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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* 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.service.engine.engdep;
import java.net.InetSocketAddress;
import org.onap.policy.apex.core.infrastructure.messaging.MessagingService;
import org.onap.policy.apex.core.infrastructure.messaging.MessagingServiceFactory;
import org.onap.policy.apex.core.infrastructure.messaging.util.MessagingUtils;
import org.onap.policy.apex.core.protocols.Message;
import org.onap.policy.apex.service.engine.runtime.EngineService;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* The Class EngDepMessagingService is used to encapsulate the server side of EngDep communication. This class allows
* users to create and start an EngDep server.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class EngDepMessagingService {
private static final XLogger LOGGER = XLoggerFactory.getXLogger(EngDepMessagingService.class);
private final MessagingService<Message> messageService;
// The listener that is listening for messages coming in on the EngDep protocol from clients
private final EngDepMessageListener messageListener;
/**
* Instantiates a new EngDep messaging service. It creates the message service instance, a listener for incoming
* messages, and starts the message listener thread for handling incoming messages.
*
* @param service the Apex engine service that this EngDep service is running for
* @param port the port The port to use for EngDep communication
*/
public EngDepMessagingService(final EngineService service, final int port) {
LOGGER.entry(service);
// Create the service and listener and add the listener.
messageService = getMessageService(port);
messageListener = new EngDepMessageListener(service);
messageService.addMessageListener(messageListener);
// Start incoming message processing on the listener
messageListener.startProcessorThread();
LOGGER.exit();
}
/**
* Start the server, open the communication mechanism for connections.
*/
public void start() {
LOGGER.info("engine<-->deployment messaging starting . . .");
messageService.startConnection();
LOGGER.info("engine<-->deployment messaging started");
}
/**
* Start the server, close the communication mechanism.
*/
public void stop() {
LOGGER.info("engine<-->deployment messaging stopping . . .");
messageService.stopConnection();
messageListener.stopProcessorThreads();
LOGGER.info("engine<-->deployment messaging stopped");
}
/**
* Is the server started?.
*
* @return true, if checks if is started
*/
public boolean isStarted() {
return messageService.isStarted();
}
/**
* Is the server stopped?.
*
* @return true, if checks if is stopped
*/
public boolean isStopped() {
return !messageService.isStarted();
}
/**
* Get a message service instance. This method is protected so that it can be intercepted in unit test.
* @param port the message service port
* @return the message service
*/
protected MessagingService<Message> getMessageService(final int port) {
// Messaging service is used to transmit and receive messages over a communication protocol
MessagingServiceFactory<Message> factory = new MessagingServiceFactory<>();
return factory.createServer(new InetSocketAddress(MessagingUtils.checkPort(port)));
}
}
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