EJB3无状态会话Bean是否允许继承？

Question

Suppose I have a stateless bean:

@Stateless(name = "fooBean")
@LocalBean
public class Foo {
...
}

I want to create a mock for testing (with CDI)

@Alternative @Specializes
public class FooMock extends Foo {
...
}

I register the mock in beans.xml , and when I run it with OpenEJB, I get the following exception:

...
Caused by: javax.naming.NameAlreadyBoundException:
openejb/Deployment/fooBean/com.company.Foo!LocalBeanHome

It seems to me that the container creates an interface for Foo because of @LocalBean which is now implemented by FooMock , too. OpenEJB tries to bind the two classes with the with same name of same generated interface, which is not possible.

Of course, if I comment out @Stateless and @LocalBean in Foo class, it works fine.

Any idea or suggestion to solve this?

Answer 1

Rather do something like:

@Local
public interface Foo {
...
}

@Stateless
public class FooBean implements Foo {
...
}

Then make your mock.

@Alternative
@Specializes
public class FooMock implements Foo {
...
}

However I recommend you take a look at Arquillian it will make your testing so much easier without the need for @Alternative and special beans.xml entries for tests.