[hibernate-dev] Could we have a Hibernate 5.3 compatibility layer that includes the ORM 5.1 Hibernate Session class

[Sanne Grinovero]

Didn't we discuss this at our last meeting?

The general opinion - and final verdict - was that doing like you're
asking now again would be way too much work and not generally worth
it, not least not in the best interest of all our users. Technically
it's certainly possible, but a lot of work going at cost of more
useful progress, not least possibly causing confusion to users in
various ways.

Our proposal is unchanged (from the meeting):

we'll have - experimentally - two versions in WildFly.

In a first stage this would be version 5.1 and 5.3, so that people
needing backwards compatibility with 5.1 can use 5.1 (can't have
better compatibility than that!), while people wanting to use a later
version can opt in for that.

In a second stage, possibly onboarding some lessons, version 5.3 will
be gradually replaced with 6.0. MAYBE 6.0 will be API compatible with
5.3, but definitely not with 5.1.

I'm not sure if we can have this in WildFly.next, but the sooner the
better. As soon as we have a stable release of Hibernate ORM 5.3 we'll
start looking into details of such a double integration.

Thanks,
Sanne




On 31 January 2018 at 06:43, Scott Marlow <smarlow at redhat.com> wrote:
> WildFly would like to have a version of 5.3+, that is compatible with ORM
> 5.1, with regard to the org.hibernate.session changes (including mapping of
> exceptions thrown, so that the same exceptions are thrown).
>
> Is it even possible to have an extra org.hibernate.Session interface + impl
> (bridge) that matches the same session included in 5.1?  The impl would
> delegate to the real underlying org.hibernate.Session impl classes and also
> wrap thrown exceptions, so that Hibernate 5.1 native ORM apps, continue to
> work without code changes
>
> Or something like that.
>
> I could see how some users wouldn't want to use the compatibility layer to
> avoid extra overhead, so in WildFly, we would have to make that possible
> also.
>
> What do you think?
>
> We would need something similar in ORM 6.0+ that is also compatible with
> 5.1, if this is possible.
>
> Scott
> _______________________________________________
> hibernate-dev mailing list
> hibernate-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/hibernate-dev