Sunday, March 4, 2007

EJB 3.0 + Glassfish + JPA + Eclipse

Follow instructions here to create the EJB project in eclipse.

http://www.webagesolutions.com/knowledgebase/javakb/jkb005/index.html

Create the jdbc connection pool and the corresponding resource via the GlassFish admin console.

Now create a persistence.xml fiel in the src/META-INF folder in your project to point to the JDBC resource.

<persistence>
<persistence-unit name=\"myPU\">
<jta-data-source>jdbc/MyDB</jta-data-source>
<properties>
<property name=\"toplink.logging.level\" value=\"FINEST\" />
</properties>
</persistence-unit>
</persistence>

In the bean implementation class use

@PersistenceContext(unitName = "myPU")
protected EntityManager em;

to inject the EntityManager. Change the unitName value to your persistence definition in the persistence.xml.

The exported jar file can be deployed into either the local or a remote glassfish instance.

Stay tuned for the next post on writing a standalone client to access this ejb.

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