@PersistenceContext injection from a different jar fails

[nouredine13]

Hello,

I have a sample application with an EJB3 SLSB which is being injected with a PersistenceContext which is configured in a different jar file as follows :

package org.myapp.ejb.impl;

import javax.ejb.Local;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.myapp.ejb.AppManager;

@Stateless
@Local ({AppManager.class})
public class AppManagerBean implements AppManager {

@PersistenceContext (unitName="myapp_ejb3.jar#MyPU")
private EntityManager em;

public String getVersion() {
System.out.println("EM is " + em);
return "1.0";
}


}


The application is deployed as an EAR file in the following structure:

EJB3Persistence.ear
|
|--- META-INF
| |
| |----application.xml
| |

|--- myapp_ejb3.jar (contains the persistence.xml)
| |
| |--- META-INF
| | |
| | |--- persistence.xml
|
|
|
|--- another_ejb3.jar (contains the SLSB)
| |
| |
| |--- META-INF
| |
| |--- org.myapp.ejb.impl.AppManagerBean


Note that this application is deployed fine in JBoss-5.0.0.Beta4,

but with 5.0.0.CR2 the deployment fails.

Part of the exception is pasted below:

Caused by: java.lang.IllegalArgumentException: Can't find a deployment unit named myapp_ejb3.jar at AbstractVFSDeploymentContext@25710991{vfszip:/product/jboss/jboss-5.0.0.CR2/server/default/deploy/EJB3Persistence.ear/another_ejb3.jar}
at org.jboss.jpa.resolvers.DefaultPersistenceUnitDependencyResolver.getDeploymentUnit(DefaultPersistenceUnitDependencyResolver.java:106)
at org.jboss.jpa.resolvers.DefaultPersistenceUnitDependencyResolver.resolvePersistenceUnitSupplier(DefaultPersistenceUnitDependencyResolver.java:131)
at org.jboss.ejb3.Ejb3Deployment.resolvePersistenceUnitSupplier(Ejb3Deployment.java:841)
at org.jboss.ejb3.EJBContainer.resolvePersistenceUnitSupplier(EJBContainer.java:1399)
at org.jboss.injection.PersistenceUnitHandler.addPUDependency(PersistenceUnitHandler.java:124)
at org.jboss.injection.PersistenceContextHandler.loadXml(PersistenceContextHandler.java:76)
at org.jboss.ejb3.EJBContainer.processMetadata(EJBContainer.java:570)
at org.jboss.ejb3.Ejb3Deployment.processEJBContainerMetadata(Ejb3Deployment.java:439)
at org.jboss.ejb3.Ejb3Deployment.start(Ejb3Deployment.java:552)
at org.jboss.ejb3.deployers.Ejb3Deployer.deploy(Ejb3Deployer.java:202)
... 28 more


I found the same bug here : http://www.jboss.com/index.html?module=bb&op=viewtopic&t=146052

I applied the solution he suggested : jboss-JPA-deployers-1.0.0.Beta4, but this do not solve the problem!

if someone has an idea?

Thank's a lot.

[nouredine13]

I think this is a bug :
see https://jira.jboss.org/jira/browse/JBAS-6229

but there is some workaround?

thank's.

[alrubinger]

Yes, that's the issue.

The workaround is repackaging. I recommend either updating to AS trunk or holding tight until AS5 GA.

S,
ALR

[alrubinger]

Also, please do not cross-post.

Reference to other discussion:
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4192112

(Which belongs in the EJB3 User Forum or here, not Design of EJB3).

S,
ALR

[nouredine13]

Hello,

I posted the message in several places, because I did not know what is the most appropriate place.

Thank you for your answer and for your understanding.

Best regard's

[nouredine13]

Hello again,

i have find a workaround to this pblm by making a lookup to the globale JNDI name of Persistance Context :

see here : http://docs.jboss.org/ejb3/app-server/reference/build/reference/en/html/entityconfig.html#d0e193

S,

[jaikiran]

"Nouredine13" wrote:
Hello again,

i have find a workaround to this pblm by making a lookup to the globale JNDI name of Persistance Context :

see here : http://docs.jboss.org/ejb3/app-server/reference/build/reference/en/html/entityconfig.html#d0e193

S,

I was going to recommend that earlier, but i remember that it no longer works in JBoss-5 CR2. It's strange that you got it working in CR2.

[nouredine13]

it does not work yet, beacause the deployment of my EAR fails with NullPointerException, and i dont understand what's happen!

i think i will try the EJB3Plugin to patch Jboss5 AS CR2.

S,

[alrubinger]

"Nouredine13" wrote:
i think i will try the EJB3Plugin to patch Jboss5 AS CR2.

You'll have to patch a build from trunk.

S,
ALR

[nouredine13]

Hello,

I found a workaround to the problem of referencing persistence Unit :
- Create a new persistence.xml for the jar which make reference to another PersistenceContext and adding the <jar-file> tag that specifies the jar wich contain the target persistence unit to inject.
- the value of the unitName tag in persistence.xml must be the same as that declared in the targeted one.
- finaly inject a PersistenceContext :

@PersistenceContext(unitName=....)
EntityManager em;

For the NullPointerException problem:
- specify explicitly the name attribute to @EJB local injection should be the same as it's declared with @Stateless(name=...)
- add @IgnoreDependency annotation to avoid circular dependency problem.

I have successfully deployed my EAR with JBoss 5 CR2.
S,

Nouredine