[jbosstools-dev] BIRT Deployment

[Max Rydahl Andersen]

> There is a problem with deploying a BIRT web project when using
> Hibernate. Hibernate classes can't be loaded from within the OSGi
> framework because they have already been loaded with web classloader.

...this just sounds like a really broken design in BIRT...I can't beleive
they don't support using classes from the sourrounding webapp.

> It is possible to solve this issue in several ways:
>
> 1) Using JNDI JDBC datasource.
> It is necessary to create a separate session factory within OSGi; the
> ODA plugin has to contain Hibernate libraries. In my opinion, this is
> the worst solution and I skipped it.

Yes.

> 2) Using JNDI SessionFactory and reflection.
> The server has to bind the SessionFactory in JNDI, using
> <property name="hibernate.session_factory_name"
> value="java:/[ODA_DATASOURCE_NAME]"/>
> in the persistence.xml file, for instance.
> I have implemented this solution.

hmm...not sure how many binds it to jndi...not sure even if Seam does that?

> 3) Creating a Session Facade Bean that would execute and analyze a query
> for clients (BIRT OSGi engine)
> This solution can be easily implemented, but requires an EJB environment.

hmm...why ? I don't follow this ?

> 4) Injecting web classloader into OSGi bundles using Adaptor Hooks
> (http://wiki.eclipse.org/index.php/Adaptor_Hooks). I haven't implemented
> this method yet, but think that the problem can be solved this way. I
> will try it ASAP.

Ok - sounds interesting.

> I have committed the org.jboss.tools.birt.core plugin that fixes the
> BIRT facet (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=235206)
> and changed the o.j.t.b.oda and o.j.t.b.oda.ui plugins in order to
> implement solution #2.
> Tested using Ganymede RC2.

Ok, when I get my ganymede updated ill try.
Do we need our Birt facet going forward ? Birt it self accepted the patch, right?

-max