[keycloak-dev] User Federation Provider with JPA

[Scott Rossillo]

We'll publish an example of how to do this soon, but I'd recommend writing
an API based provider on your legacy system instead of using a direct
database connection from Keycloak. Sorry, doesn't exactly answer your
question but it's a more elegant solution.
On Mon, Sep 7, 2015 at 12:18 PM alex orl <alex_orl1079 at yahoo.it> wrote:

> 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.
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