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/*
* Copyright (c) 2019 Eike Stepper (Loehne, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v20.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.oomph.util;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* @author Eike Stepper
*/
public class ThreadPool extends ThreadPoolExecutor
{
private static final int THREAD_COUNT = Runtime.getRuntime().availableProcessors() * 4;
private static final ThreadFactory THREAD_FACTORY = new ThreadFactory()
{
@Override
public Thread newThread(Runnable r)
{
Thread thread = new Thread(r);
thread.setDaemon(true);
return thread;
}
};
private final Object lock = new Object();
private int executingTasks;
public ThreadPool()
{
super(THREAD_COUNT, THREAD_COUNT, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(), THREAD_FACTORY);
}
@Override
public void execute(Runnable command)
{
synchronized (lock)
{
++executingTasks;
}
super.execute(command);
}
@Override
protected void afterExecute(Runnable command, Throwable t)
{
synchronized (lock)
{
if (--executingTasks == 0)
{
lock.notifyAll();
}
}
}
public void awaitFinished() throws InterruptedException
{
synchronized (lock)
{
while (executingTasks != 0)
{
lock.wait();
}
}
}
}
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