@Async in a spring controller method

Question

Spring Controller REST methods are by default Asynchronized.

Then what is the purpose of @Async annotation?

@RequestMapping(value = "/status/{id}", method = RequestMethod.GET)
@Async
public Future<Status> getStatus(@PathVariable("id") String id) {    
    return new AsyncResult<Status>(status);    
}

Also what is the role of Future interface and AsyncResult class?

score 3 · Answer 1 · edited May 23 '17 at 12:15

3

@Async : Can be used for fire-and-forget scenarios, such as sending an email, kicking off a database job. Caller immediately get the response, while a background job completes processing.

what is the role of Future interface and AsyncResult class?

Future represents the result of an asynchronous computation.

AsyncResult is an implementation for Future, wraps the return type of asynchronous execution.

As per this blog, Callable is the appropriate return type for controller methods.

ref Async vs callable controllers

edited May 23 '17 at 12:15

Community

1
1

answered Dec 30 '15 at 07:55

Lovababu Padala

2,415
2
20
28

So @Async will do what Callable and DeferredResult do, which is releasing the container thread and processing the long running task asynchronously in another thread right? – Harshana Dec 30 '15 at 08:09
Yes, that is the behavior of @Async methods. – Lovababu Padala Dec 30 '15 at 08:19

@Async in a spring controller method

1 Answers1

Linked