I'm developing a keycloak user-federation-provider and i need to integrate it with the JPA persistence system in order to write on my legacy db and on the keycloak db.

I read that Jboss WildFly already uses Hiberante 4.3 JPA, so i choose to follow this line for my project.

Another requirement is to decouple the provider and the JPA model-mapping-project, so  my JPA model-mapping-project has to be deployed a separated jar file.

Following the keycloak userguide i deploy the provider simply coping  the built jar project into the .../standalone/configuration/providers directory.

The JPA model-mapping-project jar file is deployed into the Wildfly using the management console deployment section.

Now i'm facing up to 2 problems:

1) the user-federation-provider doesn't see the model-mapping-project  classes (throwing the ClassNotFoundException)

2) if i simply copy the model-mapping-project.jar into the /standalone/configuration/providers directory, the fereration provider sees the classes but the EntityManager dependency injection does not work (NullPointerException)

What the way i can solve this problem?

Is there another way to deploy providers? and what about the jar and the depecency injection?

Thanks

Regards.