Package org.apache.flink.runtime.util

Class LeaderRetrievalUtils.LeaderInformationListener

java.lang.Object

org.apache.flink.runtime.util.LeaderRetrievalUtils.LeaderInformationListener

All Implemented Interfaces:

LeaderRetrievalListener

Enclosing class:

LeaderRetrievalUtils

public static class LeaderRetrievalUtils.LeaderInformationListener
extends Object
implements LeaderRetrievalListener

Helper class which is used by the retrieveLeaderInformation method to retrieve the leader's rpc URL and the current leader session ID.

Constructor Summary

Constructors

Constructor	Description
LeaderInformationListener()

Method Summary

Modifier and Type	Method	Description
CompletableFuture<LeaderInformation>	getLeaderInformationFuture()
void	handleError(Exception exception)	This method is called by the LeaderRetrievalService in case of an exception.
void	notifyLeaderAddress(String leaderAddress, UUID leaderSessionID)	This method is called by the LeaderRetrievalService when a new leader is elected.

Methods inherited from class java.lang.Object

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

Constructor Details

LeaderInformationListener

public LeaderInformationListener()

Method Details

getLeaderInformationFuture

public CompletableFuture<LeaderInformation> getLeaderInformationFuture()

notifyLeaderAddress

public void notifyLeaderAddress(String leaderAddress,
 UUID leaderSessionID)

Description copied from interface: LeaderRetrievalListener

This method is called by the LeaderRetrievalService when a new leader is elected.

If both arguments are null then it signals that leadership was revoked without a new leader having been elected.

Specified by:

notifyLeaderAddress in interface LeaderRetrievalListener

Parameters:

leaderAddress - The address of the new leader

leaderSessionID - The new leader session ID

handleError

public void handleError(Exception exception)

Description copied from interface: LeaderRetrievalListener

This method is called by the LeaderRetrievalService in case of an exception. This assures that the LeaderRetrievalListener is aware of any problems occurring in the LeaderRetrievalService thread.

Specified by:

handleError in interface LeaderRetrievalListener