com.hazelcast.mapreduce.impl.task

Class MapCombineTask<KeyIn,ValueIn,KeyOut,ValueOut,Chunk>

java.lang.Object

com.hazelcast.mapreduce.impl.task.MapCombineTask<KeyIn,ValueIn,KeyOut,ValueOut,Chunk>

Type Parameters:

KeyIn - type of the input key

ValueIn - type of the input value

KeyOut - type of the emitted key

ValueOut - type of the emitted value

Chunk - type of the intermediate chunk (retrieved from combiners)

public class MapCombineTask<KeyIn,ValueIn,KeyOut,ValueOut,Chunk>
extends Object

This class actually executed the mapping-combine phase. It is responsible for opening / closing the KeyValueSource implementation and possible configuring the partitionId to operate on.

Constructor Summary

Constructors

Constructor and Description
MapCombineTask(JobTaskConfiguration configuration, JobSupervisor supervisor, MappingPhase<KeyIn,ValueIn,KeyOut,ValueOut> mappingPhase)

Method Summary

Modifier and Type	Method and Description
void	cancel()
int	getChunkSize()
String	getJobId()
String	getName()
static <K,V> Map<Address,Map<K,V>>	mapResultToMember(JobSupervisor supervisor, Map<K,V> result)
void	process()
void	processMapping(int partitionId, DefaultContext<KeyOut,ValueOut> context, KeyValueSource<KeyIn,ValueIn> keyValueSource, boolean partitionProcessor)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MapCombineTask

public MapCombineTask(JobTaskConfiguration configuration,
                      JobSupervisor supervisor,
                      MappingPhase<KeyIn,ValueIn,KeyOut,ValueOut> mappingPhase)

Method Detail

getName

public String getName()

getJobId

public String getJobId()

getChunkSize

public int getChunkSize()

cancel

public void cancel()

process

public void process()

processMapping

public final void processMapping(int partitionId,
                                 DefaultContext<KeyOut,ValueOut> context,
                                 KeyValueSource<KeyIn,ValueIn> keyValueSource,
                                 boolean partitionProcessor)
                          throws Exception

Throws:

Exception

mapResultToMember

public static <K,V> Map<Address,Map<K,V>> mapResultToMember(JobSupervisor supervisor,
                                                            Map<K,V> result)