AsyncFutureListener (venice 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 AsyncFutureListener<T>
```
An interface (lambda) which is fired upon completion of an AsyncFuture.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`operationComplete(AsyncFuture<T> future)`	Invoked when the operation associated with the `AsyncFuture` has been completed.

- Method Detail
  - operationComplete
```
void operationComplete(AsyncFuture<T> future)
                throws java.lang.Exception
```
    Invoked when the operation associated with the AsyncFuture has been completed.
    
    Parameters:
    
    future - the source AsyncFuture which called this callback
    
    Throws:
    
    java.lang.Exception