[jboss-as7-dev] Consolidated list of non-Java EE JPA and native Hibernate issues

[Jason T. Greene]

On 8/30/11 10:25 AM, Marius Bogoevici wrote:
> On 08/30/2011 10:52 AM, Scott Marlow wrote:
>> Is anyone working on jboss-ignore.txt for AS7.x?  I'm still wondering
>> if we should have a way to tell JPA to ignore a deployment.
>
> https://issues.jboss.org/browse/AS7-1128
>
> I started prototyping something a while ago then it couldn't make it to
> 7.0 so I slacked it off. Need to bring back though - I can get back to
> this next week, unless anyone wants to take over beforehand.
>
> One issue that I have encountered for a generic implementation was that
> deployment processors read files directly from VFS, so we cannot easily
> incorporate the information from jboss-ignore.txt in the deployment
> process (as it was the case with the MC-based deployers, where Ales
> added the jboss-ignore.txt processing into one of the superclasses).
>
> So, I'm wondering what is the best way of handling this:
>
> a) Adding an intermediate DeploymentResources object that sits on top of
> VFS and incorporates the filtering information from jboss-ignore.txt .
> Deployment processors would use DeploymentResources to get a filtered
> view of the deployment resources instead of using VFS directly.
>
> b) Using jboss-deployment-structure.xml for dedicated deployment
> instructions (<ignore-jpa/>)
>
> c)?
>
> My preferred alternative would be a), perhaps incorporating filtering
> rules in jboss-deployment-structure.xml.
>
> Thoughts?

I think we first need to come up with the list of use cases for what we 
want to be disabled. There is a large potential for this feature to 
break things or not work as intended. For example, if you exclude 
web.xml you aren't guaranteed to disable servlets.

It also causes a problem with annotation scanning. If someone bundles an 
index that contains entries to classes which are then filtered by this 
ignore feature it will either blow up or not do what they thought they 
intended.

-- 
Jason T. Greene
JBoss AS Lead / EAP Platform Architect
JBoss, a division of Red Hat