Class sharing between rar and ear

[weberj]

I want to port an app to JBoss 7 where an ejb in an ear accesses a resource adapter in a rar.

I get a ClassCastException because ear and rar have different classloaders.

How would one solve this? In JBoss 4 I had put the common classes into server/lib.

Put the rar into the ear and make the ejb use the classes from the rar? How?

Extract the common classes into a shared module? Not nice.

I tried <global-modules> but this did not work.

And yes, I read "Class Loading in AS7" ;-)

Thanks, Juergen

[lafr]

This is probably one of the most frequently asked questions.

Seems ypu overlooked something while reading the classloading topic.

Different ways available, like jboss-deploymentstructure.xml.

The easiest way for me was to add a manifest entry to the ear file:

<attribute name="Dependencies" value="deployment.controller.rar, deployment.filesystem.rar"/>

With this, the ear file can use classes from the deployments named controller.rar and filesystem.rar.

Only those rar-files contain the shared class files, the ear file does not.

[weberj]

Thanks, I got it to work with my.ear/META-INF/jboss-deployment-structure.xml

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">

    <deployment>

        <dependencies>

            <module name="deployment.my.rar" export="true"/>

        </dependencies>

        </deployment>

</jboss-deployment-structure>

export="true" is important, else there are NoClassDefFoundError for the RA classes, I guess the ear classes don't see javax.resource.*