[rules-users] JPA process working in container?

[Michal Bali]

Hi Garrett,

The persistence is very pluggable. I'd suggest to copy
SingleSessionCommandService, remove all JTA code and then manage
transactions declaratively using Spring.

Best regards,
Michal


2009/8/14 Garrett Conaty <garrett at conaty.net>

> Hi there,
>
> Has anyone been successful with Drools 5.1 and persistent processes?  I've
> been debugging for quite a while now and not sure if the code was meant to
> run in a container.
>
> I'm using Spring 2.5, Drools 5.1, and Hibernate 3.3
>
> Specifically:  In SingleSessionCommandService
>
> a) the constructor starts a new UserTransaction regardless if one is
> already active.  Using Bitronix TM or some other that doesn't support nested
> transactions causes this to fail
>
> b) The use of 'this.em' as the entity manager across calls to
> 'execute(GenericCommand<t> command) doesn't work with JTA and Hibernate.
>  Specifically the Hibernate session is closed when the JTA transaction
> commits.  Therefore, this.em cannot be reused
>
> c) this.localEm is never used
>
> Anyhow, I'd be happy to supply more information and understand the
> rationale behind the implementation.  I'm using it on a client project, and
> willing to fix (if it's actually broken), but I get the feeling I'm the
> first person to try this in a JTA environment
>
> Thanks,
> Garrett
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>
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