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/*
 * 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 org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.iterative.concurrent.Broker;

import java.util.concurrent.BlockingQueue;

/**
 * {@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> {

    /** Singleton instance. */
    public static final BlockingQueueBroker INSTANCE = new BlockingQueueBroker();

    /** Cannot instantiate. */
    private BlockingQueueBroker() {}
}