com.hazelcast.mapreduce.impl.operation

Class KeysAssignmentOperation

java.lang.Object

com.hazelcast.spi.Operation

com.hazelcast.spi.AbstractOperation

com.hazelcast.mapreduce.impl.operation.ProcessingOperation

com.hazelcast.mapreduce.impl.operation.KeysAssignmentOperation

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable

public class KeysAssignmentOperation
extends ProcessingOperation

This operation is used to request assignment for keys on the job owners node. The job owner is the only node capable of assigning those reducing nodes to be aware of the number of reducers per partition and also aware of possible topology changes while executing the job.

Field Summary

Fields inherited from class com.hazelcast.spi.Operation

CALL_ID_LOCAL_SKIPPED, GENERIC_PARTITION_ID

Constructor Summary

Constructors

Constructor and Description
KeysAssignmentOperation()
KeysAssignmentOperation(String name, String jobId, Set<Object> keys)

Method Summary

Methods

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()
protected void	readInternal(ObjectDataInput in)
void	run()
protected void	writeInternal(ObjectDataOutput out)

Methods inherited from class com.hazelcast.mapreduce.impl.operation.ProcessingOperation

getJobId, getName, getServiceName, toString

Methods inherited from class com.hazelcast.spi.AbstractOperation

afterRun, beforeRun, returnsResponse

Methods inherited from class com.hazelcast.spi.Operation

getCallerAddress, getCallerUuid, getCallId, getCallTimeout, getConnection, getInvocationTime, getLogger, getNodeEngine, getOperationResponseHandler, getPartitionId, getReplicaIndex, getResponseHandler, getService, getWaitTimeout, isUrgent, logError, onException, onExecutionFailure, onInvocationException, onSetCallId, readData, sendResponse, setCallerUuid, setNodeEngine, setOperationResponseHandler, setPartitionId, setReplicaIndex, setResponseHandler, 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

Constructor Detail

KeysAssignmentOperation

public KeysAssignmentOperation()

KeysAssignmentOperation

public KeysAssignmentOperation(String name,
                       String jobId,
                       Set<Object> keys)

Method Detail

getResponse

public Object getResponse()

Overrides:

getResponse in class AbstractOperation

run

public void run()
         throws Exception

Specified by:

run in class Operation

Throws:

Exception

writeInternal

protected void writeInternal(ObjectDataOutput out)
                      throws IOException

Overrides:

writeInternal in class ProcessingOperation

Throws:

IOException

readInternal

protected void readInternal(ObjectDataInput in)
                     throws IOException

Overrides:

readInternal in class ProcessingOperation

Throws:

IOException

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory id for this class.

Returns:

factory id

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

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

Returns:

type id