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>

@InterfaceAudience.Public
@InterfaceStability.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 WrappedReducer.Context implementations.

Nested Class Summary

class

WrappedReducer.Context

Constructor Summary

WrappedReducer()

Method Summary

Reducer.Context

getReducerContext(ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext) A a wrapped WrappedReducer.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 Detail

WrappedReducer

public WrappedReducer()

Method Detail

getReducerContext

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

A a wrapped WrappedReducer.Context for custom implementations.

Parameters:

reduceContext - ReduceContext to be wrapped

Returns:

a wrapped Reducer.Context for custom implementations