HOWTO create more then one instance of a contextual bean

[suikast42]

I have a usecase where I need to inject more then one instance (like a stateful session bean in EJB ) of the same beanclass.

For example.

Lets assume I have the class hierachiy shown below.

AbstractController

Controller1 extends AbstractController

So now I inject the  controllers in my repository:

@Stateful

@Startup

// EJB Singleton bean needs to intialize at startup

ControllerRepository{

@Inject @Qualifier1

Controller1 controller1_1;

@Inject @Qualifier1

Controller1 controller1_2;

}

The problem is that in a Session,Conversation or Customscope I speek allway with the same bean instance for  controller1_1 and controller1_2.

I assume the problem or the limitation is in the Context interface.

Everytime if I inject something in my scope then this method of the Context will called

T get(Contextual<T> contextual)

So I have no Information which bean insance should be retrived.

How can I handle this with CDI ?

Thanks in advance.

[mkouba]

This is the limitation of any normal scope (e.g. @RequestScoped, @SessionScoped, @ApplicationScoped, ...). There may be no more than one mapped instance per bean per thread. So if you inject  controller1_1 in fact you inject a proxy that points to the same instance like controller1_2 does. However you can use dependent pseudo-scope. In that case no proxy is injected and also no injected instance is shared between multiple injection points (see also CDI spec 6.4. Dependent pseudo-scope).

[suikast42]

Hi Martin,

unfortunally the dependent scope is not in my focus. Beacuase in my usecase I must communicate with more then one instance of the same bean or  interface. So I had the idea to migrate my EJB stateful beans to CDI Sessionscoped bean for communicate over cdi events. But the dependent scope create for every event a new instance.

I understood the cdi way to create instances wrong. I'm little bir smarter know . I think .

If I don't understand it wrong then this is in focus of CDI 1.1 . Right ??

[mkouba]

Hi Sueleyman,

yes, I guess CDI-103 is the feature request you should be watching

[suikast42]

Martin Kouba schrieb:

Hi Sueleyman,

yes, I guess CDI-103 is the feature request you should be watching

So then let's wait