Does JBoss behave so much different from specs?

[Mike Rocks]

Hello Ranchers,

I am going through Enthuwares questions and I want to test the given answers. There is a question on transaction-handling like following:

Bean A with transaction attributes of "Supports" for all its methods. Bean B with transaction attributes of "Never" for all its methods. A client having a transaction context calls a method mA() on bean A, which in turns calls a method mB() on Bean B.
 
Right answers:
-> The client's transaction will be marked for roll back.
-> The client will get a javax.ejb.EJBTransactionRolledbackException
 
Explanation:
Since mB()'s transaction attribute is Never, it means that its caller must NOT have a transaction context. In this case, its caller is mA(). Since its transaction attribute is Supports, and the client has a transaction context, it executes within the client's transaction context. Therefore, when it calls B's method, it will get a javax.ejb.EJBException, which is a system exception. This means that bean A method encounters a system exception and thus the bean A instance will be discarded. There is no impact on bean B instance.
Further, since though A's method encounters a system exception, its transaction, which is same as that of the client, will be marked for rollback by the container. Therefore, option 1 is correct.

I created an example but JBoss doesn't behave like mentioned above. The A-Bean doesn't get an EJBException (it can't be caught) but it gets an IllegalStateException.

Here is my code for the client-class:

@Stateful
public class RemoteClientBean implements RemoteClient {

@EJB A myABean;

public void requiresSupportsNever() {
 
    myABean.mA();
}
}

The code for the ABean-class. Here the IllegalStateException raises instead of the EJBExceptio:

@Stateless
public class ABean implements A{

@EJB B myBBean;

@TransactionAttribute(TransactionAttributeType.SUPPORTS)
public void mA() {

try {
myBBean.mB();
} catch(EJBException ee) {
                        //THE EXCEPTION ISN'T CAUGHT
ee.printStackTrace();
}
}
 
}

And the code for the BBean-class:

@Stateless
public class BBean implements B{
 
@TransactionAttribute(TransactionAttributeType.NEVER)
public void mB() {

}
}

Why does the IllegalStateException raise in the ABean-class instead of the EJBException?