Weblogic 10.3.0 not picking up persistence unit

Question

Hello,
I am facing a problem where Weblogic does not seem to pickup the persistence unit:
[wldeploy] Target state: deploy failed on Server examplesServer
[wldeploy] java.lang.IllegalArgumentException: No persistence unit named 'dao' is available in scope ejb-app. Available persistence units: []OS: Windows XP (Development Environemnt)
WebLogic Server Version: 10.3.0.0
Though I'm working via Eclipse Helios, I am using Weblogic generated (and later modified) Ant scripts to compile, build and deploy to my local Weblogic install, in a 'split development' setup.
Following is the file strutcture:
source
+---build.xml (Ant script)
+---APP-INF
|    +---lib
|         +--- * (shared libraries)
|
+---META-INF
|    +---application.xml
|    +---weblogic-application.xml
|
+---web-app
|    +---WEB-INF
|         +---src
|         +---lib
|
+---ejb-app
     +---com.example.ejb.data (Contains Entity annotations)
      |    +---Pojo1.java
      |    +---Pojo2.java
      |
      +---com.example.ejb.ctrl (Contains business logic and services)
      |    +---MyService.java
      |
      +---META-INF
           +---ejb-jar.xml
            +---weblogic-ejb-jar.xml
            +---persistence.xml     Here is my persistence.xml:
<?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="dao" transaction-type="RESOURCE_LOCAL">
          <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
          <jta-data-source>OraDS</jta-data-source>
          <non-jta-data-source>OraDS</non-jta-data-source>
          <class>com.example.ejb.data.Pojo1</class>
          <class>com.example.ejb.data.Pojo2</class>
          <properties>
               <property name="eclipselink.target-server" value="WebLogic_10" />
               <property name="eclipselink.logging.level" value="FINEST" />
          </properties>
     </persistence-unit>
</persistence>            I am attempting to inject the persistence unit via annotation in MyService.java (a @Stateless session bean):
@PersistenceContext(unitName = "dao")
private EntityManager entityManager;     I had done the same with 10.3.0's default Kodo provider and was getting the same issue.
I've moved the persistence.xml to source/APP-INF, source/APP-INF/lib, source/META-INF and run deploys, it still gives me the error.
The whole EAR is built with wlcompile and appc as per Split Directory development flow.
For some reason, Weblogic does not seem to pick up the "dao" persistence unit into its JNDI tree, application wide or 'ejb-app' module scoped.
Any direction on what next should I be looking at would be helpful.
Edited by: Vyoma on May 25, 2011 10:15 PM
Fixed code formatting.

Answer 1

Pierluigi Vernetto, thanks for that link. Though it was for a web module consumption of the persistence package, I was able to adapt it for use by my ejb module.
Here is my solution, under split-directory development workflow.
Create the persistence module, place the persistence.xml in that module's META-INF.
Create an Ant task in the build.xml to 'wlcompile' and JAR it to the EAR direcotries APP-INF/lib directory.
Exclude the persistence module from the rest of the 'wlcompile' and 'appc' tasks.
I was then able to inject it with annotation in my EJB module.
dvohra16, thanks for that pointer. Now that I've been able to solve, the pressure is off (and shifted to other things). But I will surely check your option out. If I can get that working, it will be much easier than tinkering around with the build.xml and would be the normal flow of split-directory development workflow.
As of now, I will say this thread as 'solved', but if I get it working the way you mention (on my sandbox project), I will surely come back and update this thread.
Edited by: Vyoma on May 27, 2011 11:21 AM