ResourceEventHandler (Flink : 2.0-SNAPSHOT API)

All Known Implementing Classes:

ActiveResourceManager
```
public interface ResourceEventHandler<WorkerType extends ResourceIDRetrievable>
```
Callback interfaces for handling resource events from external resource managers.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onError(Throwable exception)`	Notifies that an error has occurred that the process cannot proceed.
`void`	`onPreviousAttemptWorkersRecovered(Collection<WorkerType> recoveredWorkers)`	Notifies that workers of previous attempt have been recovered from the external resource manager.
`void`	`onWorkerTerminated(ResourceID resourceId, String diagnostics)`	Notifies that the worker has been terminated.

- Method Detail
  - onPreviousAttemptWorkersRecovered
```
void onPreviousAttemptWorkersRecovered(Collection<WorkerType> recoveredWorkers)
```
    Notifies that workers of previous attempt have been recovered from the external resource manager.
    
    Parameters:
    
    recoveredWorkers - Collection of worker nodes, in the deployment specific type.
  - onWorkerTerminated
```
void onWorkerTerminated(ResourceID resourceId,
                        String diagnostics)
```
    Notifies that the worker has been terminated.
    See also ResourceManagerDriver.requestResource(org.apache.flink.runtime.clusterframework.TaskExecutorProcessSpec).
    
    Parameters:
    
    resourceId - Identifier of the terminated worker.
    
    diagnostics - Diagnostic message about the worker termination.
  - onError
```
void onError(Throwable exception)
```
    Notifies that an error has occurred that the process cannot proceed.
    
    Parameters:
    
    exception - Exception that describes the error.