4 Replies Latest reply on Feb 6, 2012 1:24 PM by gvagenas

How to find methods that @Observes for specific events

gvagenas Jan 28, 2012 8:40 AM

Hi guys,

Is there an easy way to find all the methods that observe for a specific event?
CDI event producing/consuming mechanism is great to have a decoupled and really efficient design, but its getting hard when someone is trying to go through the code and debug it when he reach a fire(event) method, particularly when its not your code (sometimes happens with your code also ;-) ).

Thanks
George

1. Re: How to find methods that @Observes for specific events

diegocoronel Jan 29, 2012 10:19 AM (in response to gvagenas)

its easy to find it with JBoss Tools...
Actions
2. Re: How to find methods that @Observes for specific events

gvagenas Jan 29, 2012 12:50 PM (in response to gvagenas)

Any idea how to do it with out JBoss Tools ?

Thanks
Actions
3. Re: How to find methods that @Observes for specific events

milenkovic.m Feb 5, 2012 6:35 PM (in response to gvagenas)
You may use method "resolveObserverMethods" provided by BeanManager.
let say that you have a method that observes for a SimpleEvent without any qualifiers (just to simplify a bit)

inject the bean manager
call manager.resolveObserverMethods ( new SimpleEvent() ) and it shall return a set of all methods that observe for a SimpleEvent

public class TestClass { @Inject BeanManager manager; public void resolveObservers(){ this.manager.resolveObserverMethods ( new SimpleEvent() ); }
}

public class HasAnObserver {
public void simpleObserver(@Observes SimpleEvent event){ }
}

if you need a qualifier you should specify it after the first parameter
Actions
4. Re: How to find methods that @Observes for specific events

gvagenas Feb 6, 2012 1:24 PM (in response to milenkovic.m)

Thanks Marko.
Actions

Go to original post