Search for Wonseok's blog on TopLink Essentials caching :).
Regards,
-marina
Daniel H. Cavalcanti wrote:
> Hi,
>
> I have a question about JPA. I have an enterprise application that
> contains two ejb modules and a web module.
>
> One of the ejb module I call persistence, which contains all my entity
> classes and facade classes to manage the data in the database.
>
> The other ejb module I call services, which provides the business API
> and implementation. It uses the persistence module to access/handle the
> data in the database.
>
> finally, the web module is just the UI implementation of the
> application. It also contains a set of servlets that clients that do not
> support web services can use to access the database.
>
> Now, here is my problem. One of the servlets takes a username/password,
> looks up the user in the database and returns data associated with the
> user (user model). This works fine except for the case:
>
> 1. Get the user model through the serlvet.
> 2. Add data to the user model.
> 3. Get the user model through the servlet does not reflect the changes
> made.
>
> However, if I connect to the database directly through another tool, I
> can issue SQL queries and I see the changes there.
>
> I know I'm missing something in the entity manager to get the most
> recent data. The returned data is definitely from a cache, which I don't
> want.
>
>
> I have placed a entityManager.flush() after all calls to the
> entityManager that create, update, or delete entities.
>
>
> thanks,
> Daniel.
>
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