Hi Mike,
How should the app server reinitialize the entity manager instance then?
Regards,
Christian
On Fri, May 11, 2012 at 3:22 PM, michael keith <michael.keith_at_oracle.com>wrote:
> Hi Christian,
>
> The clear() method was not intended to reinitialize the EM, but is just a
> method that causes all of the entities in the persistence context to be
> detached. You can actually see an example on page 300 that highlights this
> fact. The footnote you reference was just making reference to the fact that
> a clear() call would need to be made on the EM in order for it to be
> reused. It was not intended to be a complete description of how to reuse an
> EM, or of other issues that might also need to be handled. I admit that it
> could be a bit misleading, though...
>
> Regards,
> -Mike
>
>
> On 10/05/2012 9:58 AM, Christian Romberg wrote:
>
> Dear group,
>
> The spec (2.0) says, p.304, section 7.9.1, footnote 79:
>
> "The container may choose to pool EntityManagers: it instead of creating
> and closing in each case, it may acquire one from its pool
> and call clear() on it."
>
> What should happen with any property settings that were changed by the
> user?
> E.g. setFlushMode or any vendor-specific properties?
>
> Should clear() also reset them to the values configured for the
> EntityManagerFactory?
>
> I think this would make sense to get a clean, reusable EntityManager.
>
> And if this is the common understanding of how clear() should work, I
> suggest that we add
> that in the spec.
>
> Thank you!
>
> Christian
>
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