Package org.apache.cxf.annotations

Annotation Type UseAsyncMethod

@Documented
@Retention(RUNTIME)
@Target(METHOD)
@Inherited
public @interface UseAsyncMethod

Instructs the runtime to dispatch using the async method on service if continuations are available. This only applies to the JAX-WS frontend at this time. Instead of calling the "X methodName(Y, Z...) method, it will call the "Future<?> methodName(Y, Z, ... AsyncHandler)" method passing in an AsyncHandler that you will need to call when the response is ready. An example would be:

 public Future<?> greetMeAsync(final String requestType,
                               final AsyncHandler asyncHandler) {
     final ServerAsyncResponse r = new ServerAsyncResponse<>();
     new Thread() {
         public void run() {
            //do some work on a backgound thread to generate the response...
            GreetMeResponse resp = new GreetMeResponse();
            resp.setResponseType("Hello " + requestType);
            r.set(resp);
            asyncHandler.handleResponse(r);
         }
    } .start();
    return r;
 }
 

The use of the org.apache.cxf.jaxws.ServerAsyncResponse class for the response as shown above can simplify things and is recommended.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element	Description
boolean	always	By default, if continuations are not available, it will use the non-async method.

Element Details

always

boolean always

By default, if continuations are not available, it will use the non-async method. If you ALWAYS want the async method called, set this to true. However, that can cause threads to block.

Default:

false