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/*
*
* 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.qpid.pool;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.mina.common.IoSession;
/**
* Holds events for a session that will be processed asynchronously by
* the thread pool in PoolingFilter.
*/
public class Job implements Runnable
{
private final int _maxEvents;
private final IoSession _session;
private final java.util.Queue<Event> _eventQueue = new ConcurrentLinkedQueue<Event>();
private final AtomicBoolean _active = new AtomicBoolean();
//private final AtomicInteger _refCount = new AtomicInteger();
private final JobCompletionHandler _completionHandler;
Job(IoSession session, JobCompletionHandler completionHandler, int maxEvents)
{
_session = session;
_completionHandler = completionHandler;
_maxEvents = maxEvents;
}
//
// void acquire()
// {
// _refCount.incrementAndGet();
// }
//
// void release()
// {
// _refCount.decrementAndGet();
// }
//
// boolean isReferenced()
// {
// return _refCount.get() > 0;
// }
void add(Event evt)
{
_eventQueue.add(evt);
}
void processAll()
{
//limit the number of events processed in one run
for (int i = 0; i < _maxEvents; i++)
{
Event e = _eventQueue.poll();
if (e == null)
{
break;
}
else
{
e.process(_session);
}
}
}
boolean isComplete()
{
return _eventQueue.peek() == null;
}
boolean activate()
{
return _active.compareAndSet(false, true);
}
void deactivate()
{
_active.set(false);
}
public void run()
{
processAll();
deactivate();
_completionHandler.completed(_session, this);
}
static interface JobCompletionHandler
{
public void completed(IoSession session, Job job);
}
}
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