Package org.apache.flink.runtime.leaderelection

Interface LeaderContender

All Known Implementing Classes:
DefaultDispatcherRunner, DispatcherRestEndpoint, JobMasterServiceLeadershipRunner, MiniDispatcherRestEndpoint, ResourceManagerServiceImpl, WebMonitorEndpoint
public interface LeaderContender
Interface which has to be implemented to take part in the leader election process of the LeaderElectionService.

  • Method Details

    • grantLeadership

      void grantLeadership(UUID leaderSessionID)
      Callback method which is called by the LeaderElectionService upon selecting this instance as the new leader. The method is called with the new leader session ID.
      Parameters:
      leaderSessionID - New leader session ID

    • revokeLeadership

      void revokeLeadership()
      Callback method which is called by the LeaderElectionService upon revoking the leadership of a former leader. This might happen in case that multiple contenders have been granted leadership.

    • handleError

      void handleError(Exception exception)
      Callback method which is called by LeaderElectionService in case of an error in the service thread.
      Parameters:
      exception - Caught exception