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

Class LocalLeader

java.lang.Object
com.netflix.genie.web.tasks.leader.LocalLeader
@ThreadSafe public class LocalLeader extends 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

    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 Details

    • 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 Details

    • 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