Hi,

i follow the documentation for the messaging service but i've an error when i'm using it :

Here the example used for the test.

In my entrypoint, i'm just adding a button to deliver a message "hi there" via a service MyEchoService to all users connected

But when i click it , i get the following error in browser console:

Exception caught: no subscribers to deliver to for subject: MyEchoService.

-CLIENT-SIDE-------------------------------------------------------------------------------------------------------------------------

<!- click to the button to call the myechoservice, and my echo service sends message to all users-->
 verticalPanel.add(new UiButton("call myechoservice", new ClickHandler() {
      
      @Override
      public void onClick(ClickEvent event) {
        MessageBuilder.createMessage().toSubject("MyEchoService") // (1)
            .signalling() // (2)
            .noErrorHandling() // (3)
            .sendNowWith(ErraiBus.get()); // (4)
        
      }
    }));

<!-- Listen the subject -->
  ErraiBus.get().subscribe("test", new MessageCallback() {
      
      @Override
      public void callback(Message message) {
        String messageText = message.get(String.class, "text");
        Window.alert(messageText);
      }
    });

-SERVER-SIDE-------------------------------------------------------------------------------------------------------------------------

@Service
@WebServlet("/MyEchoService")
public class MyEchoService extends HttpServlet implements MessageCallback {
  
  private MessageBus bus;
  
  @Inject
  public MyEchoService(MessageBus messageBus) {
    this.bus = messageBus;
  }
  
  @Override
  public void callback(Message message) {
    test();
  }
  
  public void test() {
    MessageBuilder.createMessage().toSubject("test").signalling().with("text", "Hi There").noErrorHandling().sendGlobalWith(bus);
  }
  
  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    test();
  }
  
}

I'm using the last version of wildfly. When i deploy i see the discoverd "myechoservice"

10:47:49,247 INFO  [org.jboss.errai.cdi.server.CDIExtensionPoints] (MSC service thread 1-15) discovered errai service: [BackedAnnotatedType] public @Service @WebServlet class com.inovelan.cloud.portailps.server.MyEchoService

BUT

If a call the servlet via doGet() of the servlet /MyEchoService The window.alert works !

SO. Sending message from the client to the server doesn't work but sending message from server to client work.

I've searched what the problem many days but i don't find the solution.

Any Idea ?