com.neovisionaries.zookeeper

Class LeaderElection.Adapter

java.lang.Object

com.neovisionaries.zookeeper.LeaderElection.Adapter

All Implemented Interfaces:

LeaderElection.Listener

Enclosing class:

LeaderElection

public static class LeaderElection.Adapter
extends Object
implements LeaderElection.Listener

An empty implementation of LeaderElection.Listener.

Since:

1.1

Constructor Summary

Constructors

Constructor and Description
Adapter()

Method Summary

Modifier and Type	Method and Description
void	onFinish(LeaderElection election) Called when it is detected that callback should not be called any more.
void	onLose(LeaderElection election) Called when it is detected that another candidate is the leader.
void	onStateChanged(LeaderElection election, LeaderElection.State oldState, LeaderElection.State newState) Called when the state of the leader election changed.
void	onVacant(LeaderElection election) Called when it is detected that a leader does not exist.
void	onWin(LeaderElection election) Called when this candidate won a leader election.

Methods inherited from class java.lang.Object

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

Constructor Detail

Adapter

public Adapter()

Method Detail

onWin

public void onWin(LeaderElection election)

Description copied from interface: LeaderElection.Listener

Called when this candidate won a leader election. This callback method is called after onStateChanged().

Specified by:

onWin in interface LeaderElection.Listener

Parameters:

election - The LeaderElection instance which this listener is associated with.

onLose

public void onLose(LeaderElection election)

Description copied from interface: LeaderElection.Listener

Called when it is detected that another candidate is the leader. This callback method is called after onStateChanged().

Specified by:

onLose in interface LeaderElection.Listener

Parameters:

election - The LeaderElection instance which this listener is associated with.

onVacant

public void onVacant(LeaderElection election)

Description copied from interface: LeaderElection.Listener

Called when it is detected that a leader does not exist. This callback method is called after onStateChanged().

Specified by:

onVacant in interface LeaderElection.Listener

Parameters:

election - The LeaderElection instance which this listener is associated with.

onFinish

public void onFinish(LeaderElection election)

Description copied from interface: LeaderElection.Listener

Called when it is detected that callback should not be called any more. Note that this method may not be called so soon and may not be called at all. This callback method is called, if called, after onStateChanged().

Specified by:

onFinish in interface LeaderElection.Listener

Parameters:

election - The LeaderElection instance which this listener is associated with.

onStateChanged

public void onStateChanged(LeaderElection election,
                           LeaderElection.State oldState,
                           LeaderElection.State newState)

Description copied from interface: LeaderElection.Listener

Called when the state of the leader election changed. This callback method is called before other onXxx methods (onWin(), onLose(), onVacant() and onFinish()).

Specified by:

onStateChanged in interface LeaderElection.Listener

Parameters:

election - The LeaderElection instance which this listener is associated with.

oldState - The previous state before the change.

newState - The new state after the change.