Package org.apache.hadoop.mapreduce.lib.reduce

Class WrappedReducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

@Public
@Evolving
public class WrappedReducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
extends Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>

A Reducer which wraps a given one to allow for custom Reducer.Context implementations.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer.Context

Constructor Summary

Constructors

Constructor	Description
WrappedReducer()

Method Summary

Modifier and Type	Method	Description
Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>.org.apache.hadoop.mapreduce.Reducer.Context	getReducerContext(ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext)	A a wrapped Reducer.Context for custom implementations.

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

cleanup, reduce, run, setup

Methods inherited from class java.lang.Object

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

Constructor Details

WrappedReducer

public WrappedReducer()

Method Details

getReducerContext

public Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>.org.apache.hadoop.mapreduce.Reducer.Context getReducerContext(ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext)

A a wrapped Reducer.Context for custom implementations.

Parameters:

reduceContext - ReduceContext to be wrapped

Returns:

a wrapped Reducer.Context for custom implementations