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/*-
* ============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.comm;
import java.io.Closeable;
import java.time.Instant;
import java.util.TimerTask;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoop;
import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopElement;
import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoops;
import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ParticipantStatistics;
import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantResponseDetails;
import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantResponseStatus;
import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantStatus;
import org.onap.policy.clamp.controlloop.participant.intermediary.api.ControlLoopElementListener;
import org.onap.policy.clamp.controlloop.participant.intermediary.comm.ParticipantStatusPublisher;
import org.onap.policy.clamp.controlloop.participant.intermediary.handler.ParticipantHandler;
import org.onap.policy.models.base.PfModelException;
import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class sends messages from participants to CLAMP.
*/
public class MessageSender extends TimerTask implements Closeable {
private static final Logger LOGGER = LoggerFactory.getLogger(MessageSender.class);
private final ParticipantHandler participantHandler;
private final ParticipantStatusPublisher publisher;
private ScheduledExecutorService timerPool;
/**
* Constructor, set the publisher.
*
* @param participantHandler the participant handler to use for gathering information
* @param publisher the publisher to use for sending messages
* @param interval time interval to send Participant Status periodic messages
*/
public MessageSender(ParticipantHandler participantHandler, ParticipantStatusPublisher publisher,
long interval) {
this.participantHandler = participantHandler;
this.publisher = publisher;
// Kick off the timer
timerPool = makeTimerPool();
timerPool.scheduleAtFixedRate(this, 0, interval, TimeUnit.SECONDS);
}
@Override
public void run() {
LOGGER.debug("Sent heartbeat to CLAMP");
ParticipantResponseDetails response = new ParticipantResponseDetails();
response.setResponseTo(null);
response.setResponseStatus(ParticipantResponseStatus.PERIODIC);
response.setResponseMessage("Periodic response from participant");
}
@Override
public void close() {
timerPool.shutdown();
}
/**
* Send a response message for this participant.
*
* @param response the details to include in the response message
*/
public void sendResponse(ParticipantResponseDetails response) {
sendResponse(null, response);
}
/**
* Dispatch a response message for this participant.
*
* @param controlLoopId the control loop to which this message is a response
* @param response the details to include in the response message
*/
public void sendResponse(ToscaConceptIdentifier controlLoopId, ParticipantResponseDetails response) {
ParticipantStatus status = new ParticipantStatus();
// Participant related fields
status.setParticipantType(participantHandler.getParticipantType());
status.setParticipantId(participantHandler.getParticipantId());
status.setState(participantHandler.getState());
status.setHealthStatus(participantHandler.getHealthStatus());
// Control loop related fields
ControlLoops controlLoops = participantHandler.getControlLoopHandler().getControlLoops();
status.setControlLoopId(controlLoopId);
status.setControlLoops(controlLoops);
status.setResponse(response);
ParticipantStatistics participantStatistics = new ParticipantStatistics();
participantStatistics.setTimeStamp(Instant.now());
participantStatistics.setParticipantId(participantHandler.getParticipantId());
participantStatistics.setHealthStatus(participantHandler.getHealthStatus());
participantStatistics.setState(participantHandler.getState());
status.setParticipantStatistics(participantStatistics);
for (ControlLoopElementListener clElementListener :
participantHandler.getControlLoopHandler().getListeners()) {
updateClElementStatistics(controlLoops, clElementListener);
}
status.setControlLoops(controlLoops);
publisher.send(status);
}
/**
* Update ControlLoopElement statistics. The control loop elements listening will be
* notified to retrieve statistics from respective controlloop elements, and controlloopelements
* data on the handler will be updated.
*
* @param controlLoops the control loops
* @param clElementListener control loop element listener
*/
public void updateClElementStatistics(ControlLoops controlLoops, ControlLoopElementListener clElementListener) {
for (ControlLoop controlLoop : controlLoops.getControlLoopList()) {
for (ControlLoopElement element : controlLoop.getElements().values()) {
try {
clElementListener.handleStatistics(element.getId());
} catch (PfModelException e) {
LOGGER.debug("Getting statistics for Control loop element failed");
}
}
}
}
/**
* Makes a new timer pool.
*
* @return a new timer pool
*/
protected ScheduledExecutorService makeTimerPool() {
return Executors.newScheduledThreadPool(1);
}
}
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