[opencms-dev] JPA

[Jakub Ječmínek]

Hello,
I've been playing around with JPA in OpenCms(on default isntallation of
OpenCms 8.5.1). I have problem with creation of EntityManager from
EntityManagerFactory.
I am trying to obtain EntityManager in stadard way from
EntityManagerFactory with default OpenCms pool name OpenCmsJPAPool.
 EntityManagerFactory emf =
Persistence.createEntityManagerFactory("OpenCmsJPAPool");
 EntityManager em = emf.createEntityManager();
 em.close();
 emf.close();

This code gives me an error:
Cannot create JDBC driver of class '' for connect URL 'null'
Reason: Cannot create JDBC driver of class '' for connect URL 'null'

This would sugest that there is something wrong with configuration in
persistance.xml but I did not modify this file, so it should be ok.
Has anybody experienced this issue? Or if anybody has a code snippet as
example of  working with JPA in Opencms I'd be very greatful. I'd love to
use JPA in a module that I am developing.

Thanks.

Jakub Ječmínek
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NELASOFT Technologies, s.r.o.
Mob: +420 604 575 772
E-mail: jakub.jecminek at nelasoft.cz
Web: www.nelasoft.cz
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