[jboss-user] [EJB 3.0] - Updating EntityManagerFactory

[cmlopezalv]

Greetings,

My application is creating entity beans dynamically, so, when i create i new entity bean i must update the Ejb3Configuration to let it know there is a new bean, i make this using the method 'addAnnotatedClass(Class clazz)' and 'buildMappings()'.  

I have several EntityManagerFactory, created using the clas Ejb3Configuration , using the method (createEntityManagerFactory()).

The problem is how to update the EntityManagerFactory that has been already created, before the update of the Ejb3Copnfiguration.

If i want to do it, i have to create a new EntityManagerFactory from the Ejb3Configuration updated.

Example:

Ejb3Configuration ejb3Configuration = new Ejb3Configuration();
Properties p = new Properties();
//Config properties .......
ejb3Configuration.addProperties(p);
//add some entities
ejbConfiguration.addAnnotatedClass(Entity1.class);
ejbConfiguration.addAnnotatedClass(Entity2.class);
//Create the factory
EntityManagerFactory factory = ejbConfiguration.createEntityManagerFactory();
.....
.....
.....
Then in some point my application needs to know about a new entity bean
so i add it to the configuration i've been using:

ejbConfiguration.addAnnotatedClass(EntityBean3.class);

EntityManager entityManager = factory.createEntityManagerFactory();
//Use this EntityManager to persist the new entity
entityManager.persist([instance of EntityBean3]);

In this point i got the error: EntityBean3 not mapped, that is because the factory is not  synchronized with the Ejb3Configuration.

How can i make this sync ?.   I'm working creating a new EntityManagerFactory everytime the application generates a new entity bean, but i think that is really ugly, not to mention the performance problems for the application.


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