Brain power pg 269 in Head First EJB

[Sridevi Sangaiah]

what does "Delete all Customers previously declared 'inactive'"
mean?Where(either in component or home interface) should we provide the necessary operations to achieve the above and how?

[Philippe Maquet]

Hi Sridevi,
Welcome to JavaRanch !

what does "Delete all Customers previously declared 'inactive'" mean?

I guess that 'inactive' is a business rule like 'customers with no orders' for instance.

Where(either in component or home interface) should we provide the necessary operations to achieve the above

In the home interface, because that method will not - by definition - be related to any specific bean instance.

and how?

Mmh... You are going far beyond the scope of the brain power of p. 269 !
OK, I was kidding.
Your question is interesting, I am unsure that my solution below is correct, but I'll try to do as an exercise :
* In CustomerHome *

public void deleteAllInactive() throws RemoteException, RemoveException;

* In CustomerBean *

public abstract Collection ejbSelectAllInactive();
public void ejbHomeDeleteAllInactive() throws RemoveException {
    Collection c = ejbSelectAllInactive();
    for (Iterator it = c.iterator(); it.hasNext(); ) {
        Customer cus = (Customer) it.next();
        try {
            cus.remove();
        } catch (RemoveException e) {
            entityCtx.setRollbackOnly();
            throw e;
        }
    }
}

* In the deployment descriptor *

<query>
    <description>Selects all inactive customers</description>
    <query-method>
        <method-name>selectAllInactive</method-name>
    </query-method>
    <ejb-ql>SELECT OBJECT(c) FROM Customer c WHERE c.Orders IS EMPTY</ejb-ql>
</query>

Is this correct ?
Best,
Phil.

[Sridevi Sangaiah]

Hi Philip,
You have really given a big picture of the solution to my question.I have got it, but yet to try out.I guess it should be correct upto my knowledge(though little i have).Thanks Philip.

[Philippe Maquet]

Was it correct ?
Best,
Phil.