[hibernate-dev] JdbcSession proposal

[Gail Badner]

Hi Steve,

Looking at the Javadoc for javax.transaction.Transaction.registerSynchronization(Synchronization sync), I see:

Throws: RollbackException - Thrown to indicate that the transaction has been marked for rollback only.

That would make it a JTA spec requirement.

More feedback coming... 

----- Original Message -----
> From: "Steve Ebersole" <steve at hibernate.org>
> To: "hibernate-dev" <hibernate-dev at lists.jboss.org>
> Sent: Friday, December 6, 2013 10:07:22 AM
> Subject: Re: [hibernate-dev] JdbcSession proposal
> 
> So I'll get the ball rolling :)  Here is one thing in particular I was
> hoping to start a discussion on...
> 
> For JTA transactions we currently have a lot of complex logic to manage
> who "drives" the transaction flow into Hibernate (in terms of Hibernate
> reacting to the completion).  There are potentially 2 drivers:
> 1) A JTA Synchronization registered with the JTA system
> 2) The org.hibernate.Transaction instance
> 
> A lot of the complexity in our current code comes from the fact that we
> have a lot of attempting to handle cases in which the JTA
> Synchronization cannot be registered.  So one of the simplifications I
> am wanting to make here is to say that the driver will always be the
> JTA Synchronization.  So I am trying to determine how "actual" these
> cases where the "JTA Synchronization cannot be registered" are.
> 
> The only one that I am aware of IIRC is that JTA Synchronization cannot
> be registered on transactions that are marked for rollback-only.  I
> cannot remember though if that was a specific provider (JBossTS?) or a
> JTA/JTS spec requirement.
> 
> So the proposal I have is that for JTA cases we always register the JTA
> Synchronization and allow that to drive the "before/after completion"
> callbacks (the org.hibernate.Transaction would still potentially manage
> actually calling commit/rollback on the
> TransactionManager/UserTransaction).  In short, does any one see
> problems with this approach?
> 
> 
> On Wed 04 Dec 2013 11:27:10 AM CST, Steve Ebersole wrote:
> > I found a few spare minutes to work on this a little and move it into
> > the next stage with some actual interfaces, impls and usages to help
> > illustrate some of the proposed concepts.
> >
> > https://github.com/sebersole/JdbcSession
> >
> > The README.md is very up-to-date and detailed.  Would be good to get
> > input from others.
> >
> >
> > P.S. I probably dislike the *Inflow naming more than you do :)
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