[wildfly-dev] Exclusions in WildFly

[Juan Manuel CABRERA]

Hello devs,

I have a wildfly war application at hands, which depends on a jar which
starts its own JPA persistence container with Spring. This jar has its own
`persistence.xml`, with  only one persistence unit.
In the embedded jar, since there is only one persistence unit, it is
injected using a `@PersistenceContext` without a unit name. Furthermore,
the objects having such fields are not EJBs, they are simple Spring beans...

On the other hand, the application has also a `persistence.xml` with two
persistence units.
The code of the application has `@PersistenceContext` fields with a proper
`unitName`, which is mandatory since there are two of them.

Now, when I start my application, Wildfly (specifically the jpa module)
scans the code from the jar and chokes on the `@PersistenceContext` without
unitNames of my Spring beans:

    DEBUG [org.jboss.as.jpa.messages] (MSC service thread 1-1) persistence
unit search for unitName=null referenced from class=the.spring.Bean
(annotation=@javax.persistence.PersistenceContext() on void
the.spring.Bean.setEntityManager(javax.persistence.EntityManager))


To cope with this, I would like to exclude the jar: In TomEE there is a
mean to exclude a jar explicitly from being scanned, but I cannot find a
similar functionnality in WildFly.
I have tried the following configurations without success:

 - `jboss-deployment-structure.xml` which is read but without noticeable
effect:

        <jboss-deployment-structure
xmlns="urn:jboss:deployment-structure:1.2">
          <deployment>
            <exclusions>
              <module name="deployment.jee-app.war.spring-app.jar" />
              <!-- I have also tried the following -->
              <!-- <module name="jee-app.war.spring-app.jar" /> -->
              <!-- <module name="spring-app.jar" /> -->
            </exclusions>
          </deployment>
        </jboss-deployment-structure>

 - `jboss-scanning.xml` which seems to be ignored

        <scanning xmlns="urn:jboss:scanning:1.0">
          <path name="jee-app.war/WEB-INF/lib">
            <exclude name="spring-app.jar" />
          </path>
        </scanning>


Both of these files are in the WEB-INF folder of my war application.

Of course, I cannot modify the spring-app.jar (would be too easy...)

Needless to say, I have spend a considerable amount of time in the WildFly
doc and on Google without finding anything else than exluding subsystems,
or overriding locally modules of WildFly...

Thanks for your help!

Juan Manuel

PS: This question is also posted on StackOverflow:
http://stackoverflow.com/q/22932015/3509723
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