown on deployment and communication errors
+ */
+ public void init() throws ApexDeploymentException {
+ engineServiceFacade.init();
+ }
+
+ /**
+ * Close the EngDep connection to the Apex server.
+ */
+ public void close() {
+ engineServiceFacade.close();
+ }
+
+ /**
+ * Start the Apex engines on the engine service.
+ *
+ * @param period the interval in milliseconds between periodic events
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void startPerioidicEvents(final long period) throws ApexDeploymentException {
+ for (final AxArtifactKey engineKey : engineServiceFacade.getEngineKeyArray()) {
+ engineServiceFacade.startPerioidicEvents(engineKey, period);
+ }
+ }
+
+ /**
+ * Stop the Apex engines on the engine service.
+ *
+ * @throws ApexDeploymentException on messaging errors
+ */
+ public void stopPerioidicEvents() throws ApexDeploymentException {
+ for (final AxArtifactKey engineKey : engineServiceFacade.getEngineKeyArray()) {
+ engineServiceFacade.stopPerioidicEvents(engineKey);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides a facade and client that allows Apex engines to be managed and monitored over the EngDep protocol. Some
+ * utility classes for deployment are also provided.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.deployment;
--- /dev/null
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core</artifactId>
+ <version>2.0.0-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>core-engine</artifactId>
+ <name>${project.artifactId}</name>
+ <description>The Apex policy execution engine</description>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.model</groupId>
+ <artifactId>policy-model</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.model</groupId>
+ <artifactId>engine-model</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.context</groupId>
+ <artifactId>context-management</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ <dependency>
+ <groupId>com.google.guava</groupId>
+ <artifactId>guava</artifactId>
+ </dependency>
+ </dependencies>
+</project>
\ No newline at end of file
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine;
+
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.parameters.ContextParameters;
+import org.onap.policy.apex.model.basicmodel.service.AbstractParameters;
+import org.onap.policy.apex.model.basicmodel.service.ParameterService;
+
+/**
+ * This class holds the parameters for a single Apex engine. This parameter class holds parameters for context schemas
+ * and context albums for the engine and a map of the logic flavour executors defined for the engine and the parameters
+ * for each of those executors.
+ * <p>
+ * The context parameters for the engine are held in a {@link ContextParameters} instance. This instance holds the
+ * parameters for context schema handling that will be used by the engine as well as the context album distribution,
+ * locking, and persistence parameters.
+ * <p>
+ * In Apex, an engine can be configured to use many logic flavours. The executors for each logic flavour are identified
+ * by their name. Each logic flavour executor must have an instance of {@link ExecutorParameters} defined for it, which
+ * specifies the executor plugins to use for that logic flavour executor and specific parameters for those executor
+ * plugins.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EngineParameters extends AbstractParameters {
+ private ContextParameters contextParameters = new ContextParameters();
+
+ // A map of parameters for executors of various logic types
+ private Map<String, ExecutorParameters> executorParameterMap = new TreeMap<String, ExecutorParameters>();
+
+ /**
+ * Constructor to create an engine parameters instance and register the instance with the parameter service.
+ */
+ public EngineParameters() {
+ super(EngineParameters.class.getCanonicalName());
+ ParameterService.registerParameters(EngineParameters.class, this);
+ }
+
+ /**
+ * Gets the parameters for context schema and album handling.
+ *
+ * @return the parameters for context schema and album handling
+ */
+ public ContextParameters getContextParameters() {
+ return contextParameters;
+ }
+
+ /**
+ * Sets the parameters for context schema and album handling.
+ *
+ * @param contextParameters the parameters for context schema and album handling
+ */
+ public void setContextParameters(final ContextParameters contextParameters) {
+ this.contextParameters = contextParameters;
+ }
+
+ /**
+ * Gets the executor parameter map of the engine.
+ *
+ * @return the executor parameter map of the engine
+ */
+ public Map<String, ExecutorParameters> getExecutorParameterMap() {
+ return executorParameterMap;
+ }
+
+ /**
+ * Sets the executor parameter map of the engine.
+ *
+ * @param executorParameterMap the executor parameter map of the engine
+ */
+ public void setExecutorParameterMap(final Map<String, ExecutorParameters> executorParameterMap) {
+ this.executorParameterMap = executorParameterMap;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine;
+
+import org.onap.policy.apex.model.basicmodel.service.AbstractParameters;
+import org.onap.policy.apex.model.basicmodel.service.ParameterService;
+
+/**
+ * This class provides the executors for a logic flavour. Plugin classes for execution of task logic, task selection
+ * logic, and state finalizer logic for the logic flavour must be specified.
+ * <p>
+ * Specializations of this class may provide extra parameters for their specific logic flavour executors.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ExecutorParameters extends AbstractParameters {
+ // Executor Plugin classes for executors
+ private String taskExecutorPluginClass;
+ private String taskSelectionExecutorPluginClass;
+ private String stateFinalizerExecutorPluginClass;
+
+ /**
+ * Constructor to create an executor parameters instance and register the instance with the parameter service.
+ */
+ public ExecutorParameters() {
+ super(ExecutorParameters.class.getCanonicalName());
+ ParameterService.registerParameters(ExecutorParameters.class, this);
+ }
+
+ /**
+ * Constructor to create an executor parameters instance with the name of a sub class of this class and register the
+ * instance with the parameter service.
+ *
+ * @param parameterClassName the class name of a sub class of this class
+ */
+ public ExecutorParameters(final String parameterClassName) {
+ super(parameterClassName);
+ }
+
+ /**
+ * Gets the task executor plugin class for the executor.
+ *
+ * @return the task executor plugin class for the executor
+ */
+ public String getTaskExecutorPluginClass() {
+ return taskExecutorPluginClass;
+ }
+
+ /**
+ * Sets the task executor plugin class for the executor.
+ *
+ * @param taskExecutorPluginClass the task executor plugin class for the executor
+ */
+ public void setTaskExecutorPluginClass(final String taskExecutorPluginClass) {
+ this.taskExecutorPluginClass = taskExecutorPluginClass;
+ }
+
+ /**
+ * Gets the task selection executor plugin class for the executor.
+ *
+ * @return the task selection executor plugin class for the executor
+ */
+ public String getTaskSelectionExecutorPluginClass() {
+ return taskSelectionExecutorPluginClass;
+ }
+
+ /**
+ * Sets the task selection executor plugin class for the executor.
+ *
+ * @param taskSelectionExecutorPluginClass the task selection executor plugin class for the executor
+ */
+ public void setTaskSelectionExecutorPluginClass(final String taskSelectionExecutorPluginClass) {
+ this.taskSelectionExecutorPluginClass = taskSelectionExecutorPluginClass;
+ }
+
+ /**
+ * Gets the state finalizer executor plugin class for the executor.
+ *
+ * @return the state finalizer executor plugin class for the executor
+ */
+ public String getStateFinalizerExecutorPluginClass() {
+ return stateFinalizerExecutorPluginClass;
+ }
+
+ /**
+ * Sets the state finalizer executor plugin class for the executor.
+ *
+ * @param stateFinalizerExecutorPluginClass the state finalizer executor plugin class for the executor
+ */
+ public void setStateFinalizerExecutorPluginClass(final String stateFinalizerExecutorPluginClass) {
+ this.stateFinalizerExecutorPluginClass = stateFinalizerExecutorPluginClass;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.model.basicmodel.service.AbstractParameters#toString()
+ */
+ @Override
+ public String toString() {
+ return "ExecutorParameters [taskExecutorPluginClass=" + taskExecutorPluginClass
+ + ", taskSelectionExecutorPluginClass=" + taskSelectionExecutorPluginClass
+ + ", StateFinalizerExecutorPluginClass=" + stateFinalizerExecutorPluginClass + "]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.context;
+
+import com.google.common.collect.Maps;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.NavigableMap;
+import java.util.Set;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.ContextAlbum;
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.context.Distributor;
+import org.onap.policy.apex.context.impl.distribution.DistributorFactory;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConceptGetter;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConceptGetterImpl;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbum;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbums;
+import org.onap.policy.apex.model.contextmodel.handling.ContextComparer;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
+import org.onap.policy.apex.model.utilities.comparison.KeyedMapDifference;
+
+/**
+ * This class manages the internal context for an Apex engine. This class is not thread safe and need not be because
+ * each Context object is owned by one and only one ApexEngine, which runs in a single thread and only runs one policy
+ * at a time. Therefore there is only ever one policy using a Context object at a time. The currentPolicyContextAlbum is
+ * set on the Context object by the StateMachineExecutor each time a policy is triggered.
+ *
+ * @author Liam Fallon
+ */
+public final class ApexInternalContext implements AxConceptGetter<ContextAlbum> {
+ // The key of the currently running Apex model
+ private final AxArtifactKey key;
+
+ // The context albums being used in this engine
+ private final NavigableMap<AxArtifactKey, ContextAlbum> contextAlbums =
+ Maps.synchronizedNavigableMap(new TreeMap<AxArtifactKey, ContextAlbum>());
+
+ // The internal context uses a context distributor to handle distribution of context across multiple instances
+ private Distributor contextDistributor = null;
+
+ // The key of the current policy, used to return the correct policy context album to the user
+ private final AxArtifactKey currentPolicyKey = null;
+
+ /**
+ * Constructor, instantiate the context object from the Apex model.
+ *
+ * @param apexPolicyModel the apex model
+ * @throws ContextException On errors on context setting
+ */
+ public ApexInternalContext(final AxPolicyModel apexPolicyModel) throws ContextException {
+ apexPolicyModel.register();
+
+ // The context distributor used to distribute context across policy engine instances
+ contextDistributor = new DistributorFactory().getDistributor(apexPolicyModel.getKey());
+
+ // Set up the context albums for this engine
+ for (final AxArtifactKey contextAlbumKey : ModelService.getModel(AxContextAlbums.class).getAlbumsMap()
+ .keySet()) {
+ contextAlbums.put(contextAlbumKey, contextDistributor.createContextAlbum(contextAlbumKey));
+ }
+
+ // Record the key of the current model
+ key = apexPolicyModel.getKey();
+ }
+
+ /**
+ * Get the key of the internal context, which is the same as the key of the engine.
+ *
+ * @return the key
+ */
+ public AxArtifactKey getKey() {
+ return key;
+ }
+
+ /**
+ * Get the context albums of the engine.
+ *
+ * @return the context albums
+ */
+ public Map<AxArtifactKey, ContextAlbum> getContextAlbums() {
+ return contextAlbums;
+ }
+
+ /**
+ * Update the current context so that it aligns with this incoming model, transferring context values if they exist
+ * in the new model.
+ *
+ * @param newPolicyModel The new incoming Apex model to use for context
+ * @throws ContextException On errors on context setting
+ */
+ public void update(final AxPolicyModel newPolicyModel) throws ContextException {
+ if (newPolicyModel == null) {
+ throw new ContextException("internal context update failed, supplied model is null");
+ }
+
+ // Get the differences between the existing context and the new context
+ final KeyedMapDifference<AxArtifactKey, AxContextAlbum> contextDifference =
+ new ContextComparer().compare(ModelService.getModel(AxContextAlbums.class), newPolicyModel.getAlbums());
+
+ // Remove maps that are no longer used
+ for (final Entry<AxArtifactKey, AxContextAlbum> removedContextAlbumEntry : contextDifference.getLeftOnly()
+ .entrySet()) {
+ contextDistributor.removeContextAlbum(removedContextAlbumEntry.getValue());
+ contextAlbums.remove(removedContextAlbumEntry.getKey());
+ }
+
+ // We switch over to the new Apex model
+ newPolicyModel.register();
+
+ // Set up the new context albums
+ for (final AxArtifactKey contextAlbumKey : contextDifference.getRightOnly().keySet()) {
+ contextAlbums.put(contextAlbumKey, contextDistributor.createContextAlbum(contextAlbumKey));
+ }
+
+ // Handle the updated maps
+ for (final Entry<AxArtifactKey, List<AxContextAlbum>> contextAlbumEntry : contextDifference.getDifferentValues()
+ .entrySet()) {
+ // Compare the updated maps
+ final AxContextAlbum currentContextAlbum = contextAlbumEntry.getValue().get(0);
+ final AxContextAlbum newContextAlbum = contextAlbumEntry.getValue().get(1);
+
+ // Check that the schemas are the same on the old and new context albums
+ if (currentContextAlbum.getItemSchema().equals(newContextAlbum.getItemSchema())) {
+ // The schema is different, throw an exception because the schema should not change if the key of the
+ // album has not changed
+ throw new ContextException("internal context update failed on context album \""
+ + contextAlbumEntry.getKey().getID() + "\" in model \"" + key.getID() + "\", schema \""
+ + currentContextAlbum.getItemSchema().getID()
+ + "\" on existing context model does not equal schema \""
+ + newContextAlbum.getItemSchema().getID() + "\" on incoming model");
+ }
+ }
+
+ }
+
+ /**
+ * Clear the internal context.
+ *
+ * @throws ContextException on clearing errors
+ */
+ public void clear() throws ContextException {
+ // Clear all context in the distributor
+ contextDistributor.clear();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "ApexInternalContext [contextAlbums=" + contextAlbums + ", contextDistributor=" + contextDistributor
+ + ", currentPolicyKey=" + currentPolicyKey + "]";
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.basicmodel.concepts.AxConceptGetter#get(org.onap.policy.apex.core.basicmodel.concepts.
+ * AxArtifactKey)
+ */
+ @Override
+ public ContextAlbum get(final AxArtifactKey conceptKey) {
+ return new AxConceptGetterImpl<>(contextAlbums).get(conceptKey);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.basicmodel.concepts.AxConceptGetter#get(java.lang.String)
+ */
+ @Override
+ public ContextAlbum get(final String conceptKeyName) {
+ return new AxConceptGetterImpl<>(contextAlbums).get(conceptKeyName);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.basicmodel.concepts.AxConceptGetter#get(java.lang.String, java.lang.String)
+ */
+ @Override
+ public ContextAlbum get(final String conceptKeyName, final String conceptKeyVersion) {
+ return new AxConceptGetterImpl<>(contextAlbums).get(conceptKeyName, conceptKeyVersion);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.basicmodel.concepts.AxConceptGetter#getAll(java.lang.String)
+ */
+ @Override
+ public Set<ContextAlbum> getAll(final String conceptKeyName) {
+ return new AxConceptGetterImpl<>(contextAlbums).getAll(conceptKeyName);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.basicmodel.concepts.AxConceptGetter#getAll(java.lang.String, java.lang.String)
+ */
+ @Override
+ public Set<ContextAlbum> getAll(final String conceptKeyName, final String conceptKeyVersion) {
+ return new AxConceptGetterImpl<>(contextAlbums).getAll(conceptKeyName, conceptKeyVersion);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Manages the context albums that an APEX engine requires during execution. It uses the policy model of the engine to
+ * determine what context albums the engine requires.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.context;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.engine;
+
+import java.util.Map;
+
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineState;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
+
+/**
+ * The Interface ApexEngine is used to control the execution of a single Apex engine thread. This engine instance
+ * executes the policies in an {@link AxPolicyModel}, which defines the policies that are executed by the engine and the
+ * context in which they execute. Many instances of an Apex engine may run on the same Apex model, in which case they
+ * operate the same policy set in parallel over the same context. When the {@code handleEvent} method is passed to the
+ * Apex engine, the engine executes the policy triggered by that event. A single Apex engine instance does not executed
+ * multiple policies in parallel, it receives a trigger event and executes the policy for that event to completion
+ * before it is available to execute another policy.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public interface ApexEngine {
+ /**
+ * The amount of milliseconds to wait for the current Apex engine to timeout on engine stop requests. If the timeout
+ * is exceeded, the stop aborts.
+ */
+ int APEX_ENGINE_STOP_EXECUTION_WAIT_TIMEOUT = 3000;
+
+ /** The wait increment (or pause time) when waiting for the Apex engine to stop. */
+ int APEX_ENGINE_STOP_EXECUTION_WAIT_INCREMENT = 100;
+
+ /**
+ * Update the Apex model to be used by the Apex engine. The engine must be in state "STOPPED" when the model is
+ * updated. The engine will replace the current model with the incoming model if the model of the engine was
+ * previously updated and the value of common context is transferred if there is common context in the old and new
+ * models.
+ *
+ * @param apexModel the apex model
+ * @throws ApexException on model update errors
+ */
+ void updateModel(AxPolicyModel apexModel) throws ApexException;
+
+ /**
+ * Starts an Apex engine so that it can receive events.
+ *
+ * @throws ApexException on start errors
+ */
+ void start() throws ApexException;
+
+ /**
+ * Stops an Apex engine in an orderly way. This method must be called prior to model updates.
+ *
+ * @throws ApexException on stop errors
+ */
+ void stop() throws ApexException;
+
+ /**
+ * Clears all models and data from an Apex engine. The engine must be stopped.
+ *
+ * @throws ApexException on clear errors
+ */
+ void clear() throws ApexException;
+
+ /**
+ * This method constructs an event with the correct event context so that it can later be sent to the Apex engine.
+ *
+ * @param eventKey The key of the event in the Apex model
+ * @return the created event
+ */
+ EnEvent createEvent(AxArtifactKey eventKey);
+
+ /**
+ * This method passes an event to the Apex model to invoke a policy. If the event matches a policy, then that policy
+ * is executed.
+ *
+ * @return return true if a policy was invoked without error, otherwise false.
+ * @param incomingEvent the incoming event
+ */
+ boolean handleEvent(EnEvent incomingEvent);
+
+ /**
+ * A method to add a call back listener class that listens for action events from the engine.
+ *
+ * @param listenerName the unique name of the listener
+ * @param listener is an instance of type {@link EnEventListener}
+ */
+ void addEventListener(String listenerName, EnEventListener listener);
+
+ /**
+ * A method to remove a call back listener class.
+ *
+ * @param listenerName the name of the listener to remove
+ */
+ void removeEventListener(String listenerName);
+
+ /**
+ * Get the artifact key of the engine.
+ *
+ * @return the artifact key
+ */
+ AxArtifactKey getKey();
+
+ /**
+ * Get the state of the engine.
+ *
+ * @return the engine state
+ */
+ AxEngineState getState();
+
+ /**
+ * Get the engine status information, this is just the engine state.
+ *
+ * @return the Apex status information
+ */
+ AxEngineModel getEngineStatus();
+
+ /**
+ * Get the engine run time information, the status and context.
+ *
+ * @return the Apex runtime information
+ */
+ Map<AxArtifactKey, Map<String, Object>> getEngineContext();
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.engine;
+
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+
+/**
+ * This interface is used by users of an Apex engine to receive action events being emitted by the engine.
+ *
+ * @author Liam Fallon
+ *
+ */
+public interface EnEventListener {
+
+ /**
+ * This method is called when an Apex engine emits an event.
+ *
+ * @param enEvent the engine event
+ * @throws ApexException the apex exception
+ */
+ void onEnEvent(EnEvent enEvent) throws ApexException;
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.engine.impl;
+
+import org.onap.policy.apex.core.engine.engine.ApexEngine;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * A factory class to create APEX engines of a given type. As there is only a single type of Apex engine in existence,
+ * this class is trivial.
+ *
+ * @author Liam Fallon
+ */
+public class ApexEngineFactory {
+
+ /**
+ * Create an Apex engine implementation.
+ *
+ * @param key the key
+ * @return the apex engine
+ */
+ public ApexEngine createApexEngine(final AxArtifactKey key) {
+ return new ApexEngineImpl(key);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.engine.impl;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.onap.policy.apex.context.ContextAlbum;
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.engine.ApexEngine;
+import org.onap.policy.apex.core.engine.engine.EnEventListener;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineState;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineStats;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class controls the thread of execution of a single engine in an Apex system. An engine is a single thread in a
+ * pool of engines that are running a set of policies. An engine is either inactive, waiting for a policy to be
+ * triggered or executing a policy. The engine runs off a queue of triggers that trigger its state machine. If the queue
+ * is empty, it waits for the next trigger. The Apex engine holds its state machine in a {@link StateMachineHandler}
+ * instance and uses its state machine handler to execute events.
+ *
+ * @author Liam Fallon
+ */
+public class ApexEngineImpl implements ApexEngine {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(ApexEngineImpl.class);
+
+ // The artifact key of this engine
+ private final AxArtifactKey key;
+
+ // The state of this engine
+ private AxEngineState state = AxEngineState.STOPPED;
+
+ // call back listeners
+ private final Map<String, EnEventListener> eventListeners = new LinkedHashMap<String, EnEventListener>();
+
+ // The context of this engine
+ private ApexInternalContext internalContext = null;
+
+ // The state machines
+ private StateMachineHandler stateMachineHandler = null;
+
+ // Statistics on engine execution
+ private final AxEngineStats engineStats;
+
+ /**
+ * Constructor, instantiate the engine with its state machine table.
+ *
+ * @param key the key of the engine
+ */
+ protected ApexEngineImpl(final AxArtifactKey key) {
+ argumentNotNull(key, "AxArtifactKey may not be null");
+
+ LOGGER.entry("ApexEngine()->" + key.getID() + "," + state);
+
+ this.key = key;
+
+ // Set up statistics collection
+ engineStats = new AxEngineStats();
+ engineStats.setKey(new AxReferenceKey(key, "_EngineStats"));
+
+ LOGGER.exit("ApexEngine()<-" + key.getID() + "," + state);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.engine.ApexEngine#updateModel(org.onap.policy.apex.model.policymodel.concepts.
+ * AxPolicyModel)
+ */
+ @Override
+ public void updateModel(final AxPolicyModel apexModel) throws ApexException {
+ if (apexModel != null) {
+ LOGGER.entry("updateModel()->" + key.getID() + ", apexPolicyModel=" + apexModel.getKey().getID());
+ } else {
+ LOGGER.warn("updateModel()<-" + key.getID() + ", Apex model not set");
+ throw new ApexException(
+ "updateModel()<-" + key.getID() + ", Apex model is not defined, it has a null value");
+ }
+
+ // The engine must be stopped in order to do a model update
+ if (!state.equals(AxEngineState.STOPPED)) {
+ throw new ApexException("updateModel()<-" + key.getID()
+ + ", cannot update model, engine should be stopped but is in state " + state);
+ }
+
+ // Create new internal context or update the existing one
+ try {
+ if (internalContext == null) {
+ /// New internal context
+ internalContext = new ApexInternalContext(apexModel);
+ } else {
+ // Exiting internal context which must be updated
+ internalContext.update(apexModel);
+ }
+ } catch (final ContextException e) {
+ LOGGER.warn(
+ "updateModel()<-" + key.getID() + ", error setting the context for engine \"" + key.getID() + "\"",
+ e);
+ throw new ApexException(
+ "updateModel()<-" + key.getID() + ", error setting the context for engine \"" + key.getID() + "\"",
+ e);
+ }
+
+ // Set up the state machines
+ try {
+ // We always set up state machines as new because it's only context that must be transferred; policies are
+ // always set up as new
+ stateMachineHandler = new StateMachineHandler(internalContext);
+ } catch (final StateMachineException e) {
+ LOGGER.warn("updateModel()<-" + key.getID() + ", error setting up the engine state machines \""
+ + key.getID() + "\"", e);
+ throw new ApexException("updateModel()<-" + key.getID() + ", error setting up the engine state machines \""
+ + key.getID() + "\"", e);
+ }
+
+ LOGGER.exit("updateModel()<-" + key.getID());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#start()
+ */
+ @Override
+ public void start() throws ApexException {
+ LOGGER.entry("start()" + key);
+
+ if (state != AxEngineState.STOPPED) {
+ LOGGER.warn("start()<-" + key.getID() + "," + state + ", cannot start engine, engine not in state STOPPED");
+ throw new ApexException(
+ "start()<-" + key.getID() + "," + state + ", cannot start engine, engine not in state STOPPED");
+ }
+
+ if (stateMachineHandler == null || internalContext == null) {
+ LOGGER.warn("start()<-" + key.getID() + "," + state
+ + ", cannot start engine, engine has not been initialized, its model is not loaded");
+ throw new ApexException("start()<-" + key.getID() + "," + state
+ + ", cannot start engine, engine has not been initialized, its model is not loaded");
+ }
+
+ // Set up the state machines
+ try {
+ // Start the state machines
+ stateMachineHandler.start();
+ engineStats.engineStart();
+ } catch (final StateMachineException e) {
+ LOGGER.warn("updateModel()<-" + key.getID() + ", error starting the engine state machines \"" + key.getID()
+ + "\"", e);
+ throw new ApexException("updateModel()<-" + key.getID() + ", error starting the engine state machines \""
+ + key.getID() + "\"", e);
+ }
+
+ // OK, we are good to go
+ state = AxEngineState.READY;
+
+ LOGGER.exit("start()" + key);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#stop()
+ */
+ @Override
+ public void stop() throws ApexException {
+ LOGGER.entry("stop()->" + key);
+
+ // Stop the engine if it is in state READY, if it is in state EXECUTING, wait for execution to finish
+ for (int increment = APEX_ENGINE_STOP_EXECUTION_WAIT_TIMEOUT; increment > 0; increment =
+ APEX_ENGINE_STOP_EXECUTION_WAIT_INCREMENT) {
+ synchronized (state) {
+ switch (state) {
+ // Already stopped
+ case STOPPED:
+
+ throw new ApexException("stop()<-" + key.getID() + "," + state
+ + ", cannot stop engine, engine is already stopped");
+ // The normal case, the engine wasn't doing anything or it was executing
+ case READY:
+ case STOPPING:
+
+ state = AxEngineState.STOPPED;
+ stateMachineHandler.stop();
+ engineStats.engineStop();
+ LOGGER.exit("stop()" + key);
+ return;
+ // Engine is executing a policy, wait for it to stop
+ case EXECUTING:
+ state = AxEngineState.STOPPING;
+ break;
+ default:
+ throw new ApexException("stop()<-" + key.getID() + "," + state
+ + ", cannot stop engine, engine is in an undefined state");
+ }
+ }
+ }
+
+ throw new ApexException("stop()<-" + key.getID() + "," + state + ", cannot stop engine, engine stop timed out");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#clear()
+ */
+ @Override
+ public void clear() throws ApexException {
+ LOGGER.entry("clear()->" + key);
+ if (state != AxEngineState.STOPPED) {
+ throw new ApexException(
+ "clear" + "()<-" + key.getID() + "," + state + ", cannot clear engine, engine is not stopped");
+ }
+
+ // Clear everything
+ stateMachineHandler = null;
+ engineStats.clean();
+ internalContext.clear();
+ internalContext = null;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#createEvent(org.onap.policy.apex.core.model.concepts.
+ * AxArtifactKey)
+ */
+ @Override
+ public EnEvent createEvent(final AxArtifactKey eventKey) {
+ if (state != AxEngineState.READY && state != AxEngineState.EXECUTING) {
+ LOGGER.warn(
+ "createEvent()<-" + key.getID() + "," + state + ", cannot create event, engine not in state READY");
+ return null;
+ }
+
+ try {
+ // Create an event using the internal context
+ return new EnEvent(eventKey);
+ } catch (final Exception e) {
+ LOGGER.warn("createEvent()<-" + key.getID() + "," + state + ", error on event creation", e);
+ return null;
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.engine.ApexEngine#handleEvent(org.onap.policy.apex.core.engine.event.EnEvent)
+ */
+ @Override
+ public boolean handleEvent(final EnEvent incomingEvent) {
+ boolean ret = false;
+ if (incomingEvent == null) {
+ LOGGER.warn("handleEvent()<-" + key.getID() + "," + state + ", cannot run engine, incoming event is null");
+ return ret;
+ }
+
+ synchronized (state) {
+ if (state != AxEngineState.READY) {
+ LOGGER.warn("handleEvent()<-" + key.getID() + "," + state
+ + ", cannot run engine, engine not in state READY");
+ return ret;
+ }
+
+ state = AxEngineState.EXECUTING;
+ }
+
+ LOGGER.debug("execute(): triggered by event " + incomingEvent.toString());
+
+ // By default we return a null event on errors
+ EnEvent outgoingEvent = null;
+ try {
+ engineStats.executionEnter(incomingEvent.getKey());
+ outgoingEvent = stateMachineHandler.execute(incomingEvent);
+ engineStats.executionExit();
+ ret = true;
+ } catch (final StateMachineException e) {
+ LOGGER.warn("handleEvent()<-" + key.getID() + "," + state + ", engine execution error: ", e);
+
+ // Create an exception return event
+ outgoingEvent = createExceptionEvent(incomingEvent, e);
+ }
+
+ // Publish the outgoing event
+ try {
+ synchronized (eventListeners) {
+ if (eventListeners.isEmpty()) {
+ LOGGER.debug("handleEvent()<-" + key.getID() + "," + state
+ + ", There is no listener registered to recieve outgoing event: " + outgoingEvent);
+ }
+ for (final EnEventListener axEventListener : eventListeners.values()) {
+ axEventListener.onEnEvent(outgoingEvent);
+ }
+ }
+ } catch (final ApexException e) {
+ LOGGER.warn("handleEvent()<-" + key.getID() + "," + state + ", outgoing event publishing error: ", e);
+ ret = false;
+ }
+ synchronized (state) {
+ // Only go to READY if we are still in state EXECUTING, we could be in state STOPPING
+ if (state == AxEngineState.EXECUTING) {
+ state = AxEngineState.READY;
+ }
+ }
+ return ret;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#addEventListener(java.lang.String,
+ * org.onap.policy.apex.core.engine.engine.EnEventListener)
+ */
+ @Override
+ public void addEventListener(final String listenerName, final EnEventListener listener) {
+ eventListeners.put(listenerName, listener);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#removeEventListener(java.lang.String)
+ */
+ @Override
+ public void removeEventListener(final String listenerName) {
+ eventListeners.remove(listenerName);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#getKey()
+ */
+ @Override
+ public AxArtifactKey getKey() {
+ return key;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#getState()
+ */
+ @Override
+ public final AxEngineState getState() {
+ return state;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#getEngineStatus()
+ */
+ @Override
+ public AxEngineModel getEngineStatus() {
+ final AxEngineModel engineModel = new AxEngineModel(key);
+ engineModel.setTimestamp(System.currentTimeMillis());
+ engineModel.setState(state);
+ engineModel.setStats(engineStats);
+ return engineModel;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.engine.ApexEngine#getEngineRuntime()
+ */
+ @Override
+ public Map<AxArtifactKey, Map<String, Object>> getEngineContext() {
+ final Map<AxArtifactKey, Map<String, Object>> currentContext =
+ new LinkedHashMap<AxArtifactKey, Map<String, Object>>();
+
+ for (final Entry<AxArtifactKey, ContextAlbum> contextAlbumEntry : internalContext.getContextAlbums()
+ .entrySet()) {
+ currentContext.put(contextAlbumEntry.getKey(), contextAlbumEntry.getValue());
+ }
+
+ return currentContext;
+ }
+
+ /**
+ * Get the internal context for the Apex engine.
+ *
+ * @return The Apex Internal Context
+ */
+ public ApexInternalContext getInternalContext() {
+ return internalContext;
+ }
+
+ /**
+ * Create an exception event from the incoming event including the exception information on the event.
+ *
+ * @param incomingEvent The incoming event that caused the exception
+ * @param eventException The exception that was thrown
+ * @return the exception event
+ */
+ private EnEvent createExceptionEvent(final EnEvent incomingEvent, final Exception eventException) {
+ // The exception event is a clone of the incoming event with the exception suffix added to its name and an extra
+ // field "ExceptionMessage" added
+ final EnEvent exceptionEvent = (EnEvent) incomingEvent.clone();
+
+ // Create the cascaded message string
+ final StringBuilder exceptionMessageStringBuilder = new StringBuilder();
+ exceptionMessageStringBuilder.append(eventException.getMessage());
+
+ Throwable subException = eventException.getCause();
+ while (subException != null) {
+ exceptionMessageStringBuilder.append("\ncaused by: ");
+ exceptionMessageStringBuilder.append(subException.getMessage());
+ subException = subException.getCause();
+ }
+
+ // Set the exception message on the event
+ exceptionEvent.setExceptionMessage(exceptionMessageStringBuilder.toString());
+
+ return exceptionEvent;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.engine.impl;
+
+import java.util.HashMap;
+
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.ExecutorFactory;
+import org.onap.policy.apex.core.engine.executor.StateMachineExecutor;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.core.engine.executor.impl.ExecutorFactoryImpl;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicies;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicy;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This handler holds and manages state machines for each policy in an Apex engine. When the class is instantiated, an
+ * executor {@link StateMachineExecutor} is created for each policy in the policy model the state machine handler will
+ * execute. The executors for each policy are held in a map indexed by event.
+ * <p>
+ * When an event is received on the policy, the state machine executor to execute that event is looked up on the
+ * executor map and the event is passed to the executor for execution.
+ *
+ * @author Liam Fallon
+ *
+ */
+public class StateMachineHandler {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(StateMachineHandler.class);
+
+ // The key of the Apex model we are executing
+ private final AxArtifactKey key;
+
+ // The state machines in this engine
+ private final HashMap<AxEvent, StateMachineExecutor> stateMachineExecutorMap = new HashMap<>();
+
+ // The executor factory is used to get logic executors for the particular type of executor we need for task
+ // selection logic or task logic
+ private final ExecutorFactory executorFactory;
+
+ /**
+ * This constructor builds the state machines for the policies in the apex model.
+ *
+ * @param internalContext The internal context we are using
+ * @throws StateMachineException On state machine initiation errors
+ */
+ protected StateMachineHandler(final ApexInternalContext internalContext) throws StateMachineException {
+ LOGGER.entry("StateMachineHandler()->" + internalContext.getKey().getID());
+
+ key = internalContext.getKey();
+
+ // Create the executor factory to generate executors as the engine runs policies
+ executorFactory = new ExecutorFactoryImpl();
+
+ // Iterate over the policies in the policy model and create a state machine for each one
+ for (final AxPolicy policy : ModelService.getModel(AxPolicies.class).getPolicyMap().values()) {
+ // Create a state machine for this policy
+ final StateMachineExecutor thisStateMachineExecutor =
+ new StateMachineExecutor(executorFactory, policy.getKey());
+
+ // This executor is the top executor so has no parent
+ thisStateMachineExecutor.setContext(null, policy, internalContext);
+
+ // Get the incoming trigger event
+ final AxEvent triggerEvent = ModelService.getModel(AxEvents.class)
+ .get(policy.getStateMap().get(policy.getFirstState()).getTrigger());
+
+ // Put the state machine executor on the map for this trigger
+ final StateMachineExecutor lastStateMachineExecutor =
+ stateMachineExecutorMap.put(triggerEvent, thisStateMachineExecutor);
+ if (lastStateMachineExecutor != null
+ && lastStateMachineExecutor.getSubject() != thisStateMachineExecutor.getSubject()) {
+ LOGGER.error("No more than one policy in a model can have the same trigger event. In model "
+ + internalContext.getKey().getID() + " Policy ("
+ + lastStateMachineExecutor.getSubject().getKey().getID() + ") and Policy ("
+ + thisStateMachineExecutor.getSubject().getKey().getID() + ") have the same Trigger event ("
+ + triggerEvent.getKey().getID() + ") ");
+ LOGGER.error(" Policy (" + lastStateMachineExecutor.getSubject().getKey() + ") has overwritten Policy ("
+ + thisStateMachineExecutor.getSubject().getKey().getID()
+ + " so this overwritten policy will never be triggered in this engine.");
+ }
+ }
+
+ LOGGER.exit("StateMachineHandler()<-" + internalContext.getKey().getID());
+ }
+
+ /**
+ * This constructor starts the state machines for each policy, carrying out whatever initialization executors need.
+ *
+ * @throws StateMachineException On state machine initiation errors
+ */
+ protected void start() throws StateMachineException {
+ LOGGER.entry("start()->" + key.getID());
+
+ // Iterate over the state machines
+ for (final StateMachineExecutor smExecutor : stateMachineExecutorMap.values()) {
+ try {
+ smExecutor.prepare();
+ } catch (final StateMachineException e) {
+ final String stateMachineID = smExecutor.getContext().getKey().getID();
+ LOGGER.warn("start()<-" + key.getID() + ", start failed, state machine \"" + stateMachineID + "\"", e);
+ throw new StateMachineException(
+ "start()<-" + key.getID() + ", start failed, state machine \"" + stateMachineID + "\"", e);
+ }
+ }
+
+ LOGGER.exit("start()<-" + key.getID());
+ }
+
+ /**
+ * This method is called to execute an event on the state machines in an engine.
+ *
+ * @param event The trigger event for the state machine
+ * @return The result of the state machine execution run
+ * @throws StateMachineException On execution errors in a state machine
+ */
+ protected EnEvent execute(final EnEvent event) throws StateMachineException {
+ LOGGER.entry("execute()->" + event.getName());
+
+ // Try to execute the state machine for the trigger
+ final StateMachineExecutor stateMachineExecutor = stateMachineExecutorMap.get(event.getAxEvent());
+ if (stateMachineExecutor == null) {
+ final String exceptionMessage =
+ "state machine execution not possible, policy not found for trigger event " + event.getName();
+ LOGGER.warn(exceptionMessage);
+
+ event.setExceptionMessage(exceptionMessage);
+ return event;
+ }
+
+ // Run the state machine
+ try {
+ LOGGER.debug("execute(): state machine \"{}\" execution starting . . .", stateMachineExecutor);
+ final EnEvent outputObject = stateMachineExecutor.execute(event.getExecutionID(), event);
+
+ LOGGER.debug("execute()<-: state machine \"{}\" execution completed", stateMachineExecutor);
+ return outputObject;
+ } catch (final Exception e) {
+ LOGGER.warn("execute()<-: state machine \"" + stateMachineExecutor + "\" execution failed", e);
+ throw new StateMachineException("execute()<-: execution failed on state machine " + stateMachineExecutor,
+ e);
+ }
+ }
+
+ /**
+ * Closes down the state machines of an engine.
+ */
+ protected void stop() {
+ LOGGER.entry("stop()->");
+
+ // Iterate through all state machines and clean them
+ for (final StateMachineExecutor smExecutor : stateMachineExecutorMap.values()) {
+ try {
+ smExecutor.cleanUp();
+ } catch (final StateMachineException e) {
+ final String smID = smExecutor.getContext().getKey().getID();
+ LOGGER.warn("stop()<-clean up failed, state machine \"" + smID + "\" cleanup failed", e);
+ }
+ }
+ LOGGER.exit("stop()<-");
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the implementation of the {@link org.onap.policy.apex.core.engine.engine.ApexEngine} interface.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.engine.impl;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Defines the Apex engine Java API. The API is used to set up, control, send events to, and receive events from an APEX
+ * engine. The {@link ApexEngine} interface is used to control the execution of a single APEX engine thread and to send
+ * events to that APEX engine thread. The {@link EnEventListener} interface is used to listen for events being emitted
+ * by an APEX engine thread.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.engine;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.event;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+
+import org.onap.policy.apex.core.engine.monitoring.EventMonitor;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
+import org.onap.policy.apex.model.eventmodel.concepts.AxField;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * Instances of the Class EnEvent are events being passed through the Apex system. All events in the system are
+ * instances of this class.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EnEvent extends HashMap<String, Object> {
+ private static final long serialVersionUID = 6311863111866294637L;
+
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(EnEvent.class);
+
+ // The definition of this event in the Apex model
+ private final AxEvent axEvent;
+
+ // The event monitor for this event
+ private final EventMonitor eventMonitor = new EventMonitor();
+
+ // The stack of execution of this event, used for monitoring
+ private AxConcept[] userArtifactStack;
+
+ private static Random rand = new Random(System.nanoTime());
+
+ // An identifier for the current event execution. The default value here will always be a random number, and should
+ // be reset
+ private long executionID = rand.nextLong();
+
+ // A string holding a message that indicates why processing of this event threw an exception
+ private String exceptionMessage;
+
+ /**
+ * Instantiates a new EnEvent, an Engine Event.
+ *
+ * @param eventKey the key of the event definition from the Apex model
+ */
+ public EnEvent(final AxArtifactKey eventKey) {
+ this(ModelService.getModel(AxEvents.class).get(eventKey));
+ }
+
+ /**
+ * Instantiates a new EnEvent, an Engine Event.
+ *
+ * @param axEvent the event definition from the Apex model
+ */
+ public EnEvent(final AxEvent axEvent) {
+ super();
+ // Save the event definition from the Apex model
+ this.axEvent = axEvent;
+ }
+
+ /**
+ * Gets the event definition of this event.
+ *
+ * @return the event definition
+ */
+ public AxEvent getAxEvent() {
+ return axEvent;
+ }
+
+ /**
+ * Get the name of the event.
+ *
+ * @return the event name
+ */
+ public String getName() {
+ return axEvent.getKey().getName();
+ }
+
+ /**
+ * Get the key of the event.
+ *
+ * @return the event key
+ */
+ public AxArtifactKey getKey() {
+ return axEvent.getKey();
+ }
+
+ /**
+ * Get the ID of the event.
+ *
+ * @return the event key
+ */
+ public String getID() {
+ return axEvent.getKey().getID();
+ }
+
+ /**
+ * Get the currently set value for the ExecutionID for this event. A ExecutionID in an EnEvent is used identify all
+ * EnEvents (input, internal and output events) used in a single Engine invocation. Therefore, a ExecutionID can be
+ * used to match which output event is the result of a particular input event. The default initialized value for the
+ * ExecutionID is always unique in a single JVM.
+ *
+ * @return the currently set value for the ExecutionID for this event.
+ */
+ public long getExecutionID() {
+ return executionID;
+ }
+
+ /**
+ * Set the value for the ExecutionID for this event. A ExecutionID in an EnEvent is used identify all EnEvents
+ * (input, internal and output events) used in a single Engine invocation. Therefore, a ExecutionID can be used to
+ * match which output event is the result of a particular input event. The default initialised value for the
+ * ExecutionID is always unique in a single JVM.
+ *
+ * @param executionID the new value for the ExecutionID for this event.
+ */
+ public void setExecutionID(final long executionID) {
+ this.executionID = executionID;
+ }
+
+ /**
+ * Gets the exception message explaining why processing of this event to fail.
+ *
+ * @return the exception message
+ */
+ public String getExceptionMessage() {
+ return exceptionMessage;
+ }
+
+ /**
+ * Sets the exception message explaining why processing of this event to fail.
+ *
+ * @param exceptionMessage the exception message
+ */
+ public void setExceptionMessage(final String exceptionMessage) {
+ this.exceptionMessage = exceptionMessage;
+ }
+
+ /**
+ * Store the user artifact stack of the event.
+ *
+ * @param usedArtifactStackArray the event user artifact stack
+ */
+ public void setUserArtifactStack(final AxConcept[] usedArtifactStackArray) {
+ userArtifactStack = usedArtifactStackArray;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#get(java.lang.Object)
+ */
+ @Override
+ public Object get(final Object key) {
+ if (key == null) {
+ LOGGER.warn("null values are illegal on method parameter \"key\"");
+ throw new EnException("null values are illegal on method parameter \"key\"");
+ }
+
+ // Check if this key is a parameter on our event
+ final AxField eventParameter = axEvent.getParameterMap().get(key);
+ if (eventParameter == null) {
+ LOGGER.warn("parameter with key " + key + " not defined on this event");
+ throw new EnException("parameter with key " + key + " not defined on this event");
+ }
+
+ // Get the item
+ final Object item = super.get(key);
+
+ // Get the parameter value and monitor it
+ eventMonitor.monitorGet(eventParameter, item, userArtifactStack);
+ return item;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#values()
+ */
+ @Override
+ public Collection<Object> values() {
+ // Build the key set and return it
+ final ArrayList<Object> valueList = new ArrayList<>();
+
+ // Override the generic "values()" call as we want to monitor the gets
+ for (final String key : super.keySet()) {
+ valueList.add(this.get(key));
+ }
+
+ return valueList;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#entrySet()
+ */
+ @Override
+ public Set<Map.Entry<String, Object>> entrySet() {
+ // Build the entry set and return it
+ final Set<Map.Entry<String, Object>> entrySet = new HashSet<>();
+
+ // Override the generic "entrySet()" call as we want to monitor the gets
+ for (final String key : super.keySet()) {
+ entrySet.add(new SimpleEntry<>(key, this.get(key)));
+ }
+
+ return entrySet;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#put(java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public Object put(final String key, final Object incomingValue) {
+ if (key == null) {
+ LOGGER.warn("null keys are illegal on method parameter \"key\"");
+ throw new EnException("null keys are illegal on method parameter \"key\"");
+ }
+
+ // Check if this key is a parameter on our event
+ final AxField eventParameter = axEvent.getParameterMap().get(key);
+ if (eventParameter == null) {
+ LOGGER.warn("parameter with key \"" + key + "\" not defined on event \"" + getName() + "\"");
+ throw new EnException("parameter with key \"" + key + "\" not defined on event \"" + getName() + "\"");
+ }
+
+ // We allow null values
+ if (incomingValue == null) {
+ eventMonitor.monitorSet(eventParameter, incomingValue, userArtifactStack);
+ return super.put(key, incomingValue);
+ }
+
+ // Holder for the object to assign
+ final Object valueToAssign = new EnField(eventParameter, incomingValue).getAssignableValue();
+
+ // Update the value in the parameter map
+ eventMonitor.monitorSet(eventParameter, valueToAssign, userArtifactStack);
+ return super.put(key, valueToAssign);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#putAll(java.util.Map)
+ */
+ @Override
+ public void putAll(final Map<? extends String, ? extends Object> incomingMap) {
+ // Override the generic "putAll()" call as we want to monitor the puts
+ for (final java.util.Map.Entry<? extends String, ? extends Object> incomingEntry : incomingMap.entrySet()) {
+ put(incomingEntry.getKey(), incomingEntry.getValue());
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#remove(java.lang.Object)
+ */
+ @Override
+ public Object remove(final Object key) {
+ if (key == null) {
+ LOGGER.warn("null keys are illegal on method parameter \"key\"");
+ throw new EnException("null keys are illegal on method parameter \"key\"");
+ }
+
+ // Check if this key is a parameter on our event
+ final AxField eventParameter = axEvent.getParameterMap().get(key);
+ if (eventParameter == null) {
+ LOGGER.warn("parameter with key " + key + " not defined on this event");
+ throw new EnException("parameter with key " + key + " not defined on this event");
+ }
+
+ final Object removedValue = super.remove(key);
+ eventMonitor.monitorRemove(eventParameter, removedValue, userArtifactStack);
+ return removedValue;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.Map#clear()
+ */
+ @Override
+ public void clear() {
+ // Override the generic "clear()" call as we want to monitor removals
+ final Set<String> deleteSet = new HashSet<>();
+ deleteSet.addAll(keySet());
+
+ for (final String deleteKey : deleteSet) {
+ this.remove(deleteKey);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.AbstractMap#toString()
+ */
+ @Override
+ public String toString() {
+ return "EnEvent [axEvent=" + axEvent + ", userArtifactStack=" + Arrays.toString(userArtifactStack) + ", map="
+ + super.toString() + "]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.event;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexRuntimeException;
+
+/**
+ * This class will be called if an error occurs in Apex event handling.
+ *
+ * @author Liam Fallon
+ */
+public class EnException extends ApexRuntimeException {
+ private static final long serialVersionUID = -8507246953751956974L;
+
+ /**
+ * Instantiates a new engine event exception.
+ *
+ * @param message the message
+ */
+ public EnException(final String message) {
+ super(message);
+ }
+
+ /**
+ * Instantiates a new engine event exception.
+ *
+ * @param message the message
+ * @param e the e
+ */
+ public EnException(final String message, final Exception e) {
+ super(message, e);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.event;
+
+import java.io.Serializable;
+
+import org.onap.policy.apex.context.ContextRuntimeException;
+import org.onap.policy.apex.context.SchemaHelper;
+import org.onap.policy.apex.context.impl.schema.SchemaHelperFactory;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.eventmodel.concepts.AxField;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * Instances of the Class EnField are event fields being passed through the Apex system.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EnField implements Serializable {
+ private static final long serialVersionUID = -5713525780081840333L;
+
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(EnField.class);
+
+ // The definition of this field in the Apex model
+ private final AxField axField;
+
+ // The schema helper for this field
+ private SchemaHelper schemaHelper;
+
+ // The value of this field
+ private final Object value;
+
+ /**
+ * Instantiates a new EnField, an Engine Field.
+ *
+ * @param axField the field definition from the Apex model
+ * @param value the value
+ */
+ public EnField(final AxField axField, final Object value) {
+ // Save the field definition from the Apex model
+ this.axField = axField;
+ this.value = value;
+
+ // Get a schema helper to handle translations of fields to and from the schema
+ try {
+ schemaHelper = new SchemaHelperFactory().createSchemaHelper(axField.getKey(), axField.getSchema());
+ } catch (final ContextRuntimeException e) {
+ final String message = "schema helper cannot be created for parameter with key \"" + axField.getID()
+ + "\" with schema \"" + axField.getSchema() + "\"";
+ LOGGER.warn(message, e);
+ throw new EnException(message, e);
+ }
+ }
+
+ /**
+ * Gets the field definition of this field.
+ *
+ * @return the field definition
+ */
+ public AxField getAxField() {
+ return axField;
+ }
+
+ /**
+ * Gets the schema helper of this field.
+ *
+ * @return the schema helper for this field
+ */
+ public SchemaHelper getSchemaHelper() {
+ return schemaHelper;
+ }
+
+ /**
+ * Get the name of the field.
+ *
+ * @return the field name
+ */
+ public String getName() {
+ return axField.getKey().getLocalName();
+ }
+
+ /**
+ * Get the key of the field.
+ *
+ * @return the field key
+ */
+ public AxReferenceKey getKey() {
+ return axField.getKey();
+ }
+
+ /**
+ * Get the value of the field.
+ *
+ * @return the value
+ */
+ public Object getValue() {
+ return value;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "EnField [axField=" + axField + ", value=" + value + "]";
+ }
+
+ /**
+ * Get an assignable object that will work with the field.
+ *
+ * @return the assignable value
+ */
+ public Object getAssignableValue() {
+ // Use the schema helper to get the translated value of the object
+ return schemaHelper.unmarshal(value);
+ }
+
+ /**
+ * Is the value object assignable to this field.
+ *
+ * @return true if the value is assignable
+ */
+ public boolean isAssignableValue() {
+ try {
+ schemaHelper.unmarshal(value);
+ return true;
+ } catch (final Exception e) {
+ return false;
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the event handling classes that an APEX engine uses and which uses use to send and receive events to and
+ * from an APEX engine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.event;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+
+/**
+ * This interface defines what operations must be provided by an executing entity in Apex. It is implemented by classes
+ * that execute logic in a state machine. Each executor has an incoming entity {@code IN} that triggers execution, an
+ * outgoing entity {@code OUT} that is produced by execution, a subject {@code SUBJECT} that is being executed, and a
+ * context {@code CONTEXT} in which execution is being carried out. An executor can be part of a chain of executors and
+ * the {@code setNext} method is used to set the next executor to be executed after this executor has completed.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ *
+ * @param <IN> type of the incoming entity
+ * @param <OUT> type of the outgoing entity
+ * @param <SUBJECT> type that is the subject of execution
+ * @param <CONTEXT> context holding the context of execution
+ */
+
+public interface Executor<IN, OUT, SUBJECT, CONTEXT> {
+ /**
+ * Save the subject and context of the executor.
+ *
+ * @param parent the parent executor of this executor or null if this executor is the top executor
+ * @param executorSubject the executor subject, the subject of execution
+ * @param executorContext the executor context, the context in which execution takes place
+ */
+ void setContext(Executor<?, ?, ?, ?> parent, SUBJECT executorSubject, CONTEXT executorContext);
+
+ /**
+ * Prepares the processing.
+ *
+ * @throws StateMachineException thrown when a state machine execution error occurs
+ */
+ void prepare() throws StateMachineException;
+
+ /**
+ * Executes the executor, running through its context in its natural order.
+ *
+ * @param executionID the execution ID of the current APEX execution policy thread
+ * @param incomingEntity the incoming entity that triggers execution
+ * @return The outgoing entity that is the result of execution
+ * @throws StateMachineException on an execution error
+ * @throws ContextException on context errors
+ */
+ OUT execute(long executionID, IN incomingEntity) throws StateMachineException, ContextException;
+
+ /**
+ * Carry out the preparatory work for execution.
+ *
+ * @param executionID the execution ID of the current APEX execution policy thread
+ * @param incomingEntity the incoming entity that triggers execution
+ * @throws StateMachineException on an execution error
+ * @throws ContextException on context errors
+ */
+ void executePre(long executionID, IN incomingEntity) throws StateMachineException, ContextException;
+
+ /**
+ * Carry out the post work for execution, the returning entity should be set by the child execution object.
+ *
+ * @param returnValue the return value indicates whether the execution was successful and, if it failed, how it
+ * failed
+ * @throws StateMachineException on an execution error
+ * @throws ContextException On context errors
+ */
+ void executePost(boolean returnValue) throws StateMachineException, ContextException;
+
+ /**
+ * Cleans up after processing.
+ *
+ * @throws StateMachineException thrown when a state machine execution error occurs
+ */
+ void cleanUp() throws StateMachineException;
+
+ /**
+ * Get the key associated with the executor.
+ *
+ * @return The key associated with the executor
+ */
+ AxConcept getKey();
+
+ /**
+ * Get the parent executor of the executor.
+ *
+ * @return The parent executor of this executor
+ */
+ Executor<?, ?, ?, ?> getParent();
+
+ /**
+ * Get the subject of the executor.
+ *
+ * @return The subject for the executor
+ */
+ SUBJECT getSubject();
+
+ /**
+ * Get the context of the executor.
+ *
+ * @return The context for the executor
+ */
+ CONTEXT getContext();
+
+ /**
+ * Get the incoming object of the executor.
+ *
+ * @return The incoming object for the executor
+ */
+ IN getIncoming();
+
+ /**
+ * Get the outgoing object of the executor.
+ *
+ * @return The outgoing object for the executor
+ */
+ OUT getOutgoing();
+
+ /**
+ * Save the next executor for this executor.
+ *
+ * @param nextExecutor the next executor
+ */
+ void setNext(Executor<IN, OUT, SUBJECT, CONTEXT> nextExecutor);
+
+ /**
+ * Get the next executor to be run after this executor completes its execution.
+ *
+ * @return The next executor
+ */
+ Executor<IN, OUT, SUBJECT, CONTEXT> getNext();
+
+ /**
+ * Set parameters for this executor, overloaded by executors that use parameters.
+ *
+ * @param parameters executor parameters
+ */
+ void setParameters(ExecutorParameters parameters);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateFinalizerLogic;
+import org.onap.policy.apex.model.policymodel.concepts.AxTask;
+
+/**
+ * This class is used by the state machine to get implementations of task selection and task executors.
+ *
+ * @author Liam Fallon
+ */
+
+public abstract class ExecutorFactory {
+ /**
+ * Get an executor for task selection logic.
+ *
+ * @param stateExecutor the state executor that is requesting the task selection executor
+ * @param state the state containing the task selection logic
+ * @param context the context the context in which the task selection logic will execute
+ * @return The executor that will run the task selection logic
+ */
+ public abstract TaskSelectExecutor getTaskSelectionExecutor(Executor<?, ?, ?, ?> stateExecutor, AxState state,
+ ApexInternalContext context);
+
+ /**
+ * Get an executor for task logic.
+ *
+ * @param stateExecutor the state executor that is requesting the task executor
+ * @param task the task containing the task logic
+ * @param context the context the context in which the task logic will execute
+ * @return The executor that will run the task logic
+ */
+ public abstract TaskExecutor getTaskExecutor(Executor<?, ?, ?, ?> stateExecutor, AxTask task,
+ ApexInternalContext context);
+
+ /**
+ * Get an executor for state finalizer logic.
+ *
+ * @param stateExecutor the state executor that is requesting the state finalizer executor
+ * @param logic the state finalizer logic to execute
+ * @param context the context the context in which the state finalizer logic will execute
+ * @return The executor that will run the state finalizer logic
+ */
+ public abstract StateFinalizerExecutor getStateFinalizerExecutor(Executor<?, ?, ?, ?> stateExecutor,
+ AxStateFinalizerLogic logic, ApexInternalContext context);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineRuntimeException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateFinalizerLogic;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateOutput;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateTaskOutputType;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateTaskReference;
+import org.onap.policy.apex.model.policymodel.concepts.AxTask;
+import org.onap.policy.apex.model.policymodel.concepts.AxTasks;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class is the executor for a state of a policy.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StateExecutor implements Executor<EnEvent, StateOutput, AxState, ApexInternalContext> {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(StateExecutor.class);
+
+ // Hold the state and context definitions for this state
+ private AxState axState = null;
+ private Executor<?, ?, ?, ?> parent = null;
+ private ApexInternalContext context = null;
+
+ // Holds the incoming event and the state output for this state
+ private EnEvent lastIncomingEvent = null;
+ private StateOutput lastStateOutput = null;
+
+ // The task selection logic executor
+ private TaskSelectExecutor taskSelectExecutor = null;
+
+ // The map of task executors for this state
+ private final Map<AxArtifactKey, TaskExecutor> taskExecutorMap = new HashMap<>();
+
+ // The map of state outputs used directly by tasks
+ private final Map<AxArtifactKey, String> directStateOutputMap = new HashMap<>();
+
+ // The map of state finalizer logic executors used by tasks
+ private final Map<AxArtifactKey, StateFinalizerExecutor> task2StateFinalizerMap = new HashMap<>();
+
+ // The next state executor
+ private Executor<EnEvent, StateOutput, AxState, ApexInternalContext> nextExecutor = null;
+
+ // The executor factory
+ private ExecutorFactory executorFactory = null;
+
+ /**
+ * Constructor, save the executor factory.
+ *
+ * @param executorFactory the executor factory to use for getting executors for task selection logic
+ */
+ public StateExecutor(final ExecutorFactory executorFactory) {
+ this.executorFactory = executorFactory;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setContext(org.onap.policy.apex.core.engine.executor.Executor,
+ * java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public void setContext(final Executor<?, ?, ?, ?> incomingParent, final AxState incomingAxState,
+ final ApexInternalContext incomingContext) {
+ // Save the state and context definition
+ this.parent = incomingParent;
+ this.axState = incomingAxState;
+ this.context = incomingContext;
+
+ // Set the task selection executor
+ taskSelectExecutor = executorFactory.getTaskSelectionExecutor(this, axState, context);
+
+ // Set a task executor for each task
+ for (final Entry<AxArtifactKey, AxStateTaskReference> stateTaskReferenceEntry : axState.getTaskReferences()
+ .entrySet()) {
+ final AxArtifactKey taskKey = stateTaskReferenceEntry.getKey();
+ final AxStateTaskReference taskReference = stateTaskReferenceEntry.getValue();
+
+ // Get the task
+ final AxTask task = ModelService.getModel(AxTasks.class).get(taskKey);
+
+ // Create a task executor for the task
+ taskExecutorMap.put(taskKey, executorFactory.getTaskExecutor(this, task, context));
+
+ // Check what type of output is specified for the task on this sate
+ if (taskReference.getStateTaskOutputType().equals(AxStateTaskOutputType.DIRECT)) {
+ // Create a task state output reference for this task
+ directStateOutputMap.put(taskKey, taskReference.getOutput().getLocalName());
+ } else if (taskReference.getStateTaskOutputType().equals(AxStateTaskOutputType.LOGIC)) {
+ // Get the state finalizer logic for this task
+ final AxStateFinalizerLogic finalizerLogic =
+ axState.getStateFinalizerLogicMap().get(taskReference.getOutput().getLocalName());
+ if (finalizerLogic == null) {
+ // Finalizer logic for the task does not exist
+ throw new StateMachineRuntimeException("state finalizer logic on task reference \"" + taskReference
+ + "\" on state \"" + axState.getID() + "\" does not exist");
+ }
+
+ // Create a state finalizer executor for the task
+ task2StateFinalizerMap.put(taskKey,
+ executorFactory.getStateFinalizerExecutor(this, finalizerLogic, context));
+ } else {
+ // This should never happen but.....
+ throw new StateMachineRuntimeException("invalid state output type on task reference \"" + taskReference
+ + "\" on state \"" + axState.getID() + "\"");
+ }
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#prepare()
+ */
+ @Override
+ public void prepare() throws StateMachineException {
+ // There may be no task selection logic
+ if (taskSelectExecutor != null) {
+ // Prepare the task selector
+ taskSelectExecutor.prepare();
+ }
+
+ // Prepare the tasks
+ for (final TaskExecutor taskExecutor : taskExecutorMap.values()) {
+ taskExecutor.prepare();
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#execute(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public StateOutput execute(final long executionID, final EnEvent incomingEvent)
+ throws StateMachineException, ContextException {
+ this.lastIncomingEvent = incomingEvent;
+
+ // Check that the incoming event matches the trigger for this state
+ if (!incomingEvent.getAxEvent().getKey().equals(axState.getTrigger())) {
+ throw new StateMachineException("incoming event \"" + incomingEvent.getID() + "\" does not match trigger \""
+ + axState.getTrigger().getID() + "\" of state \"" + axState.getID() + "\"");
+ }
+
+ // The key of the task to execute
+ AxArtifactKey taskKey = null;
+
+ try {
+ // There may be no task selection logic, in which case just return the default task
+ if (taskSelectExecutor != null) {
+ // Fire the task selector to find the task to run
+ taskKey = taskSelectExecutor.execute(executionID, incomingEvent);
+ }
+
+ // If there's no task selection logic or the TSL returned no task, just use the default task
+ if (taskKey == null) {
+ taskKey = axState.getDefaultTask();
+ }
+
+ // Execute the task
+ final TreeMap<String, Object> incomingValues = new TreeMap<>();
+ incomingValues.putAll(incomingEvent);
+ final Map<String, Object> taskExecutionResultMap =
+ taskExecutorMap.get(taskKey).execute(executionID, incomingValues);
+ final AxTask task = taskExecutorMap.get(taskKey).getSubject();
+
+ // Check if this task has direct output
+ String stateOutputName = directStateOutputMap.get(taskKey);
+
+ // If a direct state output name was not found, state finalizer logic should be defined for the task
+ if (stateOutputName == null) {
+ // State finalizer logic should exist for the task
+ final StateFinalizerExecutor finalizerLogicExecutor = task2StateFinalizerMap.get(taskKey);
+ if (finalizerLogicExecutor == null) {
+ throw new StateMachineException("state finalizer logic for task \"" + taskKey.getID()
+ + "\" not found for state \"" + axState.getID() + "\"");
+ }
+
+ // Execute the state finalizer logic to select a state output and to adjust the taskExecutionResultMap
+ stateOutputName =
+ finalizerLogicExecutor.execute(incomingEvent.getExecutionID(), taskExecutionResultMap);
+ }
+
+ // Now look up the the actual state output
+ final AxStateOutput stateOutputDefinition = axState.getStateOutputs().get(stateOutputName);
+ if (stateOutputDefinition == null) {
+ throw new StateMachineException("state output definition for state output \"" + stateOutputName
+ + "\" not found for state \"" + axState.getID() + "\"");
+ }
+
+ // Create the state output and transfer all the fields across to its event
+ final StateOutput stateOutput = new StateOutput(stateOutputDefinition);
+ this.lastStateOutput = stateOutput;
+
+ stateOutput.setEventFields(task.getRawOutputFields(), taskExecutionResultMap);
+
+ // Copy across fields from the incoming event that are not set on the outgoing event
+ stateOutput.copyUnsetFields(incomingEvent);
+
+ // Set the ExecutionID for the outgoing event to the value in the incoming event.
+ if (stateOutput != null && stateOutput.getOutputEvent() != null) {
+ stateOutput.getOutputEvent().setExecutionID(incomingEvent.getExecutionID());
+ }
+
+ // That's it, the state execution is complete
+ return stateOutput;
+ } catch (final Exception e) {
+ final String errorMessage = "State execution of state \"" + axState.getID() + "\" on task \""
+ + (taskKey != null ? taskKey.getID() : "null") + "\" failed: " + e.getMessage();
+
+ LOGGER.warn(errorMessage);
+ throw new StateMachineException(errorMessage, e);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePre(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public final void executePre(final long executionID, final EnEvent incomingEntity) throws StateMachineException {
+ throw new StateMachineException("execution pre work not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePost(boolean)
+ */
+ @Override
+ public final void executePost(final boolean returnValue) throws StateMachineException {
+ throw new StateMachineException("execution post work not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#cleanUp()
+ */
+ @Override
+ public void cleanUp() throws StateMachineException {
+ // Clean the tasks
+ for (final TaskExecutor taskExecutor : taskExecutorMap.values()) {
+ taskExecutor.cleanUp();
+ }
+
+ if (taskSelectExecutor != null) {
+ // Clean the task selector
+ taskSelectExecutor.cleanUp();
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getKey()
+ */
+ @Override
+ public AxReferenceKey getKey() {
+ return axState.getKey();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getParent()
+ */
+ @Override
+ public Executor<?, ?, ?, ?> getParent() {
+ return parent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getSubject()
+ */
+ @Override
+ public AxState getSubject() {
+ return axState;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getContext()
+ */
+ @Override
+ public final ApexInternalContext getContext() {
+ return context;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getIncoming()
+ */
+ @Override
+ public final EnEvent getIncoming() {
+ return lastIncomingEvent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getOutgoing()
+ */
+ @Override
+ public final StateOutput getOutgoing() {
+ return lastStateOutput;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setNext(org.onap.policy.apex.core.engine.executor.Executor)
+ */
+ @Override
+ public final void setNext(final Executor<EnEvent, StateOutput, AxState, ApexInternalContext> incomingNextExecutor) {
+ this.nextExecutor = incomingNextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getNext()
+ */
+ @Override
+ public final Executor<EnEvent, StateOutput, AxState, ApexInternalContext> getNext() {
+ return nextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#setParameters(org.onap.policy.apex.core.engine.
+ * ExecutorParameters)
+ */
+ @Override
+ public void setParameters(final ExecutorParameters parameters) {}
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import java.util.Map;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.context.StateFinalizerExecutionContext;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateFinalizerLogic;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This abstract class executes state finalizer logic in a state of an Apex policy and is specialized by classes that
+ * implement execution of state finalizer logic.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public abstract class StateFinalizerExecutor
+ implements Executor<Map<String, Object>, String, AxStateFinalizerLogic, ApexInternalContext> {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(StateFinalizerExecutor.class);
+
+ // Hold the state and context definitions
+ private Executor<?, ?, ?, ?> parent = null;
+ private AxState axState = null;
+ private AxStateFinalizerLogic finalizerLogic = null;
+ private ApexInternalContext internalContext = null;
+
+ // Holds the incoming and outgoing fields
+ private Map<String, Object> incomingFields = null;
+
+ // The next state finalizer executor
+ private Executor<Map<String, Object>, String, AxStateFinalizerLogic, ApexInternalContext> nextExecutor = null;
+
+ // The execution context; contains the facades for events and context to be used by tasks executed by this task
+ // executor
+ private StateFinalizerExecutionContext executionContext = null;
+
+ /**
+ * Gets the execution internalContext.
+ *
+ * @return the execution context
+ */
+ protected StateFinalizerExecutionContext getExecutionContext() {
+ return executionContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setContext(org.onap.policy.apex.core.engine.executor.Executor,
+ * java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public void setContext(final Executor<?, ?, ?, ?> incomingParent,
+ final AxStateFinalizerLogic incomingFinalizerLogic, final ApexInternalContext incomingInternalContext) {
+ this.parent = incomingParent;
+ axState = (AxState) parent.getSubject();
+ this.finalizerLogic = incomingFinalizerLogic;
+ this.internalContext = incomingInternalContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#prepare()
+ */
+ @Override
+ public void prepare() throws StateMachineException {
+ LOGGER.debug("prepare:" + finalizerLogic.getID() + "," + finalizerLogic.getLogicFlavour() + ","
+ + finalizerLogic.getLogic());
+ argumentNotNull(finalizerLogic.getLogic(), StateMachineException.class, "task logic cannot be null.");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#execute(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public String execute(final long executionID, final Map<String, Object> newIncomingFields)
+ throws StateMachineException, ContextException {
+ throw new StateMachineException(
+ "execute() not implemented on abstract StateFinalizerExecutionContext class, only on its subclasses");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePre(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public final void executePre(final long executionID, final Map<String, Object> newIncomingFields)
+ throws StateMachineException, ContextException {
+ LOGGER.debug("execute-pre:" + finalizerLogic.getLogicFlavour() + "," + getSubject().getID() + ","
+ + finalizerLogic.getLogic());
+
+ // Record the incoming fields
+ this.incomingFields = newIncomingFields;
+
+ // Get state finalizer context object
+ executionContext = new StateFinalizerExecutionContext(this, executionID, axState, getIncoming(),
+ axState.getStateOutputs().keySet(), getContext());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePost(boolean)
+ */
+ @Override
+ public final void executePost(final boolean returnValue) throws StateMachineException, ContextException {
+ if (!returnValue) {
+ String errorMessage = "execute-post: state finalizer logic execution failure on state \"" + axState.getID()
+ + "\" on finalizer logic " + finalizerLogic.getID();
+ if (executionContext.getMessage() != null) {
+ errorMessage += ", user message: " + executionContext.getMessage();
+ }
+ LOGGER.warn(errorMessage);
+ throw new StateMachineException(errorMessage);
+ }
+
+ // Check a state output has been selected
+ if (getOutgoing() == null) {
+ LOGGER.warn("execute-post: state finalizer logic \"" + finalizerLogic.getID()
+ + "\" did not select an output state");
+ throw new StateMachineException("execute-post: state finalizer logic \"" + finalizerLogic.getID()
+ + "\" did not select an output state");
+ }
+
+ if (!axState.getStateOutputs().keySet().contains(getOutgoing())) {
+ LOGGER.warn(
+ "execute-post: state finalizer logic \"" + finalizerLogic.getID() + "\" selected output state \""
+ + getOutgoing() + "\" that does not exsist on state \"" + axState.getID() + "\"");
+ throw new StateMachineException(
+ "execute-post: state finalizer logic \"" + finalizerLogic.getID() + "\" selected output state \""
+ + getOutgoing() + "\" that does not exsist on state \"" + axState.getID() + "\"");
+ }
+
+ LOGGER.debug("execute-post:" + finalizerLogic.getID() + ", returning state output \"" + getOutgoing()
+ + " and fields " + incomingFields);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#cleanUp()
+ */
+ @Override
+ public void cleanUp() throws StateMachineException {
+ throw new StateMachineException("cleanUp() not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getKey()
+ */
+ @Override
+ public AxReferenceKey getKey() {
+ return finalizerLogic.getKey();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getParent()
+ */
+ @Override
+ public Executor<?, ?, ?, ?> getParent() {
+ return parent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getSubject()
+ */
+ @Override
+ public AxStateFinalizerLogic getSubject() {
+ return finalizerLogic;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getContext()
+ */
+ @Override
+ public ApexInternalContext getContext() {
+ return internalContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getIncoming()
+ */
+ @Override
+ public Map<String, Object> getIncoming() {
+ return incomingFields;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getOutgoing()
+ */
+ @Override
+ public String getOutgoing() {
+ return executionContext.getSelectedStateOutputName();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setNext(org.onap.policy.apex.core.engine.executor.Executor)
+ */
+ @Override
+ public void setNext(
+ final Executor<Map<String, Object>, String, AxStateFinalizerLogic, ApexInternalContext> incomingNextExecutor) {
+ this.nextExecutor = incomingNextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getNext()
+ */
+ @Override
+ public Executor<Map<String, Object>, String, AxStateFinalizerLogic, ApexInternalContext> getNext() {
+ return nextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#setParameters(org.onap.policy.apex.core.engine.
+ * ExecutorParameters)
+ */
+ @Override
+ public void setParameters(final ExecutorParameters parameters) {}
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.policymodel.concepts.AxPolicy;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateOutput;
+
+/**
+ * This class is the executor for a state machine built from a policy.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StateMachineExecutor implements Executor<EnEvent, EnEvent, AxPolicy, ApexInternalContext> {
+ // The Apex Policy and context for this state machine
+ private AxPolicy axPolicy = null;
+ private Executor<?, ?, ?, ?> parent = null;
+ private ApexInternalContext internalContext = null;
+
+ // The list of state executors for this state machine
+ private final Map<AxReferenceKey, StateExecutor> stateExecutorMap = new TreeMap<>();
+
+ // The first executor
+ private StateExecutor firstExecutor = null;
+
+ // The next state machine executor
+ private Executor<EnEvent, EnEvent, AxPolicy, ApexInternalContext> nextExecutor = null;
+
+ // The executor factory
+ private ExecutorFactory executorFactory = null;
+
+ /**
+ * Constructor, save the executor factory that will give us executors for task selection logic and task logic.
+ *
+ * @param executorFactory the executor factory
+ * @param owner the artifact key of the owner of this state machine
+ */
+ public StateMachineExecutor(final ExecutorFactory executorFactory, final AxArtifactKey owner) {
+ this.executorFactory = executorFactory;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setContext(org.onap.policy.apex.core.engine.executor.Executor,
+ * java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public void setContext(final Executor<?, ?, ?, ?> newParent, final AxPolicy newAxPolicy,
+ final ApexInternalContext newInternalContext) {
+ // Save the policy and context for this state machine
+ this.parent = newParent;
+ this.axPolicy = newAxPolicy;
+ this.internalContext = newInternalContext;
+
+ // Clear the first executor, setContext can be called multiple times
+ firstExecutor = null;
+
+ // Create the state executors for this state machine
+ StateExecutor lastExecutor = null;
+ for (final AxState state : axPolicy.getStateMap().values()) {
+ // Create a state executor for this state and add its context (the state)
+ final StateExecutor stateExecutor = new StateExecutor(executorFactory);
+ stateExecutor.setContext(this, state, internalContext);
+
+ // Update the next executor on the last executor
+ if (lastExecutor != null) {
+ lastExecutor.setNext(stateExecutor);
+ }
+ lastExecutor = stateExecutor;
+
+ // Add the state executor to the executor list
+ stateExecutorMap.put(state.getKey(), stateExecutor);
+
+ // Set the first executor if it is not set
+ if (state.getKey().getLocalName().equals(axPolicy.getFirstState())) {
+ firstExecutor = stateExecutor;
+ }
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#prepare()
+ */
+ @Override
+ public void prepare() throws StateMachineException {
+ for (final StateExecutor stateExecutor : stateExecutorMap.values()) {
+ stateExecutor.prepare();
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executeDirected(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public EnEvent execute(final long executionID, final EnEvent incomingEvent)
+ throws StateMachineException, ContextException {
+ // Check if there are any states on the state machine
+ if (stateExecutorMap.size() == 0) {
+ throw new StateMachineException("no states defined on state machine");
+ }
+
+ // Check if the first state of the machine is defined
+ if (firstExecutor == null) {
+ throw new StateMachineException("first state not defined on state machine");
+ }
+
+ // Get the first state of the state machine and define a state output that starts state execution
+ StateExecutor stateExecutor = firstExecutor;
+ StateOutput stateOutput = new StateOutput(new AxStateOutput(firstExecutor.getSubject().getKey(),
+ incomingEvent.getKey(), firstExecutor.getSubject().getKey()), incomingEvent);
+ while (true) {
+ // Execute the state
+ stateOutput = stateExecutor.execute(executionID, stateOutput.getOutputEvent());
+ if (stateOutput == null) {
+ throw new StateMachineException("state execution failed, invalid state output returned");
+ }
+
+ // Use the next state of the state output to find if all the states have executed
+ if (stateOutput.getNextState().equals(AxReferenceKey.getNullKey())) {
+ break;
+ }
+
+ // Use the next state of the state output to find the next state
+ stateExecutor = stateExecutorMap.get(stateOutput.getNextState());
+ if (stateExecutor == null) {
+ throw new StateMachineException(
+ "state execution failed, next state \"" + stateOutput.getNextState().getID() + "\" not found");
+ }
+ }
+
+ return stateOutput.getOutputEvent();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePre(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public final void executePre(final long executionID, final EnEvent incomingEntity) throws StateMachineException {
+ throw new StateMachineException("execution pre work not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePost(boolean)
+ */
+ @Override
+ public final void executePost(final boolean returnValue) throws StateMachineException {
+ throw new StateMachineException("execution post work not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#cleanUp()
+ */
+ @Override
+ public void cleanUp() throws StateMachineException {
+ for (final StateExecutor stateExecutor : stateExecutorMap.values()) {
+ stateExecutor.cleanUp();
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getKey()
+ */
+ @Override
+ public AxArtifactKey getKey() {
+ return axPolicy.getKey();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getParent()
+ */
+ @Override
+ public final Executor<?, ?, ?, ?> getParent() {
+ return parent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getSubject()
+ */
+ @Override
+ public final AxPolicy getSubject() {
+ return axPolicy;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getContext()
+ */
+ @Override
+ public final ApexInternalContext getContext() {
+ return internalContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getIncoming()
+ */
+ @Override
+ public final EnEvent getIncoming() {
+ return null;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getOutgoing()
+ */
+ @Override
+ public final EnEvent getOutgoing() {
+ return null;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setNext(org.onap.policy.apex.core.engine.executor.Executor)
+ */
+ @Override
+ public final void setNext(final Executor<EnEvent, EnEvent, AxPolicy, ApexInternalContext> newNextExecutor) {
+ this.nextExecutor = newNextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getNext()
+ */
+ @Override
+ public final Executor<EnEvent, EnEvent, AxPolicy, ApexInternalContext> getNext() {
+ return nextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#setParameters(org.onap.policy.apex.core.engine.
+ * ExecutorParameters)
+ */
+ @Override
+ public void setParameters(final ExecutorParameters parameters) {}
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
+import org.onap.policy.apex.model.eventmodel.concepts.AxField;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateOutput;
+import org.onap.policy.apex.model.utilities.Assertions;
+
+/**
+ * This class is the output of a state, and is used by the engine to decide what the next state for execution is.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StateOutput {
+ // The state output has a state and an event
+ private final AxStateOutput stateOutputDefinition;
+ private final AxEvent outputEventDef;
+ private final EnEvent outputEvent;
+
+ /**
+ * Create a new state output from a state output definition.
+ *
+ * @param axStateOutput the state output definition
+ */
+ public StateOutput(final AxStateOutput axStateOutput) {
+ this(axStateOutput, new EnEvent(axStateOutput.getOutgingEvent()));
+ }
+
+ /**
+ * Create a new state output with the given definition and event key.
+ *
+ * @param stateOutputDefinition the state output definition
+ * @param outputEvent the output event
+ */
+ public StateOutput(final AxStateOutput stateOutputDefinition, final EnEvent outputEvent) {
+ Assertions.argumentNotNull(stateOutputDefinition, "stateOutputDefinition may not be null");
+ Assertions.argumentNotNull(outputEvent, "outputEvent may not be null");
+
+ this.stateOutputDefinition = stateOutputDefinition;
+ this.outputEvent = outputEvent;
+ outputEventDef = ModelService.getModel(AxEvents.class).get(stateOutputDefinition.getOutgingEvent());
+ }
+
+ /**
+ * Gets the next state.
+ *
+ * @return the next state
+ */
+ public AxReferenceKey getNextState() {
+ return stateOutputDefinition.getNextState();
+ }
+
+ /**
+ * Gets the state output definition.
+ *
+ * @return the state output definition
+ */
+ public AxStateOutput getStateOutputDefinition() {
+ return stateOutputDefinition;
+ }
+
+ /**
+ * Gets the output event.
+ *
+ * @return the output event
+ */
+ public EnEvent getOutputEvent() {
+ return outputEvent;
+ }
+
+ /**
+ * Transfer the fields from the incoming field map into the event.
+ *
+ * @param incomingFieldDefinitionMap definitions of the incoming fields
+ * @param eventFieldMap the event field map
+ * @throws StateMachineException on errors populating the event fields
+ */
+ public void setEventFields(final Map<String, AxField> incomingFieldDefinitionMap,
+ final Map<String, Object> eventFieldMap) throws StateMachineException {
+ Assertions.argumentNotNull(incomingFieldDefinitionMap, "incomingFieldDefinitionMap may not be null");
+ Assertions.argumentNotNull(eventFieldMap, "eventFieldMap may not be null");
+
+ if (!incomingFieldDefinitionMap.keySet().equals(eventFieldMap.keySet())) {
+ throw new StateMachineException(
+ "field definitions and values do not match for event " + outputEventDef.getID() + '\n'
+ + incomingFieldDefinitionMap.keySet() + '\n' + eventFieldMap.keySet());
+ }
+ for (final Entry<String, Object> incomingFieldEntry : eventFieldMap.entrySet()) {
+ final String fieldName = incomingFieldEntry.getKey();
+ final AxField fieldDef = incomingFieldDefinitionMap.get(fieldName);
+ try {
+
+ // Check if this field is a field in the event
+ if (!outputEventDef.getFields().contains(fieldDef)) {
+ throw new StateMachineException(
+ "field \"" + fieldName + "\" does not exist on event \"" + outputEventDef.getID() + "\"");
+ }
+ } catch (final Exception e) {
+ e.printStackTrace();
+ }
+
+ // Set the value in the output event
+ outputEvent.put(fieldName, incomingFieldEntry.getValue());
+ }
+ }
+
+ /**
+ * This method copies any fields that exist on the input event that also exist on the output event if they are not
+ * set on the output event.
+ *
+ * @param incomingEvent The incoming event to copy from
+ */
+ public void copyUnsetFields(final EnEvent incomingEvent) {
+ Assertions.argumentNotNull(incomingEvent, "incomingEvent may not be null");
+
+ for (final Entry<String, Object> incomingField : incomingEvent.entrySet()) {
+ final String fieldName = incomingField.getKey();
+
+ // Check if the field exists on the outgoing event
+ if (!outputEventDef.getParameterMap().containsKey(fieldName)) {
+ continue;
+ }
+
+ // Check if the field is set on the outgoing event
+ if (outputEvent.containsKey(fieldName)) {
+ continue;
+ }
+
+ // Now, check the fields have the same type
+ if (!incomingEvent.getAxEvent().getParameterMap().get(fieldName)
+ .equals(outputEvent.getAxEvent().getParameterMap().get(fieldName))) {
+ continue;
+ }
+
+ // All checks done, we can copy the value
+ outputEvent.put(fieldName, incomingField.getValue());
+ }
+
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.TreeSet;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.context.TaskExecutionContext;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.eventmodel.concepts.AxInputField;
+import org.onap.policy.apex.model.eventmodel.concepts.AxOutputField;
+import org.onap.policy.apex.model.policymodel.concepts.AxTask;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This abstract class executes a task in a state of an Apex policy and is specialized by classes that implement
+ * execution of task logic.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public abstract class TaskExecutor
+ implements Executor<Map<String, Object>, Map<String, Object>, AxTask, ApexInternalContext> {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(TaskExecutor.class);
+
+ // Hold the task and context definitions for this task
+ private Executor<?, ?, ?, ?> parent = null;
+ private AxTask axTask = null;
+ private ApexInternalContext internalContext = null;
+
+ // Holds the incoming and outgoing fields
+ private Map<String, Object> incomingFields = null;
+ private Map<String, Object> outgoingFields = null;
+
+ // The next task executor
+ private Executor<Map<String, Object>, Map<String, Object>, AxTask, ApexInternalContext> nextExecutor = null;
+
+ // The task execution context; contains the facades for events and context to be used by tasks executed by this task
+ // executor
+ private TaskExecutionContext executionContext = null;
+
+ /**
+ * Gets the execution internalContext.
+ *
+ * @return the execution context
+ */
+ protected TaskExecutionContext getExecutionContext() {
+ return executionContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setContext(org.onap.policy.apex.core.engine.executor.Executor,
+ * java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public void setContext(final Executor<?, ?, ?, ?> newParent, final AxTask newAxTask,
+ final ApexInternalContext newInternalContext) {
+ this.parent = newParent;
+ this.axTask = newAxTask;
+ this.internalContext = newInternalContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#prepare()
+ */
+ @Override
+ public void prepare() throws StateMachineException {
+ LOGGER.debug("prepare:" + axTask.getKey().getID() + "," + axTask.getTaskLogic().getLogicFlavour() + ","
+ + axTask.getTaskLogic().getLogic());
+ argumentNotNull(axTask.getTaskLogic().getLogic(), StateMachineException.class, "task logic cannot be null.");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#execute(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public Map<String, Object> execute(final long executionID, final Map<String, Object> newIncomingFields)
+ throws StateMachineException, ContextException {
+ throw new StateMachineException(
+ "execute() not implemented on abstract TaskExecutor class, only on its subclasses");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePre(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public final void executePre(final long executionID, final Map<String, Object> newIncomingFields)
+ throws StateMachineException, ContextException {
+ LOGGER.debug("execute-pre:" + getSubject().getTaskLogic().getLogicFlavour() + ","
+ + getSubject().getKey().getID() + "," + getSubject().getTaskLogic().getLogic());
+
+ // Check that the incoming event has all the input fields for this state
+ final Set<String> missingTaskInputFields = new TreeSet<>(axTask.getInputFields().keySet());
+ missingTaskInputFields.removeAll(newIncomingFields.keySet());
+
+ // Remove fields from the set that are optional
+ for (final Iterator<String> missingFieldIterator = missingTaskInputFields.iterator(); missingFieldIterator
+ .hasNext();) {
+ final String missingField = missingFieldIterator.next();
+ if (axTask.getInputFields().get(missingField).getOptional()) {
+ missingTaskInputFields.remove(missingField);
+ }
+ }
+ if (!missingTaskInputFields.isEmpty()) {
+ throw new StateMachineException("task input fields \"" + missingTaskInputFields
+ + "\" are missing for task \"" + axTask.getKey().getID() + "\"");
+ }
+
+ // Record the incoming fields
+ this.incomingFields = newIncomingFields;
+
+ // Initiate the outgoing fields
+ outgoingFields = new TreeMap<>();
+ for (final String outputFieldName : getSubject().getOutputFields().keySet()) {
+ outgoingFields.put(outputFieldName, null);
+ }
+
+ // Get task context object
+ executionContext =
+ new TaskExecutionContext(this, executionID, getSubject(), getIncoming(), getOutgoing(), getContext());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePost(boolean)
+ */
+ @Override
+ public final void executePost(final boolean returnValue) throws StateMachineException, ContextException {
+ if (!returnValue) {
+ String errorMessage = "execute-post: task logic execution failure on task \"" + axTask.getKey().getName()
+ + "\" in model " + internalContext.getKey().getID();
+ if (executionContext.getMessage() != null) {
+ errorMessage += ", user message: " + executionContext.getMessage();
+ }
+ LOGGER.warn(errorMessage);
+ throw new StateMachineException(errorMessage);
+ }
+
+ // Copy any unset fields from the input to the output if their data type and names are identical
+ for (final String field : axTask.getOutputFields().keySet()) {
+ // Check if the field exists and is not set on the output
+ if (!getOutgoing().containsKey(field) || getOutgoing().get(field) != null) {
+ continue;
+ }
+
+ // This field is not in the output, check if it's on the input and is the same type (Note here, the output
+ // field definition has to exist so it's not
+ // null checked)
+ final AxInputField inputFieldDef = axTask.getInputFields().get(field);
+ final AxOutputField outputFieldDef = axTask.getOutputFields().get(field);
+ if (inputFieldDef == null || !inputFieldDef.getSchema().equals(outputFieldDef.getSchema())) {
+ continue;
+ }
+
+ // We have an input field that matches our output field, copy the value across
+ getOutgoing().put(field, getIncoming().get(field));
+ }
+
+ // Finally, check that the outgoing fields have all the output fields defined for this state and, if not, output
+ // a list of missing fields
+ final Set<String> missingTaskOutputFields = new TreeSet<>(axTask.getOutputFields().keySet());
+ missingTaskOutputFields.removeAll(outgoingFields.keySet());
+
+ // Remove fields from the set that are optional
+ for (final Iterator<String> missingFieldIterator = missingTaskOutputFields.iterator(); missingFieldIterator
+ .hasNext();) {
+ final String missingField = missingFieldIterator.next();
+ if (axTask.getInputFields().get(missingField).getOptional()) {
+ missingTaskOutputFields.remove(missingField);
+ }
+ }
+ if (!missingTaskOutputFields.isEmpty()) {
+ throw new StateMachineException("task output fields \"" + missingTaskOutputFields
+ + "\" are missing for task \"" + axTask.getKey().getID() + "\"");
+ }
+
+ // Finally, check that the outgoing field map don't have any extra fields, if present, raise exception with the
+ // list of extra fields
+ final Set<String> extraTaskOutputFields = new TreeSet<>(outgoingFields.keySet());
+ extraTaskOutputFields.removeAll(axTask.getOutputFields().keySet());
+ if (!extraTaskOutputFields.isEmpty()) {
+ throw new StateMachineException("task output fields \"" + extraTaskOutputFields
+ + "\" are unwanted for task \"" + axTask.getKey().getID() + "\"");
+ }
+
+ LOGGER.debug("execute-post:" + axTask.getKey().getID() + ", returning fields " + outgoingFields.toString());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#cleanUp()
+ */
+ @Override
+ public void cleanUp() throws StateMachineException {
+ throw new StateMachineException("cleanUp() not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getKey()
+ */
+ @Override
+ public AxArtifactKey getKey() {
+ return axTask.getKey();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getParent()
+ */
+ @Override
+ public Executor<?, ?, ?, ?> getParent() {
+ return parent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getSubject()
+ */
+ @Override
+ public AxTask getSubject() {
+ return axTask;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getContext()
+ */
+ @Override
+ public ApexInternalContext getContext() {
+ return internalContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getIncoming()
+ */
+ @Override
+ public Map<String, Object> getIncoming() {
+ return incomingFields;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getOutgoing()
+ */
+ @Override
+ public Map<String, Object> getOutgoing() {
+ return outgoingFields;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setNext(org.onap.policy.apex.core.engine.executor.Executor)
+ */
+ @Override
+ public void setNext(
+ final Executor<Map<String, Object>, Map<String, Object>, AxTask, ApexInternalContext> newNextExecutor) {
+ this.nextExecutor = newNextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getNext()
+ */
+ @Override
+ public Executor<Map<String, Object>, Map<String, Object>, AxTask, ApexInternalContext> getNext() {
+ return nextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#setParameters(org.onap.policy.apex.core.engine.
+ * ExecutorParameters)
+ */
+ @Override
+ public void setParameters(final ExecutorParameters parameters) {}
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor;
+
+import static org.onap.policy.apex.model.utilities.Assertions.argumentNotNull;
+
+import org.onap.policy.apex.context.ContextException;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.context.TaskSelectionExecutionContext;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This abstract class executes a the task selection logic of a state of an Apex policy and is specialized by classes
+ * that implement execution of task selection logic.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public abstract class TaskSelectExecutor implements Executor<EnEvent, AxArtifactKey, AxState, ApexInternalContext> {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(TaskSelectExecutor.class);
+
+ // Hold the state and context definitions for this task selector
+ private Executor<?, ?, ?, ?> parent = null;
+ private AxState axState = null;
+ private ApexInternalContext context = null;
+
+ // Holds the incoming event and outgoing task keys
+ private EnEvent incomingEvent = null;
+ private AxArtifactKey outgoingTaskKey = null;
+
+ // The next task selection executor
+ private Executor<EnEvent, AxArtifactKey, AxState, ApexInternalContext> nextExecutor = null;
+
+ // The task selection execution context; contains the facades for events and context to be used by tasks executed by
+ // this task selection executor
+ private TaskSelectionExecutionContext executionContext;
+
+ /**
+ * Gets the execution context.
+ *
+ * @return the execution context
+ */
+ protected TaskSelectionExecutionContext getExecutionContext() {
+ return executionContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setContext(org.onap.policy.apex.core.engine.executor.Executor,
+ * java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public void setContext(final Executor<?, ?, ?, ?> newParent, final AxState newAxState,
+ final ApexInternalContext newContext) {
+ this.parent = newParent;
+ this.axState = newAxState;
+ this.context = newContext;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#prepare()
+ */
+ @Override
+ public void prepare() throws StateMachineException {
+ LOGGER.debug("prepare:" + axState.getKey().getID() + "," + axState.getTaskSelectionLogic().getLogicFlavour()
+ + "," + axState.getTaskSelectionLogic().getLogic());
+ argumentNotNull(axState.getTaskSelectionLogic().getLogic(), "task selection logic cannot be null.");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#execute(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public AxArtifactKey execute(final long executionID, final EnEvent newIncomingEvent)
+ throws StateMachineException, ContextException {
+ throw new StateMachineException("execute() not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePre(java.lang.long, java.lang.Object)
+ */
+ @Override
+ public final void executePre(final long executionID, final EnEvent newIncomingEvent) throws StateMachineException {
+ LOGGER.debug("execute-pre:" + axState.getKey().getID() + "," + axState.getTaskSelectionLogic().getLogicFlavour()
+ + "," + axState.getTaskSelectionLogic().getLogic());
+
+ this.incomingEvent = newIncomingEvent;
+
+ // Initialize the returned task object so it can be set
+ outgoingTaskKey = new AxArtifactKey();
+
+ // Get task selection context object
+ executionContext = new TaskSelectionExecutionContext(this, executionID, getSubject(), getIncoming(),
+ getOutgoing(), getContext());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#executePost(boolean)
+ */
+ @Override
+ public final void executePost(final boolean returnValue) throws StateMachineException {
+ if (!returnValue) {
+ String errorMessage =
+ "execute-post: task selection logic failed on state \"" + axState.getKey().getID() + "\"";
+ if (executionContext.getMessage() != null) {
+ errorMessage += ", user message: " + executionContext.getMessage();
+ }
+ LOGGER.warn(errorMessage);
+ throw new StateMachineException(errorMessage);
+ }
+
+ if (outgoingTaskKey == null || AxArtifactKey.getNullKey().getName().equals(outgoingTaskKey.getName())) {
+ outgoingTaskKey = axState.getDefaultTask();
+ LOGGER.debug("execute-post:" + axState.getKey().getID() + ", returning default task");
+ return;
+ }
+
+ if (!axState.getTaskReferences().containsKey(outgoingTaskKey)) {
+ LOGGER.error("execute-post: task \"" + outgoingTaskKey.getID()
+ + "\" returned by task selection logic not defined on state \"" + axState.getKey().getID() + "\"");
+ throw new StateMachineException("task \"" + outgoingTaskKey.getID()
+ + "\" returned by task selection logic not defined on state \"" + axState.getKey().getID() + "\"");
+ }
+
+ LOGGER.debug("execute-post:" + axState.getKey().getID() + "," + ", returning task " + outgoingTaskKey.getID());
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#cleanUp()
+ */
+ @Override
+ public void cleanUp() throws StateMachineException {
+ throw new StateMachineException("cleanUp() not implemented on class");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getKey()
+ */
+ @Override
+ public AxReferenceKey getKey() {
+ return axState.getKey();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getParent()
+ */
+ @Override
+ public Executor<?, ?, ?, ?> getParent() {
+ return parent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getSubject()
+ */
+ @Override
+ public AxState getSubject() {
+ return axState;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getContext()
+ */
+ @Override
+ public ApexInternalContext getContext() {
+ return context;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.Executor#setNext(org.onap.policy.apex.core.engine.executor.Executor)
+ */
+ @Override
+ public void setNext(final Executor<EnEvent, AxArtifactKey, AxState, ApexInternalContext> newNextExecutor) {
+ this.nextExecutor = newNextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getNext()
+ */
+ @Override
+ public Executor<EnEvent, AxArtifactKey, AxState, ApexInternalContext> getNext() {
+ return nextExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getIncoming()
+ */
+ @Override
+ public EnEvent getIncoming() {
+ return incomingEvent;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#getOutgoing()
+ */
+ @Override
+ public AxArtifactKey getOutgoing() {
+ return outgoingTaskKey;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.Executor#setParameters(org.onap.policy.apex.core.engine.
+ * ExecutorParameters)
+ */
+ @Override
+ public void setParameters(final ExecutorParameters parameters) {}
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxTasks;
+
+/**
+ * The Class AxStateFacade acts as a facade into the AxState class so that task logic can easily access information in
+ * an AxState instance.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ */
+public class AxStateFacade {
+ // CHECKSTYLE:OFF: checkstyle:visibilityModifier Logic has access to this field
+
+ /** The full definition information for the state. */
+ public AxState state;
+
+ // CHECKSTYLE:ON: checkstyle:visibilityModifier
+
+ /**
+ * Instantiates a new AxState facade.
+ *
+ * @param state the state for which a facade is being presented
+ */
+ public AxStateFacade(final AxState state) {
+ this.state = state;
+ }
+
+ /**
+ * Gets the default task key of the state.
+ *
+ * @return the default task key
+ */
+ public AxArtifactKey getDefaultTaskKey() {
+ return state.getDefaultTask();
+ }
+
+ /**
+ * Gets the ID of the state.
+ *
+ * @return the ID
+ */
+ public String getId() {
+ return state.getKey().getID();
+ }
+
+ /**
+ * Gets the name of the state.
+ *
+ * @return the state name
+ */
+ public String getStateName() {
+ return state.getKey().getLocalName();
+ }
+
+ /**
+ * Check if a task is defined for a given task name on a state and, if so, return its key.
+ *
+ * @param taskName the name of the task to get
+ * @return the task key or null if it does not exist
+ */
+ public AxArtifactKey getTaskKey(final String taskName) {
+ if (taskName == null) {
+ return null;
+ }
+
+ return ModelService.getModel(AxTasks.class).get(taskName).getKey();
+ }
+
+ /**
+ * Check if a task is defined for a given task name on a state and, if so, return its key.
+ *
+ * @return unmodifiable list of names of tasks available
+ */
+ public List<String> getTaskNames() {
+ final Set<AxArtifactKey> tasks = state.getTaskReferences().keySet();
+ final List<String> ret = new ArrayList<>(tasks.size());
+ for (final AxArtifactKey task : tasks) {
+ ret.add(task.getName());
+ }
+ return Collections.unmodifiableList(ret);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
+
+import org.onap.policy.apex.context.ContextRuntimeException;
+import org.onap.policy.apex.context.SchemaHelper;
+import org.onap.policy.apex.context.impl.schema.SchemaHelperFactory;
+import org.onap.policy.apex.core.engine.event.EnException;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineRuntimeException;
+import org.onap.policy.apex.model.eventmodel.concepts.AxField;
+import org.onap.policy.apex.model.policymodel.concepts.AxTask;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class AxTaskFacade acts as a facade into the AxTask class so that task logic can easily access information in an
+ * AxTask instance.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ */
+public class AxTaskFacade {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(AxTaskFacade.class);
+
+ // CHECKSTYLE:OFF: checkstyle:visibilityModifier Logic has access to this field
+
+ /**
+ * The full definition of the task we are presenting a facade to, executing logic has full access to the task
+ * definition.
+ */
+ public AxTask task;
+
+ // CHECKSTYLE:ON: checkstyle:visibilityModifier
+
+ /**
+ * Instantiates a new AxTask facade.
+ *
+ * @param task the task for which a facade is being presented
+ */
+ public AxTaskFacade(final AxTask task) {
+ this.task = task;
+ }
+
+ /**
+ * Gets the name of the task.
+ *
+ * @return the task name
+ */
+ public String getTaskName() {
+ return task.getKey().getName();
+ }
+
+ /**
+ * Gets the task ID.
+ *
+ * @return the task ID
+ */
+ public String getId() {
+ return task.getID();
+ }
+
+ /**
+ * Creates a schema helper for an incoming field of this task.
+ *
+ * @param fieldName The name of the field to get a schema helper for
+ * @return the schema helper for this field
+ */
+ public SchemaHelper getInFieldSchemaHelper(final String fieldName) {
+ // Find the field for the field name
+ return getFieldSchemaHelper(fieldName, task.getInputFields().get(fieldName), "incoming");
+ }
+
+ /**
+ * Creates a schema helper for an outgoing field of this task.
+ *
+ * @param fieldName The name of the field to get a schema helper for
+ * @return the schema helper for this field
+ */
+ public SchemaHelper getOutFieldSchemaHelper(final String fieldName) {
+ // Find the field for the field name
+ return getFieldSchemaHelper(fieldName, task.getOutputFields().get(fieldName), "outgoing");
+ }
+
+ /**
+ * Creates a schema helper for an incoming field of this task.
+ *
+ * @param fieldName The name of the field to get a schema helper for
+ * @param field the field
+ * @param directionString the direction string
+ * @return the schema helper for this field
+ */
+ private SchemaHelper getFieldSchemaHelper(final String fieldName, final AxField field,
+ final String directionString) {
+ // Find the field for the field name
+ if (field == null) {
+ final String message = "no " + directionString + " field with name \"" + fieldName + "\" defined on task \""
+ + task.getID() + "\"";
+ LOGGER.warn(message);
+ throw new StateMachineRuntimeException(message);
+ }
+
+ // Get a schema helper to handle translations of fields to and from the schema
+ try {
+ return new SchemaHelperFactory().createSchemaHelper(field.getKey(), field.getSchema());
+ } catch (final ContextRuntimeException e) {
+ final String message = "schema helper cannot be created for task field \"" + fieldName + "\" with key \""
+ + field.getID() + "\" with schema \"" + field.getSchema() + "\"";
+ LOGGER.warn(message, e);
+ throw new EnException(message, e);
+ }
+ }
+
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.ContextAlbum;
+import org.onap.policy.apex.context.ContextRuntimeException;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.Executor;
+import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * Container class for the execution context for state finalizer logic executions in a state being executed in an Apex
+ * engine. The state finalizer must have easy access to the state definition, the fields, as well as the policy, global,
+ * and external context.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ */
+public class StateFinalizerExecutionContext {
+ /**
+ * Logger for state finalizer execution, state finalizer logic can use this field to access and log to Apex logging.
+ */
+ private static final XLogger EXCEUTION_LOGGER =
+ XLoggerFactory.getXLogger("org.onap.policy.apex.executionlogging.StateFinalizerExecutionLogging");
+
+ // CHECKSTYLE:OFF: checkstyle:VisibilityModifier Logic has access to these field
+
+ /** A facade to the full state definition for the state finalizer logic being executed. */
+ public final AxStateFacade subject;
+
+ /** the execution ID for the current APEX policy execution instance. */
+ public final Long executionID;
+
+ /**
+ * The list of state outputs for this state finalizer. The purpose of a state finalizer is to select a state output
+ * for a state from this list of state output names.
+ */
+ public final Set<String> stateOutputNames;
+
+ /**
+ * The fields of this state finalizer. A state finalizer receives this list of fields from a task and may use these
+ * fields to determine what state output to select. Once a state finalizer has selected a state output, it must
+ * marshal these fields so that they match the fields required for the event defined in the state output.
+ */
+ public Map<String, Object> fields;
+
+ // A message specified in the logic
+ private String message;
+
+ /**
+ * The state output that the state finalizer logic has selected for a state. The state finalizer logic sets this
+ * field in its logic after executing and the Apex engine uses this state output for this state.
+ */
+ private String selectedStateOutputName;
+
+ /**
+ * Logger for state finalizer execution, state finalizer logic can use this field to access and log to Apex logging.
+ */
+ public final XLogger logger = EXCEUTION_LOGGER;
+
+ // CHECKSTYLE:ON: checkstyle:visibilityModifier
+
+ // All available context albums
+ private final Map<String, ContextAlbum> context;
+
+ /**
+ * Instantiates a new state finalizer execution context.
+ *
+ * @param stateFinalizerExecutor the state finalizer executor that requires context
+ * @param executionID the execution ID for the current APEX policy execution instance
+ * @param axState the state definition that is the subject of execution
+ * @param fields the fields to be manipulated by the state finalizer
+ * @param stateOutputNames the state output names, one of which will be selected by the state finalizer
+ * @param internalContext the execution context of the Apex engine in which the task is being executed
+ */
+ public StateFinalizerExecutionContext(final StateFinalizerExecutor stateFinalizerExecutor, final long executionID,
+ final AxState axState, final Map<String, Object> fields, final Set<String> stateOutputNames,
+ final ApexInternalContext internalContext) {
+ subject = new AxStateFacade(axState);
+
+ // Execution ID is the current policy execution instance
+ this.executionID = executionID;
+
+ this.fields = fields;
+ this.stateOutputNames = stateOutputNames;
+
+ // Set up the context albums for this task
+ context = new TreeMap<>();
+ for (final AxArtifactKey mapKey : subject.state.getContextAlbumReferences()) {
+ context.put(mapKey.getName(), internalContext.getContextAlbums().get(mapKey));
+ }
+
+ // Get the artifact stack of the users of the policy
+ final List<AxConcept> usedArtifactStack = new ArrayList<>();
+ for (Executor<?, ?, ?, ?> parent = stateFinalizerExecutor.getParent(); parent != null; parent =
+ parent.getParent()) {
+ // Add each parent to the top of the stack
+ usedArtifactStack.add(0, parent.getKey());
+ }
+
+ // Change the stack to an array
+ final AxConcept[] usedArtifactStackArray = usedArtifactStack.toArray(new AxConcept[usedArtifactStack.size()]);
+
+ // Set the user of the context
+ // Set the user of the context
+ for (final ContextAlbum contextAlbum : context.values()) {
+ contextAlbum.setUserArtifactStack(usedArtifactStackArray);
+ }
+ }
+
+ /**
+ * Return a context album if it exists in the context definition of this state.
+ *
+ * @param contextAlbumName The context album name
+ * @return The context album
+ * @throws ContextRuntimeException if the context album does not exist on the state for this executor
+ */
+ public ContextAlbum getContextAlbum(final String contextAlbumName) throws ContextRuntimeException {
+ // Find the context album
+ final ContextAlbum foundContextAlbum = context.get(contextAlbumName);
+
+ // Check if the context album exists
+ if (foundContextAlbum != null) {
+ return foundContextAlbum;
+ } else {
+ throw new ContextRuntimeException("cannot find definition of context album \"" + contextAlbumName
+ + "\" on state \"" + subject.getId() + "\"");
+ }
+ }
+
+ /**
+ * Return the state output name selected by the state finalizer logic.
+ *
+ * @return the state output name
+ */
+ public String getSelectedStateOutputName() {
+ return selectedStateOutputName;
+ }
+
+ /**
+ * Set the state output name selected by the state finalizer logic.
+ *
+ * @param selectedStateOutputName the state output name
+ */
+ public void setSelectedStateOutputName(final String selectedStateOutputName) {
+ this.selectedStateOutputName = selectedStateOutputName;
+ }
+
+ /**
+ * Gets the user message.
+ *
+ * @return the user message
+ */
+ public String getMessage() {
+ return message;
+ }
+
+ /**
+ * Sets the user message.
+ *
+ * @param message the message
+ */
+ public void setMessage(final String message) {
+ this.message = message;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.ContextAlbum;
+import org.onap.policy.apex.context.ContextRuntimeException;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.Executor;
+import org.onap.policy.apex.core.engine.executor.TaskExecutor;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+import org.onap.policy.apex.model.policymodel.concepts.AxTask;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * Container class for the execution context for Task logic executions in a task being executed in an Apex engine. The
+ * task must have easy access to the task definition, the incoming and outgoing field contexts, as well as the policy,
+ * global, and external context.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ */
+public class TaskExecutionContext {
+ // Logger for task execution
+ private static final XLogger EXECUTION_LOGGER =
+ XLoggerFactory.getXLogger("org.onap.policy.apex.executionlogging.TaskExecutionLogging");
+
+ // CHECKSTYLE:OFF: checkstyle:VisibilityModifier Logic has access to these field
+
+ /** A constant <code>boolean true</code> value available for reuse e.g., for the return value */
+ public final Boolean TRUE = true;
+
+ /** A constant <code>boolean false</code> value available for reuse e.g., for the return value */
+ public final Boolean FALSE = false;
+
+ /** A facade to the full task definition for the task logic being executed. */
+ public final AxTaskFacade subject;
+
+ /** the execution ID for the current APEX policy execution instance. */
+ public final Long executionID;
+
+ /**
+ * The incoming fields from the trigger event for the task. The task logic can access these fields when executing
+ * its logic.
+ */
+ public final Map<String, Object> inFields;
+
+ /**
+ * The outgoing fields from the task. The task logic can access and set these fields with its logic. A task outputs
+ * its result using these fields.
+ */
+ public final Map<String, Object> outFields;
+
+ /** Logger for task execution, task logic can use this field to access and log to Apex logging. */
+ public final XLogger logger = EXECUTION_LOGGER;
+
+ // CHECKSTYLE:ON: checkstyle:VisibilityModifier
+
+ // All available context albums
+ private final Map<String, ContextAlbum> context;
+
+ // The artifact stack of users of this context
+ private final List<AxConcept> usedArtifactStack;
+
+ // A message specified in the logic
+ private String message;
+
+ /**
+ * Instantiates a new task execution context.
+ *
+ * @param taskExecutor the task executor that requires context
+ * @param executionID the execution ID for the current APEX policy execution instance
+ * @param axTask the task definition that is the subject of execution
+ * @param inFields the in fields
+ * @param outFields the out fields
+ * @param internalContext the execution context of the Apex engine in which the task is being executed
+ */
+ public TaskExecutionContext(final TaskExecutor taskExecutor, final long executionID, final AxTask axTask,
+ final Map<String, Object> inFields, final Map<String, Object> outFields,
+ final ApexInternalContext internalContext) {
+ // The subject is the task definition
+ subject = new AxTaskFacade(axTask);
+
+ // Execution ID is the current policy execution instance
+ this.executionID = executionID;
+
+ // The input and output fields
+ this.inFields = Collections.unmodifiableMap(inFields);
+ this.outFields = outFields;
+
+ // Set up the context albums for this task
+ context = new TreeMap<>();
+ for (final AxArtifactKey mapKey : subject.task.getContextAlbumReferences()) {
+ context.put(mapKey.getName(), internalContext.getContextAlbums().get(mapKey));
+ }
+
+ // Get the artifact stack of the users of the policy
+ usedArtifactStack = new ArrayList<>();
+ for (Executor<?, ?, ?, ?> parent = taskExecutor.getParent(); parent != null; parent = parent.getParent()) {
+ // Add each parent to the top of the stack
+ usedArtifactStack.add(0, parent.getKey());
+ }
+
+ // Change the stack to an array
+ final AxConcept[] usedArtifactStackArray = usedArtifactStack.toArray(new AxConcept[usedArtifactStack.size()]);
+
+ // Set the user of the context
+ for (final ContextAlbum contextAlbum : context.values()) {
+ contextAlbum.setUserArtifactStack(usedArtifactStackArray);
+ }
+ }
+
+ /**
+ * Return a context album if it exists in the context definition of this task.
+ *
+ * @param contextAlbumName The context album name
+ * @return The context album
+ * @throws ContextRuntimeException if the context album does not exist on the task for this executor
+ */
+ public ContextAlbum getContextAlbum(final String contextAlbumName) throws ContextRuntimeException {
+ // Find the context album
+ final ContextAlbum foundContextAlbum = context.get(contextAlbumName);
+
+ // Check if the context album exists
+ if (foundContextAlbum != null) {
+ return foundContextAlbum;
+ } else {
+ throw new ContextRuntimeException("cannot find definition of context album \"" + contextAlbumName
+ + "\" on task \"" + subject.getId() + "\"");
+ }
+ }
+
+ /**
+ * Get the user message.
+ *
+ * @return the user message
+ */
+ public String getMessage() {
+ return message;
+ }
+
+ /**
+ * Sets the user message.
+ *
+ * @param message the message
+ */
+ public void setMessage(final String message) {
+ this.message = message;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.context.ContextAlbum;
+import org.onap.policy.apex.context.ContextRuntimeException;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.Executor;
+import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * Container class for the execution context for Task Selection logic executions in a task being executed in an Apex
+ * engine. The task must have easy access to the state definition, the incoming and outgoing event contexts, as well as
+ * the policy, global, and external context.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ */
+public class TaskSelectionExecutionContext {
+ // Logger for task execution
+ private static final XLogger EXECUTION_LOGGER =
+ XLoggerFactory.getXLogger("org.onap.policy.apex.executionlogging.TaskSelectionExecutionLogging");
+
+ // CHECKSTYLE:OFF: checkstyle:VisibilityModifier Logic has access to these field
+
+ /** A constant <code>boolean true</code> value available for reuse e.g., for the return value */
+ public final Boolean TRUE = true;
+
+ /** A constant <code>boolean false</code> value available for reuse e.g., for the return value */
+ public final Boolean FALSE = false;
+
+ /** A facade to the full state definition for the task selection logic being executed. */
+ public final AxStateFacade subject;
+
+ /** the execution ID for the current APEX policy execution instance. */
+ public final Long executionID;
+
+ /**
+ * The incoming fields from the trigger event for the state. The task selection logic can access these fields to
+ * decide what task to select for the state.
+ */
+ public final Map<String, Object> inFields;
+
+ /**
+ * The task that the task selection logic has selected for a state. The task selection logic sets this field in its
+ * logic prior to executing and the Apex engine executes this task as the task for this state.
+ */
+ public final AxArtifactKey selectedTask;
+
+ /**
+ * Logger for task selection execution, task selection logic can use this field to access and log to Apex logging.
+ */
+ public final XLogger logger = EXECUTION_LOGGER;
+
+ // CHECKSTYLE:ON: checkstyle:VisibilityModifier
+
+ // All available context albums
+ private final Map<String, ContextAlbum> context;
+
+ // A message specified in the logic
+ private String message;
+
+ /**
+ * Instantiates a new task selection execution context.
+ *
+ * @param taskSelectExecutor the task selection executor that requires context
+ * @param executionID the execution identifier
+ * @param axState the state definition that is the subject of execution
+ * @param incomingEvent the incoming event for the state
+ * @param outgoingKey the outgoing key for the task to execute in this state
+ * @param internalContext the execution context of the Apex engine in which the task is being executed
+ */
+ public TaskSelectionExecutionContext(final TaskSelectExecutor taskSelectExecutor, final long executionID,
+ final AxState axState, final EnEvent incomingEvent, final AxArtifactKey outgoingKey,
+ final ApexInternalContext internalContext) {
+ // The subject is the state definition
+ subject = new AxStateFacade(axState);
+
+ // Execution ID is the current policy execution instance
+ this.executionID = executionID;
+
+ // The events
+ inFields = incomingEvent;
+ selectedTask = outgoingKey;
+
+ // Set up the context albums for this task
+ // Set up the context albums for this task
+ context = new TreeMap<>();
+ for (final AxArtifactKey mapKey : subject.state.getContextAlbumReferences()) {
+ context.put(mapKey.getName(), internalContext.getContextAlbums().get(mapKey));
+ }
+
+ // Get the artifact stack of the users of the policy
+ final List<AxConcept> usedArtifactStack = new ArrayList<>();
+ for (Executor<?, ?, ?, ?> parent = taskSelectExecutor.getParent(); parent != null; parent =
+ parent.getParent()) {
+ // Add each parent to the top of the stack
+ usedArtifactStack.add(0, parent.getKey());
+ }
+
+ // Add the events to the artifact stack
+ usedArtifactStack.add(incomingEvent.getKey());
+
+ // Change the stack to an array
+ final AxConcept[] usedArtifactStackArray = usedArtifactStack.toArray(new AxConcept[usedArtifactStack.size()]);
+
+ // Set the user of the context
+ // Set the user of the context
+ for (final ContextAlbum contextAlbum : context.values()) {
+ contextAlbum.setUserArtifactStack(usedArtifactStackArray);
+ }
+ incomingEvent.setUserArtifactStack(usedArtifactStackArray);
+ }
+
+ /**
+ * Return a context album if it exists in the context definition of this state.
+ *
+ * @param contextAlbumName The context album name
+ * @return The context albumxxxxxx
+ * @throws ContextRuntimeException if the context album does not exist on the state for this executor
+ */
+ public ContextAlbum getContextAlbum(final String contextAlbumName) throws ContextRuntimeException {
+ // Find the context album
+ final ContextAlbum foundContextAlbum = context.get(contextAlbumName);
+
+ // Check if the context album exists
+ if (foundContextAlbum != null) {
+ return foundContextAlbum;
+ } else {
+ throw new ContextRuntimeException("cannot find definition of context album \"" + contextAlbumName
+ + "\" on state \"" + subject.getId() + "\"");
+ }
+ }
+
+ /**
+ * Gets the user message.
+ *
+ * @return the user message
+ */
+ public String getMessage() {
+ return message;
+ }
+
+ /**
+ * Sets the user message.
+ *
+ * @param message the message
+ */
+ public void setMessage(final String message) {
+ this.message = message;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides context and facades for executing tasks, task selection logic, and state finalizer logic. The public fields
+ * and methods of {@link TaskExecutionContext}, {@link TaskSelectionExecutionContext} and
+ * {@link StateFinalizerExecutionContext} are available to task logic, task selection logic, and state finalizer logic
+ * respectively when that logic is executing in an executor plugin under the control of an APEX engine.
+ *
+ * The {@link AxStateFacade} and {@link AxTaskFacade} classes provide facades and convenience methods for state and task
+ * definition information for logic at execution time.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.exception;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+
+/**
+ * This class will be called if an error occurs in an Apex state machine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StateMachineException extends ApexException {
+ private static final long serialVersionUID = -4245694568321686450L;
+
+ /**
+ * Instantiates a new state machine exception.
+ *
+ * @param message the message
+ */
+ public StateMachineException(final String message) {
+ super(message);
+ }
+
+ /**
+ * Instantiates a new state machine exception.
+ *
+ * @param message the message
+ * @param e the e
+ */
+ public StateMachineException(final String message, final Exception e) {
+ super(message, e);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.exception;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexRuntimeException;
+
+/**
+ * This class will be called if a runtime error occurs in an Apex state machine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StateMachineRuntimeException extends ApexRuntimeException {
+ private static final long serialVersionUID = -4245694568321686450L;
+
+ /**
+ * Instantiates a new state machine exception.
+ *
+ * @param message the message
+ */
+ public StateMachineRuntimeException(final String message) {
+ super(message);
+ }
+
+ /**
+ * Instantiates a new state machine exception.
+ *
+ * @param message the message
+ * @param e the e
+ */
+ public StateMachineRuntimeException(final String message, final Exception e) {
+ super(message, e);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Contains exceptions that may be thrown during execution of an APEX engine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.executor.exception;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.impl;
+
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
+
+import org.onap.policy.apex.core.engine.EngineParameters;
+import org.onap.policy.apex.core.engine.ExecutorParameters;
+import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.Executor;
+import org.onap.policy.apex.core.engine.executor.ExecutorFactory;
+import org.onap.policy.apex.core.engine.executor.StateFinalizerExecutor;
+import org.onap.policy.apex.core.engine.executor.TaskExecutor;
+import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineRuntimeException;
+import org.onap.policy.apex.model.basicmodel.service.ParameterService;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxStateFinalizerLogic;
+import org.onap.policy.apex.model.policymodel.concepts.AxTask;
+import org.onap.policy.apex.model.utilities.Assertions;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class ExecutorFactoryImpl is a factory class that returns task selection logic and task logic executors depending
+ * on the type of logic executor has been specified for the task selection logic in a state or task logic in a task.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ExecutorFactoryImpl extends ExecutorFactory {
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(ExecutorFactoryImpl.class);
+
+ // A map of logic flavours mapped to executor classes for plugins to executors for those logic flavours
+ private Map<String, Class<Executor<?, ?, ?, ?>>> taskExecutorPluginClassMap =
+ new TreeMap<String, Class<Executor<?, ?, ?, ?>>>();
+ private Map<String, Class<Executor<?, ?, ?, ?>>> taskSelectionExecutorPluginClassMap =
+ new TreeMap<String, Class<Executor<?, ?, ?, ?>>>();
+ private Map<String, Class<Executor<?, ?, ?, ?>>> stateFinalizerExecutorPluginClassMap =
+ new TreeMap<String, Class<Executor<?, ?, ?, ?>>>();
+
+ // A map of parameters for executors
+ private final Map<String, ExecutorParameters> implementationParameterMap =
+ new TreeMap<String, ExecutorParameters>();
+
+ /**
+ * Constructor, builds the class map for executors.
+ *
+ * @throws StateMachineException on plugin creation errors
+ */
+ public ExecutorFactoryImpl() throws StateMachineException {
+ final EngineParameters engineParameters = ParameterService.getParameters(EngineParameters.class);
+
+ Assertions.argumentNotNull(engineParameters, StateMachineException.class,
+ "Parameter \"engineParameters\" may not be null");
+
+ // Instantiate each executor class map entry
+ for (final Entry<String, ExecutorParameters> executorParameterEntry : engineParameters.getExecutorParameterMap()
+ .entrySet()) {
+ // Get classes for all types of executors for this logic type
+ taskExecutorPluginClassMap.put(executorParameterEntry.getKey(),
+ getExecutorPluginClass(executorParameterEntry.getValue().getTaskExecutorPluginClass()));
+ taskSelectionExecutorPluginClassMap.put(executorParameterEntry.getKey(),
+ getExecutorPluginClass(executorParameterEntry.getValue().getTaskSelectionExecutorPluginClass()));
+ stateFinalizerExecutorPluginClassMap.put(executorParameterEntry.getKey(),
+ getExecutorPluginClass(executorParameterEntry.getValue().getStateFinalizerExecutorPluginClass()));
+
+ // Save the executor implementation parameters
+ implementationParameterMap.put(executorParameterEntry.getKey(), executorParameterEntry.getValue());
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.ExecutorFactory#getTaskSelectionExecutor(org.onap.policy.apex.core.
+ * model. concepts.AxState, org.onap.policy.apex.core.engine.context.Context)
+ */
+ @Override
+ public TaskSelectExecutor getTaskSelectionExecutor(final Executor<?, ?, ?, ?> parentExecutor, final AxState state,
+ final ApexInternalContext context) {
+ if (!state.checkSetTaskSelectionLogic()) {
+ return null;
+ }
+
+ // Create task selection executor
+ final TaskSelectExecutor tsExecutor =
+ (TaskSelectExecutor) createExecutor(state.getTaskSelectionLogic().getLogicFlavour(),
+ taskSelectionExecutorPluginClassMap.get(state.getTaskSelectionLogic().getLogicFlavour()),
+ TaskSelectExecutor.class);
+ tsExecutor.setParameters(implementationParameterMap.get(state.getTaskSelectionLogic().getLogicFlavour()));
+ tsExecutor.setContext(parentExecutor, state, context);
+
+ return tsExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.engine.executor.ExecutorFactory#getTaskExecutor(org.onap.policy.apex.core.model.
+ * concepts. AxTask, org.onap.policy.apex.core.engine.context.Context)
+ */
+ @Override
+ public TaskExecutor getTaskExecutor(final Executor<?, ?, ?, ?> parentExecutor, final AxTask task,
+ final ApexInternalContext context) {
+ // Create task executor
+ final TaskExecutor taskExecutor = (TaskExecutor) createExecutor(task.getTaskLogic().getLogicFlavour(),
+ taskExecutorPluginClassMap.get(task.getTaskLogic().getLogicFlavour()), TaskExecutor.class);
+ taskExecutor.setParameters(implementationParameterMap.get(task.getTaskLogic().getLogicFlavour()));
+ taskExecutor.setContext(parentExecutor, task, context);
+
+ return taskExecutor;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.engine.executor.ExecutorFactory#getStateFinalizerExecutor(org.onap.policy.apex.core.
+ * engine. executor.Executor, org.onap.policy.apex.core.policymodel.concepts.AxStateFinalizerLogic,
+ * org.onap.policy.apex.core.engine.context.ApexInternalContext)
+ */
+ @Override
+ public StateFinalizerExecutor getStateFinalizerExecutor(final Executor<?, ?, ?, ?> parentExecutor,
+ final AxStateFinalizerLogic logic, final ApexInternalContext context) {
+ // Create state finalizer executor
+ final StateFinalizerExecutor sfExecutor = (StateFinalizerExecutor) createExecutor(logic.getLogicFlavour(),
+ stateFinalizerExecutorPluginClassMap.get(logic.getLogicFlavour()), StateFinalizerExecutor.class);
+ sfExecutor.setParameters(implementationParameterMap.get(logic.getLogicFlavour()));
+ sfExecutor.setContext(parentExecutor, logic, context);
+
+ return sfExecutor;
+ }
+
+ /**
+ * Get an executor class for a given executor plugin class name.
+ *
+ * @param executorClassName The name of the executor plugin class
+ * @return an executor class
+ * @throws StateMachineException on plugin instantiation errors
+ */
+ @SuppressWarnings("unchecked")
+ private Class<Executor<?, ?, ?, ?>> getExecutorPluginClass(final String executorClassName)
+ throws StateMachineException {
+ // It's OK for an executor class not to be defined as long as it's not called
+ if (executorClassName == null) {
+ return null;
+ }
+
+ // Get the class for the executor using reflection
+ Class<? extends Object> executorPluginClass = null;
+ try {
+ executorPluginClass = Class.forName(executorClassName);
+ } catch (final ClassNotFoundException e) {
+ LOGGER.error("Apex executor class not found for executor plugin \"" + executorClassName + "\"", e);
+ throw new StateMachineException(
+ "Apex executor class not found for executor plugin \"" + executorClassName + "\"", e);
+ }
+
+ // Check the class is an executor
+ if (!Executor.class.isAssignableFrom(executorPluginClass)) {
+ LOGGER.error("Specified Apex executor plugin class \"" + executorClassName
+ + "\" does not implment the Executor interface");
+ throw new StateMachineException("Specified Apex executor plugin class \"" + executorClassName
+ + "\" does not implment the Executor interface");
+ }
+
+ return (Class<Executor<?, ?, ?, ?>>) executorPluginClass;
+ }
+
+ /**
+ * Get an instance of an executor plugin class of the specified type and super type.
+ *
+ * @param logicFlavour The logic flavour of the logic
+ * @param executorClass The sub-class of the executor type to be instantiated
+ * @param executorSuperClass The super type of the class of executor to be instantiated
+ * @return The instantiated class
+ */
+ private Executor<?, ?, ?, ?> createExecutor(final String logicFlavour,
+ final Class<Executor<?, ?, ?, ?>> executorClass,
+ final Class<? extends Executor<?, ?, ?, ?>> executorSuperClass) {
+ // It's OK for an executor class not to be defined but it's not all right to try and create a non-defined
+ // executor class
+ if (executorClass == null) {
+ final String errorMessage = "Executor plugin class not defined for \"" + logicFlavour
+ + "\" executor of type \"" + executorSuperClass.getCanonicalName() + "\"";
+ LOGGER.error(errorMessage);
+ throw new StateMachineRuntimeException(errorMessage);
+ }
+
+ // Create an executor for the specified logic flavour
+ Object executorObject = null;
+ try {
+ executorObject = executorClass.newInstance();
+ } catch (InstantiationException | IllegalAccessException e) {
+ final String errorMessage = "Instantiation error on \"" + logicFlavour + "\" executor of type \""
+ + executorClass.getCanonicalName() + "\"";
+ LOGGER.error(errorMessage, e);
+ throw new StateMachineRuntimeException(errorMessage, e);
+ }
+
+ // Check the class is a Task Selection Executor
+ if (!(executorSuperClass.isAssignableFrom(executorObject.getClass()))) {
+ final String errorMessage = "Executor on \"" + logicFlavour + "\" of type \"" + executorClass
+ + "\" is not an instance of \"" + executorSuperClass.getCanonicalName() + "\"";
+
+ LOGGER.error(errorMessage);
+ throw new StateMachineRuntimeException(errorMessage);
+ }
+
+ return (Executor<?, ?, ?, ?>) executorObject;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Contains factories for creating executors for tasks, state fianlizers, and task selectors.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.executor.impl;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Implements state, task, task selection, and state finalizer execution for the APEX engine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.executor;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.monitoring;
+
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.eventmodel.concepts.AxField;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class is used to monitor event parameter gets and sets.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EventMonitor {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(EventMonitor.class);
+
+ /**
+ * Monitor get on an event parameter.
+ *
+ * @param eventParameter The event parameter to monitor
+ * @param value the value of the event parameter
+ * @param userArtifactStack the keys of the artifacts using the event at the moment
+ */
+ public void monitorGet(final AxField eventParameter, final Object value, final AxConcept[] userArtifactStack) {
+ LOGGER.trace(monitor("GET", userArtifactStack, eventParameter, value));
+ }
+
+ /**
+ * Monitor set on an event parameter.
+ *
+ * @param eventParameter The event parameter to monitor
+ * @param value the value of the event parameter
+ * @param userArtifactStack the keys of the artifacts using the event at the moment
+ */
+ public void monitorSet(final AxField eventParameter, final Object value, final AxConcept[] userArtifactStack) {
+ LOGGER.trace(monitor("SET", userArtifactStack, eventParameter, value));
+ }
+
+ /**
+ * Monitor remove on an event parameter.
+ *
+ * @param eventParameter The event parameter to monitor
+ * @param removedValue the value of the event parameter
+ * @param userArtifactStack the keys of the artifacts using the event at the moment
+ */
+ public void monitorRemove(final AxField eventParameter, final Object removedValue,
+ final AxConcept[] userArtifactStack) {
+ LOGGER.trace(monitor("REMOVE", userArtifactStack, eventParameter, removedValue));
+ }
+
+ /**
+ * Monitor the user artifact stack.
+ *
+ * @param preamble the preamble
+ * @param userArtifactStack The user stack to print
+ * @param eventParameter The event parameter that we are monitoring
+ * @param value The value of the target object
+ * @return the string
+ */
+ private String monitor(final String preamble, final AxConcept[] userArtifactStack, final AxField eventParameter,
+ final Object value) {
+ final StringBuilder builder = new StringBuilder();
+
+ builder.append(preamble);
+ builder.append(",[");
+
+ if (userArtifactStack != null) {
+ boolean first = true;
+ for (final AxConcept stackKey : userArtifactStack) {
+ if (first) {
+ first = false;
+ } else {
+ builder.append(',');
+ }
+ if (stackKey instanceof AxArtifactKey) {
+ builder.append(((AxArtifactKey) stackKey).getID());
+ } else if (stackKey instanceof AxReferenceKey) {
+ builder.append(((AxReferenceKey) stackKey).getID());
+ } else {
+ builder.append(stackKey.toString());
+ }
+ }
+ }
+ builder.append("],");
+
+ builder.append(eventParameter.toString());
+ builder.append("=");
+ builder.append(value);
+
+ return builder.toString();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides monitoring of APEX policy execution. It monitors events as they trigger Apex policies, pass between the
+ * various states of a policy, and are emitted by a policy.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine.monitoring;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the core engine implementation for Apex. It builds a state machine for execution for each policy in its
+ * policy model. It provides the infrastructure for running policies and their states, for running executors provided by
+ * executor plugins, for supplying events and context to running policies, states, and tasks, and for handling event
+ * transmission into and out of policies and between states in policies.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.engine;
--- /dev/null
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core</artifactId>
+ <version>2.0.0-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>core-infrastructure</artifactId>
+ <name>${project.artifactId}</name>
+ <description>Common non-functional components for Apex</description>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.java-websocket</groupId>
+ <artifactId>Java-WebSocket</artifactId>
+ <version>1.3.4</version>
+ </dependency>
+ <dependency>
+ <groupId>com.google.guava</groupId>
+ <artifactId>guava</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>com.google.code.gson</groupId>
+ <artifactId>gson</artifactId>
+ </dependency>
+ </dependencies>
+</project>
\ No newline at end of file
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.java;
+
+/**
+ * This class will be called if an error occurs in Java handling.
+ *
+ * @author Liam Fallon
+ */
+public class JavaHandlingException extends Exception {
+ private static final long serialVersionUID = -6375859029774312663L;
+
+ /**
+ * Instantiates a new Java handling exception.
+ *
+ * @param message the message
+ */
+ public JavaHandlingException(final String message) {
+ super(message);
+ }
+
+ /**
+ * Instantiates a new Java handling exception.
+ *
+ * @param e the exception to wrap
+ */
+ public JavaHandlingException(final Exception e) {
+ super(e);
+ }
+
+ /**
+ * Instantiates a new Java handling exception.
+ *
+ * @param message the message
+ * @param e the exception to wrap
+ */
+ public JavaHandlingException(final String message, final Exception e) {
+ super(message, e);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.java.classes;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.Arrays;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class is a utility class used to find Java classes on the class path, in directories, and in Jar files.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public abstract class ClassUtils {
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(ClassUtils.class);
+
+ // The boot directory in Java for predefined JARs
+ private static final String SUN_BOOT_LIBRARY_PATH = "sun.boot.library.path";
+
+ // Token for Classes directory in paths
+ private static final String CLASSES_TOKEN = "/classes/";
+
+ // Token for library fragment in path
+ private static final String LIBRARAY_PATH_TOKEN = "/lib";
+
+ /**
+ * Private constructor used to prevent sub class instantiation.
+ */
+ private ClassUtils() {}
+
+ /**
+ * Get the class names of all classes on the class path. WARNING: This is a heavy call, use sparingly
+ *
+ * @return a set of class names for all classes in the class path
+ */
+ public static Set<String> getClassNames() {
+ // The return set of class names
+ final Set<String> classNameSet = new TreeSet<>();
+
+ try {
+ // The library path for predefined classes in Java
+ String sunBootLibraryPathString = System.getProperty(SUN_BOOT_LIBRARY_PATH);
+
+ // Check it exists and has a "lib" in it
+ if (sunBootLibraryPathString != null && sunBootLibraryPathString.contains(LIBRARAY_PATH_TOKEN)) {
+ // Strip any superfluous trailer from path
+ sunBootLibraryPathString = sunBootLibraryPathString.substring(0,
+ sunBootLibraryPathString.lastIndexOf(LIBRARAY_PATH_TOKEN) + LIBRARAY_PATH_TOKEN.length());
+
+ final File bootLibraryFile = new File(sunBootLibraryPathString);
+ // The set used to hold class names is populated with predefined Java classes
+ classNameSet.addAll(processDir(bootLibraryFile, ""));
+ }
+
+ // Get the entries on the class path
+ URL[] urls = ((URLClassLoader) ClassLoader.getSystemClassLoader()).getURLs();
+
+ // Try get the classes in the bootstrap loader
+ try {
+ final Class<?> nullclassloader = Class.forName("sun.misc.Launcher");
+ if (nullclassloader != null) {
+ // There a long way and a short way, Short way: causes a warning that cannot be suppressed
+ // URL[] moreurls = sun.misc.Launcher.getBootstrapClassPath().getURLs();
+ // long way:
+ Method m = nullclassloader.getMethod("getBootstrapClassPath");
+ if (m != null) {
+ final Object cp = m.invoke(null, (Object[]) null);
+ if (cp != null) {
+ m = cp.getClass().getMethod("getURLs");
+ if (m != null) {
+ final URL[] moreurls = (URL[]) (m.invoke(cp, (Object[]) null));
+ if (moreurls != null && moreurls.length > 0) {
+ if (urls.length == 0) {
+ urls = moreurls;
+ } else {
+ final URL[] result = Arrays.copyOf(urls, urls.length + moreurls.length);
+ System.arraycopy(moreurls, 0, result, urls.length, moreurls.length);
+ urls = result;
+ }
+ }
+ }
+ }
+ }
+ // end long way!
+ }
+ } catch (final ClassNotFoundException e) {
+ LOGGER.warn("Failed to find default path for JRE libraries", e);
+ }
+
+ // Iterate over the class path entries
+ for (final URL url : urls) {
+ if (url == null || url.getFile() == null) {
+ continue;
+ }
+ final File urlFile = new File(url.getFile());
+ // Directories may contain ".class" files
+ if (urlFile.isDirectory()) {
+ classNameSet.addAll(processDir(urlFile, url.getFile()));
+ }
+ // JARs are processed as well
+ else if (url.getFile().endsWith(".jar")) {
+ classNameSet.addAll(processJar(urlFile));
+ } else {
+ // It's a resource or some other non-executable thing
+ continue;
+ }
+ }
+ } catch (final Exception e) {
+ LOGGER.warn("could not get the names of Java classes", e);
+ }
+
+ return classNameSet;
+ }
+
+ /**
+ * Find all classes in directories and JARs in those directories.
+ *
+ * @param classDirectory The directory to search for classes
+ * @param rootDir The root directory, to be removed from absolute paths
+ * @return a set of classes which may be empty
+ * @throws Exception on errors processing directories
+ */
+ public static Set<String> processDir(final File classDirectory, final String rootDir) throws Exception {
+ // The return set
+ final TreeSet<String> classNameSet = new TreeSet<>();
+
+ // Iterate over the directory
+ if (classDirectory == null || !classDirectory.isDirectory()) {
+ return classNameSet;
+ }
+ for (final File child : classDirectory.listFiles()) {
+ if (child.isDirectory()) {
+ // Recurse down
+ classNameSet.addAll(processDir(child, rootDir));
+ } else if (child.getName().endsWith(".jar")) {
+ // Process the JAR
+ classNameSet.addAll(processJar(child));
+ } else if (child.getName().endsWith(".class") && !child.getName().contains("$")) {
+ // Process the ".class" file
+ classNameSet.add(
+ child.getAbsolutePath().replace(rootDir, "").replaceFirst("\\.class$", "").replace('/', '.'));
+ } else {
+ continue;
+ }
+ }
+ return classNameSet;
+ }
+
+ /**
+ * Condition the file name as a class name.
+ *
+ * @param fileNameIn The file name to convert to a class name
+ * @return the conditioned class name
+ */
+ public static String processFileName(final String fileNameIn) {
+ String fileName = fileNameIn;
+
+ if (fileName == null) {
+ return null;
+ }
+ final int classesPos = fileName.indexOf(CLASSES_TOKEN);
+
+ if (classesPos != -1) {
+ fileName = fileName.substring(classesPos + CLASSES_TOKEN.length());
+ }
+
+ return fileName.replaceFirst("\\.class$", "").replace('/', '.');
+ }
+
+ /**
+ * Read all the class names from a Jar.
+ *
+ * @param jarFile the JAR file
+ * @return a set of class names
+ * @throws Exception on errors processing JARs
+ */
+ public static Set<String> processJar(final File jarFile) throws Exception {
+ // Pass the file as an input stream
+ return processJar(new FileInputStream(jarFile.getAbsolutePath()));
+ }
+
+ /**
+ * Read all the class names from a Jar.
+ *
+ * @param jarInputStream the JAR input stream
+ * @return a set of class names
+ * @throws Exception on errors processing JARs
+ */
+ public static Set<String> processJar(final InputStream jarInputStream) throws Exception {
+ // The return set
+ final TreeSet<String> classPathSet = new TreeSet<>();
+
+ if (jarInputStream == null) {
+ return classPathSet;
+ }
+ // JARs are ZIP files
+ final ZipInputStream zip = new ZipInputStream(jarInputStream);
+
+ // Iterate over each entry in the JAR
+ for (ZipEntry entry = zip.getNextEntry(); entry != null; entry = zip.getNextEntry()) {
+ if (!entry.isDirectory() && entry.getName().endsWith(".class") && !entry.getName().contains("$")) {
+ classPathSet.add(entry.getName().replaceFirst("\\.class$", "").replace('/', '.'));
+ }
+ }
+ zip.close();
+ return classPathSet;
+ }
+
+ /**
+ * The main method exercises this class for test purposes.
+ *
+ * @param args the args
+ */
+ public static void main(final String[] args) {
+ for (final String clz : getClassNames()) {
+ System.out.println("Found class: " + clz);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Contains support to find Java classes on the class path, in directories and in Jar files.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.java.classes;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Allows Java classes to be created by compiling Java source code and generating classes on the fly.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.java;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+import java.io.Serializable;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class MessageHolder holds a set of messages to be sent as a single block of messages in this messaging
+ * implementation.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type of message being handled by a message holder instance
+ */
+public class MessageHolder<MESSAGE> implements Serializable {
+ private static final int HASH_PRIME = 31;
+ private static final int FOUR_BYTES = 32;
+
+ // Serial ID
+ private static final long serialVersionUID = 1235487535388793719L;
+
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageHolder.class);
+
+ // Properties of the message holder
+ private final long creationTime;
+ private final InetAddress senderHostAddress;
+
+ // Sequence of message in the message holder
+ private final List<MESSAGE> messages;
+
+ /**
+ * Constructor, create the message holder.
+ *
+ * @param senderHostAddress the host address of the sender of the message holder container
+ */
+ public MessageHolder(final InetAddress senderHostAddress) {
+ LOGGER.entry(senderHostAddress);
+ messages = new ArrayList<>();
+ this.senderHostAddress = senderHostAddress;
+ creationTime = System.currentTimeMillis();
+ }
+
+ /**
+ * Return the messages in this message holder.
+ *
+ * @return the messages
+ */
+ public List<MESSAGE> getMessages() {
+ return messages;
+ }
+
+ /**
+ * Adds a message to this message holder.
+ *
+ * @param message the message to add
+ */
+ public void addMessage(final MESSAGE message) {
+ if (!messages.contains(message)) {
+ messages.add(message);
+ } else {
+ LOGGER.warn("duplicate message {} added to message holder", message);
+ }
+ }
+
+ /**
+ * Gets the creation time.
+ *
+ * @return the creation time
+ */
+ public long getCreationTime() {
+ return creationTime;
+ }
+
+ /**
+ * Gets the sender host address.
+ *
+ * @return the sender host address
+ */
+ public InetAddress getSenderHostAddress() {
+ return senderHostAddress;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "ApexCommandProtocol [creationTime=" + creationTime + ", senderHostAddress=" + senderHostAddress + "]";
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#hashCode()
+ */
+ @Override
+ public int hashCode() {
+ final int prime = HASH_PRIME;
+ int result = 1;
+ result = prime * result + ((senderHostAddress == null) ? 0 : senderHostAddress.hashCode());
+ result = prime * result + ((messages == null) ? 0 : messages.hashCode());
+ result = prime * result + (int) (creationTime ^ (creationTime >>> FOUR_BYTES));
+ return result;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#equals(java.lang.Object)
+ */
+ @Override
+ public boolean equals(final Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null) {
+ return false;
+ }
+ if (getClass() != obj.getClass()) {
+ return false;
+ }
+ final MessageHolder<?> other = (MessageHolder<?>) obj;
+ if (senderHostAddress == null) {
+ if (other.senderHostAddress != null) {
+ return false;
+ }
+ } else if (!senderHostAddress.equals(other.senderHostAddress)) {
+ return false;
+ }
+ if (messages == null) {
+ if (other.messages != null) {
+ return false;
+ }
+ } else if (!messages.equals(other.messages)) {
+ return false;
+ }
+ if (creationTime != other.creationTime) {
+ return false;
+ }
+ return true;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
+
+/**
+ * The listener interface for receiving message events. The class that is interested in processing a message event
+ * implements this interface.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> of message of any given type that is being listened for and handled
+ */
+public interface MessageListener<MESSAGE> {
+
+ /**
+ * This method is called when a message block is received on a web socket and is to be forwarded to a listener.
+ *
+ * @param data the message data containing a message
+ */
+ void onMessage(MessageBlock<MESSAGE> data);
+
+ /**
+ * This method is called when a string message is received on a web socket and is to be forwarded to a listener.
+ *
+ * @param messageString the message string
+ */
+ void onMessage(String messageString);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+/**
+ * This class will be called if an error occurs in Java handling.
+ *
+ * @author Liam Fallon
+ */
+public class MessagingException extends Exception {
+ private static final long serialVersionUID = -6375859029774312663L;
+
+ /**
+ * Instantiates a new messaging exception.
+ *
+ * @param message the message
+ */
+ public MessagingException(final String message) {
+ super(message);
+ }
+
+ /**
+ * Instantiates a new messaging exception.
+ *
+ * @param message the message
+ * @param e the e
+ */
+ public MessagingException(final String message, final Exception e) {
+ super(message, e);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+/**
+ * The Interface MessagingService specifies the methods that must be implemented by any implementation providing Apex
+ * messaging.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the type of message being passed by an implementation of Apex messaging
+ */
+public interface MessagingService<MESSAGE> {
+
+ /**
+ * Start the messaging connection.
+ */
+ void startConnection();
+
+ /**
+ * Stop the messaging connection.
+ */
+ void stopConnection();
+
+ /**
+ * Checks if the messaging connection is started.
+ *
+ * @return true, if is started
+ */
+ boolean isStarted();
+
+ /**
+ * Send a block of messages on the connection, the messages are contained in the the message holder container.
+ *
+ * @param messageHolder The message holder holding the messages to be sent
+ */
+ void send(MessageHolder<MESSAGE> messageHolder);
+
+ /**
+ * Send a string message on the connection.
+ *
+ * @param messageString The message string to be sent
+ */
+ void send(String messageString);
+
+ /**
+ * Adds a message listener that will be called when a message is received by this messaging service implementation.
+ *
+ * @param messageListener the message listener
+ */
+ void addMessageListener(MessageListener<MESSAGE> messageListener);
+
+ /**
+ * Removes the message listener.
+ *
+ * @param messageListener the message listener
+ */
+ void removeMessageListener(MessageListener<MESSAGE> messageListener);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+import java.net.InetSocketAddress;
+import java.net.URI;
+
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.client.MessagingClient;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server.MessageServerImpl;
+
+/**
+ * A factory class to create a "server" or "client" type Messaging Service.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type of message to be handled by this messaging service
+ */
+public class MessagingServiceFactory<MESSAGE> {
+
+ /**
+ * Create a web socket server instance and returns to the caller.
+ *
+ * @param address the address of the server machine
+ * @return the messaging service
+ */
+ public MessagingService<MESSAGE> createServer(final InetSocketAddress address) {
+ return new MessageServerImpl<>(address);
+ }
+
+ /**
+ * Create a web socket client instance and returns to the caller.
+ *
+ * @param uri the URI of the server to connect to
+ * @return an instance of {@link MessagingService}
+ */
+ public MessagingService<MESSAGE> createClient(final URI uri) {
+ if (uri == null) {
+ throw new IllegalArgumentException("URI cannot be null");
+ }
+ return new MessagingClient<>(uri);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws;
+
+import com.google.common.eventbus.Subscribe;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.nio.ByteBuffer;
+import java.util.List;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.TimeUnit;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageHolder;
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlockHandler;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.RawMessageBlock;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class RawMessageHandler handles raw messages being received on a Java web socket and forwards the messages to the
+ * DataHandler instance that has subscribed to the RawMessageHandler instance.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type of message being received
+ */
+public class RawMessageHandler<MESSAGE> implements WebSocketMessageListener<MESSAGE>, Runnable {
+ // The logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(RawMessageHandler.class);
+
+ // The amount of time to sleep during shutdown for the thread of this message handler to stop
+ private static final int SHUTDOWN_WAIT_TIME = 10;
+
+ // The timeout to wait between queue poll timeouts in milliseconds
+ private static final long QUEUE_POLL_TIMEOUT = 50;
+
+ // A queue that temporarily holds message blocks
+ private final BlockingQueue<MessageBlock<MESSAGE>> messageBlockQueue = new LinkedBlockingDeque<>();
+
+ // A queue that temporarily holds message blocks
+ private final BlockingQueue<String> stringMessageQueue = new LinkedBlockingDeque<>();
+
+ // Client applications that have subscribed for messages
+ private final MessageBlockHandler<MESSAGE> dataHandler = new MessageBlockHandler<MESSAGE>("data-processor");
+
+ // The thread that the raw message handler is receiving messages on
+ private Thread thisThread = null;
+
+ /**
+ * This method is called by the class with which this message listener has been registered.
+ *
+ * @param incomingData the data forwarded by the message reception class
+ */
+ @Override
+ @Subscribe
+ public void onMessage(final RawMessageBlock incomingData) {
+ // Sanity check and get incoming data
+ ByteBuffer dataByteBuffer = null;
+ if (incomingData != null && incomingData.getMessage() != null) {
+ dataByteBuffer = incomingData.getMessage();
+ } else {
+ return;
+ }
+
+ // Read the messages from the web socket and place them on the message queue for handling by the queue
+ // processing thread
+ ObjectInputStream ois = null;
+ try {
+ ois = new ObjectInputStream(new ByteArrayInputStream(dataByteBuffer.array()));
+ @SuppressWarnings("unchecked")
+ final MessageHolder<MESSAGE> messageHolder = (MessageHolder<MESSAGE>) ois.readObject();
+
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("message {} recieved from the client {} ", messageHolder.toString(),
+ messageHolder == null ? "Apex Engine " : messageHolder.getSenderHostAddress());
+ }
+
+ final List<MESSAGE> messages = messageHolder.getMessages();
+ if (messages != null) {
+ messageBlockQueue.add(new MessageBlock<MESSAGE>(messages, incomingData.getConn()));
+ }
+ } catch (IOException | ClassNotFoundException e) {
+ LOGGER.error("Failed to process message received");
+ LOGGER.catching(e);
+ } finally {
+ closeObjectStream(ois);
+ }
+ }
+
+ /**
+ * This method is called when a string message is received on a web socket and is to be forwarded to a listener.
+ *
+ * @param messageString the message string
+ */
+ @Override
+ @Subscribe
+ public void onMessage(final String messageString) {
+ if (messageString == null) {
+ return;
+ }
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("message {} recieved from the client {} ", messageString);
+ }
+ stringMessageQueue.add(messageString);
+ }
+
+ /**
+ * Close the {@link ObjectInputStream} stream.
+ *
+ * @param ois is an instance of {@link ObjectInputStream}
+ */
+ private void closeObjectStream(final ObjectInputStream ois) {
+ if (ois != null) {
+ try {
+ ois.close();
+ } catch (final IOException e) {
+ LOGGER.catching(e);
+ }
+ }
+ }
+
+ /**
+ * This thread monitors the message queue and processes messages as they appear on the queue.
+ *
+ * @see java.lang.Runnable#run()
+ */
+ @Override
+ public void run() {
+ LOGGER.debug("raw message listening started");
+ thisThread = Thread.currentThread();
+
+ // Run until termination
+ while (thisThread.isAlive() && !thisThread.isInterrupted()) {
+ try {
+ // Read message block messages from the queue and pass it to the data handler
+ MessageBlock<MESSAGE> messageBlock = null;
+ while ((messageBlock = messageBlockQueue.poll(1, TimeUnit.MILLISECONDS)) != null) {
+ dataHandler.post(messageBlock);
+ }
+ } catch (final InterruptedException e) {
+ LOGGER.debug("raw message listening has been interrupted");
+ break;
+ }
+
+ try {
+ // Read string messages from the queue and pass it to the data handler
+ String stringMessage = null;
+ while ((stringMessage = stringMessageQueue.poll(1, TimeUnit.MILLISECONDS)) != null) {
+ dataHandler.post(stringMessage);
+ }
+ } catch (final InterruptedException e) {
+ LOGGER.debug("raw message listening has been interrupted");
+ break;
+ }
+
+ // Wait for new messages
+ try {
+ Thread.sleep(QUEUE_POLL_TIMEOUT);
+ } catch (final InterruptedException e) {
+ LOGGER.debug("raw message listening has been interrupted");
+ break;
+ }
+ }
+
+ LOGGER.debug("raw message listening stopped");
+ }
+
+ /**
+ * Shutdown the message handler.
+ */
+ public void shutdown() {
+ LOGGER.entry("shutting down raw message listening . . .");
+
+ // Interrupt the message handling thread
+ thisThread.interrupt();
+
+ // Wait for thread shutdown
+ while (thisThread.isAlive()) {
+ ThreadUtilities.sleep(SHUTDOWN_WAIT_TIME);
+ }
+
+ LOGGER.exit("shut down raw message listening");
+ }
+
+ /**
+ * This method is called when a message is received on a web socket and is to be forwarded to a listener.
+ *
+ * @param data the message data containing a message
+ */
+ @Override
+ public void onMessage(final MessageBlock<MESSAGE> data) {
+ throw new UnsupportedOperationException("this operation is not supported");
+ }
+
+ /**
+ * Register a data forwarder to which messages coming in on the web socket will be forwarded.
+ *
+ * @param listener The listener to register
+ */
+ @Override
+ public void registerDataForwarder(final MessageListener<MESSAGE> listener) {
+ stateCheck(listener);
+ dataHandler.registerMessageHandler(listener);
+ }
+
+ /**
+ * Unregister a data forwarder that was previously registered on the web socket listener.
+ *
+ * @param listener The listener to unregister
+ */
+ @Override
+ public void unRegisterDataForwarder(final MessageListener<MESSAGE> listener) {
+ stateCheck(listener);
+ dataHandler.unRegisterMessageHandler(listener);
+ }
+
+ /**
+ * Sanity check for the listener and data handler.
+ *
+ * @param listener the listener to check
+ */
+ private void stateCheck(final MessageListener<MESSAGE> listener) {
+ if (listener == null) {
+ throw new IllegalArgumentException("The listener object cannot be null");
+ }
+ if (dataHandler == null) {
+ throw new IllegalStateException("Data handler not initialized");
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.RawMessageBlock;
+
+/**
+ * The listener interface for receiving webSocketMessage events. The class that is interested in processing a
+ * webSocketMessage event implements this interface, and the object created with that class is registered with a
+ * component using the component's addWebSocketMessageListener method. When the webSocketMessage event occurs, that
+ * object's appropriate method is invoked.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type
+ * @see RawMessageBlock
+ */
+public interface WebSocketMessageListener<MESSAGE> extends MessageListener<MESSAGE>, Runnable {
+
+ /**
+ * This method is called by the class with which this message listener has been registered.
+ *
+ * @param incomingData the data forwarded by the message reception class
+ */
+ void onMessage(RawMessageBlock incomingData);
+
+ /**
+ * Register a data forwarder to which messages coming in on the web socket will be forwarded.
+ *
+ * @param listener The listener to register
+ */
+ void registerDataForwarder(MessageListener<MESSAGE> listener);
+
+ /**
+ * Unregister a data forwarder that was previously registered on the web socket listener.
+ *
+ * @param listener The listener to unregister
+ */
+ void unRegisterDataForwarder(MessageListener<MESSAGE> listener);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.client;
+
+import java.net.URI;
+import java.nio.ByteBuffer;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.RawMessageHandler;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlockHandler;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.RawMessageBlock;
+import org.onap.policy.apex.core.infrastructure.threading.ApplicationThreadFactory;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class InternalMessageBusClient handles the client side of a web socket and handles the callback mechanism used to
+ * receive messages on the web socket.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type of message being handled
+ */
+abstract class InternalMessageBusClient<MESSAGE> extends WebSocketClientImpl {
+ private static final int THREAD_FACTORY_STACK_SIZE = 256;
+
+ // The logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(InternalMessageBusClient.class);
+
+ // Name of the event bus.
+ private static final String RAW_EVENT_BUS = "Raw-Event-Bus";
+
+ // This instance handles the raw data received from the web socket
+ private final RawMessageHandler<MESSAGE> rawMessageHandler = new RawMessageHandler<>();
+
+ // The message block handler to which to pass messages coming in on this client
+ private MessageBlockHandler<MESSAGE> messageBlockHandler = null;
+
+ // The raw message handler uses a thread to process incoming events off a queue, this class owns and controls that
+ // thread. These fields hold the thread and
+ // the thread factory for creating threads.
+ private ApplicationThreadFactory tFactory =
+ new ApplicationThreadFactory("ws-client-thread", THREAD_FACTORY_STACK_SIZE);
+ private Thread forwarderThread = null;
+
+ /**
+ * Construct the class and start the forwarding thread for received messages.
+ *
+ * @param serverUri the server URI to connect to
+ */
+ InternalMessageBusClient(final URI serverUri) {
+ // Call the super class to create the web socket
+ super(serverUri);
+ LOGGER.entry(serverUri.toString());
+
+ // Create the data handler for forwarding messages
+ messageBlockHandler = new MessageBlockHandler<>(RAW_EVENT_BUS);
+ messageBlockHandler.registerMessageHandler(rawMessageHandler);
+
+ // Create the thread that manages the queue in the data handler
+ forwarderThread = tFactory.newThread(rawMessageHandler);
+ forwarderThread.start();
+
+ LOGGER.exit();
+ }
+
+ /**
+ * Callback for binary messages received from the remote host.
+ *
+ * @param rawMessage the received raw message
+ * @see org.java_websocket.client.WebSocketClient#onMessage(java.nio.ByteBuffer)
+ */
+ @Override
+ public void onMessage(final ByteBuffer rawMessage) {
+ // Post the message to the data handler for forwarding to its listeners
+ messageBlockHandler.post(new RawMessageBlock(rawMessage, null));
+ }
+
+ /**
+ * Callback for binary messages received from the remote host.
+ *
+ * @param stringMessage the string message
+ * @see org.java_websocket.client.WebSocketClient#onMessage(java.lang.String)
+ */
+ @Override
+ public final void onMessage(final String stringMessage) {
+ messageBlockHandler.post(stringMessage);
+ }
+
+ /**
+ * Register a subscriber class to the raw message handler.
+ *
+ * @param listener a simple class, that listens for the events from Event
+ */
+ public void addMessageListener(final MessageListener<MESSAGE> listener) {
+ rawMessageHandler.registerDataForwarder(listener);
+ }
+
+ /**
+ * Removes the message listener.
+ *
+ * @param listener the listener
+ */
+ public void removeMessageListener(final MessageListener<MESSAGE> listener) {
+ rawMessageHandler.unRegisterDataForwarder(listener);
+ }
+
+ /**
+ * Stop the thread handling message forwarding.
+ */
+ protected void stopListener() {
+ rawMessageHandler.shutdown();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.client;
+
+import java.net.URI;
+
+import org.java_websocket.WebSocket;
+import org.onap.policy.apex.core.infrastructure.messaging.MessageHolder;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
+import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+
+/**
+ * The Class MessagingClient is the class that wraps web socket handling, message sending, and message reception on the
+ * client side of a web socket in Apex.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type
+ */
+public class MessagingClient<MESSAGE> extends InternalMessageBusClient<MESSAGE> implements MessagingService<MESSAGE> {
+ // The length of time to wait for a connection to a web socket server before aborting
+ private static final int CONNECTION_TIMEOUT_TIME_MS = 3000;
+
+ // The length of time to wait before checking if a connection to a web socket server has worked or not
+ private static final int CONNECTION_TRY_INTERVAL_MS = 100;
+
+ /**
+ * Constructor of this class, uses its {@link InternalMessageBusClient} superclass to set up the web socket and
+ * handle incoming message forwarding.
+ *
+ * @param serverUri The URI of the service
+ */
+ public MessagingClient(final URI serverUri) {
+ // Call the super class to create the web socket and set up received message forwarding
+ super(serverUri);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#stopConnection()
+ */
+ @Override
+ public void stopConnection() {
+ // Stop message reception in the super class
+ super.stopListener();
+
+ // Close the web socket
+ final WebSocket connection = super.getConnection();
+ if (connection != null && connection.isOpen()) {
+ connection.closeConnection(0, "");
+ }
+ this.close();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#startConnection()
+ */
+ @Override
+ public void startConnection() {
+ // Open the web socket
+ final WebSocket connection = super.getConnection();
+ if (connection != null && !connection.isOpen()) {
+ connect();
+ }
+
+ if (!waitforConnection(connection)) {
+ throw new IllegalStateException("Could not connect to the server");
+ }
+ }
+
+ /**
+ * This method waits for the timeout value for the client to connect to the web socket server.
+ *
+ * @param connection the connection to wait on
+ * @return true, if successful
+ */
+ private boolean waitforConnection(final WebSocket connection) {
+ // The total time we have before timeout
+ int timeoutMSCounter = CONNECTION_TIMEOUT_TIME_MS;
+
+ // Check the connection state
+ do {
+ switch (connection.getReadyState()) {
+ case NOT_YET_CONNECTED:
+ case CONNECTING:
+ case CLOSING:
+ // Not connected yet so wait for the try interval
+ ThreadUtilities.sleep(CONNECTION_TRY_INTERVAL_MS);
+ timeoutMSCounter -= CONNECTION_TRY_INTERVAL_MS;
+ break;
+ case OPEN:
+ // Connection is open, happy days
+ return true;
+ case CLOSED:
+ // Connection is closed, bah
+ return false;
+ default:
+ break;
+ }
+ }
+ // While the timeout value has not expired
+ while (timeoutMSCounter > 0);
+
+ // We have timed out
+ return false;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#send(org.onap.policy.apex.core.
+ * infrastructure. messaging.MessageHolder)
+ */
+ @Override
+ public void send(final MessageHolder<MESSAGE> commands) {
+ // Get the connection and send the message
+ final WebSocket connection = super.getConnection();
+ connection.send(MessagingUtils.serializeObject(commands));
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#send(java.lang.String)
+ */
+ @Override
+ public void send(final String messageString) {
+ final WebSocket connection = super.getConnection();
+ connection.send(messageString);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#isStarted()
+ */
+ @Override
+ public boolean isStarted() {
+ return getConnection().isOpen();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.client;
+
+import java.net.URI;
+
+import org.java_websocket.client.WebSocketClient;
+import org.java_websocket.handshake.ServerHandshake;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class implements {@link WebSocketClient} specific methods in order to act as a Java Web Socket client.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+abstract class WebSocketClientImpl extends WebSocketClient {
+ // The logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(WebSocketClientImpl.class);
+
+ /**
+ * Constructs a WebSocketClient instance and sets it to the connect to the specified URI. The channel does not
+ * attempt to connect automatically. You must call {@link connect} first to initiate the socket connection.
+ *
+ * @param serverUri the URI of the web socket server to connect to
+ */
+ WebSocketClientImpl(final URI serverUri) {
+ super(serverUri);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.client.WebSocketClient#onOpen(org.java_websocket.handshake.ServerHandshake)
+ */
+ @Override
+ public void onOpen(final ServerHandshake handshakedata) {
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("Connection opened to server {} --> {}", this.getURI(), handshakedata.getHttpStatusMessage());
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.client.WebSocketClient#onClose(int, java.lang.String, boolean)
+ */
+ @Override
+ public void onClose(final int code, final String reason, final boolean remote) {
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("Connection closed to server {} --> code \"{}\", reason \"{}\"", this.getURI(), code, reason);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.client.WebSocketClient#onError(java.lang.Exception)
+ */
+ @Override
+ public void onError(final Exception ex) {
+ LOGGER.info("Failed to make a connection to the server {} ", getURI());
+ LOGGER.catching(ex);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the client side of messaging over web sockets.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.client;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock;
+
+import java.util.List;
+
+import org.java_websocket.WebSocket;
+
+/**
+ * This class encapsulate messages and the web socket on which they are handled.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type of message being handled
+ */
+public final class MessageBlock<MESSAGE> {
+
+ // List of Messages received on a web socket
+ private final List<MESSAGE> messages;
+
+ // The web socket on which the messages are handled
+ private final WebSocket webSocket;
+
+ /**
+ * Instantiates a new message block.
+ *
+ * @param messages the messages in the message block
+ * @param webSocket the web socket used to handle the message block
+ */
+ public MessageBlock(final List<MESSAGE> messages, final WebSocket webSocket) {
+ this.messages = messages;
+ this.webSocket = webSocket;
+ }
+
+ /**
+ * Gets the messages.
+ *
+ * @return the messages
+ */
+ public List<MESSAGE> getMessages() {
+ return messages;
+ }
+
+ /**
+ * Gets the web socket.
+ *
+ * @return the web socket
+ */
+ public WebSocket getConnection() {
+ return webSocket;
+ }
+
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock;
+
+import com.google.common.eventbus.EventBus;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class is used to pass messages received on a Java web socket to listening application class instances using an
+ * event bus.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type
+ */
+public class MessageBlockHandler<MESSAGE> {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageBlockHandler.class);
+
+ /**
+ * This event bus will forward the events to all of its subscribers.
+ */
+ private EventBus eventBus = null;
+
+ /**
+ * Instantiates a new data handler.
+ *
+ * @param eventBusName the name of the event bus for this message block handler
+ */
+ public MessageBlockHandler(final String eventBusName) {
+ eventBus = new EventBus(eventBusName);
+ LOGGER.trace("message bus {} created ", eventBusName);
+ }
+
+ /**
+ * Post a raw message block on the data handler event bus of this class.
+ *
+ * @param rawMessageBlock the block containing raw messages
+ */
+ public void post(final RawMessageBlock rawMessageBlock) {
+ if (rawMessageBlock.getMessage() != null) {
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("new raw message recieved from {}", rawMessageBlock.getConn() == null ? "server"
+ : rawMessageBlock.getConn().getRemoteSocketAddress().getHostName());
+ }
+ eventBus.post(rawMessageBlock);
+ }
+ }
+
+ /**
+ * Post a block of typed messages on the data handler event bus of this class.
+ *
+ * @param messageBlock the block containing typed messages
+ */
+ public void post(final MessageBlock<MESSAGE> messageBlock) {
+ if (messageBlock.getMessages() != null) {
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("new data message recieved from {}", messageBlock.getConnection() == null ? "server"
+ : messageBlock.getConnection().getRemoteSocketAddress().getHostName());
+ }
+ eventBus.post(messageBlock);
+ }
+ }
+
+ /**
+ * Post a string message on the data handler event bus of this class.
+ *
+ * @param messageString the string message
+ */
+ public void post(final String messageString) {
+ if (messageString != null) {
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("new string message recieved from server: " + messageString);
+ }
+ eventBus.post(messageString);
+ }
+ }
+
+ /**
+ * Register a listener to event bus.
+ *
+ * @param listener is an instance of WebSocketMessageListener
+ */
+ public void registerMessageHandler(final MessageListener<MESSAGE> listener) {
+ LOGGER.entry(listener);
+ if (listener == null) {
+ throw new IllegalArgumentException("listener object cannot be null");
+ }
+ eventBus.register(listener);
+ LOGGER.debug("message listener {} is registered with forwarder", listener);
+ LOGGER.exit();
+ }
+
+ /**
+ * Remove the listener subscribed to the event bus.
+ *
+ * @param listener the listener
+ */
+ public void unRegisterMessageHandler(final MessageListener<MESSAGE> listener) {
+ if (listener == null) {
+ throw new IllegalArgumentException("listener object cannot be null");
+ }
+ LOGGER.entry(listener);
+ eventBus.unregister(listener);
+ LOGGER.trace(" message listener {} unregistered from forwarder", listener);
+ LOGGER.exit();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock;
+
+import java.nio.ByteBuffer;
+
+import org.java_websocket.WebSocket;
+
+/**
+ * A container for a raw message block and the connection on which it is handled.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public final class RawMessageBlock {
+ // The raw message
+ private final ByteBuffer message;
+
+ // The web socket on which the message is handled
+ private final WebSocket webSocket;
+
+ /**
+ * Constructor, instantiate the bean.
+ *
+ * @param message {@link ByteBuffer} message from the web socket
+ * @param webSocket {@link WebSocket} the web socket on which the message is handled
+ */
+ public RawMessageBlock(final ByteBuffer message, final WebSocket webSocket) {
+ this.message = message;
+ this.webSocket = webSocket;
+ }
+
+ /**
+ * A getter method for message.
+ *
+ * @return the message
+ */
+ public ByteBuffer getMessage() {
+ return message;
+ }
+
+ /**
+ * A getter method for the web socket.
+ *
+ * @return the web socket
+ */
+ public WebSocket getConn() {
+ return webSocket;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Pass blocks of messages on Web Sockets to clients using an event bus.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides a Web Service implementation of the Messaging interfaces.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server;
+
+import java.net.InetSocketAddress;
+import java.nio.ByteBuffer;
+
+import org.java_websocket.WebSocket;
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.RawMessageHandler;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlockHandler;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.RawMessageBlock;
+import org.onap.policy.apex.core.infrastructure.threading.ApplicationThreadFactory;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class InternalMessageBusServer handles the server side of a web socket and handles the callback mechanism used to
+ * receive messages on the web socket.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type
+ */
+abstract class InternalMessageBusServer<MESSAGE> extends WebSocketServerImpl implements MessagingService<MESSAGE> {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(InternalMessageBusServer.class);
+
+ private static final int THREAD_FACTORY_STACK_SIZE = 256;
+
+ // Name of the event bus.
+ private static final String RAW_EVENT_BUS = "Raw-Event-Bus";
+
+ // This instance handles the raw data received from the web socket
+ private final RawMessageHandler<MESSAGE> rawMessageHandler = new RawMessageHandler<>();
+
+ // The message block handler to which to pass messages coming in on this client
+ private MessageBlockHandler<MESSAGE> messageBlockHandler = null;
+
+ // The raw message handler uses a thread to process incoming events off a queue, this class owns and controls that
+ // thread. These fields hold the thread and
+ // the thread factory for creating threads.
+ private ApplicationThreadFactory tFactory =
+ new ApplicationThreadFactory("ws-server-thread", THREAD_FACTORY_STACK_SIZE);
+ private Thread forwarderThread = null;
+
+ /**
+ * Construct the class and start the forwarding thread for received messages.
+ *
+ * @param address the address of the server machine
+ */
+ protected InternalMessageBusServer(final InetSocketAddress address) {
+ // Call the super class to create the web socket
+ super(address);
+ LOGGER.entry(address.getAddress().getHostAddress() + ":" + address.getPort());
+
+ // Create the data handler for forwarding messages
+ messageBlockHandler = new MessageBlockHandler<>(RAW_EVENT_BUS);
+ messageBlockHandler.registerMessageHandler(rawMessageHandler);
+
+ // Create the thread that manages the queue in the data handler
+ forwarderThread = tFactory.newThread(rawMessageHandler);
+ forwarderThread.start();
+
+ LOGGER.exit();
+ }
+
+ /**
+ * Callback for binary messages received from the remote host.
+ *
+ * @param webSocket the web socket on which the raw message was received
+ * @param rawMessage the received raw message
+ * @see #onMessage(WebSocket, String)
+ */
+ @Override
+ public void onMessage(final WebSocket webSocket, final ByteBuffer rawMessage) {
+ messageBlockHandler.post(new RawMessageBlock(rawMessage, webSocket));
+ }
+
+ /**
+ * Register a subscriber class to the raw message handler.
+ *
+ * @param subscriber the subscriber
+ */
+ @Override
+ public void addMessageListener(final MessageListener<MESSAGE> subscriber) {
+ rawMessageHandler.registerDataForwarder(subscriber);
+ }
+
+ /**
+ * Removes the message listener.
+ *
+ * @param subscriber the subscriber
+ */
+ @Override
+ public void removeMessageListener(final MessageListener<MESSAGE> subscriber) {
+ rawMessageHandler.unRegisterDataForwarder(subscriber);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.server.WebSocketServer#onMessage(org.java_websocket.WebSocket, java.lang.String)
+ */
+ @Override
+ public void onMessage(final WebSocket webSocket, final String stringMessage) {
+ messageBlockHandler.post(stringMessage);
+ }
+
+ /**
+ * Stop the thread handling message forwarding.
+ */
+ protected void stopListener() {
+ rawMessageHandler.shutdown();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.util.Collection;
+
+import org.java_websocket.WebSocket;
+import org.onap.policy.apex.core.infrastructure.messaging.MessageHolder;
+import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * A messaging server implementation using web socket.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ * @param <MESSAGE> the generic type of message being passed
+ */
+public class MessageServerImpl<MESSAGE> extends InternalMessageBusServer<MESSAGE> {
+ // The logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageServerImpl.class);
+
+ // The Web Socket protocol for URIs and URLs
+ private static final String PROTOCOL = "ws://";
+
+ // URI of this server
+ private final String connectionURI;
+
+ // Indicates if the web socket server is started or not
+ private boolean isStarted = false;
+
+ /**
+ * Instantiates a new web socket messaging server for Apex.
+ *
+ * @param address the address of the server machine on which to start the server
+ */
+ public MessageServerImpl(final InetSocketAddress address) {
+ // Call the super class to create the web socket and set up received message forwarding
+ super(address);
+ LOGGER.entry(address);
+
+ // Compose the Web Socket URI
+ connectionURI = PROTOCOL + address.getHostString() + ":" + address.getPort();
+ LOGGER.debug("Server connection URI: {}", connectionURI);
+
+ LOGGER.exit();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.server.WebSocketServer#start()
+ */
+ @Override
+ public void startConnection() {
+ // Start reception of connections on the web socket
+ start();
+ isStarted = true;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.server.WebSocketServer#stop()
+ */
+ @Override
+ public void stopConnection() {
+ // Stop message listening using our super class
+ stopListener();
+
+ // Stop the web socket server
+ try {
+ // Close all connections on this web socket server
+ for (final WebSocket connection : connections()) {
+ connection.closeConnection(0, "");
+ }
+ stop();
+ } catch (final IOException ioe) {
+ LOGGER.catching(ioe);
+ } catch (final InterruptedException e) {
+ // This can happen in normal operation so ignore
+ }
+ isStarted = false;
+ }
+
+ /**
+ * This method returns the current connection URI , if the server started otherwise it throws
+ * {@link IllegalStateException}.
+ *
+ * @return connection URI
+ */
+ public String getConnectionURI() {
+ if (connectionURI == null) {
+ throw new IllegalStateException("URI not set - The server is not started");
+ }
+ return connectionURI;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#send(org.onap.policy.apex.core.
+ * infrastructure. messaging.MessageHolder)
+ */
+ @Override
+ public void send(final MessageHolder<MESSAGE> message) {
+ // Send the incoming message to all clients connected to this web socket
+ final Collection<WebSocket> connections = connections();
+ for (final WebSocket webSocket : connections) {
+ webSocket.send(MessagingUtils.serializeObject(message));
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#send(java.lang.String)
+ */
+ @Override
+ public void send(final String messageString) {
+ final Collection<WebSocket> connections = connections();
+ for (final WebSocket webSocket : connections) {
+ webSocket.send(messageString);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessagingService#isStarted()
+ */
+ @Override
+ public boolean isStarted() {
+ return isStarted;
+ }
+
+ @Override
+ public void onStart() {
+ LOGGER.debug("started deployment server on URI: {}", connectionURI);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server;
+
+import java.net.InetSocketAddress;
+
+import org.java_websocket.WebSocket;
+import org.java_websocket.handshake.ClientHandshake;
+import org.java_websocket.server.WebSocketServer;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class is the web socket server specific implementation for Apex.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+abstract class WebSocketServerImpl extends WebSocketServer {
+ // The logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageServerImpl.class);
+
+ /**
+ * Constructor of this class.
+ *
+ * @param address host address of the local machine.
+ */
+ protected WebSocketServerImpl(final InetSocketAddress address) {
+ super(address);
+ LOGGER.entry(address.getAddress().getHostAddress() + ":" + address.getPort());
+ LOGGER.exit();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.server.WebSocketServer#onOpen(org.java_websocket.WebSocket ,
+ * org.java_websocket.handshake.ClientHandshake)
+ */
+ @Override
+ public void onOpen(final WebSocket conn, final ClientHandshake handshake) {
+ LOGGER.entry(conn, handshake);
+ LOGGER.debug("A client connection opened from machine {}.",
+ conn.getRemoteSocketAddress().getAddress().getHostAddress());
+ LOGGER.exit();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.server.WebSocketServer#onClose(org.java_websocket. WebSocket, int, java.lang.String,
+ * boolean)
+ */
+ @Override
+ public void onClose(final WebSocket conn, final int code, final String reason, final boolean remote) {
+ LOGGER.entry(conn, code, remote);
+ LOGGER.debug("A client connection from machine {} closing with code {}.",
+ conn.getRemoteSocketAddress().getAddress().getHostAddress(), code);
+ LOGGER.exit();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.java_websocket.server.WebSocketServer#onError(org.java_websocket.WebSocket, java.lang.Exception)
+ */
+ @Override
+ public void onError(final WebSocket conn, final Exception ex) {
+ // some errors like port binding failed may not be assignable to a specific web socket
+ LOGGER.error("server error occurred", ex);
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the server side of messaging over web sockets.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides support for passing messages as POJOs and as strings over Web Sockets.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.stringmessaging;
+
+import com.google.common.eventbus.Subscribe;
+
+import java.net.URI;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingException;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingServiceFactory;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class uses a web socket client to send and receive strings over a web socket.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class WSStringMessageClient implements WSStringMessager {
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(WSStringMessageClient.class);
+
+ // Message service factory and the message service itself
+ private final MessagingServiceFactory<String> factory = new MessagingServiceFactory<>();
+ private MessagingService<String> service = null;
+
+ // The listener to use for reception of strings
+ private WSStringMessageListener wsStringMessageListener;
+
+ // Address of the server
+ private final String host;
+ private final int port;
+ private String uriString;
+
+ /**
+ * Constructor, define the host and port of the server to connect to.
+ *
+ * @param host the host of the server
+ * @param port the port of the server
+ */
+ public WSStringMessageClient(final String host, final int port) {
+ this.host = host;
+ this.port = port;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageSender#start(org.onap.policy.
+ * apex. core.infrastructure.messaging. stringmessaging.WSStringMessageListener)
+ */
+ @Override
+ public void start(final WSStringMessageListener newWsStringMessageListener) throws MessagingException {
+ this.wsStringMessageListener = newWsStringMessageListener;
+
+ uriString = "ws://" + host + ":" + port;
+ LOGGER.entry("web socket event consumer client to \"" + uriString + "\" starting . . .");
+
+ try {
+ service = factory.createClient(new URI(uriString));
+ service.addMessageListener(new WSStringMessageClientListener());
+ service.startConnection();
+ } catch (final Exception e) {
+ LOGGER.warn("web socket event consumer client to \"" + uriString + "\" start failed", e);
+ throw new MessagingException("web socket event consumer client to \"" + uriString + "\" start failed", e);
+ }
+
+ LOGGER.exit("web socket event consumer client to \"" + uriString + "\" started");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageSender#stop()
+ */
+ @Override
+ public void stop() {
+ LOGGER.entry("web socket event consumer client to \"" + uriString + "\" stopping . . .");
+ service.stopConnection();
+ LOGGER.exit("web socket event consumer client to \"" + uriString + "\" stopped");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageSender#sendString(java.lang.
+ * String)
+ */
+ @Override
+ public void sendString(final String stringMessage) {
+ service.send(stringMessage);
+
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("message sent to server: " + stringMessage);
+ }
+ }
+
+ /**
+ * The Class WSStringMessageClientListener.
+ */
+ private class WSStringMessageClientListener implements MessageListener<String> {
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(org.onap.policy.apex.core.
+ * infrastructure.messaging.impl.ws.messageblock. MessageBlock)
+ */
+ @Subscribe
+ @Override
+ public void onMessage(final MessageBlock<String> messageBlock) {
+ throw new UnsupportedOperationException("raw messages are not supported on string message clients");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(java.lang.String)
+ */
+ @Subscribe
+ @Override
+ public void onMessage(final String messageString) {
+ wsStringMessageListener.receiveString(messageString);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.stringmessaging;
+
+/**
+ * This interface is used to call back the owner of a String Web socket message server or client.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public interface WSStringMessageListener {
+
+ /**
+ * Receive a string coming off a web socket.
+ *
+ * @param stringMessage the string message
+ */
+ void receiveString(String stringMessage);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.stringmessaging;
+
+import com.google.common.eventbus.Subscribe;
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingException;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingServiceFactory;
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
+import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * This class runs a web socket server for sending and receiving of strings over a web socket.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class WSStringMessageServer implements WSStringMessager {
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(WSStringMessageServer.class);
+
+ // Message service factory and the message service itself
+ private final MessagingServiceFactory<String> factory = new MessagingServiceFactory<>();
+ private MessagingService<String> service = null;
+
+ // The listener to use for reception of strings
+ private WSStringMessageListener wsStringMessageListener;
+
+ // Address of the server
+ private final int port;
+
+ /**
+ * Constructor, define the port of the server.
+ *
+ * @param port the port of the server
+ */
+ public WSStringMessageServer(final int port) {
+ this.port = port;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageSender#start(org.onap.policy.
+ * apex. core.infrastructure.messaging. stringmessaging.WSStringMessageListener)
+ */
+ @Override
+ public void start(final WSStringMessageListener newWsStringMessageListener) throws MessagingException {
+ this.wsStringMessageListener = newWsStringMessageListener;
+
+ LOGGER.entry("web socket event consumer server starting . . .");
+
+ try {
+ final InetAddress addrLan = MessagingUtils.getLocalHostLANAddress();
+ LOGGER.debug("web socket string message server LAN address=" + addrLan.getHostAddress());
+ final InetAddress addr = InetAddress.getLocalHost();
+ LOGGER.debug("web socket string message server host address=" + addr.getHostAddress());
+
+ service = factory.createServer(new InetSocketAddress(port));
+ service.addMessageListener(new WSStringMessageServerListener());
+
+ service.startConnection();
+ } catch (final Exception e) {
+ LOGGER.warn("web socket string message server start failed", e);
+ throw new MessagingException("web socket string message start failed", e);
+ }
+
+ LOGGER.exit("web socket string message server started");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageSender#stop()
+ */
+ @Override
+ public void stop() {
+ LOGGER.entry("web socket string message server stopping . . .");
+ service.stopConnection();
+ LOGGER.exit("web socket string message server stopped");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageSender#sendString(java.lang.
+ * String)
+ */
+ @Override
+ public void sendString(final String stringMessage) {
+ service.send(stringMessage);
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("server sent message: " + stringMessage);
+ }
+ }
+
+ /**
+ * The listener for strings coming into the server.
+ */
+ private class WSStringMessageServerListener implements MessageListener<String> {
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(org.onap.policy.apex.core.
+ * infrastructure.messaging.impl.ws.messageblock. MessageBlock)
+ */
+ @Subscribe
+ @Override
+ public void onMessage(final MessageBlock<String> messageBlock) {
+ throw new UnsupportedOperationException("raw messages are not supported on string message clients");
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(java.lang.String)
+ */
+ @Subscribe
+ @Override
+ public void onMessage(final String messageString) {
+ wsStringMessageListener.receiveString(messageString);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.stringmessaging;
+
+import org.onap.policy.apex.core.infrastructure.messaging.MessagingException;
+
+/**
+ * This interface is used to call a String Web socket message server or client to send a string.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public interface WSStringMessager {
+
+ /**
+ * Start the string message sender.
+ *
+ * @param wsStringMessageListener the listener to use for listening for string messages
+ * @throws MessagingException the messaging exception
+ */
+ void start(WSStringMessageListener wsStringMessageListener) throws MessagingException;
+
+ /**
+ * Stop the string messaging sender.
+ */
+ void stop();
+
+ /**
+ * Send a string on a web socket.
+ *
+ * @param stringMessage the string message to send
+ */
+ void sendString(String stringMessage);
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides string messaging over Web Sockets.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.stringmessaging;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.util.Enumeration;
+
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class MessagingUtils is a class with static methods used in IPC messaging for finding free ports, translating
+ * host names to addresses, serializing objects and flushing object streams.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public final class MessagingUtils {
+ // The port number of the lowest user port, ports 0-1023 are system ports
+ private static final int LOWEST_USER_PORT = 1024;
+
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessagingUtils.class);
+
+ /**
+ * Private constructor used to prevent sub class instantiation.
+ */
+ private MessagingUtils() {}
+
+ /**
+ * This method searches the availability of the port, if the requested port not available, this method will throw an
+ * exception.
+ *
+ * @param port the port to check
+ * @return the port verified as being free
+ * @throws RuntimeException on port allocation errors
+ */
+ public static int checkPort(final int port) {
+ LOGGER.entry("Checking availability of port {}", port);
+
+ Socket s = null;
+ try {
+ // Try to connect to the port, if we can connect then the port is occupied
+ s = new Socket("localhost", port);
+ LOGGER.debug("Port {} is not available", port);
+
+ throw new RuntimeException("could not allocate requested port: " + port);
+ } catch (final IOException e) {
+ // We found a free port
+ LOGGER.debug("Port {} is available ", port);
+ return port;
+ } finally {
+ // Close the socket used to check if the port was free
+ if (s != null) {
+ try {
+ s.close();
+ } catch (final IOException e) {
+ LOGGER.catching(e);
+ LOGGER.warn("could not allocate requested port " + port, e);
+ }
+ }
+ }
+ }
+
+ /**
+ * This method searches the availability of the port, if the requested port not available,this method will increment
+ * the port number and check the availability of that port, this process will continue until it find port available.
+ *
+ * @param port the first port to check
+ * @return the port that was found
+ * @throws RuntimeException on port allocation errors
+ */
+ public static int findPort(final int port) {
+ LOGGER.entry("Checking availability of port {}", port);
+
+ Socket s = null;
+ try {
+ // Try to connect to the port, if we can connect then the port is occupied
+ s = new Socket("localhost", port);
+ LOGGER.debug("Port {} is not available", port);
+
+ // Recurse and try the next port
+ return findPort(port + 1);
+ } catch (final IOException e) {
+ // We found a free port
+ LOGGER.debug("Port {} is available ", port);
+ return port;
+ } finally {
+ // Close the socket used to check if the port was free
+ if (s != null) {
+ try {
+ s.close();
+ } catch (final IOException e) {
+ LOGGER.catching(e);
+ LOGGER.warn("could not allocate requested port " + port, e);
+ throw new RuntimeException("could not allocate requested port " + port, e);
+ }
+ }
+ }
+ }
+
+ /**
+ * Returns the local host address.
+ *
+ * @return the local host address
+ */
+ public static InetAddress getHost() {
+ try {
+ return InetAddress.getLocalHost();
+ } catch (final UnknownHostException e) {
+ throw new IllegalStateException(e.getMessage(), e);
+ }
+ }
+
+ /**
+ * This method searches the availability of the port, if the requested port not available,this method will increment
+ * the port number and check the availability, this process will continue until it find port available.
+ *
+ * @param port the first port to check
+ * @return the port that was found
+ * @throws RuntimeException on port allocation errors
+ */
+ public static int allocateAddress(final int port) {
+ if (port < LOWEST_USER_PORT) {
+ throw new IllegalArgumentException("The port " + port + " is already in use");
+ }
+ return MessagingUtils.findPort(port);
+ }
+
+ /**
+ * Get an Internet Address for the local host.
+ *
+ * @return an Internet address
+ * @throws UnknownHostException if the address of the local host cannot be found
+ */
+ public static InetAddress getLocalHostLANAddress() throws UnknownHostException {
+ try {
+ InetAddress candidateAddress = null;
+ // Iterate all NICs (network interface cards)...
+ for (final Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces(); ifaces
+ .hasMoreElements();) {
+ final NetworkInterface iface = ifaces.nextElement();
+ // Iterate all IP addresses assigned to each card...
+ for (final Enumeration<InetAddress> inetAddrs = iface.getInetAddresses(); inetAddrs
+ .hasMoreElements();) {
+ final InetAddress inetAddr = inetAddrs.nextElement();
+ if (!inetAddr.isLoopbackAddress()) {
+
+ if (inetAddr.isSiteLocalAddress()) {
+ // Found non-loopback site-local address. Return it
+ // immediately...
+ return inetAddr;
+ } else if (candidateAddress == null) {
+ // Found non-loopback address, but not
+ // necessarily site-local.
+ // Store it as a candidate to be returned if
+ // site-local address is not subsequently
+ // found...
+ candidateAddress = inetAddr;
+ // Note that we don't repeatedly assign
+ // non-loopback non-site-local addresses as
+ // candidates,
+ // only the first. For subsequent iterations,
+ // candidate will be non-null.
+ }
+ }
+ }
+ }
+ if (candidateAddress != null) {
+ // We did not find a site-local address, but we found some other
+ // non-loopback address.
+ // Server might have a non-site-local address assigned to its
+ // NIC (or it might be running
+ // IPv6 which deprecates the "site-local" concept).
+ // Return this non-loopback candidate address...
+ return candidateAddress;
+ }
+ // At this point, we did not find a non-loopback address.
+ // Fall back to returning whatever InetAddress.getLocalHost()
+ // returns...
+ final InetAddress jdkSuppliedAddress = InetAddress.getLocalHost();
+ if (jdkSuppliedAddress == null) {
+ throw new UnknownHostException("The JDK InetAddress.getLocalHost() method unexpectedly returned null.");
+ }
+ return jdkSuppliedAddress;
+ } catch (final Exception e) {
+ final UnknownHostException unknownHostException =
+ new UnknownHostException("Failed to determine LAN address: " + e);
+ unknownHostException.initCause(e);
+ throw unknownHostException;
+ }
+ }
+
+ /**
+ * This method serializes the message holder objects.
+ *
+ * @param object the object
+ * @return byte[]
+ */
+ public static byte[] serializeObject(final Object object) {
+ LOGGER.entry(object.getClass().getName());
+ final ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
+ ObjectOutputStream oos = null;
+ try {
+ oos = new ObjectOutputStream(bytesOut);
+ oos.writeObject(object);
+ } catch (final IOException e) {
+ LOGGER.warn("error on object serialization", e);
+ } finally {
+ flushAndClose(oos, bytesOut);
+ }
+ final byte[] bytes = bytesOut.toByteArray();
+ return bytes;
+ }
+
+ /**
+ * Flush and close an object stream and a byte array output stream.
+ *
+ * @param oos the object output stream
+ * @param bytesOut the byte array output stream
+ */
+ private static void flushAndClose(final ObjectOutputStream oos, final ByteArrayOutputStream bytesOut) {
+ try {
+ if (oos != null) {
+ oos.flush();
+ oos.close();
+ }
+ if (bytesOut != null) {
+ bytesOut.close();
+ }
+
+ } catch (final IOException e) {
+ LOGGER.error("Failed to close the Srialization operation");
+ LOGGER.catching(e);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Contains utility classes for messaging using sockets and web sockets.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging.util;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides infrastructure and utility functions for use by other classes and modules in APEX.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.threading;
+
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * This class provides a thread factory for use by classes that require thread factories to handle concurrent operation.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public class ApplicationThreadFactory implements ThreadFactory {
+ private static final String HYPHEN = "-";
+ private static final String APPLICATION_NAME = "Apex-";
+ private static final AtomicInteger NEXT_POOL_NUMBER = new AtomicInteger();
+ private final ThreadGroup group;
+ private final AtomicInteger nextThreadNumber = new AtomicInteger();
+ private final String name;
+ private final long stackSize;
+ private final int threadPriority;
+
+ /**
+ * Instantiates a new application thread factory with a default stack size and normal thread priority.
+ *
+ * @param nameLocal the name local
+ */
+ public ApplicationThreadFactory(final String nameLocal) {
+ this(nameLocal, 0);
+ }
+
+ /**
+ * Instantiates a new application thread factory with a default normal thread priority.
+ *
+ * @param nameLocal the name local
+ * @param stackSize the stack size
+ */
+ public ApplicationThreadFactory(final String nameLocal, final long stackSize) {
+ this(nameLocal, stackSize, Thread.NORM_PRIORITY);
+ }
+
+ /**
+ * Instantiates a new application thread factory with a specified thread priority.
+ *
+ * @param nameLocal the name local
+ * @param stackSize the stack size
+ * @param threadPriority the thread priority
+ */
+ public ApplicationThreadFactory(final String nameLocal, final long stackSize, final int threadPriority) {
+ final SecurityManager s = System.getSecurityManager();
+ group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
+ name = APPLICATION_NAME + nameLocal + HYPHEN + NEXT_POOL_NUMBER.getAndIncrement();
+ this.stackSize = stackSize;
+ this.threadPriority = threadPriority;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.util.concurrent.ThreadFactory#newThread(java.lang.Runnable)
+ */
+ @Override
+ public Thread newThread(final Runnable r) {
+ final Thread thisThread;
+ if (stackSize > 0) {
+ thisThread = new Thread(group, r, name + ':' + nextThreadNumber.getAndIncrement(), stackSize);
+ } else {
+ thisThread = new Thread(group, r, name + ':' + nextThreadNumber.getAndIncrement());
+ }
+ if (thisThread.isDaemon()) {
+ thisThread.setDaemon(false);
+ }
+ thisThread.setPriority(threadPriority);
+
+ return thisThread;
+ }
+
+ /**
+ * Stop group threads.
+ */
+ public void stopGroupThreads() {
+ group.interrupt();
+ group.list();
+
+ }
+
+ /**
+ * Gets the name of the thread factory.
+ *
+ * @return the name
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * Gets the stack size of the threads created by this thread factory.
+ *
+ * @return the stack size
+ */
+ public long getStackSize() {
+ return stackSize;
+ }
+
+ /**
+ * Gets the thread priority of the threads created by this thread factory.
+ *
+ * @return the thread priority
+ */
+ public int getThreadPriority() {
+ return threadPriority;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "ApplicationThreadFactory [nextPollNumber=" + NEXT_POOL_NUMBER + ",nextThreadNumber=" + nextThreadNumber
+ + ", name=" + name + ", stackSize=" + stackSize + ", threadPriority=" + threadPriority + "]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.threading;
+
+/**
+ * This class is a helper class for carrying out common threading tasks.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public final class ThreadUtilities {
+
+ /**
+ * Private constructor to prevent sub-classing of this class.
+ */
+ private ThreadUtilities() {}
+
+ /**
+ * Sleeps for the specified number of milliseconds, hiding interrupt handling.
+ *
+ * @param milliseconds the milliseconds
+ * @return true, if successful
+ */
+ public static boolean sleep(final long milliseconds) {
+ try {
+ Thread.sleep(milliseconds);
+ } catch (final InterruptedException e) {
+ return false;
+ }
+
+ return true;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides factories and utility functions for threads.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.threading;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.xml;
+
+import java.io.InputStream;
+
+import javax.xml.namespace.QName;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+import org.w3c.dom.Document;
+
+/**
+ * A generic class for applying the XPATH queries on XML files.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public class XPathReader {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(XPathReader.class);
+
+ private String xmlFileName = null;
+ private InputStream xmlStream = null;
+ private Document xmlDocument;
+ private XPath xPath;
+
+ /**
+ * Construct Reader for the file passed in.
+ *
+ * @param xmlFileName the xml file name
+ */
+ public XPathReader(final String xmlFileName) {
+ this.xmlFileName = xmlFileName;
+ init();
+ }
+
+ /**
+ * Construct Reader for the stream passed in.
+ *
+ * @param xmlStream a stream of XML
+ */
+ public XPathReader(final InputStream xmlStream) {
+ this.xmlStream = xmlStream;
+ init();
+ }
+
+ /**
+ * Initialise the x-path reader.
+ */
+ private void init() {
+ try {
+ LOGGER.info("Initializing XPath reader");
+
+ // Check if this is operating on a file
+ if (xmlFileName != null) {
+ xmlDocument = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlFileName);
+ }
+ // Check if this is operating on a stream
+ else if (xmlStream != null) {
+ xmlDocument = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlStream);
+
+ }
+ // We have an error
+ else {
+ LOGGER.error("XPath reader not initialized with either a file or a stream");
+ return;
+ }
+
+ xPath = XPathFactory.newInstance().newXPath();
+ LOGGER.info("Initialized XPath reader");
+ } catch (final Exception ex) {
+ LOGGER.error("Error parsing XML file/stream from XPath reading, reason :\n" + ex.getMessage());
+ }
+ }
+
+ /**
+ * Read items from the file using xpath.
+ *
+ * @param expression x-path expression
+ * @param returnType XML node Set
+ * @return last node collected
+ */
+ public Object read(final String expression, final QName returnType) {
+ try {
+ final XPathExpression xPathExpression = xPath.compile(expression);
+ return xPathExpression.evaluate(xmlDocument, returnType);
+ } catch (final XPathExpressionException ex) {
+ LOGGER.error("Failed to read XML file for XPath processing, reason:\n" + ex.getMessage());
+ return null;
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides utility XML classes for use by other classes and modules in APEX.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.infrastructure.xml;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.core.infrastructure.java.compile.singleclass;
+
+import java.util.Arrays;
+import java.util.List;
+
+import javax.tools.Diagnostic;
+import javax.tools.DiagnosticCollector;
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.ToolProvider;
+
+import org.onap.policy.apex.core.infrastructure.java.JavaHandlingException;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class SingleClassBuilder is used to compile the Java code for a Java object and to create an instance of the
+ * object.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class SingleClassBuilder {
+ // Logger for this class
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(SingleClassBuilder.class);
+
+ // The class name and source code for the class that we are compiling and instantiating
+ private final String className;
+ private final String sourceCode;
+
+ // This specialized JavaFileManager handles class loading for the single Java class
+ private SingleFileManager singleFileManager = null;
+
+ /**
+ * Instantiates a new single class builder.
+ *
+ * @param className the class name
+ * @param sourceCode the source code
+ */
+ public SingleClassBuilder(final String className, final String sourceCode) {
+ // Save the fields of the class
+ this.className = className;
+ this.sourceCode = sourceCode;
+ }
+
+ /**
+ * Compile the single class into byte code.
+ *
+ * @throws JavaHandlingException Thrown on compilation errors or handling errors on the single Java class
+ */
+ public void compile() throws JavaHandlingException {
+ // Get the list of compilation units, there is only one here
+ final List<? extends JavaFileObject> compilationUnits =
+ Arrays.asList(new SingleClassCompilationUnit(className, sourceCode));
+
+ // Allows us to get diagnostics from the compilation
+ final DiagnosticCollector<JavaFileObject> diagnosticListener = new DiagnosticCollector<>();
+
+ // Get the Java compiler
+ final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
+
+ // Set up the target file manager and call the compiler
+ singleFileManager = new SingleFileManager(compiler, new SingleClassByteCodeFileObject(className));
+ final JavaCompiler.CompilationTask task =
+ compiler.getTask(null, singleFileManager, diagnosticListener, null, null, compilationUnits);
+
+ // Check if the compilation worked
+ if (!task.call()) {
+ final StringBuilder builder = new StringBuilder();
+ for (final Diagnostic<? extends JavaFileObject> diagnostic : diagnosticListener.getDiagnostics()) {
+ builder.append("code:");
+ builder.append(diagnostic.getCode());
+ builder.append(", kind:");
+ builder.append(diagnostic.getKind());
+ builder.append(", position:");
+ builder.append(diagnostic.getPosition());
+ builder.append(", start position:");
+ builder.append(diagnostic.getStartPosition());
+ builder.append(", end position:");
+ builder.append(diagnostic.getEndPosition());
+ builder.append(", source:");
+ builder.append(diagnostic.getSource());
+ builder.append(", message:");
+ builder.append(diagnostic.getMessage(null));
+ builder.append("\n");
+ }
+
+ LOGGER.warn("error compiling Java code for class \"" + className + "\": " + builder.toString());
+ throw new JavaHandlingException(
+ "error compiling Java code for class \"" + className + "\": " + builder.toString());
+ }
+ }
+
+ /**
+ * Create a new instance of the Java class using its byte code definition.
+ *
+ * @return A new instance of the object
+ * @throws InstantiationException if an instance of the object cannot be created, for example if the class has no
+ * default constructor
+ * @throws IllegalAccessException the caller does not have permission to call the class
+ * @throws ClassNotFoundException the byte code for the class is not found in the class loader
+ * @throws JavaHandlingException the java handling exception if the Java class source code is not compiled
+ */
+ public Object createObject()
+ throws InstantiationException, IllegalAccessException, ClassNotFoundException, JavaHandlingException {
+ if (singleFileManager == null) {
+ LOGGER.warn("error instantiating instance for class \"" + className + "\": code may not be compiled");
+ throw new JavaHandlingException(
+ "error instantiating instance for class \"" + className + "\": code may not be compiled");
+ }
+
+ return singleFileManager.getClassLoader(null).findClass(className).newInstance();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.core.infrastructure.java.compile.singleclass;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+
+import javax.tools.SimpleJavaFileObject;
+
+/**
+ * The Class SingleClassByteCodeFileObject is a specialization of the {@link SimpleJavaFileObject} class, which is
+ * itself an implementation of the {@code JavaFileObject} interface, which provides a file abstraction for tools
+ * operating on Java programming language source and class files. The {@link SimpleJavaFileObject} class provides simple
+ * implementations for most methods in {@code JavaFileObject}. This class is designed to be sub classed and used as a
+ * basis for {@code JavaFileObject} implementations. Subclasses can override the implementation and specification of any
+ * method of this class as long as the general contract of {@code JavaFileObject} is obeyed.
+ *
+ * This class holds the byte code for a single class in memory.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class SingleClassByteCodeFileObject extends SimpleJavaFileObject {
+
+ // The ByteArrayOutputStream holds the byte code for the class
+ private ByteArrayOutputStream byteArrayOutputStream;
+
+ /**
+ * Instantiates the byte code for the class in memory.
+ *
+ * @param className the class name is used to compose a URI for the class
+ */
+ public SingleClassByteCodeFileObject(final String className) {
+ super(URI.create("byte:///" + className + ".class"), Kind.CLASS);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.SimpleJavaFileObject#openOutputStream()
+ */
+ @Override
+ public OutputStream openOutputStream() {
+ // Create the byte array output stream that will hold the byte code for the class, when the class source code is
+ // compiled, this output stream is passed
+ // to the compiler and the byte code for the class is written into the output stream.
+ byteArrayOutputStream = new ByteArrayOutputStream();
+ return byteArrayOutputStream;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.SimpleJavaFileObject#openInputStream()
+ */
+ @Override
+ public InputStream openInputStream() {
+ // No input stream for streaming out the byte code
+ return null;
+ }
+
+ /**
+ * Gets the byte code of the class.
+ *
+ * @return the byte code of the class
+ */
+ public byte[] getByteCode() {
+ return byteArrayOutputStream.toByteArray();
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.core.infrastructure.java.compile.singleclass;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+
+import javax.tools.SimpleJavaFileObject;
+
+/**
+ * The Class SingleClassCompilationUnit is a container for the source code of the single Java class in memory. The class
+ * uses a {@link String} to hold the source code.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class SingleClassCompilationUnit extends SimpleJavaFileObject {
+
+ private final String source;
+
+ /**
+ * Instantiates a new compilation unit.
+ *
+ * @param className the class name for the source code
+ * @param source the source code for the class
+ */
+ public SingleClassCompilationUnit(final String className, final String source) {
+ // Create a URI for the source code of the class
+ super(URI.create("file:///" + className + ".java"), Kind.SOURCE);
+ this.source = source;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.SimpleJavaFileObject#getCharContent(boolean)
+ */
+ @Override
+ public CharSequence getCharContent(final boolean ignoreEncodingErrors) {
+ // Return the source code to toe caller, the compiler
+ return source;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.SimpleJavaFileObject#openOutputStream()
+ */
+ @Override
+ public OutputStream openOutputStream() {
+ throw new IllegalStateException();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.SimpleJavaFileObject#openInputStream()
+ */
+ @Override
+ public InputStream openInputStream() {
+ // Return the source code as a stream
+ return new ByteArrayInputStream(source.getBytes());
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.core.infrastructure.java.compile.singleclass;
+
+/**
+ * The Class SingleClassLoader is responsible for class loading the single Java class being held in memory.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class SingleClassLoader extends ClassLoader {
+ // The byte code of the class held in memory as byte code in a ByteCodeFileObject
+ private final SingleClassByteCodeFileObject byteCodeFileObject;
+
+ /**
+ * Instantiates a new single class loader to load the byte code of the class that is being held in memory.
+ *
+ * @param byteCodeFileObject the byte code of the class
+ */
+ public SingleClassLoader(final SingleClassByteCodeFileObject byteCodeFileObject) {
+ this.byteCodeFileObject = byteCodeFileObject;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.ClassLoader#findClass(java.lang.String)
+ */
+ @Override
+ protected Class<?> findClass(final String className) throws ClassNotFoundException {
+ // Creates a java Class that can be instantiated from the class defined in the byte code in the
+ // ByteCodeFileObejct
+ return defineClass(className, byteCodeFileObject.getByteCode(), 0, byteCodeFileObject.getByteCode().length);
+ }
+
+ /**
+ * Gets the file object.
+ *
+ * @return the file object
+ */
+ SingleClassByteCodeFileObject getFileObject() {
+ return byteCodeFileObject;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.core.infrastructure.java.compile.singleclass;
+
+import java.io.IOException;
+
+import javax.tools.FileObject;
+import javax.tools.ForwardingJavaFileManager;
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.StandardJavaFileManager;
+
+/**
+ * The Class SingleFileManager is a {@link ForwardingJavaFileManager} which in turn implements {@code JavaFileManager}.
+ * A {@code JavaFileManager} handles source files for Java language handling tools. A {@link ForwardingJavaFileManager}
+ * is an implementation of {@code JavaFileManager} that forwards the {@code JavaFileManager} methods to a given file
+ * manager.
+ *
+ * This class instantiates and forwards those requests to a {@link StandardJavaFileManager} instance to act as a
+ * {@code JavaFileManager} for a Java single file, managing class loading for the class.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class SingleFileManager extends ForwardingJavaFileManager<StandardJavaFileManager> {
+ // THe class loader for our single class
+ private final SingleClassLoader singleClassLoader;
+
+ /**
+ * Instantiates a new single file manager.
+ *
+ * @param compiler the compiler we are using
+ * @param byteCodeFileObject the byte code for the compiled class
+ */
+ public SingleFileManager(final JavaCompiler compiler, final SingleClassByteCodeFileObject byteCodeFileObject) {
+ super(compiler.getStandardFileManager(null, null, null));
+ singleClassLoader = new SingleClassLoader(byteCodeFileObject);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.ForwardingJavaFileManager#getJavaFileForOutput(javax.tools.JavaFileManager.Location,
+ * java.lang.String, javax.tools.JavaFileObject.Kind, javax.tools.FileObject)
+ */
+ @Override
+ public JavaFileObject getJavaFileForOutput(final Location notUsed, final String className,
+ final JavaFileObject.Kind kind, final FileObject sibling) throws IOException {
+ // Return the JavaFileObject to the compiler so that it can write byte code into it
+ return singleClassLoader.getFileObject();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see javax.tools.ForwardingJavaFileManager#getClassLoader(javax.tools.JavaFileManager.Location)
+ */
+ @Override
+ public SingleClassLoader getClassLoader(final Location location) {
+ return singleClassLoader;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Generates classes from source code by compiling source code and placing the resultant classes on the class path on
+ * the fly.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.core.infrastructure.java.compile.singleclass;
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+
+<configuration debug="false">
+
+ <contextName>Apex</contextName>
+ <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
+ <property name="VAR_LOG" value="/var/log/ericsson/apex/" />
+
+ <!-- USE FOR STD OUT ONLY -->
+ <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+ <encoder>
+ <Pattern>%d %contextName [%t] %level %logger{36} - %msg%n</Pattern>
+ </encoder>
+ </appender>
+
+ <root level="info">
+ <appender-ref ref="STDOUT" />
+ </root>
+
+ <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
+ <file>${VAR_LOG}/apex.log</file>
+ <encoder>
+ <pattern>%d %-5relative [procId=${processId}] [%thread] %-5level
+ %logger{26} - %msg %n %ex{full}</pattern>
+ </encoder>
+ </appender>
+
+ <logger name="org.onap.policy.apex" level="info" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+</configuration>
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+import org.junit.Test;
+import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageClient;
+import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageServer;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class EndToEndMessagingTest.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EndToEndStringMessagingTest {
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(EndToEndStringMessagingTest.class);
+
+ private WSStringMessageServer server;
+ private WSStringMessageClient client;
+
+ private boolean finished = false;
+
+ @Test
+ public void testEndToEndMessaging() throws MessagingException {
+ logger.debug("end to end messaging test starting . . .");
+ server = new WSStringMessageServer(44441);
+ assertNotNull(server);
+ server.start(new WSStringServerMessageListener());
+
+ client = new WSStringMessageClient("localhost", 44441);
+ assertNotNull(client);
+ client.start(new WSStringClientMessageListener());
+
+ client.sendString("Hello, client here");
+
+ while (!finished) {
+ ThreadUtilities.sleep(50);
+ }
+ client.stop();
+
+ server.stop();
+ logger.debug("end to end messaging test finished");
+ }
+
+ private class WSStringServerMessageListener implements WSStringMessageListener {
+ @Override
+ public void receiveString(final String stringMessage) {
+ logger.debug(stringMessage);
+ assertEquals("Hello, client here", stringMessage);
+ server.sendString("Hello back from server");
+ }
+ }
+
+ private class WSStringClientMessageListener implements WSStringMessageListener {
+ @Override
+ public void receiveString(final String stringMessage) {
+ logger.debug(stringMessage);
+ assertEquals("Hello back from server", stringMessage);
+ finished = true;
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+import static org.junit.Assert.assertNotNull;
+
+import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageListener;
+import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageServer;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+
+public class StringTestServer {
+ private WSStringMessageServer server;
+
+ public StringTestServer(final int port, long timeToLive) throws MessagingException {
+ System.out.println("StringTestServer starting on port " + port + " for " + timeToLive + " seconds . . .");
+ server = new WSStringMessageServer(port);
+ assertNotNull(server);
+ server.start(new WSStringServerMessageListener());
+
+ System.out.println("StringTestServer started on port " + port + " for " + timeToLive + " seconds");
+
+ for (; timeToLive > 0; timeToLive--) {
+ ThreadUtilities.sleep(1000);
+ }
+
+ server.stop();
+ System.out.println("StringTestServer completed");
+ }
+
+ private class WSStringServerMessageListener implements WSStringMessageListener {
+ @Override
+ public void receiveString(final String stringMessage) {
+ System.out.println("Server received string \"" + stringMessage + "\"");
+ server.sendString("Server echoing back the message: \"" + stringMessage + "\"");
+ }
+ }
+
+ public static void main(final String[] args) throws MessagingException {
+ if (args.length != 2) {
+ System.err.println("Usage: StringTestServer port timeToLive");
+ return;
+ }
+
+ int port = 0;
+ try {
+ port = Integer.parseInt(args[0]);
+ } catch (final Exception e) {
+ System.err.println("Usage: StringTestServer port timeToLive");
+ e.printStackTrace();
+ return;
+ }
+
+ long timeToLive = 0;
+ try {
+ timeToLive = Long.parseLong(args[1]);
+ } catch (final Exception e) {
+ System.err.println("Usage: StringTestServer port timeToLive");
+ e.printStackTrace();
+ return;
+ }
+
+ new StringTestServer(port, timeToLive);
+
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.messaging;
+
+import com.google.common.eventbus.Subscribe;
+
+import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The listener interface for receiving testMessage events. The class that is interested in processing a testMessage
+ * event implements this interface, and the object created with that class is registered with a component using the
+ * component's <code>addTestMessageListener</code> method. When the testMessage event occurs, that object's appropriate
+ * method is invoked.
+ *
+ */
+public abstract class TestMessageListener implements MessageListener<String> {
+
+ /** The Constant logger. */
+ private static final XLogger logger = XLoggerFactory.getXLogger(TestMessageListener.class);
+
+ /**
+ * On command.
+ *
+ * @param data the data
+ */
+ public abstract void onCommand(MessageBlock<String> data);
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.infrastructure.messaging.MessageListener#onMessage(org.onap.policy.apex.core.
+ * infrastructure. messaging.impl.ws.data.Data)
+ */
+ @Subscribe
+ @Override
+ public final void onMessage(final MessageBlock<String> data) {
+ if (data != null) {
+ if (logger.isDebugEnabled()) {
+ logger.debug("{} command recieved from machine {} ", data.getMessages().size(),
+ data.getConnection().getRemoteSocketAddress().getHostString());
+ }
+ onCommand(data);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.threading;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class ThreadingTest.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ThreadingTest {
+
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(ThreadingTest.class);
+
+ /**
+ * Test thread factory initialization.
+ */
+ @Test
+ public void testThreadFactoryInitialization() {
+ final ApplicationThreadFactory threadFactory0 = new ApplicationThreadFactory("localName", 0);
+ assertNotNull("Failed to create ApplicationThreadFactory threadFactory0", threadFactory0);
+ logger.debug(threadFactory0.toString());
+ assertTrue("Failed to name ApplicationThreadFactory threadFactory0",
+ threadFactory0.getName().startsWith("Apex-localName"));
+ final ApplicationThreadFactory threadFactory1 = new ApplicationThreadFactory("localName", 0);
+ assertNotNull("Failed to create ApplicationThreadFactory threadFactory1", threadFactory1);
+ logger.debug(threadFactory1.toString());
+ assertTrue("Failed to name ApplicationThreadFactory threadFactory1",
+ threadFactory1.getName().startsWith("Apex-localName"));
+
+ testThreadFactory(threadFactory0, 0);
+ testThreadFactory(threadFactory1, 1);
+ }
+
+ /**
+ * Test thread factory.
+ *
+ * @param threadFactory the thread factory
+ * @param factoryId the factory id
+ */
+ private void testThreadFactory(final ApplicationThreadFactory threadFactory, final int factoryId) {
+ final List<ThreadingTestThread> threadList = new ArrayList<ThreadingTestThread>();
+
+ for (int i = 0; i < 5; i++) {
+ threadList.add(new ThreadingTestThread());
+ threadList.get(i).setThread(threadFactory.newThread(threadList.get(i)));
+ assertTrue(threadList.get(i).getName().startsWith("Apex-localName"));
+ assertTrue(threadList.get(i).getName().contains(":" + i));
+ threadList.get(i).getThread().start();
+ }
+
+ // Threads should need a little more than 300ms to count to 3
+ ThreadUtilities.sleep(380);
+
+ for (int i = 0; i < 5; i++) {
+ threadList.get(i).interrupt();
+ }
+
+ for (int i = 0; i < 5; i++) {
+ assertTrue("Thread (" + i + ") failed to get count (" + threadList.get(i).getCounter() + ") up to 3",
+ threadList.get(i).getCounter() == 3);
+ }
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.infrastructure.threading;
+
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class ThreadingTestThread.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ThreadingTestThread implements Runnable {
+
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(ThreadingTestThread.class);
+
+ private boolean interrupted = false;
+
+ private long counter = -1;
+
+ private Thread thread = null;
+
+ /**
+ * Sets the thread.
+ *
+ * @param thread the new thread
+ */
+ public void setThread(final Thread thread) {
+ this.thread = thread;
+ }
+
+ /**
+ * Gets the thread.
+ *
+ * @return the thread
+ */
+ public Thread getThread() {
+ return thread;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Runnable#run()
+ */
+ @Override
+ public void run() {
+ if (logger.isDebugEnabled()) {
+ logger.debug("starting threading test thread \"" + thread.getName() + "\" . . .");
+ }
+
+ while (!interrupted) {
+ counter++;
+ if (logger.isDebugEnabled()) {
+ logger.debug("in threading test thread \"" + thread.getName() + "\", counter=" + counter + " . . .");
+ }
+
+ if (!ThreadUtilities.sleep(100)) {
+ interrupted = true;
+ }
+ }
+ if (logger.isDebugEnabled()) {
+ logger.debug("stopped threading test thread \"" + thread.getName() + "\"");
+ }
+ }
+
+ /**
+ * Gets the name.
+ *
+ * @return the name
+ */
+ public String getName() {
+ return thread.getName();
+ }
+
+ /**
+ * Interrupt.
+ */
+ public void interrupt() {
+ interrupted = true;
+ }
+
+ /**
+ * Gets the counter.
+ *
+ * @return the counter
+ */
+ public Long getCounter() {
+ return counter;
+ }
+}
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+
+<configuration>
+
+ <contextName>Apex</contextName>
+ <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
+ <property name="LOG_DIR" value="${java.io.tmpdir}/apex_logging/" />
+
+ <!-- USE FOR STD OUT ONLY -->
+ <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+ <encoder>
+ <Pattern>%d %contextName [%t] %level %logger{36} - %msg%n</Pattern>
+ </encoder>
+ </appender>
+
+ <root level="INFO">
+ <appender-ref ref="STDOUT" />
+ </root>
+
+ <logger name="org.infinispan" level="INFO" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+
+ <logger name="org.apache.zookeeper.ClientCnxn" level="OFF" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+
+ <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+ <file>${LOG_DIR}/apex.log</file>
+ <encoder>
+ <pattern>%d %-5relative [procId=${processId}] [%thread] %-5level
+ %logger{26} - %msg %n %ex{full}</pattern>
+ </encoder>
+ </appender>
+
+ <appender name="CTXT_FILE" class="ch.qos.logback.core.FileAppender">
+ <file>${LOG_DIR}/apex_ctxt.log</file>
+ <encoder>
+ <pattern>%d %-5relative [procId=${processId}] [%thread] %-5level
+ %logger{26} - %msg %n %ex{full}</pattern>
+ </encoder>
+ </appender>
+
+ <logger name="org.onap.policy.apex.core.context.impl.monitoring" level="TRACE" additivity="false">
+ <appender-ref ref="CTXT_FILE" />
+ </logger>
+
+ <logger name="org.onap.policy.apex.core.context" level="INFO" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+</configuration>
--- /dev/null
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core</artifactId>
+ <version>2.0.0-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>core-protocols</artifactId>
+ <name>${project.artifactId}</name>
+ <description>Protocols used to transfer information between components in Apex</description>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.onap.policy.apex-pdp.model</groupId>
+ <artifactId>basic-model</artifactId>
+ <version>${project.version}</version>
+ </dependency>
+ </dependencies>
+</project>
\ No newline at end of file
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols;
+
+/**
+ * This interface is used to enforce a common type on actions in the Apex messasging protocol. Action types the Apex
+ * messaging protocol supports implement this interface.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public interface Action {
+
+ /**
+ * This method returns a string representation of each action.
+ *
+ * @return the action string
+ */
+ String getActionString();
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols;
+
+import java.io.Serializable;
+
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class Message is used to pass protocol messages between Apex components.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public abstract class Message implements Serializable {
+ private static final int HASH_PRIME = 31;
+
+ // Serialization ID
+ private static final long serialVersionUID = 2271443377544488309L;
+
+ // Default timeout on server side should be used
+ private static final int DEFAULT_REPLY_TIMEOUT = -1;
+
+ // The Action or message type of the message
+ private Action action = null;
+
+ // The artifact key of the artifact to which this message is related
+ private AxArtifactKey targetKey = null;
+
+ // The data of the message
+ private String messageData = null;
+
+ // The timeout time for replies in milliseconds
+ private int replyTimeout = DEFAULT_REPLY_TIMEOUT;
+
+ /**
+ * Instantiates a new message.
+ *
+ * @param action the action or message type of the message
+ * @param targetKey the artifact key of the artifact to which this message relates
+ */
+ public Message(final Action action, final AxArtifactKey targetKey) {
+ this(action, targetKey, null);
+ }
+
+ /**
+ * Instantiates a new message.
+ *
+ * @param action the action or message type of the message
+ * @param targetKey the artifact key of the artifact to which this message relates
+ * @param messageData the message data to deliver
+ */
+ public Message(final Action action, final AxArtifactKey targetKey, final String messageData) {
+ this.action = action;
+ this.targetKey = targetKey;
+ this.messageData = messageData;
+ }
+
+ /**
+ * Set the message timeout.
+ *
+ * @param replyTimeout the timeout on reply messages in milliseconds
+ */
+ public void setReplyTimeout(final int replyTimeout) {
+ this.replyTimeout = replyTimeout;
+ }
+
+ /**
+ * Sets the message data.
+ *
+ * @param messageData the new message data
+ */
+ public void setMessageData(final String messageData) {
+ this.messageData = messageData;
+ }
+
+ /**
+ * Append to the message data.
+ *
+ * @param newMessageData the message data
+ */
+ public void appendMessageData(final String newMessageData) {
+ if (this.messageData == null) {
+ this.messageData = newMessageData;
+ } else {
+ this.messageData += newMessageData;
+ }
+ }
+
+ /**
+ * Gets the artifact key of the target of the message.
+ *
+ * @return the target
+ */
+ public final AxArtifactKey getTarget() {
+ return targetKey;
+ }
+
+ /**
+ * Gets the artifact key name of the target of the message.
+ *
+ * @return the target name
+ */
+ public final String getTargetName() {
+ return targetKey.getName();
+ }
+
+ /**
+ * Gets the action or message type of this message.
+ *
+ * @return the action
+ */
+ public final Action getAction() {
+ return action;
+ }
+
+ /**
+ * Gets the message data.
+ *
+ * @return the message data
+ */
+ public final String getMessageData() {
+ return messageData;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#equals(java.lang.Object)
+ */
+ @Override
+ public boolean equals(final Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+
+ final Message message = (Message) o;
+
+ if (action != null ? !action.equals(message.action) : message.action != null) {
+ return false;
+ }
+ if (targetKey != null ? !targetKey.equals(message.targetKey) : message.targetKey != null) {
+ return false;
+ }
+ return !(messageData != null ? !messageData.equals(message.messageData) : message.messageData != null);
+
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#hashCode()
+ */
+ @Override
+ public int hashCode() {
+ int result = action != null ? action.hashCode() : 0;
+ result = HASH_PRIME * result + (targetKey != null ? targetKey.hashCode() : 0);
+ result = HASH_PRIME * result + (messageData != null ? messageData.hashCode() : 0);
+ return result;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "Message [action=" + action + ", targetKey=" + targetKey + ", data=" + messageData + "]";
+ }
+
+ /**
+ * Get the timeout to wait for a reply.
+ *
+ * @return the timeout in milliseconds
+ */
+ public int getReplyTimeout() {
+ return replyTimeout;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep;
+
+import org.onap.policy.apex.core.protocols.Action;
+
+/**
+ * Action types the EngDep messaging protocol supports.
+ *
+ * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
+ */
+public enum EngDepAction implements Action {
+ /** Action to get information on the running engine service. */
+ GET_ENGINE_SERVICE_INFO {
+ @Override
+ public String getActionString() {
+ return "Apex engine service information";
+ }
+ },
+ /** Action to update the policy model in an engine service. */
+ UPDATE_MODEL {
+ @Override
+ public String getActionString() {
+ return "update model on Apex engine service";
+ }
+ },
+ /** Action to start an engine service. */
+ START_ENGINE {
+ @Override
+ public String getActionString() {
+ return "starts an Apex engine";
+ }
+ },
+ /** Action to stop an engine service. */
+ STOP_ENGINE {
+ @Override
+ public String getActionString() {
+ return "stops an Apex engine service";
+ }
+ },
+ /** Action to start sending periodic events to an engine service. */
+ START_PERIODIC_EVENTS {
+ @Override
+ public String getActionString() {
+ return "starts periodic events on an Apex engine service";
+ }
+ },
+ /** Action to stop sending periodic events to an engine service. */
+ STOP_PERIODIC_EVENTS {
+ @Override
+ public String getActionString() {
+ return "stops periodic events on an Apex engine service";
+ }
+ },
+ /** Action to get the status of an engine in the engine service. */
+ GET_ENGINE_STATUS {
+ @Override
+ public String getActionString() {
+ return "gets the status of an Apex engine service";
+ }
+ },
+ /** Action to get information on an engine in the engine service. */
+ GET_ENGINE_INFO {
+ @Override
+ public String getActionString() {
+ return "gets runtime information an Apex engine service";
+ }
+ },
+ /** The response message to all actions. */
+ RESPONSE {
+ @Override
+ public String getActionString() {
+ return "response from Apex engine service";
+ }
+ };
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import java.util.Collection;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class Response is a message that holds the response by an Apex engine to another Actino message sent to that
+ * engine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class EngineServiceInfoResponse extends Response {
+ private static final long serialVersionUID = -7895025789667402067L;
+
+ // The engine service key
+ private AxArtifactKey engineServiceKey;
+
+ // The engines under the control of this engine service
+ private AxArtifactKey[] engineKeyArray;
+
+ // The engine service key
+ private AxArtifactKey apexModelKey;
+
+ /**
+ * Instantiates a new EngineServiceInfoResponse message.
+ *
+ * @param targetKey the target key of the entity that asked for the action that triggered this response message
+ * @param successful the successful if the action in the triggering message worked
+ * @param responseTo the message to which this message is a response
+ */
+ public EngineServiceInfoResponse(final AxArtifactKey targetKey, final boolean successful,
+ final Message responseTo) {
+ super(targetKey, successful, null, responseTo);
+ }
+
+ /**
+ * Instantiates a new EngineServiceInfoResponse message.
+ *
+ * @param targetKey the target key of the entity that asked for the action that triggered this response message
+ * @param successful the successful if the action in the triggering message worked
+ * @param messageData the message data which may indicate specific conditions for the response
+ * @param responseTo the message to which this message is a response
+ */
+ public EngineServiceInfoResponse(final AxArtifactKey targetKey, final boolean successful, final String messageData,
+ final Message responseTo) {
+ super(targetKey, successful, messageData, responseTo);
+ }
+
+ /**
+ * Gets the engine service key.
+ *
+ * @return the engine service key
+ */
+ public AxArtifactKey getEngineServiceKey() {
+ return engineServiceKey;
+ }
+
+ /**
+ * Sets the engine service key.
+ *
+ * @param engineServiceKey the engine service key
+ */
+ public void setEngineServiceKey(final AxArtifactKey engineServiceKey) {
+ this.engineServiceKey = engineServiceKey;
+ }
+
+ /**
+ * Gets the engine key array.
+ *
+ * @return the engine key array
+ */
+ public AxArtifactKey[] getEngineKeyArray() {
+ return engineKeyArray;
+ }
+
+ /**
+ * Sets the engine key array.
+ *
+ * @param engineKeyCollection the engine key array
+ */
+ public void setEngineKeyArray(final Collection<AxArtifactKey> engineKeyCollection) {
+ engineKeyArray = engineKeyCollection.toArray(new AxArtifactKey[engineKeyCollection.size()]);
+ }
+
+ /**
+ * Gets the apex model key.
+ *
+ * @return the apex model key
+ */
+ public AxArtifactKey getApexModelKey() {
+ return apexModelKey;
+ }
+
+ /**
+ * Sets the apex model key.
+ *
+ * @param apexModelKey the apex model key
+ */
+ public void setApexModelKey(final AxArtifactKey apexModelKey) {
+ this.apexModelKey = apexModelKey;
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class GetEngineInfo is a message that requests information on Apex engines and the policies they are running.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class GetEngineInfo extends Message {
+ private static final long serialVersionUID = 5885214410842753037L;
+
+ /**
+ * Instantiates a new GetEngineInfo message.
+ *
+ * @param engineKey the key the engine for which the runtime information is requested
+ */
+ public GetEngineInfo(final AxArtifactKey engineKey) {
+ this(engineKey, null);
+ }
+
+ /**
+ * Instantiates a new GetEngineInfo message.
+ *
+ * @param engineKey the key the engine for which the runtime information is requested
+ * @param messageData the message data that may give specifics on what information to return
+ */
+ public GetEngineInfo(final AxArtifactKey engineKey, final String messageData) {
+ super(EngDepAction.GET_ENGINE_INFO, engineKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "GetEngineInfo {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class GetEngineServiceInfo is a message that requests information on what is in an Apex engine service.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class GetEngineServiceInfo extends Message {
+ private static final long serialVersionUID = 5885214410842753037L;
+
+ /**
+ * Instantiates a new GetEngineServiceInfo message.
+ *
+ * @param nullKey not used, set to null
+ */
+ public GetEngineServiceInfo(final AxArtifactKey nullKey) {
+ this(nullKey, null);
+ }
+
+ /**
+ * Instantiates a new GetEngineServiceInfo message.
+ *
+ * @param nullKey not used, set to null
+ * @param messageData the message data that may give specifics on what information to return
+ */
+ public GetEngineServiceInfo(final AxArtifactKey nullKey, final String messageData) {
+ super(EngDepAction.GET_ENGINE_SERVICE_INFO, nullKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "GetEngineServiceInfo {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class GetEngineInfo is a message that requests information on Apex engines and the policies they are running.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class GetEngineStatus extends Message {
+ private static final long serialVersionUID = 5885214410842753037L;
+
+ /**
+ * Instantiates a new GetEngineStatus message.
+ *
+ * @param engineKey the key of the engine for which the status information is requested
+ */
+ public GetEngineStatus(final AxArtifactKey engineKey) {
+ this(engineKey, null);
+ }
+
+ /**
+ * Instantiates a new GetEngineStatus message.
+ *
+ * @param engineKey the key of the engine for which the status information is requested
+ * @param messageData the message data that may give specifics on what information to return
+ */
+ public GetEngineStatus(final AxArtifactKey engineKey, final String messageData) {
+ super(EngDepAction.GET_ENGINE_STATUS, engineKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "GetEngineStatus {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class Response is a message that holds the response by an Apex engine to another Actino message sent to that
+ * engine.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class Response extends Message {
+ private static final int HASH_PRIME = 31;
+
+ private static final long serialVersionUID = -4162385039044294476L;
+
+ private boolean successful = false;
+ private Message responseTo = null;
+
+ /**
+ * Instantiates a new Response message.
+ *
+ * @param targetKey the target key of the entity that asked for the action that triggered this response message
+ * @param successful the successful if the action in the triggering message worked
+ * @param responseTo the message to which this message is a response
+ */
+ public Response(final AxArtifactKey targetKey, final boolean successful, final Message responseTo) {
+ this(targetKey, successful, null, responseTo);
+ }
+
+ /**
+ * Instantiates a new Response message.
+ *
+ * @param targetKey the target key of the entity that asked for the action that triggered this response message
+ * @param successful the successful if the action in the triggering message worked
+ * @param messageData the message data which may indicate specific conditions for the response
+ * @param responseTo the message to which this message is a response
+ */
+ public Response(final AxArtifactKey targetKey, final boolean successful, final String messageData,
+ final Message responseTo) {
+ super(EngDepAction.RESPONSE, targetKey, messageData);
+ this.successful = successful;
+ this.responseTo = responseTo;
+ }
+
+ /**
+ * Checks if the action to which this is a response was successful.
+ *
+ * @return true, if is successful
+ */
+ public boolean isSuccessful() {
+ return successful;
+ }
+
+ /**
+ * Gets the message to which this message is a response to.
+ *
+ * @return the the message to which this message is a response to
+ */
+ public Message getResponseTo() {
+ return responseTo;
+ }
+
+ /**
+ * Compare this message to another Response message.
+ *
+ * @param otherMessage the other message
+ * @return true, if successful
+ */
+ public boolean equals(final Response otherMessage) {
+ return super.equals(otherMessage) && successful == otherMessage.successful
+ && responseTo.equals(otherMessage.responseTo);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.protocols.Message#equals(java.lang.Object)
+ */
+ @Override
+ public boolean equals(final Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+ if (!super.equals(o)) {
+ return false;
+ }
+
+ final Response response = (Response) o;
+
+ if (successful != response.successful) {
+ return false;
+ }
+ return !(responseTo != null ? !responseTo.equals(response.responseTo) : response.responseTo != null);
+
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.protocols.Message#hashCode()
+ */
+ @Override
+ public int hashCode() {
+ int result = super.hashCode();
+ result = HASH_PRIME * result + (successful ? 1 : 0);
+ result = HASH_PRIME * result + (responseTo != null ? responseTo.hashCode() : 0);
+ return result;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "Response {" + super.toString() + "}[successful=" + successful + "]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class StartEngine is a message that requests that an Apex engine in an engine service be started.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StartEngine extends Message {
+ private static final long serialVersionUID = 5885214410842753037L;
+
+ /**
+ * Instantiates a new StartEngine message.
+ *
+ * @param engineKey the key of the engine to start
+ */
+ public StartEngine(final AxArtifactKey engineKey) {
+ this(engineKey, null);
+ }
+
+ /**
+ * Instantiates a new StartEngine message.
+ *
+ * @param engineKey the key of the engine to start
+ * @param messageData the message data that may give specifics on what way to start
+ */
+ public StartEngine(final AxArtifactKey engineKey, final String messageData) {
+ super(EngDepAction.START_ENGINE, engineKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "StartEngine {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class StartEngine is a message that requests that an Apex engine in an engine service be started.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StartPeriodicEvents extends Message {
+ private static final long serialVersionUID = -9172376034035242135L;
+
+ /**
+ * Instantiates a new StartEngine message.
+ *
+ * @param engineKey the key of the engine to start
+ */
+ public StartPeriodicEvents(final AxArtifactKey engineKey) {
+ this(engineKey, null);
+ }
+
+ /**
+ * Instantiates a new StartEngine message.
+ *
+ * @param engineKey the key of the engine to start
+ * @param messageData the message data that may give specifics on what way to start
+ */
+ public StartPeriodicEvents(final AxArtifactKey engineKey, final String messageData) {
+ super(EngDepAction.START_PERIODIC_EVENTS, engineKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "StartPeriodicEvents {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class StopEngine is a message that requests that an Apex engine in an engine service be stopped.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StopEngine extends Message {
+ private static final long serialVersionUID = 5885214410842753037L;
+
+ /**
+ * Instantiates a new StopEngine message.
+ *
+ * @param engineKey the key of the engine to stop
+ */
+ public StopEngine(final AxArtifactKey engineKey) {
+ this(engineKey, null);
+ }
+
+ /**
+ * Instantiates a new StopEngine message.
+ *
+ * @param engineKey the key of the engine to stop
+ * @param messageData the message data that may give specifics on what way to stop
+ */
+ public StopEngine(final AxArtifactKey engineKey, final String messageData) {
+ super(EngDepAction.STOP_ENGINE, engineKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "StopEngine {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class StopEngine is a message that requests that an Apex engine in an engine service be stopped.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class StopPeriodicEvents extends Message {
+ private static final long serialVersionUID = -1796422638427413285L;
+
+ /**
+ * Instantiates a new StopEngine message.
+ *
+ * @param engineKey the key of the engine to stop
+ */
+ public StopPeriodicEvents(final AxArtifactKey engineKey) {
+ this(engineKey, null);
+ }
+
+ /**
+ * Instantiates a new StopEngine message.
+ *
+ * @param engineKey the key of the engine to stop
+ * @param messageData the message data that may give specifics on what way to stop
+ */
+ public StopPeriodicEvents(final AxArtifactKey engineKey, final String messageData) {
+ super(EngDepAction.STOP_PERIODIC_EVENTS, engineKey, messageData);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "StopPeriodicEvents {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
+
+import org.onap.policy.apex.core.protocols.Message;
+import org.onap.policy.apex.core.protocols.engdep.EngDepAction;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+
+/**
+ * The Class UpdateModel is a message that requests an Apex engine to update its model using the data provided in the
+ * message.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class UpdateModel extends Message {
+ private static final long serialVersionUID = 5885214410842753037L;
+
+ // The reply timeout value for update messages
+ private static final int UPDATE_MODEL_REPLY_TIMEOUT = 30000;
+
+ // Flags indicating whether conflicts in context should be ignored and whether the model should be forced even if it
+ // is incompatible
+ private boolean ignoreConflicts = false;
+ private boolean forceInstall = false;
+
+ /**
+ * Instantiates a new update model message.
+ *
+ * @param engineServiceKey the key of the engine service in which the model of all engines will be updated
+ */
+ public UpdateModel(final AxArtifactKey engineServiceKey) {
+ this(engineServiceKey, null, false, false);
+ }
+
+ /**
+ * Instantiates a new update model message.
+ *
+ * @param engineServiceKey the key of the engine service in which the model of all engines will be updated
+ * @param messageData the message data that indicates to the Apex engine the manner in which its model should be
+ * updated
+ * @param ignoreConflicts true if conflicts between context in polices is to be ignored
+ * @param force true if the model is to be applied even if it is incompatible with the existing model
+ */
+ public UpdateModel(final AxArtifactKey engineServiceKey, final String messageData, final boolean ignoreConflicts,
+ final boolean force) {
+ super(EngDepAction.UPDATE_MODEL, engineServiceKey, messageData);
+
+ this.ignoreConflicts = ignoreConflicts;
+ this.forceInstall = force;
+
+ // Update messages have a longer timeout
+ setReplyTimeout(UPDATE_MODEL_REPLY_TIMEOUT);
+ }
+
+ /**
+ * Check if context conflicts should be ignored.
+ *
+ * @return true if conflicts should be ignored
+ */
+ public boolean isIgnoreConflicts() {
+ return ignoreConflicts;
+ }
+
+ /**
+ * Check if version checks should be overridden.
+ *
+ * @return true if version checks should be overridden
+ */
+ public boolean isForceInstall() {
+ return forceInstall;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.core.model.protocols.Message#toString()
+ */
+ @Override
+ public String toString() {
+ return "UpdateModel {" + super.toString() + "}[]";
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides classes that define the EngDep messages.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.protocols.engdep.messages;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the EngDep protocol for communication between the APEX Engine and Apex deployment.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.protocols.engdep;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Contains protocols that are used for communication in APEX.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.core.protocols;
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.net.UnknownHostException;
+
+import org.junit.Test;
+import org.onap.policy.apex.core.protocols.engdep.messages.GetEngineStatus;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class GetExecutionStatusTest.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class GetExecutionStatusTest {
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(GetExecutionStatusTest.class);
+
+ GetEngineStatus message = null;
+
+ /**
+ * Test register entity.
+ *
+ * @throws UnknownHostException the unknown host exception
+ */
+ @Test
+ public void testRegisterEntity() throws UnknownHostException {
+ final AxArtifactKey targetKey = new AxArtifactKey("UpdateModelTest", "0.0.1");
+ message = new GetEngineStatus(targetKey);
+ assertNotNull(message);
+ logger.debug(message.toString());
+ assertTrue((message.toString()).contains("UpdateModelTest"));
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.net.UnknownHostException;
+
+import org.junit.Test;
+import org.onap.policy.apex.core.protocols.engdep.messages.GetEngineStatus;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class GetPolicyStatusTest.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class GetPolicyStatusTest {
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(GetPolicyStatusTest.class);
+
+ GetEngineStatus message = null;
+
+ /**
+ * Test register entity.
+ *
+ * @throws UnknownHostException the unknown host exception
+ */
+ @Test
+ public void testRegisterEntity() throws UnknownHostException {
+ final AxArtifactKey targetKey = new AxArtifactKey("PolicyStatusTest", "0.0.1");
+ message = new GetEngineStatus(targetKey);
+ assertNotNull(message);
+ logger.debug(message.toString());
+ assertTrue((message.toString()).contains("PolicyStatusTest"));
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.net.UnknownHostException;
+
+import org.junit.Test;
+import org.onap.policy.apex.core.protocols.engdep.messages.Response;
+import org.onap.policy.apex.core.protocols.engdep.messages.UpdateModel;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class ResponseTest.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ResponseTest {
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(ResponseTest.class);
+
+ Response message = null;
+
+ /**
+ * Test response.
+ *
+ * @throws UnknownHostException the unknown host exception
+ */
+ @Test
+ public void testResponse() throws UnknownHostException {
+ final AxArtifactKey responseKey = new AxArtifactKey("ResponseTest", "0.0.1");
+ final AxArtifactKey responseToKey = new AxArtifactKey("ResponseTestTO", "0.0.1");
+ message = new Response(responseKey, false, new UpdateModel(responseToKey));
+ logger.debug(message.toString());
+ assertTrue(message.toString().contains("ResponseTest"));
+ assertFalse(message.isSuccessful());
+
+ message = new Response(responseKey, true, new UpdateModel(responseToKey));
+ logger.debug(message.toString());
+ assertTrue(message.toString().contains("ResponseTest"));
+ assertTrue(message.isSuccessful());
+ }
+}
--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.protocols.engdep;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.net.UnknownHostException;
+
+import org.junit.Test;
+import org.onap.policy.apex.core.protocols.engdep.messages.UpdateModel;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class UpdateModelTest.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class UpdateModelTest {
+ // Logger for this class
+ private static final XLogger logger = XLoggerFactory.getXLogger(UpdateModelTest.class);
+
+ UpdateModel message = null;
+
+ /**
+ * Test register entity.
+ *
+ * @throws UnknownHostException the unknown host exception
+ */
+ @Test
+ public void testRegisterEntity() throws UnknownHostException {
+ final AxArtifactKey targetKey = new AxArtifactKey("UpdateModelTest", "0.0.1");
+ message = new UpdateModel(targetKey, new String("Placeholder for Apex model XML"), false, false);
+ assertNotNull(message);
+ logger.debug(message.toString());
+ assertTrue((message.toString()).contains("Placeholder for Apex model XML"));
+ }
+}
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+
+<configuration>
+
+ <contextName>Apex</contextName>
+ <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
+ <property name="LOG_DIR" value="${java.io.tmpdir}/apex_logging/" />
+
+ <!-- USE FOR STD OUT ONLY -->
+ <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+ <encoder>
+ <Pattern>%d %contextName [%t] %level %logger{36} - %msg%n</Pattern>
+ </encoder>
+ </appender>
+
+ <root level="INFO">
+ <appender-ref ref="STDOUT" />
+ </root>
+
+ <logger name="org.infinispan" level="INFO" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+
+ <logger name="org.apache.zookeeper.ClientCnxn" level="OFF" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+
+ <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+ <file>${LOG_DIR}/apex.log</file>
+ <encoder>
+ <pattern>%d %-5relative [procId=${processId}] [%thread] %-5level
+ %logger{26} - %msg %n %ex{full}</pattern>
+ </encoder>
+ </appender>
+
+ <appender name="CTXT_FILE" class="ch.qos.logback.core.FileAppender">
+ <file>${LOG_DIR}/apex_ctxt.log</file>
+ <encoder>
+ <pattern>%d %-5relative [procId=${processId}] [%thread] %-5level
+ %logger{26} - %msg %n %ex{full}</pattern>
+ </encoder>
+ </appender>
+
+ <logger name="org.onap.policy.apex.core.context.impl.monitoring" level="TRACE" additivity="false">
+ <appender-ref ref="CTXT_FILE" />
+ </logger>
+
+ <logger name="org.onap.policy.apex.core.context" level="INFO" additivity="false">
+ <appender-ref ref="STDOUT" />
+ </logger>
+</configuration>
--- /dev/null
+<!--
+ ============LICENSE_START=======================================================
+ Copyright (C) 2018 Ericsson. All rights reserved.
+ ================================================================================
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ SPDX-License-Identifier: Apache-2.0
+ ============LICENSE_END=========================================================
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>org.onap.policy.apex-pdp</groupId>
+ <artifactId>apex-pdp</artifactId>
+ <version>2.0.0-SNAPSHOT</version>
+ </parent>
+
+ <groupId>org.onap.policy.apex-pdp.core</groupId>
+ <artifactId>core</artifactId>
+ <packaging>pom</packaging>
+
+ <name>${project.artifactId}</name>
+ <description>The main core of Apex, deployment independent.</description>
+
+ <modules>
+ <module>core-infrastructure</module>
+ <module>core-protocols</module>
+ <module>core-engine</module>
+ <module>core-deployment</module>
+ </modules>
+</project>
\ No newline at end of file
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
- *
+ *
* http://www.apache.org/licenses/LICENSE-2.0
- *
+ *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
- *
+ *
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
}
stats.executionExit();
final double avExecutionTime = stats.getAverageExecutionTime();
- assertTrue(avExecutionTime >= 2.0 && avExecutionTime < 3.0);
+ assertTrue(avExecutionTime >= 2.0 && avExecutionTime < 10.0);
stats.engineStop();
AxValidationResult result = new AxValidationResult();
<modules>
<module>model</module>
<module>context</module>
+ <module>core</module>
<module>auth</module>
</modules>
</project>
\ No newline at end of file
Code Review / policy / apex-pdp.git / commitdiff