Question

I’ve used eclipselink in a web project in NetBeans. It works nice and easy. How can I do the same in a project unrelated to the web (console application)?

In my web application I have:

@PersistenceUnit
EntityManagerFactory enf;

Which instantiates enf. This does not work in a console application.

Answer 1

In case of an Web or an application container, the container injects the EntityManagerFactory when the @PersistenceUnit annotation is called. This will not hold good for a console application.

The possible ways for achieving this are

1. To include Spring (which does the same job as your web container). Please refer to the tutorial Getting Started With JPA in Spring 2.0

Or

2. To write the initiation code yourself as follows.

   EntityManagerFactory emf = Persistence.createEntityManagerFactory("PersistenceUnitName");