org.apache.flink.runtime.leaderelection

Interface LeaderElectionService

All Known Implementing Classes:

DefaultLeaderElectionService

public interface LeaderElectionService

Interface for a service which allows to elect a leader among a group of contenders.

Prior to using this service, it has to be started calling the start method. The start method takes the contender as a parameter. If there are multiple contenders, then each contender has to instantiate its own leader election service.

Once a contender has been granted leadership he has to confirm the received leader session ID by calling the method LeaderElection.confirmLeadership(UUID, String). This will notify the leader election service, that the contender has accepted the leadership specified and that the leader session id as well as the leader address can now be published for leader retrieval services.

Method Summary

Modifier and Type	Method and Description
LeaderElection	createLeaderElection(String componentId) Creates a new LeaderElection instance that is registered to this LeaderElectionService instance.

Method Detail

createLeaderElection

LeaderElection createLeaderElection(String componentId)

Creates a new LeaderElection instance that is registered to this LeaderElectionService instance.

Parameters:

componentId - a unique identifier that refers to the stored leader information that the newly created LeaderElection manages.