[jboss-dev-forums] [JBoss AS7 Development] - PersistenceContext injection from a different jar

[guinotphil]

guinotphil [http://community.jboss.org/people/guinotphil] created the discussion

"PersistenceContext injection from a different jar"

To view the discussion, visit: http://community.jboss.org/message/619188#619188

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Hi,

I'm trying to deploy an application with many EJB/WAR modules.

One of them defines the persistence entities, as well as the *persistence.xml* file:

<?xml version="1.0" encoding="UTF-8"?>
<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_2_0.xsd"
             version="2.0">
<persistence-unit name="entityManagerFactory" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:jboss/datasources/OracleDS</jta-data-source>
    <properties>
        <property name="jboss.as.jpa.providerModule" value="org.hibernate3"/>
...
...
...

    </properties>
</persistence-unit>

Then, in other modules, I've got to refer the entityManagerFactory. But,it gives me the following error:

Can't find a deployment unit named entityManagerFactory at subdeployment "EJB_Module.jar" of deployment "EAR_Project.ear"

I've tryied to replace 
@PersistenceContext(unitName="entityManagerFactory")
by
@PersistenceContext(unitName="EJB_DBModule.jar#entityManagerFactory")
or
@PersistenceContext(unitName="../EJB_DBModule.jar#entityManagerFactory")

But, I still get the same error.



I've tried the workaround mentionned here :  http://community.jboss.org/thread/2111 http://community.jboss.org/thread/2111 and created in each module a *persistence.xml* file which refers the entities jar file :

<?xml version="1.0" encoding="UTF-8" ?>
<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_2_0.xsd"
             version="2.0">
   <persistence-unit name="entityManagerFactory">
     <jar-file>EJB_DBModule.jar</jar-file>
   </persistence-unit>
</persistence>

But, it actually doesn't seem to load configuration from the jar file and so doesn't connect me to the database:

org.hibernate.HibernateException: 'hibernate.dialect' must be set when no Connection available


How can I share my entity manager between all the modules ? Should I duplicate all the configuration from *persistence.xml* in every module ?

Thank you very much
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