com.hazelcast.mapreduce.impl

Class MapReduceService

java.lang.Object

com.hazelcast.mapreduce.impl.MapReduceService

All Implemented Interfaces:

ManagedService, RemoteService

public class MapReduceService
extends Object
implements ManagedService, RemoteService

The MapReduceService class is the base point for the map reduce implementation. It is used to collect and control a lot of the basic lifecycle events for JobTracker instances and their corresponding JobSupervisors.

Field Summary

Fields

Modifier and Type	Field and Description
static String	SERVICE_NAME

Constructor Summary

Constructors

Constructor and Description
MapReduceService(NodeEngine nodeEngine)

Method Summary

Modifier and Type	Method and Description
boolean	checkAssignedMembersAvailable(Collection<Address> assignedMembers)
DistributedObject	createDistributedObject(String objectName) Creates a distributed object.
JobSupervisor	createJobSupervisor(JobTaskConfiguration configuration)
void	destroyDistributedObject(String objectName) Destroys a distributed object.
boolean	destroyJobSupervisor(JobSupervisor supervisor)
void	dispatchEvent(MapReduceNotification notification)
ExecutorService	getExecutorService(String name)
JobSupervisor	getJobSupervisor(String name, String jobId)
JobTracker	getJobTracker(String name)
Address	getKeyMember(Object key)
Address	getLocalAddress()
NodeEngine	getNodeEngine()
void	init(NodeEngine nodeEngine, Properties properties) Initializes this service.
<R> R	processRequest(Address address, ProcessingOperation processingOperation)
boolean	registerJobSupervisorCancellation(String name, String jobId, Address jobOwner)
void	reset() Resets this service back to its initial state.
void	sendNotification(Address address, MapReduceNotification notification)
void	shutdown(boolean terminate) Shuts down this service.
boolean	unregisterJobSupervisorCancellation(String name, String jobId)

Methods inherited from class java.lang.Object

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

Field Detail

SERVICE_NAME

public static final String SERVICE_NAME

See Also:

Constant Field Values

Constructor Detail

MapReduceService

public MapReduceService(NodeEngine nodeEngine)

Method Detail

getJobTracker

public JobTracker getJobTracker(String name)

getJobSupervisor

public JobSupervisor getJobSupervisor(String name,
                                      String jobId)

registerJobSupervisorCancellation

public boolean registerJobSupervisorCancellation(String name,
                                                 String jobId,
                                                 Address jobOwner)

unregisterJobSupervisorCancellation

public boolean unregisterJobSupervisorCancellation(String name,
                                                   String jobId)

createJobSupervisor

public JobSupervisor createJobSupervisor(JobTaskConfiguration configuration)

destroyJobSupervisor

public boolean destroyJobSupervisor(JobSupervisor supervisor)

getExecutorService

public ExecutorService getExecutorService(String name)

init

public void init(NodeEngine nodeEngine,
                 Properties properties)

Description copied from interface: ManagedService

Initializes this service.

Specified by:

init in interface ManagedService

Parameters:

nodeEngine - the NodeEngine that this service belongs to

properties - the Properties (can be used to pass settings to the service)

reset

public void reset()

Description copied from interface: ManagedService

Resets this service back to its initial state.

TODO: what is the purpose of reset

Specified by:

reset in interface ManagedService

shutdown

public void shutdown(boolean terminate)

Description copied from interface: ManagedService

Shuts down this service.

TODO: what is the purpose of the terminate variable

Specified by:

shutdown in interface ManagedService

Parameters:

terminate - true to shut down this service

createDistributedObject

public DistributedObject createDistributedObject(String objectName)

Description copied from interface: RemoteService

Creates a distributed object.

Specified by:

createDistributedObject in interface RemoteService

Parameters:

objectName - the name for the created distributed object

Returns:

the created distributed object

destroyDistributedObject

public void destroyDistributedObject(String objectName)

Description copied from interface: RemoteService

Destroys a distributed object.

Specified by:

destroyDistributedObject in interface RemoteService

Parameters:

objectName - the name of the distributed object to destroy

getKeyMember

public Address getKeyMember(Object key)

checkAssignedMembersAvailable

public boolean checkAssignedMembersAvailable(Collection<Address> assignedMembers)

processRequest

public <R> R processRequest(Address address,
                            ProcessingOperation processingOperation)
                     throws ExecutionException,
                            InterruptedException

Throws:

ExecutionException

InterruptedException

sendNotification

public void sendNotification(Address address,
                             MapReduceNotification notification)

getLocalAddress

public final Address getLocalAddress()

getNodeEngine

public NodeEngine getNodeEngine()

dispatchEvent

public void dispatchEvent(MapReduceNotification notification)