Hi all
In digging around for some more info on this issue I came across the
java.net Glassfish forum. Is that a better place to ask questions like
mine below?
After seeing the posts on the persistence_at_glassfish.dev.java.net list
over the last few days, I'm getting the impression that this is intended
more as an internal list for the developers on the project. Sorry about
that. I'll ask future questions over on the Glassfish forum.
Incidentally, I'm using build v2-b21. I did find some similar
references to my problem in the Glassfish forum, and references to an
issue #713 so I'll do some more reading around that. However, I don't
quite see how this can work given the nature of the URL returned by
Eclipse. Maybe if I jar'd up the code it would work. Normally, when
developing/debugging plug-ins in Eclipse the plug-in code is not jar'd.
Thanks
Martin
Martin Bayly wrote:
> Hi
>
> I've been trying to use the TopLink essentials JPA implementation in
> an Eclipse Rich Client Platform application but I get the exception
> below when I try and create an EntityManagerFactory.
>
> It seems that this is because the Eclipse plug-in environment
> classloaders create URLs of the following form:
>
> bundleresource://3/META-INF/persistence.xml
>
> For example the above URL would be returned by a call to:
>
> ClassLoader loader = Thread.currentThread().getContextClassLoader();
> Enumeration<URL> resources =
> loader.getResources("META-INF/persistence.xml");
>
> There is code in PersistenceUnitProcessor that is using the context
> class loader in this way to find resources for the persistence units
> and this fails with the exception below because it is seems like it is
> only expecting URLs with a file or jar protocol.
>
> [Out of interest the Hibernate JPA implementation seems to handle this
> okay]
>
> Would you consider this a bug, or is it possible I'm doing something
> wrong?
>
> Thanks
> Martin
>
> Exception:
>
> java.lang.NullPointerException
> at
> oracle.toplink.essentials.ejb.cmp3.persistence.ArchiveFactoryImpl.createArchive(ArchiveFactoryImpl.java:64)
>
> at
> oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.findPersistenceArchives(PersistenceUnitProcessor.java:207)
>
> at
> oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.findPersistenceArchives(PersistenceUnitProcessor.java:190)
>
> at
> oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:239)
>
> at
> oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initializeFromMain(JavaSECMPInitializer.java:278)
>
> at
> oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.getJavaSECMPInitializer(JavaSECMPInitializer.java:81)
>
> at
> oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:118)
>
> at
> javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
>
> at
> javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
>
> at
> testjpaplugintoplink.View$ViewContentProvider.getElements(View.java:77)
> at
> org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:927)
>
> at
> org.eclipse.jface.viewers.TableViewer.getRawChildren(TableViewer.java:1279)
>
> at
> org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:868)
>
> at
> org.eclipse.jface.viewers.StructuredViewer.getSortedChildren(StructuredViewer.java:984)
>
> at
> org.eclipse.jface.viewers.TableViewer.internalRefreshAll(TableViewer.java:870)
>
> at
> org.eclipse.jface.viewers.TableViewer.internalRefresh(TableViewer.java:818)
>
> at
> org.eclipse.jface.viewers.TableViewer.internalRefresh(TableViewer.java:807)
>
> at
> org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1388)
>
> at
> org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1323)
>
> at
> org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1386)
>
> at
> org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1345)
>
> at
> org.eclipse.jface.viewers.TableViewer.inputChanged(TableViewer.java:767)
> at
> org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:250)
> at
> org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1542)
>
> at testjpaplugintoplink.View.createPartControl(View.java:189)
> at
> org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:332)
>
> at
> org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:197)
> at
> org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:566)
>
> at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:290)
> at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:525)
> at
> org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:140)
>
> at
> org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
>
> at
> org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
>
> at
> org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:394)
>
> at
> org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1144)
>
> at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1097)
> at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1311)
> at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:601)
> at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:532)
> at
> org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:562)
>
> at
> org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:244)
>
> at
> org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:815)
> at
> org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2429)
> at
> org.eclipse.ui.internal.WorkbenchWindow$6.run(WorkbenchWindow.java:2616)
> at
> org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
> at
> org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2597)
>
> at
> org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.java:658)
>
> at
> org.eclipse.ui.internal.Workbench.busyOpenWorkbenchWindow(Workbench.java:795)
>
> at
> org.eclipse.ui.internal.Workbench.doOpenFirstTimeWindow(Workbench.java:1437)
>
> at
> org.eclipse.ui.internal.Workbench.openFirstTimeWindow(Workbench.java:1388)
>
> at
> org.eclipse.ui.internal.WorkbenchConfigurer.openFirstTimeWindow(WorkbenchConfigurer.java:190)
>
> at
> org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:708)
>
> at org.eclipse.ui.internal.Workbench.init(Workbench.java:1085)
> at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1847)
> at
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
>
> at
> org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
> at testjpaplugintoplink.Application.run(Application.java:18)
> at
> org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
>
> at
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
>
> at
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
>
> at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
>
> at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
> at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
> at org.eclipse.core.launcher.Main.run(Main.java:977)
> at org.eclipse.core.launcher.Main.main(Main.java:952)
>