/**
* 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.tez.runtime.library.shuffle.common;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import javax.crypto.SecretKey;
import org.apache.commons.logging.Log;
import org.apache.hadoop.io.DataInputByteBuffer;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.compress.CodecPool;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.Decompressor;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.tez.runtime.library.common.security.JobTokenIdentifier;
import org.apache.tez.runtime.library.common.security.JobTokenSecretManager;
import org.apache.tez.runtime.library.common.sort.impl.IFileInputStream;
public class ShuffleUtils {
public static String SHUFFLE_HANDLER_SERVICE_ID = "mapreduce_shuffle";
public static SecretKey getJobTokenSecretFromTokenBytes(ByteBuffer meta)
throws IOException {
DataInputByteBuffer in = new DataInputByteBuffer();
in.reset(meta);
Token<JobTokenIdentifier> jt = new Token<JobTokenIdentifier>();
jt.readFields(in);
SecretKey sk = JobTokenSecretManager.createSecretKey(jt.getPassword());
return sk;
}
public static ByteBuffer convertJobTokenToBytes(
Token<JobTokenIdentifier> jobToken) throws IOException {
DataOutputBuffer dob = new DataOutputBuffer();
jobToken.write(dob);
ByteBuffer bb = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
return bb;
}
public static int deserializeShuffleProviderMetaData(ByteBuffer meta)
throws IOException {
DataInputByteBuffer in = new DataInputByteBuffer();
try {
in.reset(meta);
int port = in.readInt();
return port;
} finally {
in.close();
}
}
@SuppressWarnings("resource")
public static void shuffleToMemory(MemoryFetchedInput fetchedInput,
InputStream input, int decompressedLength, int compressedLength,
CompressionCodec codec, boolean ifileReadAhead, int ifileReadAheadLength,
Log LOG) throws IOException {
IFileInputStream checksumIn = new IFileInputStream(input, compressedLength,
ifileReadAhead, ifileReadAheadLength);
input = checksumIn;
// Are map-outputs compressed?
if (codec != null) {
Decompressor decompressor = CodecPool.getDecompressor(codec);
decompressor.reset();
input = codec.createInputStream(input, decompressor);
}
// Copy map-output into an in-memory buffer
byte[] shuffleData = fetchedInput.getBytes();
try {
IOUtils.readFully(input, shuffleData, 0, shuffleData.length);
// metrics.inputBytes(shuffleData.length);
LOG.info("Read " + shuffleData.length + " bytes from input for "
+ fetchedInput.getInputAttemptIdentifier());
} catch (IOException ioe) {
// Close the streams
IOUtils.cleanup(LOG, input);
// Re-throw
throw ioe;
}
}
public static void shuffleToDisk(DiskFetchedInput fetchedInput,
InputStream input, long compressedLength, Log LOG)
throws IOException {
// Copy data to local-disk
OutputStream output = fetchedInput.getOutputStream();
long bytesLeft = compressedLength;
try {
final int BYTES_TO_READ = 64 * 1024;
byte[] buf = new byte[BYTES_TO_READ];
while (bytesLeft > 0) {
int n = input.read(buf, 0, (int) Math.min(bytesLeft, BYTES_TO_READ));
if (n < 0) {
throw new IOException("read past end of stream reading "
+ fetchedInput.getInputAttemptIdentifier());
}
output.write(buf, 0, n);
bytesLeft -= n;
// metrics.inputBytes(n);
}
LOG.info("Read " + (compressedLength - bytesLeft)
+ " bytes from input for " + fetchedInput.getInputAttemptIdentifier());
output.close();
} catch (IOException ioe) {
// Close the streams
IOUtils.cleanup(LOG, input, output);
// Re-throw
throw ioe;
}
// Sanity check
if (bytesLeft != 0) {
throw new IOException("Incomplete input received for "
+ fetchedInput.getInputAttemptIdentifier() + " ("
+ bytesLeft + " bytes missing of " + compressedLength + ")");
}
}
// TODO NEWTEZ handle ssl shuffle
public static StringBuilder constructBaseURIForShuffleHandler(String host, int port, int partition, ApplicationId appId) {
StringBuilder sb = new StringBuilder("http://");
sb.append(host);
sb.append(":");
sb.append(String.valueOf(port));
sb.append("/");
sb.append("mapOutput?job=");
sb.append(appId.toString().replace("application", "job"));
sb.append("&reduce=");
sb.append(String.valueOf(partition));
sb.append("&map=");
return sb;
}
}