com.neovisionaries.zookeeper

Interface LeaderElection.Listener

All Known Implementing Classes:

LeaderElection.Adapter

Enclosing class:

LeaderElection

public static interface LeaderElection.Listener

The listener to receive leader election events.

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.

Method Detail

onWin

void onWin(LeaderElection election)

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

Parameters:

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

onLose

void onLose(LeaderElection election)

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

Parameters:

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

onVacant

void onVacant(LeaderElection election)

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

Parameters:

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

onFinish

void onFinish(LeaderElection election)

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().

Parameters:

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

onStateChanged

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

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

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.

Since:

1.1