Re: [hibernate-dev] classloading issue when trying to add envers to as7
On Jun 20, 2011, at 7:56 PM, Scott Marlow wrote:
>
> and adding envers into org.hibernate module, means there will no org.hibernate.envers
module, and a (jpa) app's classloader can access org.hibernate module, right? so it
can access envers class too.
Wrong, just adding envers to org.hibernate (either via a module dependency or the jar
directly) doesn't result in envers being exported from the org.hibernate module.
There is an option to do that, if so desired (via the export="true"). The
better option is knowing whether or not it is needed and dynamically injecting envers only
if it is.
Not sure how it works exactly, but I suppose that if the application declares somehow that
it uses Envers, only then the Envers module should be visible? Looking at the dependencies
tree between Hibernate modules, Envers is a leaf, so in theory it should be doable ;).
From what you previously said, I think the dependencies are:
- Application classes may reference the envers annotation.
- Application classes may reference Hibernate classes.
- Hibernate core may reference envers.
- Hibernate envers may reference Hibernate core.
Sound right so far?
Well Core doesn't reference Envers in any way.
Envers aside, I think the Integrators should work anyway. Say a user creates his own
Integrator and puts it as part of the application classes - will Hibernate see it on
startup? The same applies to Envers - Hibernate should see the integrator if the module is
enabled.
--
Adam Warski
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http://www.warski.org
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