EmptyQueueListener (storm-crawler-core 2.10 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface EmptyQueueListener
```
Used by URLBuffer to inform the spouts when a queue has no more URLs in it

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void emptyQueue(String queueName)

- Method Detail
  - emptyQueue
```
void emptyQueue(String queueName)
```