org.apache.flink.runtime.resourcemanager

Class DefaultJobLeaderIdService

java.lang.Object

org.apache.flink.runtime.resourcemanager.DefaultJobLeaderIdService

All Implemented Interfaces:

JobLeaderIdService

public class DefaultJobLeaderIdService
extends Object
implements JobLeaderIdService

Service which retrieves for a registered job the current job leader id (the leader id of the job manager responsible for the job). The leader id will be exposed as a future via the getLeaderId(JobID). The future will only be completed with an exception in case the service will be stopped.

Constructor Summary

Constructors

Constructor and Description
DefaultJobLeaderIdService(HighAvailabilityServices highAvailabilityServices, ScheduledExecutor scheduledExecutor, Time jobTimeout)

Method Summary

Modifier and Type	Method and Description
void	addJob(JobID jobId) Add a job to be monitored to retrieve the job leader id.
void	clear() Stop and clear the currently registered job leader id listeners.
boolean	containsJob(JobID jobId) Check whether the given job is being monitored or not.
CompletableFuture<JobMasterId>	getLeaderId(JobID jobId) Get the leader's JobMasterId future for the given job.
boolean	isStarted() Checks whether the service has been started.
boolean	isValidTimeout(JobID jobId, UUID timeoutId) Checks whether the given timeoutId for the given jobId is valid or not.
void	removeJob(JobID jobId) Remove the given job from being monitored by the service.
void	start(JobLeaderIdActions initialJobLeaderIdActions) Start the service with the given job leader actions.
void	stop() Stop the service.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultJobLeaderIdService

public DefaultJobLeaderIdService(HighAvailabilityServices highAvailabilityServices,
                                 ScheduledExecutor scheduledExecutor,
                                 Time jobTimeout)

Method Detail

start

public void start(JobLeaderIdActions initialJobLeaderIdActions)
           throws Exception

Description copied from interface: JobLeaderIdService

Start the service with the given job leader actions.

Specified by:

start in interface JobLeaderIdService

Parameters:

initialJobLeaderIdActions - to use for job leader id actions

Throws:

Exception - which is thrown when clearing up old state

stop

public void stop()
          throws Exception

Description copied from interface: JobLeaderIdService

Stop the service.

Specified by:

stop in interface JobLeaderIdService

Throws:

Exception - which is thrown in case a retrieval service cannot be stopped properly

isStarted

public boolean isStarted()

Checks whether the service has been started.

Returns:

True if the service has been started; otherwise false

clear

public void clear()
           throws Exception

Description copied from interface: JobLeaderIdService

Stop and clear the currently registered job leader id listeners.

Specified by:

clear in interface JobLeaderIdService

Throws:

Exception - which is thrown in case a retrieval service cannot be stopped properly

addJob

public void addJob(JobID jobId)
            throws Exception

Description copied from interface: JobLeaderIdService

Add a job to be monitored to retrieve the job leader id.

Specified by:

addJob in interface JobLeaderIdService

Parameters:

jobId - identifying the job to monitor

Throws:

Exception - if the job could not be added to the service

removeJob

public void removeJob(JobID jobId)
               throws Exception

Description copied from interface: JobLeaderIdService

Remove the given job from being monitored by the service.

Specified by:

removeJob in interface JobLeaderIdService

Parameters:

jobId - identifying the job to remove from monitor

Throws:

Exception - if removing the job fails

containsJob

public boolean containsJob(JobID jobId)

Description copied from interface: JobLeaderIdService

Check whether the given job is being monitored or not.

Specified by:

containsJob in interface JobLeaderIdService

Parameters:

jobId - identifying the job

Returns:

True if the job is being monitored; otherwise false

getLeaderId

public CompletableFuture<JobMasterId> getLeaderId(JobID jobId)
                                           throws Exception

Description copied from interface: JobLeaderIdService

Get the leader's JobMasterId future for the given job.

Specified by:

getLeaderId in interface JobLeaderIdService

Parameters:

jobId - jobId specifying for which job to retrieve the JobMasterId

Returns:

Future with the current leader's JobMasterId

Throws:

Exception - if retrieving the JobMasterId cannot be started

isValidTimeout

public boolean isValidTimeout(JobID jobId,
                              UUID timeoutId)

Description copied from interface: JobLeaderIdService

Checks whether the given timeoutId for the given jobId is valid or not.

Specified by:

isValidTimeout in interface JobLeaderIdService

Parameters:

jobId - jobId identifying the job for which the timeout should be checked

timeoutId - timeoutId specifying the timeout which should be checked for its validity

Returns:

true if the timeout is valid; otherwise false