7 Replies Latest reply on Oct 2, 2014 7:02 AM by Francesco Apollonio

    @Inject doesn't work, @EJB works

    Francesco Apollonio Newbie

      Hi all,

       

      I've a problem on mine application related to the @Inject method.

      I've a local interface (called LocalInterface) that is mostly implemented by an Abstract class (called MyAbstractBean).

       

      interface LocalInterface<? extends Something> {

           MyObject method1();

      }

       

      abstract class MyAbstractBean implements LocalInterface {

       

           abstract MyObject method1()

           {

       

                // ... do some stuff

                method2();

               

           }

       

           abstract MyObject2 method2();

       

      }

       

      This interface uses generics and it's extended by another one (ActualLocalInterface) which has an implementation (ActualLocalInterfaceBean) which extends MyAbstractBean, implementing the remaining abstract methods.

       

      @Local

      interface ActualLocalInterface extends LocalInterface<Something>

      { }

       

      @Stateless

      class ActualLocalInterfaceBean implements ActualLocalInterface extends MyAbstractBean

      {

       

           MyObject2 method2()

           {

                // ... do something

           }

       

      }

       

      In another interface (RemoteInterface) implementation (RemoteInterfaceBean) I inject with @Inject the ActualLocalInterface and, in one of the methods, I calls one of the method implemented into MyAbstractBean.

       

      interface RemoteInterface

      {

          void remoteMethod1();

      }

       

      class RemoteInterfaceBean

      {

       

           @Inject

           ActualLocalInterface myLocalBean;


           void remoteMethod1()

           {


                myLocalBean.method1();


           }

       

      }

       

      Sometimes the method invocation fails giving me this exception:

       

      Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class

              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

              at java.lang.reflect.Method.invoke(Method.java:606)

              at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:401)


      when the remote interface's method invoke the MyAbstractBean method. I noticed that stopping and restarting Jboss the behaviour changes and it may start to work. I add also that the application works well on Jboss6 and Jboss7.


      I've found that changing the injection method (from @Inject -> @EJB) the application starts to work well.


      Do you know why? Is it a bug on wildfly?


      Thank you,


      Francesco