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/*******************************************************************************
* Copyright (c) 1997-2007 by ProSyst Software GmbH
* http://www.prosyst.com
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* ProSyst Software GmbH - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.util.impl.tpt.threadpool;
import java.security.AccessControlContext;
import java.security.AccessController;
import org.eclipse.equinox.internal.util.UtilActivator;
import org.eclipse.equinox.internal.util.impl.tpt.ServiceFactoryImpl;
import org.eclipse.equinox.internal.util.ref.Log;
import org.eclipse.equinox.internal.util.threadpool.ThreadPoolFactory;
import org.eclipse.equinox.internal.util.threadpool.ThreadPoolManager;
/**
* @author Pavlin Dobrev
* @version 1.0
*/
public class ThreadPoolFactoryImpl extends ServiceFactoryImpl implements ThreadPoolManager, ThreadPoolFactory {
public static ThreadPoolManagerImpl threadPool;
private int limit;
private int used = 0;
private Job queue;
private static int defaultPercent;;
public ThreadPoolFactoryImpl(String bundleName, Log log) {
super(bundleName, log);
threadPool = ThreadPoolManagerImpl.getThreadPool();
defaultPercent = UtilActivator.getInteger("equinox.util.threadpool.percent", 30);
limit = (ThreadPoolManagerImpl.tMaximum * defaultPercent) / 100;
if (limit == 0)
limit = 1;
queue = new Job();
}
public ThreadPoolFactoryImpl(String bundleName, int size) {
super(bundleName);
limit = size;
if (limit == 0)
limit = 1;
queue = new Job();
}
public ThreadPoolFactoryImpl(String bundleName) {
this(bundleName, (ThreadPoolManagerImpl.tMaximum * defaultPercent) / 100);
}
public Object getInstance(String bundleName) {
if (threadPool == null)
throw new RuntimeException("ServiceFactory is currently off!");
return new ThreadPoolFactoryImpl(bundleName);
}
public static void stopThreadPool() {
ThreadPoolManagerImpl tmp = threadPool;
threadPool = null;
tmp.clear();
}
public ThreadPoolManager getThreadPool(int size, boolean sizeIsInPercents) {
if (threadPool == null)
throw new RuntimeException("[ThreadPool] ThreadPool is inaccessible");
if (sizeIsInPercents) {
size = (ThreadPoolManagerImpl.tMaximum * size) / 100;
}
if (size <= 0) {
size = 1;
}
return new ThreadPoolFactoryImpl(bundleName, size);
}
public void execute(Runnable job, String name) {
execute(job, Thread.NORM_PRIORITY, name);
}
public void execute0(Runnable job, int priority, String name, AccessControlContext acc) {
if (job == null || name == null) {
throw new IllegalArgumentException("the job or the name parameter is/are null");
}
if (ServiceFactoryImpl.useNames)
name = name + bundleName;
ThreadPoolManagerImpl tmp = threadPool;
if (tmp != null) {
synchronized (tmp.getSyncMonitor()) {
if (used >= limit) {
if (UtilActivator.LOG_DEBUG) {
UtilActivator.log.debug("In Bundle Queue: " + name + ", bundle queue size: " + queue.counter, null);
}
queue.addJob(job, name, priority, this, acc);
return;
}
used++;
}
tmp.execute(job, priority, name, this, acc
);
} else
throw new RuntimeException("[ThreadPool] ThreadPool is inaccessible");
}
public void execute(Runnable job, int priority, String name, AccessControlContext acc) {
execute0(job, priority, name, acc
);
}
public void execute(Runnable job, int priority, String name) {
execute0(job, priority, name, (Log.security() ? AccessController.getContext() : null));
}
public Executor getExecutor() {
ThreadPoolManagerImpl tmp = threadPool;
if (tmp != null) {
synchronized (tmp.getSyncMonitor()) {
if (used < limit) {
Executor ex = tmp.getExecutor();
if (ex != null)
used++;
return ex;
}
}
}
return null;
}
void finished() {
Job job = queue.getJob();
if (job != null) {
if (UtilActivator.LOG_DEBUG) {
UtilActivator.log.debug("To threadpool queue: " + job.name + ", queue size: " + threadPool.waiting.counter, null);
}
threadPool.waiting.addJob(job);
} else {
used--;
}
}
public void reset() {
if (threadPool != null) {
threadPool.reset();
}
}
}
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