ExternalResourceDriver (Flink : Core 1.20.2-cp1 API)

```
@PublicEvolving
public interface ExternalResourceDriver
```
Driver which takes the responsibility to manage and provide the information of external resource.
Drivers that should be instantiated via a ExternalResourceDriverFactory.
TaskExecutor will retrieve the ExternalResourceInfo set of the external resource from the drivers.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Set<? extends ExternalResourceInfo>`	`retrieveResourceInfo(long amount)`	Retrieve the information of the external resources according to the amount.

- Method Detail
  - retrieveResourceInfo
```
Set<? extends ExternalResourceInfo> retrieveResourceInfo(long amount)
                                                  throws Exception
```
    Retrieve the information of the external resources according to the amount.
    
    Parameters:
    
    amount - of the required external resources
    
    Returns:
    
    information set of the required external resources
    
    Throws:
    
    Exception - if there is something wrong during retrieving