| Package | Description | 
|---|---|
| com.hazelcast.mapreduce | This package contains the MapReduce API definition for Hazelcast. All map reduce operations running in a distributed manner inside the active Hazelcast cluster. | 
| com.hazelcast.mapreduce.impl.task | This package contains the base implementation for a standard map reduce job. | 
| Modifier and Type | Method and Description | 
|---|---|
| Reducer<ValueIn,ValueOut> | ReducerFactory. newReducer(KeyIn key)Build a new  Reducerinstance specific to the supplied key. | 
| Modifier and Type | Method and Description | 
|---|---|
| <KeyIn,ValueIn,ValueOut>  | JobSupervisor. getReducerByKey(Object key) | 
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