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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 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.apex.starter.handler;
import java.util.List;
import org.onap.policy.apex.starter.parameters.PdpStatusParameters;
import org.onap.policy.common.capabilities.Startable;
import org.onap.policy.common.endpoints.event.comm.TopicSink;
import org.onap.policy.common.endpoints.event.comm.TopicSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class manages the communication between apex pdp and pap.
*
* @author Ajith Sreekumar (ajith.sreekumar@est.tech)
*/
public class CommunicationHandler implements Startable {
private static final Logger LOGGER = LoggerFactory.getLogger(CommunicationHandler.class);
private List<TopicSink> topicSinks; // topics to which apex-pdp sends pdp status
private List<TopicSource> topicSources; // topics to which apex-pdp listens to for messages from pap.
private PdpStatusPublisher pdpStatusPublisher;
private PdpStatusParameters pdpStatusParameters;
/**
* Constructor for instantiating CommunicationHandler
*
* @param topicSinks topics to which apex-pdp sends pdp status
* @param topicSources topics to which apex-pdp listens to for messages from pap.
* @param pdpStatusParameters pdp status parameters read from the configuration file
*/
public CommunicationHandler(final List<TopicSink> topicSinks, final List<TopicSource> topicSources,
final PdpStatusParameters pdpStatusParameters) {
this.topicSinks = topicSinks;
this.topicSources = topicSources;
this.pdpStatusParameters = pdpStatusParameters;
}
@Override
public boolean start() {
try {
pdpStatusPublisher = new PdpStatusPublisher(topicSinks, pdpStatusParameters.getTimeInterval());
} catch (final Exception e) {
LOGGER.error("Failed to start communication handler for apex-pdp", e);
return false;
}
return true;
}
@Override
public boolean stop() {
try {
pdpStatusPublisher.terminate();
} catch (final Exception e) {
LOGGER.error("Failed to stop communication handler for apex-pdp", e);
return false;
}
return true;
}
@Override
public void shutdown() {
stop();
}
@Override
public boolean isAlive() {
return pdpStatusPublisher.isAlive();
}
}
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