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/*-
* ============LICENSE_START=======================================================
* ONAP : 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.
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
* ============LICENSE_END=========================================================
*/
package org.onap.appc.executionqueue.impl;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.onap.appc.executionqueue.MessageExpirationListener;
import org.onap.appc.executionqueue.helper.Util;
import org.onap.appc.executionqueue.impl.object.QueueMessage;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class QueueManager {
private final EELFLogger logger = EELFManager.getInstance().getLogger(QueueManager.class);
private MessageExpirationListener listener;
private ExecutorService messageExecutor;
private int max_thread_size;
private int max_queue_size;
private Util executionQueueUtil;
public QueueManager() {
//do nothing
}
/**
* Initialization method used by blueprint
*/
public void init() {
max_thread_size = executionQueueUtil.getThreadPoolSize();
max_queue_size = executionQueueUtil.getExecutionQueueSize();
messageExecutor = new ThreadPoolExecutor(
max_thread_size,
max_thread_size,
0L,
TimeUnit.MILLISECONDS,
new LinkedBlockingQueue(max_queue_size),
executionQueueUtil.getThreadFactory(true, "appc-dispatcher"),
new ThreadPoolExecutor.AbortPolicy());
}
/**
* Destory method used by blueprint
*/
public void stop() {
// Disable new tasks from being submitted
messageExecutor.shutdown();
List<Runnable> rejectedRunnables = messageExecutor.shutdownNow();
logger.info(String.format("Rejected %d waiting tasks include ", rejectedRunnables.size()));
try {
messageExecutor.shutdownNow(); // Cancel currently executing tasks
// Wait a while for tasks to respond to being cancelled
while (!messageExecutor.awaitTermination(100, TimeUnit.MILLISECONDS)) {
logger.debug("QueueManager is being shut down because it still has threads not interrupted");
}
} catch (InterruptedException ie) {
// (Re-)Cancel if current thread also interrupted
messageExecutor.shutdownNow();
// Preserve interrupt status
Thread.currentThread().interrupt();
}
}
public void setListener(MessageExpirationListener listener) {
this.listener = listener;
}
/**
* Injected by blueprint
*
* @param executionQueueUtil Util to be set
*/
public void setExecutionQueueUtil(Util executionQueueUtil) {
this.executionQueueUtil = executionQueueUtil;
}
public boolean enqueueTask(QueueMessage queueMessage) {
boolean isEnqueued = true;
try {
messageExecutor.execute(() -> {
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 (RejectedExecutionException ree) {
isEnqueued = false;
}
return isEnqueued;
}
}
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