diff options
Diffstat (limited to 'tosca-controlloop/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/handler/IntermediaryActivator.java')
-rw-r--r-- | tosca-controlloop/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/handler/IntermediaryActivator.java | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/tosca-controlloop/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/handler/IntermediaryActivator.java b/tosca-controlloop/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/handler/IntermediaryActivator.java new file mode 100644 index 000000000..dd0cf30a8 --- /dev/null +++ b/tosca-controlloop/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/handler/IntermediaryActivator.java @@ -0,0 +1,129 @@ +/*- + * ============LICENSE_START======================================================= + * Copyright (C) 2021 Nordix Foundation. + * ================================================================================ + * 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.clamp.controlloop.participant.intermediary.handler; + +import java.util.List; +import java.util.concurrent.atomic.AtomicReference; +import javax.ws.rs.core.Response.Status; +import lombok.Getter; +import lombok.experimental.Delegate; +import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException; +import org.onap.policy.clamp.controlloop.participant.intermediary.comm.ControlLoopUpdateListener; +import org.onap.policy.clamp.controlloop.participant.intermediary.comm.ParticipantStatusPublisher; +import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters; +import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager; +import org.onap.policy.common.endpoints.event.comm.TopicSink; +import org.onap.policy.common.endpoints.event.comm.TopicSource; +import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher; +import org.onap.policy.common.utils.services.ServiceManagerContainer; + +/** + * This class activates the Participant Intermediary together with all its handlers. + */ +public class IntermediaryActivator extends ServiceManagerContainer { + // Name of the message type for messages on topics + private static final String[] MSG_TYPE_NAMES = {"messageType"}; + + @Getter + private final ParticipantIntermediaryParameters parameters; + + // Topics from which the participant receives and to which the participant sends messages + private List<TopicSink> topicSinks; + private List<TopicSource> topicSources; + + // The participant handler for this intermediary + final AtomicReference<ParticipantHandler> participantHandler = new AtomicReference<>(); + + /** + * Listens for messages on the topic, decodes them into a message, and then dispatches them. + */ + private final MessageTypeDispatcher msgDispatcher; + + /** + * Instantiate the activator for participant. + * + * @param parameters the parameters for the participant intermediary + */ + public IntermediaryActivator(final ParticipantIntermediaryParameters parameters) { + this.parameters = parameters; + + topicSinks = + TopicEndpointManager.getManager().addTopicSinks(parameters.getClampControlLoopTopics().getTopicSinks()); + + topicSources = TopicEndpointManager.getManager() + .addTopicSources(parameters.getClampControlLoopTopics().getTopicSources()); + + try { + this.msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES); + } catch (final RuntimeException e) { + throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, + "topic message dispatcher failed to start", e); + } + + // @formatter:off + final AtomicReference<ParticipantStatusPublisher> statusPublisher = new AtomicReference<>(); + final AtomicReference<ControlLoopUpdateListener> controlLoopUpdateListener = new AtomicReference<>(); + + addAction("Topic endpoint management", + () -> TopicEndpointManager.getManager().start(), + () -> TopicEndpointManager.getManager().shutdown()); + + addAction("Participant Status Publisher", + () -> statusPublisher.set(new ParticipantStatusPublisher(topicSinks)), + () -> statusPublisher.get().close()); + + addAction("Participant Handler", + () -> participantHandler.set(new ParticipantHandler(parameters, statusPublisher.get())), + () -> participantHandler.get().close()); + + addAction("Control Loop Update Listener", + () -> controlLoopUpdateListener.set(new ControlLoopUpdateListener(participantHandler.get())), + () -> controlLoopUpdateListener.get().close()); + + addAction("Topic Message Dispatcher", this::registerMsgDispatcher, this::unregisterMsgDispatcher); + // @formatter:on + } + + /** + * Registers the dispatcher with the topic source(s). + */ + private void registerMsgDispatcher() { + for (final TopicSource source : topicSources) { + source.register(msgDispatcher); + } + } + + /** + * Unregisters the dispatcher from the topic source(s). + */ + private void unregisterMsgDispatcher() { + for (final TopicSource source : topicSources) { + source.unregister(msgDispatcher); + } + } + + /** + * Return the participant handler. + */ + public ParticipantHandler getParticipantHandler() { + return participantHandler.get(); + } +} |