Problem with ORM by Weblogic

[thomas2004ch]

Hi all,

I create an EJB-Project which runs quite well in JBoss. Now I am going to deploy it by Weblogic Express 10g. But I have problem by deploying. I got Exception as follow:

Error processing persitence unit dwSpring2Jpa of module TestBEAEJB3Beans.jar: Error looking up a DataSource for PersistenceUnit dwSpring2Jpa: javax.naming.NameNotFoundException: Unable to resolve 'OracleDS'. Resolved ''; remaining name 'OracleDS'

My "persistence.xml" looks as follow:

<?xml version="1.0"?>
<persistence xmlns="

http://java.sun.com/xml/ns/persistence"

xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://java.sun.com/xml/ns/persistence

http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"

version="1.0">
<persistence-unit name="dwSpring2Jpa">
<jta-data-source>OracleDS</jta-data-source>
<properties>
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
</properties>
</persistence-unit>
</persistence>


My question: where should I locate the datasource descriptor which contains the OracleDS and the username and password?