BackgroundRunner.java

/** 
    Copyright 2015 Tim Engler, Rareventure LLC

    This file is part of Tiny Travel Tracker.

    Tiny Travel Tracker is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Tiny Travel Tracker 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Tiny Travel Tracker.  If not, see <http://www.gnu.org/licenses/>.

*/
package com.rareventure.util;

import java.util.LinkedList;

public class BackgroundRunner extends Thread {
	private LinkedList<Runnable> runnableList = new LinkedList<Runnable>();

	public void run()
	{
		Runnable runnable;
		
		for(;;)
		{
			synchronized(this)
			{
				if(runnableList.isEmpty())
				{
					try {
						wait();
					} catch (InterruptedException e) {
						throw new IllegalStateException(e);
					}
					continue;
				}
				runnable = runnableList.removeFirst();
			}
			
			runnable.run();
		}
	}
	
	public synchronized void addRunnable(Runnable r)
	{
		runnableList.add(r);
		notify();
	}
}