/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.flink.streaming.runtime.io;
import java.util.concurrent.BlockingQueue;
import org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.iterative.concurrent.Broker;
/**
* {@link Broker} for the {@link BlockingQueue} used in
* {@link org.apache.flink.streaming.runtime.tasks.StreamIterationHead} and
* {@link org.apache.flink.streaming.runtime.tasks.StreamIterationTail} for implementing feedback
* streams.
*/
@Internal
public class BlockingQueueBroker extends Broker<BlockingQueue<?>> {
/** Singleton instance. */
public static final BlockingQueueBroker INSTANCE = new BlockingQueueBroker();
/** Cannot instantiate. */
private BlockingQueueBroker() {}
}