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From "Viet Nguyen" <vhng...@gmail.com>
Subject Re: Geronimo 2.0.1 and entity bean problem
Date Wed, 05 Sep 2007 00:36:59 GMT
On 9/4/07, Xh <xhsaymyname@yahoo.co.uk> 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();
>         }
> ...
> }


have you tried
@PersistenceContext(unitName="WebModulePU")
EntityManager em = null;

I think that should inject the WebModulePU into em.

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
> Ɓukasz


Also, just in case, is your persistence.xml named 'persistence.xml' and not
'persistance.xml'?

--Viet

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