Package org.apache.flink.runtime.leaderretrieval

Interface LeaderRetrievalListener

All Known Implementing Classes:

ConnectionUtils.LeaderConnectingAddressListener, LeaderGatewayRetriever, LeaderRetrievalUtils.LeaderInformationListener, LeaderRetriever, RpcGatewayRetriever

public interface LeaderRetrievalListener

Classes which want to be notified about a changing leader by the LeaderRetrievalService have to implement this interface.

Method Summary

Modifier and Type	Method	Description
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.

Method Detail

notifyLeaderAddress

void notifyLeaderAddress(@Nullable
                         String leaderAddress,
                         @Nullable
                         UUID leaderSessionID)

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If both arguments are null then it signals that leadership was revoked without a new leader having been elected.

Parameters:

leaderAddress - The address of the new leader

leaderSessionID - The new leader session ID

handleError

void handleError(Exception exception)

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.

Parameters:

exception -