JBoss.org Community Documentation
Persistent classes that are mapped using Hibernate *.hbm.xml files are supported in JBoss. The EJB3 Deployer will search the archive
for any .hbm.xml files and add them to the definition of the underlying Hibernate SessionFactory. These
.hbm.xml files can be virtually anywhere within the archive under any java package or directory.
Take a look at the customer.hbm.xml for an example.
Class mappings defined in .hbm.xml files can be managed by EntityManagers just as annotated
@Entity beans are. Also, you are allowed to have relationships between a .hbm.xml
mapped class and an EJB3 entity. So, mixing/matching is allowed. Which means you can have some entities defined in .hbm.xml and
some others through @Entity annotations.
You can inject a org.hibernate.Session and org.hibernate.SessionFactory
directly into your EJBs just as you can do with EntityManagers and EntityManagerFactorys. The behavior of a Session is
just the same as the behavior of an injected EntityManager. The application server controls the lifecycle of the
Session so that you do not have to open, flush, or close the session. Extended persistence contexts also work
with injected Hibernate Sessions.
import org.hibernate.Query;
import org.hibernate.Session;
@Stateless
@Remote(CustomerRemote.class)
@RemoteBinding(jndiBinding = "CustBean")
public class CustomerBean implements CustomerRemote
{
@PersistenceContext
private Session session;
Take a look at org.jboss.tutorial.hibernate.bean.CustomerBean for more details.
You can get access to the current underlying Hibernate Session by calling the getDelegate method on the
EntityManager :
@Stateless
@Remote(CustomerRemote.class)
@RemoteBinding (jndiBinding="AnotherCustBean")
public class AnotherCustomerBean implements CustomerRemote
{
@PersistenceContext
private EntityManager em;
public Customer getCustomer(long id)
{
org.hibernate.Session session = (Session) em.getDelegate();
return (Customer) session.get(Customer.class, id);
}
...
Take a look at org.jboss.tutorial.hibernate.bean.AnotherCustomerBean for more details.
You can get access to the current underlying Hibernate Query by typecasting your reference to a org.hibernate.ejb.QueryImpl.
public List<Customer> getCustomers(String fname)
{
org.hibernate.ejb.QueryImpl queryImpl = (QueryImpl) em.createQuery("from Customer where fname ='" + fname + "'");
org.hibernate.Query query = queryImpl.getHibernateQuery();
return query.list();
}
To build and run the example, make sure you have installed JBoss 5.x. See the Section 1.1, “JBoss Application Server 5.x” for details.
From the command prompt, move to the "hibernate" folder under the Section 1.3, “Set the EJB3_TUTORIAL_HOME”
Make sure your JBossAS-5.x is running
$ ant
$ ant run
run:
[java] Jai Pai created with id = 1
[java] Jaikiran Pai created with id = 2
[java] Jai NoLastName created with id = 3
[java] Searching for customer with id = 2
[java] Found customer Jaikiran Pai with id = 2
[java] Searching for customer with id = 3
[java] Found customer Jai NoLastName with id = 3
[java] Searching for customers with first name Jai
[java] Found 2 customers with first name Jai
[java] Searching for customers with first name Jaikiran
[java] Found 1 customers with first name Jaikiran
$ mvn clean install -PRunSingleTutorial