I have been working through a JBoss (5.0.0.CR2) example using the tutorial at http://www.netbeans.org/kb/55/ejb30-jboss.html#Exercise_5 (however using Netbeans 6.5).
I have an entity set up and upon deployment it is creating the table on the database. My problem is when I try to use a SLSB as a facade to retrieve entities back from the database. The generated code is as follows:
@Stateless
public class CustomerFacade implements CustomerFacadeLocal {
@PersistenceContext
private EntityManager em;
public void create(Customer customer) {
em.persist(customer);
}
public void edit(Customer customer) {
em.merge(customer);
}
public void remove(Customer customer) {
em.remove(em.merge(customer));
}
public Customer find(Object id) {
return em.find(Customer.class, id);
}
public List<Customer> findAll() {
return em.createQuery("select object(o) from Customer as o").getResultList();
}
}Unfortunately when I run this code, I get a NullPointerException upon usage of em because the PersistenceContext isn't being injected (I presume). This I'm sure is a config error, however I have also tried
@PersistenceUnit(unitName = "PrototypeCRMSystem-ejbPU")
private EntityManagerFactory emf;
private EntityManager em = emf.createEntityManager();
which gives the same problem when accessing emf.
My persitence.xml is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="PrototypeCRMSystem-ejbPU" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/OracleDS</jta-data-source>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9iDialect"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="hibernate.show_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
Am I missing something configuration-wise or is there a problem?
Thanks
