```
public interface TimeoutHandler
```
Asynchronous response suspend time-out handler. Users may utilize this callback interface to provide custom resolution of time-out events.
By default, the runtime generates a WebApplicationException with a HTTP 503 (Service unavailable) error response status code. A custom time-out handler may be set on an asynchronous response instance to provide custom time-out event resolution.

In case of a suspend time-out event, a custom time-out handler takes typically one of the following actions:
- Resumes the suspended asynchronous response using a custom response or a custom exception
- Cancels the response by calling one of the AsyncResponse cancel(...) methods.
- Extends the suspend period of the response by setting a new suspend time-out
If the registered time-out handler does not take any of the actions above, the default time-out event processing continues and the response is resumed with a generated WebApplicationException containing the HTTP 503 status code.

Following example illustrates the use of a custom TimeoutHandler:
```
 public class MyTimeoutHandler implements TimeoutHandler {
     …
     public void handleTimeout(AsyncResponse ar) {
         if (keepSuspended) {
             ar.setTimeout(10, SECONDS);
         } else if (cancel) {
             ar.cancel(retryPeriod);
         } else {
             ar.resume(defaultResponse);
         }
     }
     …
 }

 @Path("/messages/next")
 public class MessagingResource {
     …
     @GET
     public void readMessage(@Suspended AsyncResponse ar) {
         ar.setTimeoutHandler(new MyTimeoutHandler());
         suspended.put(ar);
     }
     …
 }
 
```
Since:

2.0

Author:

Marek Potociar

- Method Summary
  
  Modifier and Type Method Description
  
  void handleTimeout(AsyncResponse asyncResponse)
  Invoked when the suspended asynchronous response is about to time out.

- Method Detail
  - handleTimeout
```
void handleTimeout(AsyncResponse asyncResponse)
```
    Invoked when the suspended asynchronous response is about to time out. Implementing time-out handlers may use the callback method to change the default time-out strategy defined by this specification (see AsyncResponse API documentation).
    A custom time-out handler may decide to either
    
    resume the suspended response using one of it's resume(...) methods,
    
    cancel the suspended response using one of it's cancel(...) methods, or
    
    extend the suspend period by setting a new suspend time-out
    
    In case the time-out handler does not take any of the actions mentioned above, a default time-out strategy is executed by the runtime.
    Parameters:
    
    asyncResponse - suspended asynchronous response that is timing out.

Interface TimeoutHandler

Method Summary

Method Detail

handleTimeout