2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2021 Nordix Foundation.
4 * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.clamp.acm.participant.intermediary.handler;
24 import java.io.Closeable;
25 import java.io.IOException;
26 import java.util.List;
28 import org.onap.policy.clamp.acm.participant.intermediary.parameters.ParticipantParameters;
29 import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
30 import org.onap.policy.common.endpoints.event.comm.TopicSink;
31 import org.onap.policy.common.endpoints.event.comm.TopicSource;
32 import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
33 import org.onap.policy.common.utils.services.ServiceManagerContainer;
34 import org.springframework.context.event.ContextClosedEvent;
35 import org.springframework.context.event.ContextRefreshedEvent;
36 import org.springframework.context.event.EventListener;
37 import org.springframework.stereotype.Component;
40 * This class activates the Participant Intermediary together with all its handlers.
43 public class IntermediaryActivator extends ServiceManagerContainer implements Closeable {
45 private static final String[] MSG_TYPE_NAMES = {"messageType"};
47 // Topics from which the participant receives and to which the participant sends messages
48 private List<TopicSink> topicSinks;
49 private List<TopicSource> topicSources;
51 private ParticipantHandler participantHandler;
54 private final MessageTypeDispatcher msgDispatcher;
57 * Instantiate the activator for participant.
59 * @param parameters the ParticipantParameters
60 * @param participantHandler the ParticipantHandler
61 * @param publishers list of Publishers
62 * @param listeners list of Listeners
64 public <T> IntermediaryActivator(final ParticipantParameters parameters, ParticipantHandler participantHandler,
65 List<Publisher> publishers, List<Listener<T>> listeners) {
66 this.participantHandler = participantHandler;
68 topicSinks = TopicEndpointManager.getManager().addTopicSinks(
69 parameters.getIntermediaryParameters().getClampAutomationCompositionTopics().getTopicSinks());
71 topicSources = TopicEndpointManager.getManager().addTopicSources(
72 parameters.getIntermediaryParameters().getClampAutomationCompositionTopics().getTopicSources());
74 msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES);
77 addAction("Topic endpoint management",
78 () -> TopicEndpointManager.getManager().start(),
79 () -> TopicEndpointManager.getManager().shutdown());
81 publishers.forEach(publisher ->
82 addAction("Publisher " + publisher.getClass().getSimpleName(),
83 () -> publisher.active(topicSinks),
86 listeners.forEach(listener ->
87 addAction("Listener " + listener.getClass().getSimpleName(),
88 () -> msgDispatcher.register(listener.getType(), listener.getScoListener()),
89 () -> msgDispatcher.unregister(listener.getType())));
91 addAction("Topic Message Dispatcher", this::registerMsgDispatcher, this::unregisterMsgDispatcher);
96 * Handle ContextRefreshEvent.
98 * @param ctxRefreshedEvent ContextRefreshedEvent
101 public void handleContextRefreshEvent(ContextRefreshedEvent ctxRefreshedEvent) {
104 sendParticipantRegister();
109 * Handle ContextClosedEvent.
111 * @param ctxClosedEvent ContextClosedEvent
114 public void handleContextClosedEvent(ContextClosedEvent ctxClosedEvent) {
116 sendParticipantDeregister();
121 private void sendParticipantRegister() {
122 participantHandler.sendParticipantRegister();
125 private void sendParticipantDeregister() {
126 participantHandler.sendParticipantDeregister();
130 * Registers the dispatcher with the topic source(s).
132 private void registerMsgDispatcher() {
133 for (final TopicSource source : topicSources) {
134 source.register(msgDispatcher);
139 * Unregisters the dispatcher from the topic source(s).
141 private void unregisterMsgDispatcher() {
142 for (final TopicSource source : topicSources) {
143 source.unregister(msgDispatcher);
148 public void close() throws IOException {