org.apache.hadoop.hbase.mapreduce

Class PutCombiner<K>

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<K,Put,K,Put>

org.apache.hadoop.hbase.mapreduce.PutCombiner<K>

@InterfaceAudience.Public
public class PutCombiner<K>
extends org.apache.hadoop.mapreduce.Reducer<K,Put,K,Put>

Combine Puts. Merges Put instances grouped by K into a single instance.

See Also:

TableMapReduceUtil

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
PutCombiner()

Method Summary

Modifier and Type	Method and Description
protected void	reduce(K row, Iterable<Put> vals, org.apache.hadoop.mapreduce.Reducer.Context context)

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

cleanup, run, setup

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

Constructor Detail

PutCombiner

public PutCombiner()

Method Detail

reduce

protected void reduce(K row,
                      Iterable<Put> vals,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<K,Put,K,Put>

Throws:

IOException

InterruptedException