Using a subclass for an Entity Bean implementation

[juliaac]

Hey, I have a class which implements Entity Bean and has some common functionality.

For example:

public class CommonEntityBean implements EntityBean {
public Long id;
public void setId(Long val) { id = val; }
public Long getId() { return id; }
}

Then I have a few subclasses which extend it:

public class AlphaEntityBean extends CommonEntityBean {
// some stuff specific to AlphaEntityBean
}

Then I have a remote interface to go with it:

public interface Alpha extends EJBObject {
public void setId(Long val) throws RemoteException;
public Long getId() throws RemoteException;
}

When I deploy it says -
Section: 9.2.7
Warning: For each method defined in the remote interface, there must be a matching method in the entity bean's class that has the same name and argument types.

The matching method is there, it's public, it's just in the superclass, and when I paste it into the subclass code it works fine.

So why can't the deployer see public methods in the superclass?

Is this a bug in JBoss or is does the EJB spec say that you can't subclass an EJB implementation class?

Thank you.

[jsk]

Hi Juliaac

Is your super class implementing

ejbCreate()
ejbPostCreate()
ejbRemove()
ejbActivate()
ejbPassivate()
public void ejbLoad()
public void ejbStore()

?

I think they have to be implemented due to the Sun J2EE specification.

Jesper

[tobias]

You need to have the same subclassing schema on the remote interfaces.
Meaning:
public interface CommonEntityBean extends EJBObject
AND
public interface Alpha extends CommonEntityBean

The home interfaces DO NOT use subclassing.
It works this way, I have done and used it. Our system is in production with it.

Tobias