Persistence unit dependency failure on deploy

[mtuckah]

Hello,

I have an ejb3 application packaged in the following way:

myapp.ear
|---application.xml
|---myentities.jar
 |---META-INF/persistence.xml
 |---(entity beans)
|---mysessions.jar
 |---MySessionBean.java

My persistence.xml looks like this:

<persistence>
 <persistence-unit name="myUnit">
 <jta-data-source>java:/MyDS</jta-data-source>
 <properties>
 <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
 <property name="hibernate.hbm2ddl.auto" value="validate"/>
 <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
 <property name="hibernate.transaction.flush_before_completion" value="true"/>
 <property name="hibernate.show_sql" value="false"/>
 <property name="jboss.entity.manager.factory.jndi.name" value="java:/MyFactory"/>
 <property name="jboss.entity.manager.jndi.name" value="java:/EntityManager/myUnit"/>
 </properties>
 </persistence-unit>
</persistence>

Mu application.xml looks like this:

<application>
 <display-name>My App</display-name>

 <module>
 <ejb>myentities.jar</ejb>
 </module>

 <module>
 <ejb>mysessions.jar</ejb>
 </module>
</application>

In MySession, I'm attempting to inject an EntityManager like so:

@PersistenceContext(unitName = "myUnit")
private EntityManager em;

For session beans that exist within the same JAR that contains the persistence.xml, this injection works fine. However for session beans within mysessions.jar, I get the following exception on deploy:

--- MBeans waiting for other MBeans ---
ObjectName: jboss.j2ee:ear=myapp.ear,jar=mysessions.jar,name=MySessionBean,service=EJB3
State: NOTYETINSTALLED
I Depend On:
persistence.units:unitName=myUnit

--- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM ---
ObjectName: persistence.units:unitName=myUnit
State: NOTYETINSTALLED
Depends On Me:
jboss.j2ee:ear=myapp.ear,jar=mysessions.jar,name=MySessionBean,service=EJB3

I've seen posts with similar problems but no clear cut solutions. Is my packaging correct? Should JARs within the same EAR be able to reference persistence units in other JARs? Any help would be greatly appreciated.

[scotttam]

I am not sure if this works or not as I have not tried it myself but according to the Burke EJB 3.0 book, you can add the <jar-file> element to the persistence.xml that will scan additional jar files for classes to add to the persistence set.

If you have the book, see page 70.

I'll be curious to whether it works myself.

Scott

[mtuckah]

Hey Scott,

That approach works but only if you have a second persistence.xml in mysessions.jar/META-INF which references myentities.jar AND if you give the persistence unit a different name. So each component in your app would be using different unitName's when injecting their entity managers.

That doesn't seem right to me.

[mtuckah]

Oh yeah...and I had to specify the absolute path to myentities.jar in the <jar-file> element because when I specify by relative path, it does weird things to it. For example, if I reference it thusly:

<jar-file>../myentities.jar</jar-file>

I get an error saying it can't find "mysessions.jar/myentities.jar"

So, I then tried

<jar-file>../../myentities.jar</jar-file>

And I got an error saying it can't find "mysessions.jar/yentities.jar" (note the missing 'm'). Weird...

[jc7442]

I've got nearly the same thing except that I declare my jar as java not as ejb in the application.xml.

<module>
 <java>services-1.0-SNAPSHOT.jar</java>
 </module>
 <module>
 <java>entities-1.0-SNAPSHOT.jar</java>
 </module>
 <module>
 <java>to-1.0-SNAPSHOT.jar</java>
 </module>

In my case it orks fine.

[tranquillizer]

Did you find a solution to this?

Struggeling with the same problem trying to inject the Entitymanager in the business.jar from the weblib.jar...

[jaikiran]

You will have to provide more information about your application and its packaging. Which version of JBoss and Java are you using? And what is business.jar and weblib.jar? Do you see any exceptions, if yes then post the entire exception stacktrace

[deanouk]

Did you ever resolove this problem? Having similar issues.

[sgatl2]

Were you able to get rid of the problem. I am facing it too.. No help is found online yet.