/**
* 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.nio.ByteBuffer;
import java.util.Collections;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
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.dag.api.TezUncheckedException;
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.DataMovementEvent;
import org.apache.tez.runtime.library.api.KeyValueWriter;
import org.apache.tez.runtime.library.broadcast.output.FileBasedKVWriter;
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.DataProto;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.protobuf.ByteString;
public class OnFileUnorderedKVOutput implements LogicalOutput {
private static final Log LOG = LogFactory.getLog(OnFileUnorderedKVOutput.class);
private TezOutputContext outputContext;
private FileBasedKVWriter kvWriter;
private Configuration conf;
private boolean dataViaEventsEnabled;
private int dataViaEventsMaxSize;
public OnFileUnorderedKVOutput() {
}
@Override
public List<Event> initialize(TezOutputContext outputContext)
throws Exception {
this.outputContext = outputContext;
this.conf = TezUtils.createConfFromUserPayload(outputContext
.getUserPayload());
this.conf.setStrings(TezJobConfig.LOCAL_DIRS,
outputContext.getWorkDirs());
this.dataViaEventsEnabled = conf.getBoolean(
TezJobConfig.TEZ_RUNTIME_BROADCAST_DATA_VIA_EVENTS_ENABLED,
TezJobConfig.TEZ_RUNTIME_BROADCAST_DATA_VIA_EVENTS_ENABLED_DEFAULT);
this.dataViaEventsMaxSize = conf.getInt(
TezJobConfig.TEZ_RUNTIME_BROADCAST_DATA_VIA_EVENTS_MAX_SIZE,
TezJobConfig.TEZ_RUNTIME_BROADCAST_DATA_VIA_EVENTS_MAX_SIZE_DEFAULT);
LOG.info(this.getClass().getSimpleName() + " running with params -> "
+ "dataViaEventsEnabled: " + dataViaEventsEnabled
+ ", dataViaEventsMaxSize: " + dataViaEventsMaxSize);
this.kvWriter = new FileBasedKVWriter(outputContext, conf);
return Collections.emptyList();
}
@Override
public KeyValueWriter getWriter() throws Exception {
return kvWriter;
}
@Override
public void handleEvents(List<Event> outputEvents) {
throw new TezUncheckedException("Not expecting any events");
}
@Override
public List<Event> close() throws Exception {
boolean outputGenerated = this.kvWriter.close();
DataMovementEventPayloadProto.Builder payloadBuilder = DataMovementEventPayloadProto
.newBuilder();
LOG.info("Closing KVOutput: RawLength: " + this.kvWriter.getRawLength()
+ ", CompressedLength: " + this.kvWriter.getCompressedLength());
if (dataViaEventsEnabled && outputGenerated && this.kvWriter.getCompressedLength() <= dataViaEventsMaxSize) {
LOG.info("Serialzing actual data into DataMovementEvent, dataSize: " + this.kvWriter.getCompressedLength());
byte[] data = this.kvWriter.getData();
DataProto.Builder dataProtoBuilder = DataProto.newBuilder();
dataProtoBuilder.setData(ByteString.copyFrom(data));
dataProtoBuilder.setRawLength((int)this.kvWriter.getRawLength());
dataProtoBuilder.setCompressedLength((int)this.kvWriter.getCompressedLength());
payloadBuilder.setData(dataProtoBuilder.build());
}
String host = getHost();
ByteBuffer shuffleMetadata = outputContext
.getServiceProviderMetaData(ShuffleUtils.SHUFFLE_HANDLER_SERVICE_ID);
int shufflePort = ShuffleUtils
.deserializeShuffleProviderMetaData(shuffleMetadata);
payloadBuilder.setOutputGenerated(outputGenerated);
if (outputGenerated) {
payloadBuilder.setHost(host);
payloadBuilder.setPort(shufflePort);
payloadBuilder.setPathComponent(outputContext.getUniqueIdentifier());
}
DataMovementEventPayloadProto payloadProto = payloadBuilder.build();
DataMovementEvent dmEvent = new DataMovementEvent(0,
payloadProto.toByteArray());
List<Event> events = Lists.newArrayListWithCapacity(1);
events.add(dmEvent);
return events;
}
@Override
public void setNumPhysicalOutputs(int numOutputs) {
Preconditions.checkArgument(numOutputs == 1,
"Number of outputs can only be 1 for " + this.getClass().getName());
}
@VisibleForTesting
@Private
String getHost() {
return System.getenv(ApplicationConstants.Environment.NM_HOST.toString());
}
}