/**
* 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.output;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.api.ApplicationConstants;
import org.apache.tez.common.TezJobConfig;
import org.apache.tez.common.TezUtils;
import org.apache.tez.common.counters.TaskCounter;
import org.apache.tez.runtime.api.Event;
import org.apache.tez.runtime.api.LogicalOutput;
import org.apache.tez.runtime.api.TezOutputContext;
import org.apache.tez.runtime.api.events.CompositeDataMovementEvent;
import org.apache.tez.runtime.api.events.VertexManagerEvent;
import org.apache.tez.runtime.library.api.KeyValueWriter;
import org.apache.tez.runtime.library.common.sort.impl.ExternalSorter;
import org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter;
import org.apache.tez.runtime.library.common.sort.impl.dflt.DefaultSorter;
import org.apache.tez.runtime.library.shuffle.common.ShuffleUtils;
import org.apache.tez.runtime.library.shuffle.impl.ShuffleUserPayloads.DataMovementEventPayloadProto;
import org.apache.tez.runtime.library.shuffle.impl.ShuffleUserPayloads.VertexManagerEventPayloadProto;
import com.google.common.collect.Lists;
/**
* <code>OnFileSortedOutput</code> is an {@link LogicalOutput} which sorts key/value pairs
* written to it and persists it to a file.
*/
public class OnFileSortedOutput implements LogicalOutput {
protected ExternalSorter sorter;
protected Configuration conf;
protected int numOutputs;
protected TezOutputContext outputContext;
private long startTime;
private long endTime;
private final AtomicBoolean isStarted = new AtomicBoolean(false);
@Override
public List<Event> initialize(TezOutputContext outputContext)
throws IOException {
this.startTime = System.nanoTime();
this.outputContext = outputContext;
this.conf = TezUtils.createConfFromUserPayload(outputContext.getUserPayload());
// Initializing this parametr in this conf since it is used in multiple
// places (wherever LocalDirAllocator is used) - TezTaskOutputFiles,
// TezMerger, etc.
this.conf.setStrings(TezJobConfig.LOCAL_DIRS, outputContext.getWorkDirs());
if (this.conf.getInt(TezJobConfig.TEZ_RUNTIME_SORT_THREADS,
TezJobConfig.DEFAULT_TEZ_RUNTIME_SORT_THREADS) > 1) {
sorter = new PipelinedSorter();
} else {
sorter = new DefaultSorter();
}
sorter.initialize(outputContext, conf, numOutputs);
return Collections.emptyList();
}
@Override
public void start() throws Exception {
if (!isStarted.getAndSet(true)) {
sorter.start();
}
}
@Override
public KeyValueWriter getWriter() throws IOException {
return new KeyValueWriter() {
@Override
public void write(Object key, Object value) throws IOException {
sorter.write(key, value);
}
};
}
@Override
public void handleEvents(List<Event> outputEvents) {
// Not expecting any events.
}
@Override
public void setNumPhysicalOutputs(int numOutputs) {
this.numOutputs = numOutputs;
}
@Override
public List<Event> close() throws IOException {
sorter.flush();
sorter.close();
this.endTime = System.nanoTime();
return generateEventsOnClose();
}
protected List<Event> generateEventsOnClose() throws IOException {
String host = System.getenv(ApplicationConstants.Environment.NM_HOST
.toString());
ByteBuffer shuffleMetadata = outputContext
.getServiceProviderMetaData(ShuffleUtils.SHUFFLE_HANDLER_SERVICE_ID);
int shufflePort = ShuffleUtils.deserializeShuffleProviderMetaData(shuffleMetadata);
DataMovementEventPayloadProto.Builder payloadBuilder = DataMovementEventPayloadProto
.newBuilder();
payloadBuilder.setHost(host);
payloadBuilder.setPort(shufflePort);
payloadBuilder.setPathComponent(outputContext.getUniqueIdentifier());
payloadBuilder.setRunDuration((int) ((endTime - startTime) / 1000));
DataMovementEventPayloadProto payloadProto = payloadBuilder.build();
byte[] payloadBytes = payloadProto.toByteArray();
long outputSize = outputContext.getCounters()
.findCounter(TaskCounter.MAP_OUTPUT_BYTES).getValue();
VertexManagerEventPayloadProto.Builder vmBuilder = VertexManagerEventPayloadProto
.newBuilder();
vmBuilder.setOutputSize(outputSize);
VertexManagerEvent vmEvent = new VertexManagerEvent(
outputContext.getDestinationVertexName(), vmBuilder.build().toByteArray());
List<Event> events = Lists.newArrayListWithCapacity(numOutputs+1);
events.add(vmEvent);
CompositeDataMovementEvent csdme = new CompositeDataMovementEvent(0, numOutputs, payloadBytes);
events.add(csdme);
return events;
}
}