com.hazelcast.mapreduce.impl.operation

Class KeyValueJobOperation<K,V>

java.lang.Object

com.hazelcast.spi.Operation

com.hazelcast.mapreduce.impl.operation.KeyValueJobOperation<K,V>

Type Parameters:

K - type of the key

V - type of the value

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable

public class KeyValueJobOperation<K,V>
extends Operation
implements IdentifiedDataSerializable

This operation is used to prepare a KeyValueSource based map reduce operation on all cluster members.

Field Summary

Fields

Modifier and Type	Field and Description
static MemberSelector	MEMBER_SELECTOR Selects members that will run this operation

Fields inherited from class com.hazelcast.spi.Operation

GENERIC_PARTITION_ID

Constructor Summary

Constructors

Constructor and Description
KeyValueJobOperation()
KeyValueJobOperation(String name, String jobId, int chunkSize, KeyValueSource<K,V> keyValueSource, Mapper mapper, CombinerFactory combinerFactory, ReducerFactory reducerFactory, boolean communicateStats, TopologyChangedStrategy topologyChangedStrategy)

Method Summary

Modifier and Type	Method and Description
int	getFactoryId() Returns DataSerializableFactory factory ID for this class.
int	getId() Returns type identifier for this class.
Object	getResponse() Called if and only if Operation.returnsResponse() returned true, shortly after Operation.run() returns.
String	getServiceName()
void	readInternal(ObjectDataInput in)
void	run() Runs the operation.
protected void	toString(StringBuilder sb) A template method allows for additional information to be passed into the Operation.toString() method.
void	writeInternal(ObjectDataOutput out)

Methods inherited from class com.hazelcast.spi.Operation

afterRun, beforeRun, call, executedLocally, getCallerAddress, getCallerUuid, getCallId, getCallTimeout, getConnection, getInvocationTime, getLogger, getNodeEngine, getOperationResponseHandler, getPartitionId, getReplicaIndex, getService, getWaitTimeout, isUrgent, logError, onExecutionFailure, onInvocationException, onSetCallId, readData, requiresExplicitServiceName, returnsResponse, sendResponse, setCallerUuid, setNodeEngine, setOperationResponseHandler, setPartitionId, setReplicaIndex, setService, setServiceName, setValidateTarget, setWaitTimeout, toString, validatesTarget, writeData

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hazelcast.nio.serialization.DataSerializable

readData, writeData

Field Detail

MEMBER_SELECTOR

public static final MemberSelector MEMBER_SELECTOR

Selects members that will run this operation

Constructor Detail

KeyValueJobOperation

public KeyValueJobOperation()

KeyValueJobOperation

public KeyValueJobOperation(String name,
                            String jobId,
                            int chunkSize,
                            KeyValueSource<K,V> keyValueSource,
                            Mapper mapper,
                            CombinerFactory combinerFactory,
                            ReducerFactory reducerFactory,
                            boolean communicateStats,
                            TopologyChangedStrategy topologyChangedStrategy)

Method Detail

getServiceName

public String getServiceName()

Overrides:

getServiceName in class Operation

run

public void run()
         throws Exception

Description copied from class: Operation

Runs the operation. Either the Operation.run() or Operation.call() method should be implemented; not both. Runs after wait-support, supposed to do actual operation

Overrides:

run in class Operation

Throws:

Exception

See Also:

Operation.call()

getResponse

public Object getResponse()

Description copied from class: Operation

Called if and only if Operation.returnsResponse() returned true, shortly after Operation.run() returns.

Overrides:

getResponse in class Operation

writeInternal

public void writeInternal(ObjectDataOutput out)
                   throws IOException

Overrides:

writeInternal in class Operation

Throws:

IOException

readInternal

public void readInternal(ObjectDataInput in)
                  throws IOException

Overrides:

readInternal in class Operation

Throws:

IOException

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory ID for this class.

Specified by:

getFactoryId in interface IdentifiedDataSerializable

Returns:

factory ID

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

Returns type identifier for this class. It should be unique per DataSerializableFactory.

Specified by:

getId in interface IdentifiedDataSerializable

Returns:

type ID

toString

protected void toString(StringBuilder sb)

Description copied from class: Operation

A template method allows for additional information to be passed into the Operation.toString() method. So an Operation subclass can override this method and add additional debugging content. The default implementation does nothing so one is not forced to provide an empty implementation. It is a good practice to always call the super.toString(stringBuffer) when implementing this method to make sure that the super class can inject content if needed.

Overrides:

toString in class Operation

Parameters:

sb - the StringBuilder to add the debug info to.