Package com.netflix.genie.web.tasks.leader

Class LocalLeader

  • @ThreadSafe
public class LocalLeader
extends java.lang.Object
    A class to control leadership activities when remote leadership isn't enabled and this node has been forcibly elected as the leader.
    Since:
    3.0.0

    • Constructor Summary

      Constructors 
      Constructor Description
      LocalLeader​(GenieEventBus genieEventBus, boolean isLeader)
      Constructor.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean isLeader()
      Whether local node is leader.
      boolean isRunning()
      Whether this module is active.
      void start()
      If configured to be leader, activate and send a leadership acquired notification.
      void startLeadership​(org.springframework.context.event.ContextRefreshedEvent event)
      Auto-start once application is up and running.
      void stop()
      If configured to be leader and previously started, deactivate and send a leadership lost notification.
      void stopLeadership​(org.springframework.context.event.ContextClosedEvent event)
      Auto-stop once application is shutting down.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • LocalLeader

        public LocalLeader​(GenieEventBus genieEventBus,
                   boolean isLeader)
        Constructor.
        Parameters:
        genieEventBus - The spring application event publisher to use to invoke that this node is a leader
        isLeader - Whether this node should be the leader or not. Should only be one in a cluster but not enforced by Genie at this time

    • Method Detail

      • startLeadership

        @EventListener
public void startLeadership​(org.springframework.context.event.ContextRefreshedEvent event)
        Auto-start once application is up and running.
        Parameters:
        event - The Spring Boot application ready event to startup on

      • stopLeadership

        @EventListener
public void stopLeadership​(org.springframework.context.event.ContextClosedEvent event)
        Auto-stop once application is shutting down.
        Parameters:
        event - The application context closing event

      • stop

        public void stop()
        If configured to be leader and previously started, deactivate and send a leadership lost notification. NOOP if not running or if this node is not configured to be leader.

      • start

        public void start()
        If configured to be leader, activate and send a leadership acquired notification. NOOP if already running or if this node is not configured to be leader.

      • isRunning

        public boolean isRunning()
        Whether this module is active.
        Returns:
        true if start() was called.

      • isLeader

        public boolean isLeader()
        Whether local node is leader.
        Returns:
        true if this module is active and the node is configured to be leader