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.service.engine.engdep;
23 import java.net.InetSocketAddress;
25 import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
26 import org.onap.policy.apex.core.infrastructure.messaging.MessagingServiceFactory;
27 import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
28 import org.onap.policy.apex.core.protocols.Message;
29 import org.onap.policy.apex.service.engine.runtime.EngineService;
30 import org.slf4j.ext.XLogger;
31 import org.slf4j.ext.XLoggerFactory;
34 * The Class EngDepMessagingService is used to encapsulate the server side of EngDep communication. This class allows
35 * users to create and start an EngDep server.
37 * @author Liam Fallon (liam.fallon@ericsson.com)
39 public class EngDepMessagingService {
40 private static final XLogger LOGGER = XLoggerFactory.getXLogger(EngDepMessagingService.class);
42 private final MessagingService<Message> messageService;
44 // The listener that is listening for messages coming in on the EngDep protocol from clients
45 private final EngDepMessageListener messageListener;
48 * Instantiates a new EngDep messaging service. It creates the message service instance, a listener for incoming
49 * messages, and starts the message listener thread for handling incoming messages.
51 * @param service the Apex engine service that this EngDep service is running for
52 * @param port the port The port to use for EngDep communication
54 public EngDepMessagingService(final EngineService service, final int port) {
55 LOGGER.entry(service);
57 // Create the service and listener and add the listener.
58 messageService = getMessageService(port);
59 messageListener = new EngDepMessageListener(service);
60 messageService.addMessageListener(messageListener);
62 // Start incoming message processing on the listener
63 messageListener.startProcessorThread();
68 * Start the server, open the communication mechanism for connections.
71 LOGGER.info("engine<-->deployment messaging starting . . .");
72 messageService.startConnection();
73 LOGGER.info("engine<-->deployment messaging started");
77 * Start the server, close the communication mechanism.
80 LOGGER.info("engine<-->deployment messaging stopping . . .");
81 messageService.stopConnection();
82 messageListener.stopProcessorThreads();
83 LOGGER.info("engine<-->deployment messaging stopped");
87 * Is the server started?.
89 * @return true, if checks if is started
91 public boolean isStarted() {
92 return messageService.isStarted();
96 * Is the server stopped?.
98 * @return true, if checks if is stopped
100 public boolean isStopped() {
101 return !messageService.isStarted();
105 * Get a message service instance. This method is protected so that it can be intercepted in unit test.
106 * @param port the message service port
107 * @return the message service
109 protected MessagingService<Message> getMessageService(final int port) {
110 // Messaging service is used to transmit and receive messages over a communication protocol
111 MessagingServiceFactory<Message> factory = new MessagingServiceFactory<>();
112 return factory.createServer(new InetSocketAddress(MessagingUtils.checkPort(port)));