Service problem

[zime]

I'm evaluating Errai, so I'm creating an application to test several aspect.

In this application I used both CDI, messaging and RPC as described in docs.

CDI and RPC works correctly, but i have some problema with messagging.

I create a service like that:

@Service
public class MyService implements MessageCallback {


  public void callback(Message message) {
  ...
  }
}

And i have this configuration in web.xml :

<init-param>
   <param-name> service-locator </param-name >
   <param-value> org.jboss.errai.cdi.server.CDIServiceLocator </param-value >
</init-param> 

Calling from client with MessageBuilder is ok.

Now i want, from callback, send a broadcast message to all client so I added the following code

@Service
public class MyService implements MessageCallback {

  private RequestDispatcher dispatcher;

   @Inject
   public MyService(RequestDispatcher dispatcher) {
     this.dispatcher = dispatcher;
   }
   
  public void callback(Message message) {
  
   ... 

 MessageBuilder.createMessage()
      .toSubject("BroadcastReceiver")
      .signalling()     
      .withValue(res)  
      .noErrorHandling()        
      .sendNowWith(dispatcher);    
  }

When i call the service, i receive thsi exception:

no subscribers to deliver to for subject: MyService

org.jboss.errai.bus.client.api.base.NoSubscribersToDeliverTo: no subscribers to deliver to for subject: MyService

If I add this configuration to web.xml

        <init-param>
            <param-name> auto-discover-services </param-name >
            <param-value> true</param-value >
        </init-param>

no exception is thrown, but message is deliverde twice, and so the method is executed twice.

What's wrong?

[mbarkley]

Hi Simone,

What version of Errai are you using? The CDIServiceLocator isn't in 3.0 or 2.4 . So if you're using one of those versions of Errai and you're using an EE6 container on the server, then just get rid of the service-locator and auto-discover-services parameters from your web.xml and everything should work.

Cheers.

[zime]

I use 2.4.3 version, in dev mode (so with jetty) and if i remove both parameter, i get the error i posted before: no subscribers to deliver to for subject:

Just to try, i made a package to deploy under Jboss7 but i get the same problem.

[mbarkley]

Hi Simone,

A few other things you should check:

• Do you have a beans.xml in your WEB-INF/ ?
• Do you have an ErraiApp.properties (even if it's empty) in the default package of your project?

For reference, here is our errai-tutorial project. It has a beans.xml here, and an ErraiApp.properties here.

[zime]

I have bean.xml and also ErraiApp.properties .

I think problem is in injection, if i remove this code:

@Inject 

   public MyService(RequestDispatcher dispatcher) { 

     this.dispatcher = dispatcher; 

}

i can call service, but i don't have dispatcher to send message to alla client.