| 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 Mapper | MapReduceForMapMessageTask. getMapper() | 
| protected Mapper | MapReduceForSetMessageTask. getMapper() | 
| protected abstract Mapper | AbstractMapReduceTask. getMapper() | 
| protected Mapper | MapReduceForCustomMessageTask. getMapper() | 
| protected Mapper | MapReduceForListMessageTask. getMapper() | 
| protected Mapper | MapReduceForMultiMapMessageTask. getMapper() | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | LifecycleMapper<KeyIn,ValueIn,KeyOut,ValueOut>The LifecycleMapper interface is a more sophisticated version of  Mappernormally used for more complex
 algorithms with a need for initialization and finalization. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | LifecycleMapperAdapter<KeyIn,ValueIn,KeyOut,ValueOut>
 The abstract LifecycleMapperAdapter superclass is used to ease building mappers for the  Job. | 
| Modifier and Type | Method and Description | 
|---|---|
| <KeyOut,ValueOut>  | Job. mapper(Mapper<KeyIn,ValueIn,KeyOut,ValueOut> mapper)Defines the mapper for this task. | 
| Modifier and Type | Method and Description | 
|---|---|
| Mapper | Aggregation. getMapper(Supplier<Key,?,Supplied> supplier)Returns the Mapper for this aggregation. | 
| Modifier and Type | Field and Description | 
|---|---|
| protected Mapper<KeyIn,ValueIn,?,?> | AbstractJob. mapper | 
| Modifier and Type | Method and Description | 
|---|---|
| <KeyOut,ValueOut>  | AbstractJob. mapper(Mapper<KeyIn,ValueIn,KeyOut,ValueOut> mapper) | 
| Modifier and Type | Field and Description | 
|---|---|
| protected Mapper | ClientMapReduceRequest. mapper | 
| 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 | 
|---|---|
| Mapper | JobTaskConfiguration. getMapper() | 
| Modifier and Type | Method and Description | 
|---|---|
| void | KeyValueSourceMappingPhase. executeMappingPhase(KeyValueSource<KeyIn,ValueIn> keyValueSource,
                   Mapper<KeyIn,ValueIn,KeyOut,ValueOut> mapper,
                   Context<KeyOut,ValueOut> context) | 
| protected abstract void | MappingPhase. executeMappingPhase(KeyValueSource<KeyIn,ValueIn> keyValueSource,
                   Mapper<KeyIn,ValueIn,KeyOut,ValueOut> mapper,
                   Context<KeyOut,ValueOut> context) | 
| Constructor and Description | 
|---|
| 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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