Answers to: How to use JPA entity manager instead of Ivy Entity Manager?

Comment by trungdv on Reguel Wermelinger's answer

trungdv — Fri, 02 Feb 2018 04:25:36 -0500

hi @Reguel Werme... ♦♦ Is there any way to overcome this issue? i also want to create Java persistence manager for Junit inside java. Thanks

Comment by Lukas Schmid on Reguel Wermelinger's answer

Lukas Schmid — Wed, 18 Feb 2015 13:29:51 -0500

Thank you for your answer, but if you mock the Ivy class, you need to mock the .persistence().get("PERSISTENCE_UNIT_NAME") aswell. Unfortunately, I wasn't able to do that.

Comment by Reguel Wermelinger on Reguel Wermelinger's answer

Reguel Wermelinger — Mon, 22 Dec 2014 09:28:22 -0500

You need to mock out the Ivy class as described here: http://answers.axonivy.com/questions/617/how-can-junit-access-to-ivy-environment-without-environmentnotavailableexception

Comment by Tran Cuong Truc on Reguel Wermelinger's answer

Tran Cuong Truc — Mon, 22 Dec 2014 09:14:44 -0500

Thanks for the idea but with this way, you still need the Ivy environment in order to get the EntityManager which will cause environment exception in JUnit.

Answer by Reguel Wermelinger

Reguel Wermelinger — Mon, 22 Dec 2014 08:53:05 -0500

The interface of IIvyEntityManager makes it possible to access the "real" JPA EntityManager by invoking createEntityManager(). So code that uses it could look like this:

private static List<String> getMatchingCountries(String country){
    IIvyEntityManager ivyEntityManager = Ivy.persistence().get("PERSISTENCE_UNIT_NAME");
    EntityManager em = ivyEntityManager.createEntityManager();
    try{
        em.getTransaction().begin();

        // DO FANCY PLAIN JPA STUFF
        Query countryQuery = em.createQuery(
            "SELECT DISTINCT a.country FROM Address a " +
            "WHERE a.country LIKE :userInput");
            countryQuery.setParameter("userInput", "%"+country+"%");
        List<String> result = (List<String>) countryQuery.getResultList();

        em.getTransaction().commit();
        return result;
    }
    finally
    {
        em.close();
    }
}