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/*-
* ============LICENSE_START=======================================================
* APPC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* Copyright (C) 2017 Amdocs
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.openecomp.appc.executionqueue.impl;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import org.openecomp.appc.executionqueue.MessageExpirationListener;
import org.openecomp.appc.executionqueue.helper.Util;
import org.openecomp.appc.executionqueue.impl.object.QueueMessage;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
public class QueueManager {
private LinkedBlockingQueue<QueueMessage<? extends Runnable>> queue;
private MessageExpirationListener listener;
private static int MAX_QUEUE_SIZE = Util.getExecutionQueSize();
private static int MAX_THREAD_SIZE = Util.getThreadPoolSize();
private ExecutorService messageExecutor;
private static final EELFLogger logger =
EELFManager.getInstance().getLogger(QueueManager.class);
private QueueManager(){
init();
}
private static class QueueManagerHolder {
private static final QueueManager INSTANCE = new QueueManager();
}
public static QueueManager getInstance() {
return QueueManagerHolder.INSTANCE;
}
private void init(){
queue = new LinkedBlockingQueue<QueueMessage<? extends Runnable>>(MAX_QUEUE_SIZE);
messageExecutor = Executors.newFixedThreadPool(MAX_THREAD_SIZE,Util.getThreadFactory(true));
for(int i=0;i<MAX_THREAD_SIZE;i++){
messageExecutor.submit(new Runnable() {
@Override
public void run() {
while (true){
try{
QueueMessage<? extends Runnable> queueMessage = queue.take();
if (queueMessage.isExpired()) {
logger.debug("Message expired "+ queueMessage.getMessage());
if(listener != null){
listener.onMessageExpiration(queueMessage.getMessage());
}
else{
logger.warn("Listener not available for expired message ");
}
}
else{
queueMessage.getMessage().run();
}
} catch (Exception e) {
logger.error("Error in startMessagePolling method of ExecutionQueueServiceImpl" + e.getMessage());
}
}
}
});
}
}
public void setListener(MessageExpirationListener listener) {
this.listener = listener;
}
public boolean enqueueTask(QueueMessage<? extends Runnable> queueMessage) {
return queue.offer(queueMessage);
}
}
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