Hi Chan,
In the latest release I believe you can lookup the EntityManager using the
java:openejb context. For example for the movie-unit persistence unit in the
injection-of-entitymanager sample you could use:
context.lookup("java:openejb/PersistenceUnit/movie-unit");
to lookup the EntityManagerFactory. I tend to use some code like this to dig
around the java:openejb context to see what goodies are there:
NamingEnumeration list = ctx.listBindings("java:openejb");
while (list.hasMore()) {
Binding item = (Binding) list.next();
String className = item.getClassName();
String name = item.getName();
System.out.println(className + " " + name);
}
I tried this using an embedded instance of OpenEJB, but I would imagine it
would work in Tomcat as well.
Hope that helps,
Jon
On Tue, Jul 28, 2009 at 9:44 PM, Chan Kelwin Hillary <[email protected]>wrote:
> Hi,
> I have a stateless EJB Session bean that successfully instantiates the
> EntityManger using the @PersistenceContext annotation. However, due to an
> issue, I need to get the EntityManager by lookup instead. I've tried the
> code below in the stateless session bean but it is giving me the error
> "Name
> Persistence is not bound in this Context". I've also placed
> the eclipselink.jar file into the %TOMCAT%\lib directory.
>
> try {
> Context context = new InitialContext();
> em = (javax.persistence.EntityManager) context.lookup("Persistence");
> } catch (NamingException e) {
> System.out.println(e.getExplanation());
> }
>
> persistence.xml
> ===================
> <?xml version="1.0" encoding="windows-1252" ?>
> <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" xmlns="http://java.sun.com/xml/ns/persistence";>
> <persistence-unit name="Persistence">
> <provider>
> org.eclipse.persistence.jpa.PersistenceProvider
> </provider>
> <jta-data-source>
> java:openejb/Connector/Default JDBC Database
> </jta-data-source>
> <class>
> com.testejb.model.ejb.dn.Dept
> </class>
> <properties>
> <property name="eclipselink.target-database" value="Oracle10g"/>
> </properties>
> </persistence-unit>
> </persistence>
>
> I am running this on Tomcat-6.0.20 (extracted from the zip file instead of
> the executable) and the embedded OpenEJB. Can this be done? What am I
> missing?
>
> Thanks.
>
>
> --
> Best regards,
>
> Chan Kelwin
>
