How are you including your jar file? Is it located under 'standalone/configuration/providers'? Or did you create a module? If you created a module be sure to include 'javax.persistence.api' as a dependency. That was an issue I ran into, making sure I included the correct dependencies for my module.

Tristan

On Mon, Aug 24, 2015 at 10:33 AM, Libor Krzyžanek <lkrzyzan@redhat.com> wrote:

Hi there,
within my listener factory's postInit method I’m creating a separate thread that needs to run a sql query by using entity manager from JPA provider.

In thread I do
KeycloakModelUtils.runJobInTransaction(sessionFactory, new KeycloakSessionTask() {
@Override
public void run(KeycloakSession session) {
…
EntityManager em = session.getProvider(JpaConnectionProvider.class).getEntityManager();
TypedQuery<UserEntity> query = em.createQuery(
"select u from UserEntity u where u.realmId = :realmId order by u.username", UserEntity.class);

Unfortunately I got java.lang.NoClassDefFoundError: javax/persistence/EntityManager

I tried to set various class loaders via
thread.setContextClassLoader(DefaultJpaConnectionProviderFactory.class.getClassLoader());

but with no success.

I’m running this on EAP 6.4.

What is the proper way how to retrieve entity manager for running custom queries?

Thanks,

Libor Krzyžanek
jboss.org Development Team

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