| Class | Description | 
|---|---|
| ChainMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT> | 
 The ChainMapper class allows to use multiple Mapper classes within a single
 Map task. 
 | 
| ChainReducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT> | 
 The ChainReducer class allows to chain multiple Mapper classes after a
 Reducer within the Reducer task. 
 | 
Copyright © 2016 Apache Software Foundation. All Rights Reserved.