Asynchronous processing

JAXRS supports asynchronous processing in both server and client APIs:

• Server API: Asynchronous processing allows the resource method to inform the JAXRS runtime that a response is not ready yet and will be provided at a future time. This is done by temporarily suspending the connection and then resuming it once the response becomes available. For a resource method to utilize async processing it must inject an AsyncResponse instance using the special @Suspended annotation. The resource method code may perform a long-running operation as desired, and then finally publish the response using the resume method of the AsyncResponse instance. AsyncResponse also allows for specifying timeouts and callbacks:

    @GET public void timeConsumingActivity(
        @Suspended final AsyncResponse ar) {    
            executor.execute(() -> {
            //Executor to run job in background
            longRunningCode();
            ar.resume("async response here");
        });...