spark DownloadFileManager 源码
spark DownloadFileManager 代码
文件路径：/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/DownloadFileManager.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 org.apache.spark.network.util.TransportConf;
/**
* A manager to create temp block files used when fetching remote data to reduce the memory usage.
* It will clean files when they won't be used any more.
*/
public interface DownloadFileManager {
/** Create a temp block file. */
DownloadFile createTempFile(TransportConf transportConf);
/**
* Register a temp file to clean up when it won't be used any more. Return whether the
* file is registered successfully. If `false`, the caller should clean up the file by itself.
*/
boolean registerTempFileToClean(DownloadFile file);
}
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