JPA with mulitple jars

jefmsmit · **Joined:** Mon Dec 12, 2005 6:00 pm **Posts:** 11

I'm trying to build a series of modules that any web-app based on JPA can share. I have one jar that contains a base class for all of my domain objects (among other useful things). I have another jar file that contains things like users, groups and roles. I figure most web-apps will need these. Then I'd like the web apps themselves to be able to define their domain objects. I can get all of this working, but I'm not crazy about the configuration. I have to put each class, including those defined in the aforementioned jars in a <class> stanza in my persistence.xml. Is there any way around this? I can guarantee that every time I add a new domain object I will forget to put it in persistence.xml. This is the type of configuration I'd like to avoid by building these modules in the first place. Anyone have any suggestions?

-jeff

emmanuel · **Posted:** Wed Mar 07, 2007 8:28 pm

use <jar-file> to point to the appropriate jar, the entities will be discovered

zjsun · **Joined:** Wed Jan 23, 2008 9:11 pm **Posts:** 2

emmanuel wrote:

use <jar-file> to point to the appropriate jar, the entities will be discovered

in a war, how to use a relative path in <jar-file>?

marvinsouza · **Joined:** Wed Oct 24, 2007 2:39 pm **Posts:** 7

I have the same scenario.
I try this:

Code:

   <persistence-unit name="entityManager" transaction-type="JTA">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>jdbc/dbsm</jta-data-source>
<jar-file>MyEJBApp.jar</jar-file>
<jar-file>MyBaseJar.jar</jar-file>
      <properties>
         <property name="hibernate.ejb.cfgfile" value="/META-INF/hibernate.cfg.xml"/>
      </properties>
   </persistence-unit>

But didn't works :(
Any help ?