/* This file is part of the db4o object database http://www.db4o.com

Copyright (C) 2004 - 2010  Versant Corporation http://www.versant.com

db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.

db4o 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 this program.  If not, see http://www.gnu.org/licenses/. */
package com.db4o.foundation;

public class TimeoutBlockingQueue<T> extends PausableBlockingQueue<T> implements TimeoutBlockingQueue4<T> {

	private long expirationDate;
	private final long maxTimeToRemainPaused;

	public TimeoutBlockingQueue(long maxTimeToRemainPaused) {
		this.maxTimeToRemainPaused = maxTimeToRemainPaused;
	}

	@Override
	public boolean pause() {
		reset();
		return super.pause();
	}
	
	public void check() {
		long now = System.currentTimeMillis();
		if (now > expirationDate) {
			resume();
		}
	}

	public void reset() {
		expirationDate = System.currentTimeMillis() + maxTimeToRemainPaused;
	}

}
