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/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 **********************************************************************************************************************/

package eu.stratosphere.pact.runtime.iterative.concurrent;

/**
 * Singleton class for the threadsafe handover of {@link BlockingBackChannel}s from iteration heads to iteration tails
 */
public class BlockingBackChannelBroker extends Broker {

	/**
	 * Singleton instance
	 */
	private static final BlockingBackChannelBroker INSTANCE = new BlockingBackChannelBroker();

	private BlockingBackChannelBroker() {}

	/**
	 * retrieve singleton instance
	 */
	public static Broker instance() {
		return INSTANCE;
	}
}