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Posted to users@tomee.apache.org by Alexander Wagner <al...@inside-m2m.de> on 2014/12/03 15:36:33 UTC

Inject a EJB into MBean

Hello TomEE-Comunity,

could someone give me an explanation why it is possible to inject by 
@Inject but not by @EJB in a MBean?

@javax.management.MBean
@ApplicationScoped
class MyMBean  {
	@Inject MyService myserviceA;
	@EJB    MyService myserviceB;
	
	@ManagedOperation
	public void test() {
		System.out.println(myserviceA); // prints the proxy
		System.out.println(myserviceB); // prints null
	}
}

@Stateless class MyService {}

My background is that I can use @Inject as long as my Stateless does not 
implements an interface:

@Stateless class MyService implements MyInterface {}

Maybe my understanding of CDI is here not deep enough, but for now I use 
normally @EJB e.g. if the EJB's implements an interface because with 
@Inject the EJB can not be resolved anymore.

So for now I can not use the MyService with an interface in a MBean. 
Does someone has a tip what I am doing wrong?

Best Regards
Alexander Wagner

Re: Inject a EJB into MBean

Posted by Alexander Wagner <al...@inside-m2m.de>.
Yesterday I missed to write to the mailing list, so Romain answered me 
also directly. I think its ok that I publish his answer :-D

Am 03.12.2014 um 15:59 schrieb Alexander Wagner:
 > I Am not sure what do you mean with "@Inject should work for EJB once a
 > beans.xml added". @Inject works already but not in cases where my EJB
 > for example implements an interface, than the ejb could not resolved
 > anymore and I don't get the trick that it is resolvable also over CDI
 > (@Inject).

Am 03.12.2014 um 16:04 schrieb Romain Manni-Bucau:
 > @Inject EjbApi ejb; works with CDI. Just ensure to inject using the
 > EJB "api" (ie interface for you) and not implementation

Am 03.12.2014 um 16:09 schrieb Alexander Wagner:
 > Oh sry I misssed to answer to the mailing list!
 >
 > ah ok so in my case I resolved it by adding @LocalBean because I needed
 > the impl and not only the interface...

So thank you for your help Romain!

Am 03.12.2014 um 15:46 schrieb Romain Manni-Bucau:
> Before we don't support it AFAIK, we support CDI integration but not
> EJB one. Could be added but @Inject should work for EJB once a
> beans.xml added
>
>
> Romain Manni-Bucau
> @rmannibucau
> http://www.tomitribe.com
> http://rmannibucau.wordpress.com
> https://github.com/rmannibucau
>
>
> 2014-12-03 15:36 GMT+01:00 Alexander Wagner <al...@inside-m2m.de>:
>> Hello TomEE-Comunity,
>>
>> could someone give me an explanation why it is possible to inject by @Inject
>> but not by @EJB in a MBean?
>>
>> @javax.management.MBean
>> @ApplicationScoped
>> class MyMBean  {
>>          @Inject MyService myserviceA;
>>          @EJB    MyService myserviceB;
>>
>>          @ManagedOperation
>>          public void test() {
>>                  System.out.println(myserviceA); // prints the proxy
>>                  System.out.println(myserviceB); // prints null
>>          }
>> }
>>
>> @Stateless class MyService {}
>>
>> My background is that I can use @Inject as long as my Stateless does not
>> implements an interface:
>>
>> @Stateless class MyService implements MyInterface {}
>>
>> Maybe my understanding of CDI is here not deep enough, but for now I use
>> normally @EJB e.g. if the EJB's implements an interface because with @Inject
>> the EJB can not be resolved anymore.
>>
>> So for now I can not use the MyService with an interface in a MBean. Does
>> someone has a tip what I am doing wrong?
>>
>> Best Regards
>> Alexander Wagner
>>

Re: Inject a EJB into MBean

Posted by Romain Manni-Bucau <rm...@gmail.com>.
Before we don't support it AFAIK, we support CDI integration but not
EJB one. Could be added but @Inject should work for EJB once a
beans.xml added


Romain Manni-Bucau
@rmannibucau
http://www.tomitribe.com
http://rmannibucau.wordpress.com
https://github.com/rmannibucau


2014-12-03 15:36 GMT+01:00 Alexander Wagner <al...@inside-m2m.de>:
> Hello TomEE-Comunity,
>
> could someone give me an explanation why it is possible to inject by @Inject
> but not by @EJB in a MBean?
>
> @javax.management.MBean
> @ApplicationScoped
> class MyMBean  {
>         @Inject MyService myserviceA;
>         @EJB    MyService myserviceB;
>
>         @ManagedOperation
>         public void test() {
>                 System.out.println(myserviceA); // prints the proxy
>                 System.out.println(myserviceB); // prints null
>         }
> }
>
> @Stateless class MyService {}
>
> My background is that I can use @Inject as long as my Stateless does not
> implements an interface:
>
> @Stateless class MyService implements MyInterface {}
>
> Maybe my understanding of CDI is here not deep enough, but for now I use
> normally @EJB e.g. if the EJB's implements an interface because with @Inject
> the EJB can not be resolved anymore.
>
> So for now I can not use the MyService with an interface in a MBean. Does
> someone has a tip what I am doing wrong?
>
> Best Regards
> Alexander Wagner
>