All the magic of this recipe relies on the AsyncService class, so we will focus on that.

First, we ask the server for an instance of an executor:

Resource(name = "LocalManagedScheduledExecutorService")
private ManagedScheduledExecutorService executor;

However, we are not asking for just any executor—we want an executor that's specific to scheduling:

ScheduledFuture<User> result = executor.schedule(new AsyncTask(), 
5, TimeUnit.SECONDS);

So, we schedule our task to be executed in 5 seconds. Note that we also don't use a regular Future instance, but rather ScheduledFuture:

while (!result.isDone()) {
  try {
        TimeUnit.SECONDS.sleep(1);
      } catch (InterruptedException ex) {
        System.err.println(ex.getMessage());
    }
 }

The following code snippet shows you how we write the results to the response:

response.resume(Response.ok(result.get()).build());