spark ShuffleDriverComponents 源码
spark ShuffleDriverComponents 代码
文件路径：/core/src/main/java/org/apache/spark/shuffle/api/ShuffleDriverComponents.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.shuffle.api;
import java.util.Map;
import org.apache.spark.annotation.Private;
/**
* :: Private ::
* An interface for building shuffle support modules for the Driver.
*/
@Private
public interface ShuffleDriverComponents {
/**
* Called once in the driver to bootstrap this module that is specific to this application.
* This method is called before submitting executor requests to the cluster manager.
*
* This method should prepare the module with its shuffle components i.e. registering against
* an external file servers or shuffle services, or creating tables in a shuffle
* storage data database.
*
* @return additional SparkConf settings necessary for initializing the executor components.
* This would include configurations that cannot be statically set on the application, like
* the host:port of external services for shuffle storage.
*/
Map<String, String> initializeApplication();
/**
* Called once at the end of the Spark application to clean up any existing shuffle state.
*/
void cleanupApplication();
/**
* Called once per shuffle id when the shuffle id is first generated for a shuffle stage.
*
* @param shuffleId The unique identifier for the shuffle stage.
*/
default void registerShuffle(int shuffleId) {}
/**
* Removes shuffle data associated with the given shuffle.
*
* @param shuffleId The unique identifier for the shuffle stage.
* @param blocking Whether this call should block on the deletion of the data.
*/
default void removeShuffle(int shuffleId, boolean blocking) {}
}
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