I am having similar problem as yours. Any solution for CMP beans using
sequences from Oracle for primary key ?
> -----Original Message-----
> From: Lars Hagrot [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, April 25, 2000 2:23 PM
> To: [EMAIL PROTECTED]
> Subject: Who is generating the key when you are using CMP?
>
>
> When you build a real system ( not a tutorial) you will recognize the
> problem below.
>
> If you have an Entity Bean and use CMP there must always be a unique
> key. Where does it come from?
>
> 1) from the "user" (and passed as parameter to the create method)?
> 2) from the EJB-Container or some Session bean (how does it know it is
> unique)?
> 3) from the database ( for example "max(col)" or "identity")?
>
> In 1) and 2) you can assign the key in the create method.
> But in 3) you must do a query or insert a row to get the key but how
> can I tell the Container do do that. I am supposed to assign
> the key in
> the create method.
>
> Is there any standards for this problem?
> Does this imply that example 3) must be implemented as BMP?
>
> What is the best solution if it has to be scalable and shall work with
> cluster of EJB-Servers?
>
> Regards
>
> Lars Hagrot
>
> --
> Lars Hagrot E-mail: [EMAIL PROTECTED]
> Object Technology Mentoring Phone: +46 8 50714409
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> Sweden
>
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