/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.synapse.experimental.mediators.seda;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.MessageContext;
import java.util.ArrayList;
import java.util.Collection;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
/**
*
*/
public class SEDAQueueConsumerWorker implements Runnable {
private static final Log log = LogFactory.getLog(SEDAQueueConsumerWorker.class);
private final SEDAQueueConsumerPolicy queueConsumerPolicy;
private final SEDAQueue sedaQueue;
private final BlockingQueue<MessageContext> queue;
private final SEDAQueueConsumer sedaQueueConsumer;
public SEDAQueueConsumerWorker(SEDAQueue sedaQueue,
SEDAQueueConsumerPolicy queueConsumerPolicy,
SEDAQueueConsumer sedaQueueConsumer) {
this.sedaQueue = sedaQueue;
this.queueConsumerPolicy = queueConsumerPolicy;
this.queue = sedaQueue.getQueue();
this.sedaQueueConsumer = sedaQueueConsumer;
}
public void run() {
String action = queueConsumerPolicy.getAction();
if (SEDAQueueConsumerPolicy.TAKE.equals(action)) {
try {
consume(queue.take());
} catch (InterruptedException ignored) {
log.debug("Ignored InterruptedException when ocuured calling queue.take()");
}
} else if (SEDAQueueConsumerPolicy.POLL.equals(action)) {
long timeout = queueConsumerPolicy.getTimeoutOnPoll();
if (timeout < 0) {
consume(queue.poll());
} else {
try {
consume(queue.poll(timeout, TimeUnit.MILLISECONDS));
} catch (InterruptedException ignored) {
log.debug("Ignored InterruptedException when ocuured calling queue.poll()");
}
}
} else if (SEDAQueueConsumerPolicy.DRAIN.equals(action)) {
int maxElements = queueConsumerPolicy.getMaxElementsOnPoll();
Collection<MessageContext> contexts = new ArrayList<MessageContext>(maxElements);
queue.drainTo(contexts, maxElements);
consume(contexts);
} else if (SEDAQueueConsumerPolicy.DRAINALL.equals(action)) {
Collection<MessageContext> contexts = new ArrayList<MessageContext>();
queue.drainTo(contexts);
consume(contexts);
}
}
private void consume(MessageContext context) {
if (context != null) {
sedaQueueConsumer.consume(context);
}
}
private void consume(Collection<MessageContext> contexts) {
for (MessageContext context : contexts) {
consume(context);
}
}
}