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Re: [p2-dev] Reuse of P2 UI

Hi, Eugen.
Those NPE's indicate that the basic provisioning services have not been initialized properly. The event bus and the profile registry are not being found.
A common cause for this is the absence of the declarative services bundle in the launch config (or in the build). Without ds, the basic provisioning service declarations won't be found.
We have tried to include more reasonable error messages for the common trigger points of this problem, but depending on how you are reusing p2, your symptoms may be different (such as here).

Here is an old thread discussing this problem.
http://www.mail-archive.com/equinox-dev@xxxxxxxxxxx/msg03599.html

Let me know if this is not what's causing your issue.

susan

Inactive hide details for Eugen Reiswich ---11/05/2010 01:24:27 AM---Hi folks, I'm trying to reuse some P2 UI elements as introEugen Reiswich ---11/05/2010 01:24:27 AM---Hi folks, I'm trying to reuse some P2 UI elements as introduced in this presentation:



          Eugen Reiswich <ereiswich@xxxxxxxxxxxxxx>
          Sent by: p2-dev-bounces@xxxxxxxxxxx

          11/05/2010 01:23 AM
          Please respond to P2 developer discussions



To: P2 developer discussions <p2-dev@xxxxxxxxxxx>
cc:
Subject: [p2-dev] Reuse of P2 UI


Hi folks,

I'm trying to reuse some P2 UI elements as introduced in this presentation: http://www.slideshare.net/PascalRapicault/discovering-the-p2-api

Basically I would like to reuse the"Available Software"-page where I can choose/edit update sites and features to install, the "Install Details"-page which summarizes the items to be installed and the licenses page. I would like to integrate all this pages in my RCP-View, not in a Wizard.

Trying to reuse the "InstalledSoftware"-page resulted in a NPE (note: I've checked the box "Support software installation in the launch application" in my launch configuration):
InstalledSoftwarePage installedSoftwarePage = new InstalledSoftwarePage();
installedSoftwarePage.createControl(parent);

!ENTRY org.eclipse.core.jobs 4 2 2010-11-05 09:15:34.160
!MESSAGE An internal error occurred during: "Fetching children of _SELF_".
!STACK 0
java.lang.NullPointerException
at org.eclipse.equinox.internal.p2.ui.model.ProfileElement.getQueryable(ProfileElement.java:55)
at org.eclipse.equinox.internal.p2.ui.QueryProvider.getQueryDescriptor(QueryProvider.java:54)
at org.eclipse.equinox.internal.p2.ui.model.QueriedElement.fetchChildren(QueriedElement.java:102)
at org.eclipse.equinox.internal.p2.ui.model.RemoteQueriedElement.fetchDeferredChildren(RemoteQueriedElement.java:34)
at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:235)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!ENTRY org.eclipse.ui.workbench 4 0 2010-11-05 09:15:34.177
!MESSAGE Unable to create view ID P2UIExamples.view: An unexpected exception was thrown.
!STACK 0
java.lang.NullPointerException
at org.eclipse.equinox.internal.p2.ui.ProvUIActivator.addProvisioningListener(ProvUIActivator.java:106)
at org.eclipse.equinox.internal.p2.ui.dialogs.InstalledIUGroup.createViewer(InstalledIUGroup.java:75)
at org.eclipse.equinox.internal.p2.ui.dialogs.StructuredIUGroup.createGroupComposite(StructuredIUGroup.java:80)
at org.eclipse.equinox.internal.p2.ui.dialogs.InstalledIUGroup.<init>(InstalledIUGroup.java:51)
at org.eclipse.equinox.p2.ui.InstalledSoftwarePage.createControl(InstalledSoftwarePage.java:95)
at p2uiexamples.View.createPartControl(View.java:76)
at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:375)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:229)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:529)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1254)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1207)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1606)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:647)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:574)
at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568)
at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:272)
at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:981)
at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2632)
at org.eclipse.ui.internal.WorkbenchWindow$27.run(WorkbenchWindow.java:2986)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2967)
at org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.java:771)
at org.eclipse.ui.internal.Workbench$23.runWithException(Workbench.java:1221)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3586)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3279)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$31.runWithException(Workbench.java:1567)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:179)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4233)
at org.eclipse.ui.internal.StartupThreading.runWithoutExceptions(StartupThreading.java:94)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1562)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2567)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at p2uiexamples.Application.start(Application.java:20)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
at org.eclipse.equinox.launcher.Main.main(Main.java:1383)

Any help will be appreciated,
Eugen
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