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javadependency-injectionejbcdiweld

Is it possible to inject EJB implementation and not its interface using CDI?

My configuration is: Wildfly 8.2.0, Weld

Is it possible to inject in bean and not in its interface in CDI ?

@Stateless
class Bean implements IBean {
...
}    

interface IBean {
...
}

@SessionScoped
class Scoped {
   @Inject
   Bean bean; //Fail

   @Inject
   IBean iBean; //OK
}

EDIT:

More Info in my previous question: Stateless EJB implements interface injection failed

Solution

  • Yes you can, but as EJB inject the business view the only business view you are exposing is the @Local view which is the default when you implement an interface (IBean in your case is a local business interface). So, if you want to inject the bean itself, you need to tell the container that you are using the no-interface view.

    In your example, if you still want to implement your interface and inject Bean you should use the @LocalBean annotation which means that the bean exposes a no-interface view:

    @Stateless
@LocalBean // <-- no-interface view
class Bean implements IBean {
...
}  

interface IBean {
....
}

@SessionScoped
class Scoped {
   @Inject
   Bean bean; //Should be OK
}

    Or, If you don't want to implement any interface, then the bean defines by default a No-Interface view:

    @Stateless
class Bean {
...
}  

@SessionScoped
class Scoped {
   @Inject
   Bean bean; //OK
}

    See also: