flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/DistributionPattern.java

/*
 * 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
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 */

package org.apache.flink.runtime.jobgraph;

import org.apache.flink.runtime.executiongraph.EdgeManagerBuildUtil;
import org.apache.flink.runtime.executiongraph.ExecutionVertex;
import org.apache.flink.runtime.executiongraph.IntermediateResultPartition;

/**
 * A distribution pattern determines, which sub tasks of a producing task are connected to which
 * consuming sub tasks.
 *
 * <p>It affects how {@link ExecutionVertex} and {@link IntermediateResultPartition} are connected
 * in {@link EdgeManagerBuildUtil}
 */
public enum DistributionPattern {

    /** Each producing sub task is connected to each sub task of the consuming task. */
    ALL_TO_ALL,

    /** Each producing sub task is connected to one or more subtask(s) of the consuming task. */
    POINTWISE
}