THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
This example shows how to combine Spring, OpenEJB and Hibernate using the integration code provided by OpenEJB. Here, OpenEJB is used as an embeddable EJB container inside of Spring. See the Spring page for details.
We use the basic Movie example and expand it to include more objects to demonstrate both Spring beans, EJB Session beans, and JPA persistent objects in one application. The premise of the example is a Cineplex that has a number of Theaters (viewing screens), each playing a number of Movies. The basic object layout is as follows:
Object |
Type |
Description |
|---|---|---|
@Stateless |
Shows the use of @Resource to have Spring beans injected. Specifically, the Theaters Spring bean |
|
Spring bean |
Simple wrapper object injected into CineplexImpl |
|
Spring bean |
Shows that EJBs can be injected into Spring beans. Uses both the Movies EJB and the Movie JPA objects |
|
@Stateful |
Wraps a JPA EntityManager and provides transactional access to the persistent Movie objects |
|
@Entity |
Basic JPA bean that is used both by Spring beans and EJBs. The same Movie object as in all the other persistence related examples. |
|
Spring bean |
Simple object used as a clever way to seed the EntityManager (and really, the database) with persistent Movie objects |
Required jars
To setup the integration you'll need:
- The standard OpenEJB 3.1 libraries
- The openejb-spring-3.1.jar or later
- Spring 2.5 or other (any version should work)
The Spring xml
Bootstrapping and Configuring OpenEJB is fairly simple.
Error formatting macro: snippet: java.lang.NullPointerException
As well, you can optionally declare any resources or containers. Anything declarable as a <Resource> or <Container> in the openejb.xml can instead be declared in the Spring xml file as shown here.
Error formatting macro: snippet: java.lang.NullPointerException
And finally our Spring beans.
Error formatting macro: snippet: java.lang.NullPointerException