Configure Persistence Unit

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1 . Introduction to EJB 3 with movies

2 . Set Up the EJB 3 environment with Movies

3 . Creating the J2EE Project

4 . Inspecting the J2EE Project

5 . Create Session Bean skeleton:

6 . Create Entity Bean:

7 . Create the Session Bean POJI

8 . Define the POJI methods

9 . The EntityManager:

10 . Coding the business methods:

11 . Configure Persistence Unit

12 . Struts - a quick overview:

13 . Create the Struts Web layer:

14 . The Struts configuration file:

15 . The execute method:

16 . The insert & delete methods

17 . Javascript functions

18 . JSP body

19 . Deploy, review database and Test:

20 . Example Code

21 . Example Code

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Ejb Tutorial

Configure Persistence Unit

<< Prev: Coding the business methods:

Next: Struts - a quick overview: >>

As mentioned earlier, the server must be configured to force creation of new and update of existing tables created by our entities in our programme.

This can be done by adding a property to the persistence.xml file located in the META-INF of the EJB project. The persistence-unit name is set to devDB and the JTA datasource is set to the JNDI name java:devDS as configured in the Jboss server.

As Jboss uses Hibernate for its persistence provider, we need to add a property named "hibernate.hbm2ddl.auto" with a value of "update".

See what I did here