Hi guys
I am trying to implement a unique constraint validator, one that checks that no entities exist in the database before passing validation. This validator class implements ConstraintValidator. We are using JPA2 and EJB 3.1, and need access to either the EntityManager or the EJB's. But no matter how I try to inject either of them, I always get null (i.e. it is not injected). I have also tried accessing the EntityManager using:

Persistence.createEntityManagerFactory("myPU")

But this throws an exception:

"The chosen transaction strategy requires access to the JTA TransactionManager".

We are using Hibernate Entitymanager 3.5.0-CR-2 and the Hibernate Validator that is bundled with Glassfish V3.

Any suggestions on how to accomplish this would be greatly appreciated.

Regards,

Anders

Hi,

I think this might help - How to write a custom ConstraintValidatorFactory.

Also have a look at viewtopic.php?f=9&t=999868

--Hardy

Great! Looks like exactly what I need, thanks.

-Anders