com.mchange.v1.util.SimpleRunnableQueue Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software 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.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.v1.util;
import java.util.List;
import java.util.LinkedList;
/**
* @deprecated use com.mchange.v2.async.SimpleRunnableQueue
*/
public class SimpleRunnableQueue implements RunnableQueue
{
private List taskList = new LinkedList();
private Thread t = new TaskThread();
public SimpleRunnableQueue(boolean daemon)
{
t.setDaemon(daemon);
t.start();
}
public SimpleRunnableQueue()
{ this( true ); }
public synchronized void postRunnable(Runnable r)
{
taskList.add(r);
this.notifyAll();
}
public synchronized void close()
{
t.interrupt();
taskList = null;
t = null;
}
private synchronized Runnable dequeueRunnable()
{
Runnable r = (Runnable) taskList.get(0);
taskList.remove(0);
return r;
}
private synchronized void awaitTask() throws InterruptedException
{while (taskList.size() == 0) this.wait();}
class TaskThread extends Thread
{
TaskThread()
{ super("SimpleRunnableQueue.TaskThread"); }
public void run()
{
try
{
while (true)
{
awaitTask();
Runnable r = dequeueRunnable();
try
{ r.run(); }
catch (Exception e)
{
System.err.println(this.getClass().getName() +
" -- Unexpected exception in task!");
e.printStackTrace();
}
}
}
catch (InterruptedException e)
{
if (Debug.DEBUG)
System.err.println( this.toString() + " interrupted. Shutting down." );
}
}
}
}