org.apache.flink.runtime.jobmaster

类 JobMasterServiceLeadershipRunner

java.lang.Object

org.apache.flink.runtime.jobmaster.JobMasterServiceLeadershipRunner

所有已实现的接口:

AutoCloseable, JobManagerRunner, LeaderContender, org.apache.flink.util.AutoCloseableAsync

public class JobMasterServiceLeadershipRunner
extends Object
implements JobManagerRunner, LeaderContender

Leadership runner for the JobMasterServiceProcess.

The responsibility of this component is to manage the leadership of the JobMasterServiceProcess. This means that the runner will create an instance of the process when it obtains the leadership. The process is stopped once the leadership is revoked.

This component only accepts signals (job result completion, initialization failure) as long as it is running and as long as the signals are coming from the current leader process. This ensures that only the current leader can affect this component.

All leadership operations are serialized. This means that granting the leadership has to complete before the leadership can be revoked and vice versa.

The resultFuture can be completed with the following values: * *

• JobManagerRunnerResult to signal an initialization failure of the JobMasterService or the completion of a job
• Exception to signal an unexpected failure

构造器概要

构造器

构造器和说明
JobMasterServiceLeadershipRunner(JobMasterServiceProcessFactory jobMasterServiceProcessFactory, LeaderElectionService leaderElectionService, JobResultStore jobResultStore, LibraryCacheManager.ClassLoaderLease classLoaderLease, org.apache.flink.runtime.rpc.FatalErrorHandler fatalErrorHandler)

方法概要

限定符和类型	方法和说明
CompletableFuture<Acknowledge>	cancel(org.apache.flink.api.common.time.Time timeout) Cancels the currently executed job.
CompletableFuture<Void>	closeAsync()
org.apache.flink.api.common.JobID	getJobID() Get the job id of the executed job.
CompletableFuture<JobMasterGateway>	getJobMasterGateway() Get the JobMasterGateway of the JobMaster.
CompletableFuture<JobManagerRunnerResult>	getResultFuture() Get the result future of this runner.
void	grantLeadership(UUID leaderSessionID) Callback method which is called by the LeaderElectionService upon selecting this instance as the new leader.
void	handleError(Exception exception) Callback method which is called by LeaderElectionService in case of an error in the service thread.
boolean	isInitialized() Flag indicating if the JobManagerRunner has been initialized.
CompletableFuture<ExecutionGraphInfo>	requestJob(org.apache.flink.api.common.time.Time timeout) Requests the ExecutionGraphInfo of the executed job.
CompletableFuture<JobDetails>	requestJobDetails(org.apache.flink.api.common.time.Time timeout) Request the details of the executed job.
CompletableFuture<org.apache.flink.api.common.JobStatus>	requestJobStatus(org.apache.flink.api.common.time.Time timeout) Requests the current job status.
void	revokeLeadership() Callback method which is called by the LeaderElectionService upon revoking the leadership of a former leader.
void	start() Start the execution of the JobMaster.

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.util.AutoCloseableAsync

close

从接口继承的方法 org.apache.flink.runtime.leaderelection.LeaderContender

getDescription

构造器详细资料

JobMasterServiceLeadershipRunner

public JobMasterServiceLeadershipRunner(JobMasterServiceProcessFactory jobMasterServiceProcessFactory,
                                        LeaderElectionService leaderElectionService,
                                        JobResultStore jobResultStore,
                                        LibraryCacheManager.ClassLoaderLease classLoaderLease,
                                        org.apache.flink.runtime.rpc.FatalErrorHandler fatalErrorHandler)

方法详细资料

closeAsync

public CompletableFuture<Void> closeAsync()

指定者:

closeAsync 在接口中 org.apache.flink.util.AutoCloseableAsync

start

public void start()
           throws Exception

从接口复制的说明: JobManagerRunner

Start the execution of the JobMaster.

指定者:

start 在接口中 JobManagerRunner

抛出:

Exception - if the JobMaster cannot be started

getJobMasterGateway

public CompletableFuture<JobMasterGateway> getJobMasterGateway()

从接口复制的说明: JobManagerRunner

Get the JobMasterGateway of the JobMaster. The future is only completed if the JobMaster becomes leader.

指定者:

getJobMasterGateway 在接口中 JobManagerRunner

返回:

Future with the JobMasterGateway once the underlying JobMaster becomes leader

getResultFuture

public CompletableFuture<JobManagerRunnerResult> getResultFuture()

从接口复制的说明: JobManagerRunner

Get the result future of this runner. The future is completed once the executed job reaches a globally terminal state or if the initialization of the JobMaster fails. If the result future is completed exceptionally via JobNotFinishedException, then this signals that the job has not been completed successfully. All other exceptional completions denote an unexpected exception which leads to a process restart.

指定者:

getResultFuture 在接口中 JobManagerRunner

返回:

Future which is completed with the job result

getJobID

public org.apache.flink.api.common.JobID getJobID()

从接口复制的说明: JobManagerRunner

Get the job id of the executed job.

指定者:

getJobID 在接口中 JobManagerRunner

返回:

job id of the executed job

cancel

public CompletableFuture<Acknowledge> cancel(org.apache.flink.api.common.time.Time timeout)

从接口复制的说明: JobManagerRunner

Cancels the currently executed job.

指定者:

cancel 在接口中 JobManagerRunner

参数:

timeout - of this operation

返回:

Future acknowledge of the operation

requestJobStatus

public CompletableFuture<org.apache.flink.api.common.JobStatus> requestJobStatus(org.apache.flink.api.common.time.Time timeout)

从接口复制的说明: JobManagerRunner

Requests the current job status.

指定者:

requestJobStatus 在接口中 JobManagerRunner

参数:

timeout - for the rpc call

返回:

Future containing the current job status

requestJobDetails

public CompletableFuture<JobDetails> requestJobDetails(org.apache.flink.api.common.time.Time timeout)

从接口复制的说明: JobManagerRunner

Request the details of the executed job.

指定者:

requestJobDetails 在接口中 JobManagerRunner

参数:

timeout - for the rpc call

返回:

Future details of the executed job

requestJob

public CompletableFuture<ExecutionGraphInfo> requestJob(org.apache.flink.api.common.time.Time timeout)

从接口复制的说明: JobManagerRunner

Requests the ExecutionGraphInfo of the executed job.

指定者:

requestJob 在接口中 JobManagerRunner

参数:

timeout - for the rpc call

返回:

Future which is completed with the ExecutionGraphInfo of the executed job

isInitialized

public boolean isInitialized()

从接口复制的说明: JobManagerRunner

Flag indicating if the JobManagerRunner has been initialized.

指定者:

isInitialized 在接口中 JobManagerRunner

返回:

true if the JobManagerRunner has been initialized.

grantLeadership

public void grantLeadership(UUID leaderSessionID)

从接口复制的说明: LeaderContender

Callback method which is called by the LeaderElectionService upon selecting this instance as the new leader. The method is called with the new leader session ID.

指定者:

grantLeadership 在接口中 LeaderContender

参数:

leaderSessionID - New leader session ID

revokeLeadership

public void revokeLeadership()

从接口复制的说明: LeaderContender

Callback method which is called by the LeaderElectionService upon revoking the leadership of a former leader. This might happen in case that multiple contenders have been granted leadership.

指定者:

revokeLeadership 在接口中 LeaderContender

handleError

public void handleError(Exception exception)

从接口复制的说明: LeaderContender

Callback method which is called by LeaderElectionService in case of an error in the service thread.

指定者:

handleError 在接口中 LeaderContender

参数:

exception - Caught exception