Null Entity Manager

[ifrias]

Hi, I am new with EJB3 and I am having some problems in my SessionBean, when trying to use the EntityManager it throws a NullPointerException.

I am using the Firebird driver, and the persistence.xml file is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<entity-manager>
 <name>sem</name>
 <jta-data-source>java:/FIrebirdDS</jta-data-source>
 <properties>
 <property name="hibernate.dialect"
 value="org.hibernate.dialect.FirebirdDialect" />
 <property name="hibernate.cache.provider_class"
 value="org.jboss.ejb3.entity.TreeCacheProviderHook"/>
 <property name="hibernate.treecache.mbean.object_name"
 value="jboss.cache:service=EJB3EntityTreeCache"/>
 </properties>
</entity-manager>

The JBoss log shows the following when running:

15:38:47,673 INFO [Ejb3Deployment] Create EntityManager with JNDI name: sem

Any ideas about what could be wrong? Thanks!!

[mooktarus]

You probably didn't set up your @PersistenceContext properly. Go back to the EJB3 trailblazer, specifically the section called 'EntityManager Basics'.

[bill.burke]

better yet, download the standalone distribution and look at the tutorials

[ifrias]

Thank you both!
It's been of great help, hope I can make it work