spark MergedBlocksMetaListener 源码
spark MergedBlocksMetaListener 代码
文件路径：/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/MergedBlocksMetaListener.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
* limitations under the License.
*/
package org.apache.spark.network.shuffle;
import java.util.EventListener;
/**
* Listener for receiving success or failure events when fetching meta of merged blocks.
*
* @since 3.2.0
*/
public interface MergedBlocksMetaListener extends EventListener {
/**
* Called after successfully receiving the meta of a merged block.
*
* @param shuffleId shuffle id.
* @param shuffleMergeId shuffleMergeId is used to uniquely identify merging process
* of shuffle by an indeterminate stage attempt.
* @param reduceId reduce id.
* @param meta contains meta information of a merged block.
*/
void onSuccess(int shuffleId, int shuffleMergeId, int reduceId, MergedBlockMeta meta);
/**
* Called when there is an exception while fetching the meta of a merged block.
*
* @param shuffleId shuffle id.
* @param shuffleMergeId shuffleMergeId is used to uniquely identify merging process
* of shuffle by an indeterminate stage attempt.
* @param reduceId reduce id.
* @param exception exception getting chunk counts.
*/
void onFailure(int shuffleId, int shuffleMergeId, int reduceId, Throwable exception);
}
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