PECountdownPromise.java

package com.tesora.dve.concurrent;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import java.util.concurrent.atomic.AtomicInteger;

public class PECountdownPromise<T> extends PEDefaultPromise<T> {
	
	final AtomicInteger countdown;
	
	public PECountdownPromise(int count) {
		countdown = new AtomicInteger(count);
	}

	@Override
	public void success(T returnValue) {
		if (countdown.decrementAndGet() == 0)
			super.success(returnValue);
	}

	
}