EJB method may not be found in base class (EJB 2 Entity Beans)

[htfv]

Hello World!

I'm porting our application to JBoss AS 7 (7.1.0.Beta1b) and and I receive the following error:

JBAS014337: Could not resolve corresponding ejbCreate for home interface method public abstract com.piConsult.piMedia.ejb.entity.util.EJBBaseEntityLocal com.piConsult.piMedia.ejb.entity.util.EJBBaseEntityLocalHome.create(java.util.Map) throws javax.ejb.CreateException on EJB SmartAccessTileParameterEJB

(Full stack is here: http://pastebin.com/raw.php?i=rZ8i4NN5)

SmartAccessTileParameterBean does not contain ejbCreate method, because it is implemented in base class:

public class SmartAccessTileParameterBean extends EJBBaseEntityBean implements SmartAccessTileParameterBeanPersistence

{

    ...

}

public abstract class EJBBaseEntityBean extends EJBBase implements IBaseEntityBean

{

    @Override

    public Object ejbCreate(Map<String, Object> params) throws CreateException

    {

        ...

    }

}

This code works in AS 4.2.3.GA, and I think it is working in AS 6. Is this a known problem, should I create an issue for this?

Regards

[wolfc]

While technically such an ejbCreate is viable, it is a violation of the spec:

EJB 3.1 FR 8.6.4 ejbCreate<METHOD> Methods

The return type must be the entity bean’s primary key type.

The exception says exactly (in too much detail ) which method is missing.

[htfv]

May be I'm missing something, this is the first time I'm dealing with EJB 2 entity beans, but:

• According to EJB 3.1 FR 8.6.4, ejbCreate<METHOD> Methods:
  • The return type must be the entity bean’s primary key type.
• According to EJB 3.1 FR 8.6.12, Entity Bean's Local Home Interface:
  • The return type for a create<METHOD> method on the local home interface must be the entity bean’s local interface type.
  • Each create method name must match one of the ejbCreate<METHOD> methods defined in the enterprise bean class. The matching ejbCreate<METHOD> method must have the same number and types of its arguments. (Note that the return type is different.)

So, here's the local home interface:

{code}
public interface SmartAccessTileParameterHome extends EJBBaseEntityLocalHome
{
    ...
}
public interface EJBBaseEntityLocalHome extends EJBLocalHome
{
    public EJBBaseEntityLocal create(Map<String, Object> params) throws CreateException;
    ...
}
{code}

Here's the bean class (I changed it to return Integer from ejbCreate):

{code}
public class SmartAccessTileParameterBean extends EJBBaseEntityBean implements SmartAccessTileParameterBeanPersistence
{
   ...
}
public abstract class EJBBaseEntityBean extends EJBBase implements IBaseEntityBean<Integer>
{
    @Override
    public Integer ejbCreate(Map<String, Object> params) throws CreateException
    {
        ...
    }
    ...
}
{code}

And here's the descriptor for complete picture:

{code:xml}
<entity>
    <ejb-name>SmartAccessTileParameterEJB</ejb-name>
    <local-home>com.piConsult.piMedia.ejb.entity.smartaccess.SmartAccessTileParameterHome</local-home>
    <local>com.piConsult.piMedia.ejb.entity.util.EJBBaseEntityLocal</local>
    <ejb-class>com.piConsult.piMedia.ejb.entity.smartaccess.SmartAccessTileParameterBean</ejb-class>
    <persistence-type>Bean</persistence-type>
    <prim-key-class>java.lang.Integer</prim-key-class>
    <reentrant>True</reentrant>
    <security-identity>
        <use-caller-identity />
    </security-identity>
</entity>
{code}

So, to me everything looks right: bean has ejbCreate which returns Integer, local home interface has create which returns local interface. Still get the same error.

[htfv]

BTW, I also tried to put ejbCreate directly in bean, and it worked. The following fixes this particular case:

{code}
public class SmartAccessTileParameterBean extends EJBBaseEntityBean implements SmartAccessTileParameterBeanPersistence
{
    @Override
    public Integer ejbCreate(Map<String, Object> params) throws CreateException
    {
        return super.ejbCreate(params);
    }
    ...
}
{code}

I can't find any statement in spec, which says that ejbCreate may not be defined in base class. Assuming that it worked in past, I believe that it should also work in AS 7.1. Do you know if other containers dis/allow ejbCreate in base classes?

[htfv]

Hello Carlo,

your answer was correct, I just got confused by multiple levels of inheritance and interfaces, it's an old application with lots of spaghetti inside (examples above are actually simplified). I managed to find the error only after debugging through AS 7 deployment code >;)