Servlets 3.0 AsyncContext

[Mahtab Alam]

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;

@WebServlet(urlPatterns = "/foo/*", name="NullServlet",asyncSupported=true)
public class NullServlet extends HttpServlet {
    public void doGet(HttpServletRequest req, HttpServletResponse resp) {
        System.out.println("I'm inside!");

        final AsyncContext ac = req.startAsync();

        ac.start(new Runnable() {
            public void run() {
                System.out.println("*** I'm an async thread!");
                ac.complete();
            }
        });

        System.out.println("I'm leaving! Bye!");
    }
}

So is it guaranteed that output will always be

I'm inside!
I'm leaving! Bye!
*** I'm an async thread!

So that new thread that we are starting will always execute after the current Servlet Thread have completed its execution.
So it can not be in the below order

I'm inside!
*** I'm an async thread!
I'm leaving! Bye!