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From "Craig Russell (JIRA)" <>
Subject [jira] Commented: (OPENJPA-305) Dynamic configuration of EntityManagerFactory
Date Fri, 03 Aug 2007 04:38:52 GMT


Craig Russell commented on OPENJPA-305:

I agree with Patrick.

The intent of making the EMF not configurable after the first getEM is just so that you can
find an EMF based on the user-defined values.

If you ask for an EMF that has a default property, and that property has changed, then you
cannot get the behavior you expect.

> Dynamic configuration of EntityManagerFactory
> ---------------------------------------------
>                 Key: OPENJPA-305
>                 URL:
>             Project: OpenJPA
>          Issue Type: New Feature
>            Reporter: Pinaki Poddar
> OpenJPA configures EntityManagerFactory at creation time via an instance of Configuartion
object. Once EntityManagerFactory is created and a EntityManager is issued from it -- the
Configuration is frozen by design. That is no further changes to Configuration is allowed
as long as EntityManagerFactory lives.
> For certain configuration properties, it is desirable to change them during the lifetime
of a EntityManagerFactory.
> This issue is raised to initiate a discussion on such a feature, the possibility and
limitations of dynamic update and track the impact of such a change as frozen Configuration
is an important assumption.

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