[undertow-dev] what I do wrong?

[Mikhail Tyamin]

Hello guys,

could you help me a little bit with Undertow?

I follow all instructions in Undertown's poor documentation. So here is the
class :

public class HelloWorldServer {

    public static void main(String... args) {
        Undertow server = Undertow.builder()
                .addHttpListener(8080, "localhost")
                .setHandler(new HttpHandler() {
                    @Override
                    public void handleRequest(final HttpServerExchange
exchange) throws Exception {
                        if (exchange.isInIoThread()) {
                            System.out.println("Thread #" +
Thread.currentThread().getName() + " is I/O : handle this");
                            exchange.dispatch(this);
                            return;
                        }

                        //[1]
                        System.out.println("Thread #" +
Thread.currentThread().getName() + " Start waiting");
                        Thread.sleep(15000);
                        System.out.println("Thread #" +
Thread.currentThread().getName() + " Finish waiting");

                        System.out.println();


exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
                        exchange.getResponseSender().send("Hello world from
thread " + Thread.currentThread().getId());
                        //[2]
                    }
                }).build();

        server.start();
    }
}


When I start it and make three http get request simultaneously I can see
this output in console :

Thread #XNIO-1 I/O-1 is I/O : handle this
Thread #XNIO-1 task-1 Start waiting
Thread #XNIO-1 task-1 Finish waiting

Thread #XNIO-1 I/O-1 is I/O : handle this
Thread #XNIO-1 task-2 Start waiting
Thread #XNIO-1 task-2 Finish waiting

Thread #XNIO-1 I/O-1 is I/O : handle this
Thread #XNIO-1 task-3 Start waiting
Thread #XNIO-1 task-3 Finish waiting


I think that code beetween //[1] and //[2] should perform in separate
thread (and as we can see from the console it really does), but why the
main I/O thread are waiting and does not handle other requests?

So if my code is correct than it means that Undertow could handle one
request in time...

What I do wrong?

Best,
Mikhail
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