There's a really simple jpa sample in the testsuite. If you check
out the geronimo source it will be under
testsuite/enterprise-testsuite/jpa-tests/
Hope this helps
david jencks
On Sep 4, 2007, at 5:08 PM, Xh wrote:
Hi All!
I'm trying to create my first ejb3 entity bean in Geronimo 2.0.1.
I base on this wiki:
http://cwiki.apache.org/GMOxDOC20/very-simple-entity-ejb-example.html
I've created simple WebModule and annoted it, just like this:
@Entity
@Table(name="dw_module",schema="dw")
public class WebModule implements Serializable {
...
}
Acording to the above wiki openejb-jar.xml is only to define module
and artifactId, so do mine.
In addition, I have META-INF/persistance.xml that looks like this:
<?xml version="1.0" encoding="UTF-8"?>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
version="1.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd";>
<persistence-unit name="WebModulePU">
<provider>
org.apache.openjpa.persistence.PersistenceProviderImpl
</provider>
<class>org.xh.dataweaver2.web.entity.WebModule</class>
<properties>
<property name="openjpa.ConnectionURL"
value="jdbc:derby:target/dataweaver" />
<property name="openjpa.ConnectionUserName" value="dw" />
<property name="openjpa.ConnectionPassword"
value="admin123" />
<property name="openjpa.ConnectionDriverName"
value="org.apache.derby.jdbc.EmbeddedDriver" />
</properties>
</persistence-unit>
</persistence>
Later on, in my Servlet I have:
// thread-safe, class level context
@PersistenceContext(unitName = "WebModulePU", name = "persistence/em")
public class DispatcherServlet extends HttpServlet implements
Servlet {
...
EntityManager em = null;
try {
em = (EntityManager) (new InitialContext())
.lookup("java:comp/env/persistence/em");
} catch (NamingException e) {
e.printStackTrace();
}
...
}
The thing is that my application deploys and starts without any
errors.
But I cannot see my entity bean in the JNDI Viewer;
as a result, when I access my Servlet I keep getting:
javax.naming.NotContextException: persistence/em
Can some one provide an example of working entity bean and its
persistance.xml?
thanks and best regards
Łukasz
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