/**
* 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.crunch.impl.mr.run;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.crunch.io.FormatBundle;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.serializer.Deserializer;
import org.apache.hadoop.io.serializer.SerializationFactory;
import org.apache.hadoop.io.serializer.Serializer;
import org.apache.hadoop.mapreduce.InputFormat;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.util.ReflectionUtils;
class CrunchInputSplit extends InputSplit implements Writable, Configurable {
private InputSplit inputSplit;
private int nodeIndex;
private FormatBundle<? extends InputFormat<?, ?>> bundle;
private Configuration conf;
public CrunchInputSplit() {
// default constructor
}
public CrunchInputSplit(
InputSplit inputSplit,
FormatBundle<? extends InputFormat<?, ?>> bundle,
int nodeIndex,
Configuration conf) {
this.inputSplit = inputSplit;
this.bundle = bundle;
this.nodeIndex = nodeIndex;
this.conf = conf;
}
@Override
public void setConf(Configuration conf) {
this.conf = conf;
if (bundle != null && conf != null) {
this.bundle.configure(conf);
}
}
@Override
public Configuration getConf() {
return conf;
}
public int getNodeIndex() {
return nodeIndex;
}
public InputSplit getInputSplit() {
return inputSplit;
}
public Class<? extends InputFormat<?, ?>> getInputFormatClass() {
return bundle.getFormatClass();
}
@Override
public long getLength() throws IOException, InterruptedException {
return inputSplit.getLength();
}
@Override
public String[] getLocations() throws IOException, InterruptedException {
return inputSplit.getLocations();
}
public void readFields(DataInput in) throws IOException {
nodeIndex = in.readInt();
bundle = new FormatBundle();
bundle.setConf(conf);
bundle.readFields(in);
bundle.configure(conf); // yay bootstrap!
Class<? extends InputSplit> inputSplitClass = (Class<? extends InputSplit>) readClass(in);
inputSplit = (InputSplit) ReflectionUtils.newInstance(inputSplitClass, conf);
SerializationFactory factory = new SerializationFactory(conf);
Deserializer deserializer = factory.getDeserializer(inputSplitClass);
deserializer.open((DataInputStream) in);
inputSplit = (InputSplit) deserializer.deserialize(inputSplit);
}
public void write(DataOutput out) throws IOException {
out.writeInt(nodeIndex);
bundle.write(out);
Text.writeString(out, inputSplit.getClass().getName());
SerializationFactory factory = new SerializationFactory(conf);
Serializer serializer = factory.getSerializer(inputSplit.getClass());
serializer.open((DataOutputStream) out);
serializer.serialize(inputSplit);
}
private Class readClass(DataInput in) throws IOException {
String className = Text.readString(in);
try {
return conf.getClassByName(className);
} catch (ClassNotFoundException e) {
throw new RuntimeException("readObject can't find class", e);
}
}
}