flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/SchedulingTopologyListener.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.scheduler;

import org.apache.flink.runtime.scheduler.strategy.ExecutionVertexID;
import org.apache.flink.runtime.scheduler.strategy.SchedulingTopology;

import java.util.List;

/** This listener will be notified whenever the scheduling topology is updated. */
public interface SchedulingTopologyListener {

    /**
     * Notifies that the scheduling topology is just updated.
     *
     * @param schedulingTopology the scheduling topology which is just updated
     * @param newExecutionVertices the newly added execution vertices.
     */
    void notifySchedulingTopologyUpdated(
            SchedulingTopology schedulingTopology, List<ExecutionVertexID> newExecutionVertices);
}