org.apache.flink.runtime.leaderretrieval

Interface LeaderRetrievalService

All Known Implementing Classes:

StandaloneLeaderRetrievalService, ZooKeeperLeaderRetrievalService

public interface LeaderRetrievalService

This interface has to be implemented by a service which retrieves the current leader and notifies a listener about it. Prior to using this service it has to be started by calling the start method. The start method also takes the LeaderRetrievalListener as an argument. The service can only be started once. The service should be stopped by calling the stop method.

Method Summary

Modifier and Type	Method and Description
void	start(LeaderRetrievalListener listener) Starts the leader retrieval service with the given listener to listen for new leaders.
void	stop() Stops the leader retrieval service.

Method Detail

start

void start(LeaderRetrievalListener listener)
    throws Exception

Starts the leader retrieval service with the given listener to listen for new leaders. This method can only be called once.

Parameters:

listener - The leader retrieval listener which will be notified about new leaders.

Throws:

Exception

stop

void stop()
   throws Exception

Stops the leader retrieval service.

Throws:

Exception