org.apache.pig.backend.hadoop.executionengine.mapReduceLayer

Class DistinctCombiner.Combine

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.DistinctCombiner.Combine

Enclosing class:

DistinctCombiner

public static class DistinctCombiner.Combine
extends org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor and Description
DistinctCombiner.Combine()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	reduce(PigNullableWritable key, java.lang.Iterable<NullableTuple> tupIter, org.apache.hadoop.mapreduce.Reducer.Context context) The reduce function which removes values.
protected void	setup(org.apache.hadoop.mapreduce.Reducer.Context context) Configures the reporter

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

cleanup, run

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DistinctCombiner.Combine

public DistinctCombiner.Combine()

Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
              throws java.io.IOException,
                     java.lang.InterruptedException

Configures the reporter

Overrides:

setup in class org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

Throws:

java.io.IOException

java.lang.InterruptedException

reduce

protected void reduce(PigNullableWritable key,
          java.lang.Iterable<NullableTuple> tupIter,
          org.apache.hadoop.mapreduce.Reducer.Context context)
               throws java.io.IOException,
                      java.lang.InterruptedException

The reduce function which removes values.

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

Throws:

java.io.IOException

java.lang.InterruptedException