[seam-dev] lobbying for alternative JPA provider support in 2.0.2.SP1

[Dan Allen]

To clarify, this issue only occurs when using a Seam-managed
persistence context (JPA). We don't see this in the jee5 example
because it uses strictly container-managed persistence.

-Dan

On Tue, May 27, 2008 at 1:36 PM, Pete Muir <pete.muir at jboss.org> wrote:
> It looks like we will end up having a 2.0.3 release. I would prefer not to
> put this fix for which there is an easy workaround into this release
> especially as I don't think this fix is correct (we shouldn't call
> setManualFlushMode() from there at all).
>
> On 27 May 2008, at 16:37, Dan Allen wrote:
>
>> Seam devs,
>>
>> I am bringing a topic that happened in a private e-mail between Jay
>> and I to the list.
>>
>> The main issue that I really want to see included in 2.0.2.SP1 is this
>> fix for the PersistenceProvider (JBSEAM-3030). It bothers me that we
>> are blatantly not supporting other JPA providers, even though we all
>> know how important manual flushing is (trust that I find it the single
>> most lacking feature in JPA). This is not a regression, but it sure
>> feels like one.
>>
>> The backstory is that if you have at least one component with a
>> persistence context (e.g. @In private EntityManager entityManager or
>> @PersistenceContext private EntityManager entityManager), then Seam
>> will attempt to put it into manual flush mode before rendering. When
>> that happens, you are using the generic JPA provider, an exception is
>> thrown, failing the rendering process. The only way around this issue
>> is to implement your own PersistenceProvider and override the
>> setManualFlushMode() to do nothing. My fix changes this exception to a
>> log warning message.
>>
>> -Dan
>>
>> --
>> Dan Allen
>> Software consultant | Author of Seam in Action
>>
>> http://www.mojavelinux.com
>> http://manning.com/dallen
>>
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>
>



-- 
Dan Allen
Software consultant | Author of Seam in Action

http://www.mojavelinux.com
http://manning.com/dallen

NOTE: While I make a strong effort to keep up with my email on a daily
basis, life and work come first and, at times, keep me away from my mail
for a while. If you contact me, then don't hear back for more than a week,
it is very likely that I am excessively backlogged or the message was
caught in the spam filters. Please don't hesitate to resend a message if
you feel that it did not reach my attention.