LeaderElectionDriver.Listener (Flink : 2.0-SNAPSHOT API)

All Known Implementing Classes:

DefaultLeaderElectionService

Enclosing interface:

LeaderElectionDriver
```
public static interface LeaderElectionDriver.Listener
```
Listener interface for state changes of the LeaderElectionDriver.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onError(Throwable t)`	Notifies the listener if an error occurred.
`void`	`onGrantLeadership(UUID leaderSessionID)`	Callback that is called once the driver obtains the leadership.
`void`	`onLeaderInformationChange(String componentId, LeaderInformation leaderInformation)`	Notifies the listener about a changed leader information for the given component.
`void`	`onLeaderInformationChange(LeaderInformationRegister leaderInformationRegister)`	Notifies the listener about all currently known leader information.
`void`	`onRevokeLeadership()`	Callback that is called once the driver loses the leadership.

- Method Detail
  - onGrantLeadership
```
void onGrantLeadership(UUID leaderSessionID)
```
    Callback that is called once the driver obtains the leadership.
  - onRevokeLeadership
```
void onRevokeLeadership()
```
    Callback that is called once the driver loses the leadership.
  - onLeaderInformationChange
```
void onLeaderInformationChange(String componentId,
                               LeaderInformation leaderInformation)
```
    Notifies the listener about a changed leader information for the given component.
    
    Parameters:
    
    componentId - identifying the component whose leader information has changed
    
    leaderInformation - new leader information
  - onLeaderInformationChange
```
void onLeaderInformationChange(LeaderInformationRegister leaderInformationRegister)
```
    Notifies the listener about all currently known leader information.
  - onError
```
void onError(Throwable t)
```
    Notifies the listener if an error occurred.