Configure JavaAgent in JBoss to enhance OpenJPA entities

[aristides]

Hello everyone,

I´m trying to configure JBoss AS 7 to use OpenJPA as provider, I gatthered a lot of info from the forum and I think I got everything configured and working.

My problem now is that I can´t make the OpenJPA JavaAgent to enhance the entities. I know that there´s build options to enhance the entities, but it doesn´t like when an Entity in module A extends an entity in module B, also I have several modules and I´m not done with adding maven and would be difficult to enhance all of then.

I´ve tried to edit the standalone.conf :

JAVA_OPTS="$JAVA_OPTS -javaagent:C:\\dev\\jboss-as-7.1.1.Final\\modules\\org\\apache\\openjpa\\main\\openjpa-all-2.2.0.jars"

I ´ve also tried setting the JBOSS_MODULES_SYSTEM_PKGS="org.apache.openjpa".

But in any case I don´t get the entities enhance and the OpenJPA throws an error saying that the enhance was not done.

I´m open to suggestions and I would like to thanks everybody for the help.

Thanks,

Aristides

[nickarls]

Are there indications the agent is picked up? / (forward-slash) is probably better than \\ (double-backslash)

[aristides]

Thanks Nicklas, yes changing the "\\" to "/" did seen to make the agent start working,

JAVA_OPTS="$JAVA_OPTS -javaagent:C:/dev/jboss-as-7.1.1.Final/modules/org/apache/openjpa/main/openjpa-all-2.2.0.jars"

Now I´m having problem with the classpath, this agent depends on an couple of jars, like: commons-lang-2.1.jar, geronimo-jpa_3.0_spec-1.0.jar and geronimo-jta_1.1_spec-1.1.jar.

This jars are parte of my module (modules\org\apache\openjpa\main), but I understand that they run in a separate classloader.

If I just run I get a CNFE on a commons-lang class, so I added this libraries using:

JAVA_OPTS="$JAVA_OPTS -Xbootclasspath/a:C:/dev/jboss-as-7.2.0.alpha2/modules/org/apache/openjpa/main/commons-lang-2.1.jar"

So if I do this for all dependencies the CNFE doesn´t appear, but latter on initialization I get a ClassCastException when JBoss is processing the persistence.xml and tries to load the class org.apache.openjpa.persistence.PersistenceProviderImpl.

I think the ClassCastException is caused because the PersistenceProviderImpl appears both in the agent and in the openjpa module.

So my question, Is there a way to make the agent work without affecting the application classloader?