ShuffleMode

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
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 * 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
 *
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package org.apache.flink.streaming.api.transformations;
import org.apache.flink.annotation.PublicEvolving;
/**
 * The shuffle mode defines the data exchange mode between operators.
 */
@PublicEvolving
public enum ShuffleMode {
    /**
     * Producer and consumer are online at the same time.
     * Produced data is received by consumer immediately.
     */
    PIPELINED,
    /**
     * The producer first produces its entire result and finishes.
     * After that, the consumer is started and may consume the data.
     */
    BATCH,
    /**
     * The shuffle mode is undefined. It leaves it up to the framework to decide the shuffle mode.
     * The framework will pick one of {@link ShuffleMode#BATCH} or {@link ShuffleMode#PIPELINED} in
     * the end.
     */
    UNDEFINED
}

StreamGraphGenerator