2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.plugins.executor.java;
23 import java.lang.reflect.Method;
24 import java.util.Properties;
26 import org.onap.policy.apex.context.ContextException;
27 import org.onap.policy.apex.core.engine.event.EnEvent;
28 import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
29 import org.onap.policy.apex.core.engine.executor.context.TaskSelectionExecutionContext;
30 import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
31 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
32 import org.slf4j.ext.XLogger;
33 import org.slf4j.ext.XLoggerFactory;
36 * The Class JavaTaskSelectExecutor is the task selection executor for task selection logic written in Java.
38 * @author Liam Fallon (liam.fallon@ericsson.com)
40 public class JavaTaskSelectExecutor extends TaskSelectExecutor {
41 // Logger for this class
42 private static final XLogger LOGGER = XLoggerFactory.getXLogger(JavaTaskSelectExecutor.class);
44 // The Java Task Selection executor class
45 private Object taskSelectionLogicObject = null;
48 * Prepares the task for processing.
50 * @throws StateMachineException thrown when a state machine execution error occurs
53 public void prepare() throws StateMachineException {
54 // Call generic prepare logic
57 // Get the class for task selection
59 // Create the task logic object from the byte code of the class
60 taskSelectionLogicObject = Class.forName(getSubject().getTaskSelectionLogic().getLogic()).newInstance();
61 } catch (final Exception e) {
63 "instantiation error on Java class \"" + getSubject().getTaskSelectionLogic().getLogic() + "\"", e);
64 throw new StateMachineException(
65 "instantiation error on Java class \"" + getSubject().getTaskSelectionLogic().getLogic() + "\"", e);
70 * Executes the executor for the task in a sequential manner.
72 * @param executionId the execution ID for the current APEX policy execution
73 * @param executionProperties properties for the current APEX policy execution
74 * @param incomingEvent the incoming event
75 * @return The outgoing event
76 * @throws StateMachineException on an execution error
77 * @throws ContextException on context errors
80 public AxArtifactKey execute(final long executionId, final Properties executionProperties,
81 final EnEvent incomingEvent) throws StateMachineException, ContextException {
82 // Do execution pre work
83 executePre(executionId, executionProperties, incomingEvent);
85 // Check and execute the Java logic
86 boolean returnValue = false;
88 // Find and call the method with the signature "public boolean getTask(final TaskSelectionExecutionContext
89 // executor)" to invoke the task selection
90 // logic in the Java class
91 final Method method = taskSelectionLogicObject.getClass().getDeclaredMethod("getTask",
92 new Class[] { TaskSelectionExecutionContext.class });
93 returnValue = (boolean) method.invoke(taskSelectionLogicObject, getExecutionContext());
94 } catch (final Exception e) {
96 "execute: task selection logic failed to run for state \"" + getSubject().getKey().getId() + "\"",
98 throw new StateMachineException(
99 "task selection logic failed to run for state \"" + getSubject().getKey().getId() + "\"", e);
102 // Do the execution post work
103 executePost(returnValue);
105 // Send back the return event
106 return getOutgoing();
110 * Cleans up the task after processing.
112 * @throws StateMachineException thrown when a state machine execution error occurs
115 public void cleanUp() throws StateMachineException {
116 LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + ","
117 + getSubject().getTaskSelectionLogic().getLogicFlavour() + ","
118 + getSubject().getTaskSelectionLogic().getLogic());