Question about @Specializes

[slaweksa]

Hello,

I'm playing with @Scpecializes annotation. I have problem with events  - I have two beans:

public class TestBean {

        public void handleEvent(@Observes Date date) {
                System.out.println("TestBean - handle event - " + date);
        }
}

@Specializes
public class SpecBean extends TestBean {

        public void handleEvent(@Observes Date date) {
                System.out.println("SpecBean - handle event - " + date);
        }
}

I fire event:

        @Inject Event<Date> event;
        private void runTest1() {
                event.fire(new Date());

        }

and I get two notification in log informing me that event was handled:

INFO: SpecBean - handle event - Wed Jun 16 16:33:25 EDT 2010
INFO: SpecBean - handle event - Wed Jun 16 16:33:25 EDT 2010

It says that event was handled by specialized bean (it's ok) but why two times? Am I doing something wrong?
I run it on Glassfish v 3.0.1

Greetings and thanks in advance.

Slawomir

[alin.heyoulin.qq.com]

@Specializes
public class SpecBean extends TestBean {
        
        @Override //??????
        public void handleEvent(@Observes Date date) {
                System.out.println(SpecBean - handle event - + date);
        }
}

[slaweksa]

Thank you for your answer. I changed implementation of SpecBean:

@Specializes
public class SpecBean extends TestBean {

     @Override //added
     public void handleEvent(@Observes Date date) {
          System.out.println("SpecBean - handle event - " + date);
     }
}

But it didn't change the behavior. I am still getting two notifications in log.

greetings

Slawomir

[alin.heyoulin.qq.com]

Goode question. You have two bean Observe this event. TestBean and SpecBean. You can't extends  TestBean. Just

@Specializes
public class SpecBean  {

        public void handleEvent(@Observes Date date) {
                System.out.println(SpecBean - handle event - + date);
        }
}
or veto TestBean or make TestBean as interface.

[slaweksa]

Thanks for help.

I’ve found my mistake SpecBean should be also annotated with @Alternative annotation. After this change event is handled only one time.