| Package | Description | 
|---|---|
| com.hazelcast.client.impl.protocol.task.mapreduce | Client protocol tasks implementations for map reduce | 
| 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.aggregation | This package contains the aggregation API and the convenience helper classes
 to retrieve predefined aggregation implementations. | 
| com.hazelcast.mapreduce.aggregation.impl | This package contains a set of predefined aggregation implementations | 
| com.hazelcast.mapreduce.impl | This package contains the default implementation for the map reduce framework
 internals. | 
| com.hazelcast.mapreduce.impl.client | This package contains request and response classes for communication between cluster
 members and Hazelcast native clients | 
| com.hazelcast.mapreduce.impl.operation | This package contains all remote operations that are needed to control work on
 supervising or worker nodes. | 
| com.hazelcast.mapreduce.impl.task | This package contains the base implementation for a standard map reduce job. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected CombinerFactory | MapReduceForMapMessageTask. getCombinerFactory() | 
| protected CombinerFactory | MapReduceForSetMessageTask. getCombinerFactory() | 
| protected abstract CombinerFactory | AbstractMapReduceTask. getCombinerFactory() | 
| protected CombinerFactory | MapReduceForCustomMessageTask. getCombinerFactory() | 
| protected CombinerFactory | MapReduceForListMessageTask. getCombinerFactory() | 
| protected CombinerFactory | MapReduceForMultiMapMessageTask. getCombinerFactory() | 
| Modifier and Type | Method and Description | 
|---|---|
| <ValueOut> ReducingJob<EntryKey,KeyIn,ValueOut> | MappingJob. combiner(CombinerFactory<? super KeyIn,? super ValueIn,? extends ValueOut> combinerFactory)Defines the  CombinerFactoryfor this task. | 
| Modifier and Type | Method and Description | 
|---|---|
| CombinerFactory | Aggregation. getCombinerFactory()Returns the CombinerFactory for this aggregation to pre-reduce values on mapping
 nodes. | 
| Modifier and Type | Field and Description | 
|---|---|
| protected CombinerFactory<?,?,?> | AbstractJob. combinerFactory | 
| Modifier and Type | Method and Description | 
|---|---|
| <ValueOut> ReducingJob<EntryKey,Key,ValueOut> | AbstractJob.MappingJobImpl. combiner(CombinerFactory<? super Key,? super Value,? extends ValueOut> combinerFactory) | 
| Modifier and Type | Field and Description | 
|---|---|
| protected CombinerFactory | ClientMapReduceRequest. combinerFactory | 
| Constructor and Description | 
|---|
| ClientMapReduceRequest(String name,
                      String jobId,
                      Collection keys,
                      KeyPredicate predicate,
                      Mapper mapper,
                      CombinerFactory combinerFactory,
                      ReducerFactory reducerFactory,
                      KeyValueSource keyValueSource,
                      int chunkSize,
                      TopologyChangedStrategy topologyChangedStrategy) | 
| Constructor and Description | 
|---|
| KeyValueJobOperation(String name,
                    String jobId,
                    int chunkSize,
                    KeyValueSource<K,V> keyValueSource,
                    Mapper mapper,
                    CombinerFactory combinerFactory,
                    ReducerFactory reducerFactory,
                    boolean communicateStats,
                    TopologyChangedStrategy topologyChangedStrategy) | 
| Modifier and Type | Method and Description | 
|---|---|
| CombinerFactory | JobTaskConfiguration. getCombinerFactory() | 
| Constructor and Description | 
|---|
| DefaultContext(CombinerFactory<KeyIn,ValueIn,?> combinerFactory,
              MapCombineTask mapCombineTask) | 
| JobTaskConfiguration(Address jobOwner,
                    NodeEngine nodeEngine,
                    int chunkSize,
                    String name,
                    String jobId,
                    Mapper mapper,
                    CombinerFactory combinerFactory,
                    ReducerFactory reducerFactory,
                    KeyValueSource keyValueSource,
                    boolean communicateStats,
                    TopologyChangedStrategy topologyChangedStrategy) | 
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