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From "Donald Woods (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (OPENJPA-1491) org.apache.openjpa.kernel.Bootstrap uses the application classloader to load OpenJPA internals
Date Mon, 14 Jun 2010 14:47:15 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-1491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12878596#action_12878596
] 

Donald Woods edited comment on OPENJPA-1491 at 6/14/10 10:46 AM:
-----------------------------------------------------------------

This fix only applies to OSGi environments where Apache Aries JPA 0.1-incubating is being
used.
Are you trying to run OpenJPA as an OSGi bundle?  If so, are you using Apache Aries in a custom
assembly or the latest Apache Geronimo 3.0-SNAPSHOT builds?

To be more specific - OpenJPA does not include support for the OSGi Enterprise Specification
r4 v4.2 section 127 JPA Service Specification, but relies on Apache Aries JPA (http://incubator.apache.org/aries/jpaproject.html)
which wrappers OpenJPA to deliver that support.

      was (Author: drwoods):
    This fix only applies to OSGi environments where Apache Aries JPA 0.1-incubating is being
used.
Are you trying to run OpenJPA as an OSGi bundle?  If so, are you using Apache Aries in a custom
assembly or the latest Apache Geronimo 3.0-SNAPSHOT builds?

  
> org.apache.openjpa.kernel.Bootstrap uses the application classloader to load OpenJPA
internals
> ----------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-1491
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1491
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: osgi
>    Affects Versions: 2.0.0-beta
>         Environment: OSGi
>            Reporter: Timothy Ward
>            Assignee: Donald Woods
>             Fix For: 2.0.0-beta3
>
>         Attachments: OPENJPA-1491-trunk.patch
>
>
> When attempting to create an EntityManagerFactory in an OSGi environment the org.apache.openjpa.kernel.Bootstrap
class attempts to instantiate a BrokerFactory using reflection. When the Bootstrap class attempts
to load this class it only ever uses the ClassLoader passed in by the PersistenceUnitInfo.
This means that the default broker (contained within OpenJPA) can never be loaded. The client
bundle should not have to import the internals of OpenJPA to make this work, so OpenJPA should
attempt to load the class using its own bundle classloader. This is the expected behaviour
for an OSGi bundle.
> Additionally, the implementation uses Class.forName() which should be used carefully
in an OSGi envrionment (to see why read http://blog.bjhargrave.com/2007/09/classforname-caches-defined-class-in.html
). It should be fine here because the variant that takes a ClassLoader is used.
> The following exception is generated when OpenJPA attempts to use the application classloader
to load an internal class.
> <openjpa-2.0.0-SNAPSHOT-r422266:905001 fatal user error> org.apache.openjpa.persistence.ArgumentException:
Could not invoke the static newInstance method on the named factory class "<<openjpa-2.0.0-SNAPSHOT-r422266:905001
fatal user error> org.apache.openjpa.util.UserException: The named BrokerFactory "org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory"
is not valid.>".
> 	at org.apache.openjpa.kernel.Bootstrap.newBrokerFactory(Bootstrap.java:70)
> 	at org.apache.openjpa.persistence.PersistenceProviderImpl.getBrokerFactory(PersistenceProviderImpl.java:145)
> 	at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:180)
> 	at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:62)
> 	at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.createEntityManagerFactories(EntityManagerFactoryManager.java:227)
> 	at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.bundleStateChange(EntityManagerFactoryManager.java:121)
> 	at org.apache.aries.jpa.container.impl.PersistenceBundleManager.modifiedBundle(PersistenceBundleManager.java:197)
> 	at org.apache.aries.util.tracker.MultiBundleTracker$InternalBundleTracker.modifiedBundle(MultiBundleTracker.java:108)
> 	at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:453)
> 	at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:237)
> 	at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:413)
> 	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:916)
> 	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:220)
> 	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
> 	at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEventPrivileged(Framework.java:1350)
> 	at org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1301)
> 	at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:490)
> 	at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:546)
> 	at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1098)
> 	at org.eclipse.osgi.framework.internal.core.PackageAdminImpl.suspendBundle(PackageAdminImpl.java:314)
> 	at org.eclipse.osgi.framework.internal.core.PackageAdminImpl.processDelta(PackageAdminImpl.java:460)
> 	at org.eclipse.osgi.framework.internal.core.PackageAdminImpl.doResolveBundles(PackageAdminImpl.java:241)
> 	at org.eclipse.osgi.framework.internal.core.PackageAdminImpl$1.run(PackageAdminImpl.java:176)
> 	at java.lang.Thread.run(Thread.java:735)
> Caused by: <openjpa-2.0.0-SNAPSHOT-r422266:905001 fatal user error> org.apache.openjpa.persistence.ArgumentException:
The named BrokerFactory "org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory" is not valid.
> 	at org.apache.openjpa.kernel.Bootstrap.getFactoryClass(Bootstrap.java:159)
> 	at org.apache.openjpa.kernel.Bootstrap.invokeFactory(Bootstrap.java:111)
> 	at org.apache.openjpa.kernel.Bootstrap.newBrokerFactory(Bootstrap.java:62)
> 	... 23 more
> Caused by: java.lang.ClassNotFoundException: org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory
> 	at java.lang.Class.forName(Class.java:169)
> 	at org.apache.openjpa.kernel.Bootstrap.getFactoryClass(Bootstrap.java:157)
> 	... 25 more

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