/*
* 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.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import com.google.common.io.Files;
import org.apache.spark.network.shuffle.protocol.ExecutorShuffleInfo;
/**
* Manages some sort- and hash-based shuffle data, including the creation
* and cleanup of directories that can be read by the {@link ExternalShuffleBlockManager}.
*/
public class TestShuffleDataContext {
public final String[] localDirs;
public final int subDirsPerLocalDir;
public TestShuffleDataContext(int numLocalDirs, int subDirsPerLocalDir) {
this.localDirs = new String[numLocalDirs];
this.subDirsPerLocalDir = subDirsPerLocalDir;
}
public void create() {
for (int i = 0; i < localDirs.length; i ++) {
localDirs[i] = Files.createTempDir().getAbsolutePath();
for (int p = 0; p < subDirsPerLocalDir; p ++) {
new File(localDirs[i], String.format("%02x", p)).mkdirs();
}
}
}
public void cleanup() {
for (String localDir : localDirs) {
deleteRecursively(new File(localDir));
}
}
/** Creates reducer blocks in a sort-based data format within our local dirs. */
public void insertSortShuffleData(int shuffleId, int mapId, byte[][] blocks) throws IOException {
String blockId = "shuffle_" + shuffleId + "_" + mapId + "_0";
OutputStream dataStream = new FileOutputStream(
ExternalShuffleBlockManager.getFile(localDirs, subDirsPerLocalDir, blockId + ".data"));
DataOutputStream indexStream = new DataOutputStream(new FileOutputStream(
ExternalShuffleBlockManager.getFile(localDirs, subDirsPerLocalDir, blockId + ".index")));
long offset = 0;
indexStream.writeLong(offset);
for (byte[] block : blocks) {
offset += block.length;
dataStream.write(block);
indexStream.writeLong(offset);
}
dataStream.close();
indexStream.close();
}
/** Creates reducer blocks in a hash-based data format within our local dirs. */
public void insertHashShuffleData(int shuffleId, int mapId, byte[][] blocks) throws IOException {
for (int i = 0; i < blocks.length; i ++) {
String blockId = "shuffle_" + shuffleId + "_" + mapId + "_" + i;
Files.write(blocks[i],
ExternalShuffleBlockManager.getFile(localDirs, subDirsPerLocalDir, blockId));
}
}
/**
* Creates an ExecutorShuffleInfo object based on the given shuffle manager which targets this
* context's directories.
*/
public ExecutorShuffleInfo createExecutorInfo(String shuffleManager) {
return new ExecutorShuffleInfo(localDirs, subDirsPerLocalDir, shuffleManager);
}
private static void deleteRecursively(File f) {
assert f != null;
if (f.isDirectory()) {
File[] children = f.listFiles();
if (children != null) {
for (File child : children) {
deleteRecursively(child);
}
}
}
f.delete();
}
}