/*
* JacORB - a free Java ORB
*
* Copyright (C) 1999-2014 Gerald Brose / The JacORB Team.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
package org.jacorb.notification.engine;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import org.jacorb.notification.interfaces.Disposable;
public class DefaultPushTaskExecutor implements PushTaskExecutor, Disposable
{
private int noOfExecutors_ = 0;
private final int executorNr_ = noOfExecutors_++;
final LinkedBlockingQueue<PushTask> scheduledPushTasks_ = new LinkedBlockingQueue<PushTask>();
final AtomicBoolean isActive_ = new AtomicBoolean(true);
final ArrayList<Worker> workers_ = new ArrayList<Worker>();
private class Worker extends Thread
{
public Worker(String name)
{
super(name);
}
public void run()
{
while (isActive_.get())
{
try
{
PushTaskExecutor.PushTask pushTask =
scheduledPushTasks_.take();
if (isActive_.get())
{
pushTask.doPush();
}
} catch (InterruptedException e)
{
// ignore
}
}
}
}
public DefaultPushTaskExecutor(int numberOfWorkers)
{
if (numberOfWorkers < 1)
{
throw new IllegalArgumentException("At least 1 Worker");
}
createWorkers(numberOfWorkers);
startWorkers();
}
public void executePush(PushTaskExecutor.PushTask pushTask)
{
if (isActive_.get())
{
try
{
scheduledPushTasks_.put(pushTask);
} catch (InterruptedException e)
{
// TODO
}
}
}
public void dispose()
{
isActive_.set(false);
try
{
while (!scheduledPushTasks_.isEmpty())
{
PushTaskExecutor.PushTask pushTask = scheduledPushTasks_.take();
pushTask.cancel();
}
} catch (InterruptedException e)
{
// ignore
}
disposeWorkers();
}
private void createWorkers(int numberOfWorkers)
{
for (int x = 0; x < numberOfWorkers; ++x)
{
Worker worker = new Worker("PushTaskExecutor#" + executorNr_ + "-" + x);
workers_.add(worker);
}
}
private void startWorkers()
{
Iterator<Worker> i = workers_.iterator();
while (i.hasNext())
{
((Thread) i.next()).start();
}
}
private void disposeWorkers()
{
Iterator<Worker> i = workers_.iterator();
while (i.hasNext())
{
Thread thread = i.next();
thread.interrupt();
}
workers_.clear();
}
}