[hibernate-dev] Hibernate as JPA persistence-provider in SAP Netweaver

[Steve Ebersole]

On Friday 31 August 2007 01:27:24 am De Silva Jayasinghe, Robin wrote:
> Hi Steve!
>
> > We are aware that the Hibernate SessionFactory attempts to obtain a
> > Connection during its construction in order to query the JDBC metadata,
> > yes.
> >
> > I think you may be slightly confused (it seems that way to me anyway). 
> > The connection obtained during construction of a SessionFactory has
> > absolutely nothing to do with the connections used by sessions.
>
> I accept the fact that the connection obtained by SessionFactory is in no
> relation to the one used by the Session. However, Table 2 in chapter 4.5.2
> of "EJB 3.0 Core Contracts and Requirements" states that during dependency
> injection in a SLSB the access to ResourceManager is not allowed. We
> interpret this part of the spec in a way that a SLSB is not allowed to
> access to any resources (including datasources). Of course we accept the
> fact that you might interpret the spec in a different way. I only want to
> raise some awareness that Hibernate in its current state does not run as
> smooth as it could on Netweaver.
>
> Best Regards,
> Robin
>
> --
AFAICT, this is caused by your (atypical) decision to create the 
SessionFactory (EntityManagerFactory) upon first injection.  If the 
SessionFactory were created up front at app start-up (which is by far more 
typical) you'd not have any issue.