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Posted to users@openjpa.apache.org by Udi <Sa...@gmail.com> on 2009/08/03 15:24:37 UTC

EntityExistsException issue

Hey,
I have this case:

class Book{
     @id
     protected long id;
     private static number = 0;

     @prePersist
     private void makeSomeID(){
           id = ++number;
     }
}

class Persister{
     public static void main(...){
           while (true){
                  em.persist(new Book());
           }
     }
}

I don't know why I sometimes get EntityExistsException.
The openJPA documentation says nothing about this exception. Why do I get
it?

ps - I know it's not compiling, I just can't copy the code from the
workspace...

thanks

Udi
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Re: EntityExistsException issue

Posted by Jean-Baptiste BRIAUD -- Novlog <j-...@novlog.com>.

I'm not sure but did you try to add transient keyword on your statif  
number field ?

On Aug 3, 2009, at 15:24 , Udi wrote:

>
> Hey,
> I have this case:
>
> class Book{
>     @id
>     protected long id;
>     private static number = 0;
>
>     @prePersist
>     private void makeSomeID(){
>           id = ++number;
>     }
> }
>
> class Persister{
>     public static void main(...){
>           while (true){
>                  em.persist(new Book());
>           }
>     }
> }
>
> I don't know why I sometimes get EntityExistsException.
> The openJPA documentation says nothing about this exception. Why do  
> I get
> it?
>
> ps - I know it's not compiling, I just can't copy the code from the
> workspace...
>
> thanks
>
> Udi
> -- 
> View this message in context: http://n2.nabble.com/EntityExistsException-issue-tp3377645p3377645.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>

Re: EntityExistsException issue

Posted by Rick Curtis <cu...@gmail.com>.



Udi wrote:
> 
> Hey,
> I have this case:
> 
> class Book{
>      @id
>      protected long id;
>      private static number = 0;
> 
>      @prePersist
>      private void makeSomeID(){
>            id = ++number;
>      }
> }
> 
> class Persister{
>      public static void main(...){
>            while (true){
>                   em.persist(new Book());
>            }
>      }
> }
> 
> I don't know why I sometimes get EntityExistsException.
> The openJPA documentation says nothing about this exception. Why do I get
> it?
> 
> ps - I know it's not compiling, I just can't copy the code from the
> workspace...
> 
> thanks
> 
> Udi
> 

Are you cleaning your database out between each run?

-Rick

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