org.apache.flink.runtime.highavailability.nonha.embedded

Class EmbeddedLeaderService

java.lang.Object

org.apache.flink.runtime.highavailability.nonha.embedded.EmbeddedLeaderService

public class EmbeddedLeaderService
extends Object

A simple leader election service, which selects a leader among contenders and notifies listeners.

An election service for contenders can be created via createLeaderElectionService(), a listener service for leader observers can be created via createLeaderRetrievalService().

Constructor Summary

Constructors

Constructor and Description
EmbeddedLeaderService(Executor notificationsDispatcher)

Method Summary

Modifier and Type	Method and Description
LeaderElectionService	createLeaderElectionService()
LeaderRetrievalService	createLeaderRetrievalService()
boolean	isShutdown()
void	shutdown() Shuts down this leader election service.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmbeddedLeaderService

public EmbeddedLeaderService(Executor notificationsDispatcher)

Method Detail

shutdown

public void shutdown()

Shuts down this leader election service.

This method does not perform a clean revocation of the leader status and no notification to any leader listeners. It simply notifies all contenders and listeners that the service is no longer available.

isShutdown

@VisibleForTesting
public boolean isShutdown()

createLeaderElectionService

public LeaderElectionService createLeaderElectionService()

createLeaderRetrievalService

public LeaderRetrievalService createLeaderRetrievalService()