I have a EJB-Project and a JBoss 7.1 Server and a PostgreSQL database. I want to get a Entitymanager by PersistenceContext like this:

private EntityManager em;


<persistence-unit name="PlayerService" transaction-type="JTA">
  <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>

I start the JBoss Server, go into the admin console and configure a JDBC Datasource. I copied postgresql-9.3-1101.jdbc41.jar into the deployment-Folder of the Server, so I can choose that driver when I create the datasource. The datasource name is PlayerService, the JNDI path is java:jboss/PlayerService. I enabled the datasource also as default Datasource in the JPA Subsystem.


still throws a null pointer, I guess because I try to access the PersistenceContext from outside the server (from a java-class with a seperate main-function for testing). What do I have to do to get that working. Would it work from the deployed project on the server? I have the feeling I'm missing some last step/s.

1 Answers

Steven Pessall On Best Solutions

I try to access the PersistenceContext from outside the server

In your Unit tests you need to initialize the EntityManager yourself.

EntityManagerFactory factory = Persistence.createEntityManagerFactory("PlayerService");
EntityManager em = factory.createEntityManager();