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.controlloop.participant.intermediary.handler;
24 import java.io.Closeable;
25 import java.io.IOException;
26 import java.util.List;
27 import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryApi;
28 import org.onap.policy.clamp.controlloop.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 ParticipantIntermediaryApi participantIntermediaryApi;
53 private final MessageTypeDispatcher msgDispatcher;
56 * Instantiate the activator for participant.
58 * @param parameters the ParticipantParameters
59 * @param publishers list of Publishers
60 * @param listeners list of Listeners
62 public <T> IntermediaryActivator(final ParticipantParameters parameters,
63 ParticipantIntermediaryApi participantIntermediaryApi, List<Publisher> publishers,
64 List<Listener<T>> listeners) {
65 this.participantIntermediaryApi = participantIntermediaryApi;
67 topicSinks = TopicEndpointManager.getManager()
68 .addTopicSinks(parameters.getIntermediaryParameters().getClampControlLoopTopics().getTopicSinks());
70 topicSources = TopicEndpointManager.getManager()
71 .addTopicSources(parameters.getIntermediaryParameters().getClampControlLoopTopics().getTopicSources());
73 msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES);
76 addAction("Topic endpoint management",
77 () -> TopicEndpointManager.getManager().start(),
78 () -> TopicEndpointManager.getManager().shutdown());
80 publishers.forEach(publisher ->
81 addAction("Publisher " + publisher.getClass().getSimpleName(),
82 () -> publisher.active(topicSinks),
85 listeners.forEach(listener ->
86 addAction("Listener " + listener.getClass().getSimpleName(),
87 () -> msgDispatcher.register(listener.getType(), listener.getScoListener()),
88 () -> msgDispatcher.unregister(listener.getType())));
90 addAction("Topic Message Dispatcher", this::registerMsgDispatcher, this::unregisterMsgDispatcher);
95 * Handle ContextRefreshEvent.
97 * @param ctxRefreshedEvent ContextRefreshedEvent
100 public void handleContextRefreshEvent(ContextRefreshedEvent ctxRefreshedEvent) {
103 sendParticipantRegister();
108 * Handle ContextClosedEvent.
110 * @param ctxClosedEvent ContextClosedEvent
113 public void handleContextClosedEvent(ContextClosedEvent ctxClosedEvent) {
115 sendParticipantDeregister();
120 private void sendParticipantRegister() {
121 participantIntermediaryApi.sendParticipantRegister();
124 private void sendParticipantDeregister() {
125 participantIntermediaryApi.sendParticipantDeregister();
129 * Registers the dispatcher with the topic source(s).
131 private void registerMsgDispatcher() {
132 for (final TopicSource source : topicSources) {
133 source.register(msgDispatcher);
138 * Unregisters the dispatcher from the topic source(s).
140 private void unregisterMsgDispatcher() {
141 for (final TopicSource source : topicSources) {
142 source.unregister(msgDispatcher);
147 public void close() throws IOException {