shuffle/api/SingleSpillShuffleMapOutputWriter.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.shuffle.api;
0019
0020 import java.io.File;
0021 import java.io.IOException;
0022
0023 import org.apache.spark.annotation.Private;
0024
0025 /**
0026  * Optional extension for partition writing that is optimized for transferring a single
0027  * file to the backing store.
0028  */
0029 @Private
0030 public interface SingleSpillShuffleMapOutputWriter {
0031
0032   /**
0033    * Transfer a file that contains the bytes of all the partitions written by this map task.
0034    */
0035   void transferMapSpillFile(File mapOutputFile, long[] partitionLengths) throws IOException;
0036 }