Hi,
I have never use CMP but wouldn't a work around be to implement the
ejbCreate(empno) method as a call to ejbCreate(empno, null, null). Like
this:
public EmpPK ejbCreate(String empno) throws RemoteException {
return ejbCreate(empno, null, null);
}
And, hence the fields will be set to null.
/Kaj
> -----Ursprungligt meddelande-----
> Fr�n: Srinivas Ganapur [mailto:[EMAIL PROTECTED]]
> Skickat: Monday, June 19, 2000 4:31 PM
> Till: [EMAIL PROTECTED]
> �mne: Is it a BUG in EJB spec's !!
>
>
> Hello everybody,
>
> As per the EJB specs when ever a Bean instance is not
> associated with any
> EJB Object or if it gets passivated, its bean instance goes into the
> Instance Free Pool. And each instance is assigned to EJB
> Object as per
> requirement , by the container. If new EJB Object is
> created, the old
> values(I call it dirty data ! ) of bean instance are assigned
> or carried
> onto the next EJB Object, this seems to be a problem !!
>
> For details see below scenario :
>
> Consider a Entity Bean "EmployeeBean" with CMP fields :
> empno(NOT NULL), empName(NULL allowed), salary(NULL allowed);
> Have two create methods :
> create(empno,empName,salary); create(empno);
>
> Data in table : (100, myname,1000);
>
> SCENARIO FIRST :
> After the deployement, I run my client for the first time which does :
> 1. findByPrimaryKey(new EmployeePK(100) ) on EmployeeBean.
> // works fine
> 2. create(200, "aaaa", 2000 ); // Works fine
>
> Now data in table : (100,myname,2000) , (200,"aaaa", 2000);
>
> SCENARIO SECOND :
> Restart the server , and run the client SECOND time after
> making the client
> to sleep for some secs :
> 1. finByPrimaryKey(new EmployeePK(200)) ; // works fine
> 2. client thread sleep();
> 2. The above remote objects gets passivated.
> 3. create(300) ; works fine, BUT
>
> the data in the table is :
> (100,myname,2000) , (200,"aaaa", 2000), (300,"aaaa", 2000);
> instead of :
> (100,myname,2000) , (200,"aaaa", 2000), (300,NULL,NULL);
>
> Hence, the values of a bean from the pool when assigned it doesnt get
> initilized to zero/NULL , instead its previous values are
> carried on to next
> assigned remote object, which lead to in-correct data entry
> into fields
> which are not assigned by the user, when it has to be NULLs
> in database.
>
> Any comments on this, will help us in understanding and development of
> further applications.
>
> (Used Weblogic 4.51, On Oracle8, On NT !!)
>
> Thank you,
> Regards.
>
> Ganapur Srinivas.
>
> Cognizant Technology Solutions India Ltd.
> Ground Floor,
> Deepak Complex,
> National Games Road,
> Opp.Pune Golf Course,
> Yerwada.
> Pune 411006.India.
> Tel. :6691960.Extn-2277.
> [EMAIL PROTECTED]
>
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