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Home » Eclipse Projects » P2 » Headless Updating Error
Headless Updating Error [message #552457] Thu, 12 August 2010 09:53
Simon  is currently offline Simon Friend
Messages: 6
Registered: August 2010
Junior Member
Hello,

I'm trying to add headless updating on my application. I use the code provided by the P2Util class in the project org.eclipse.equinox.p2.examples.rcp.prestartupdate. When I run the exported product, no problem. But when I run the application inside eclipse, a NullPointerException is thrown. I have the same issue why my project or with the org.eclipse.equinox.p2.examples.rcp.prestartupdate project.

Here is a piece of code from the P2Util class :
  ...
ProvisioningSession session = new ProvisioningSession(agent);
	
UpdateOperation operation = new UpdateOperation(session);
SubMonitor sub = SubMonitor.convert(monitor, "Checking for application updates...", 200);
IStatus status = operation.resolveModal(sub.newChild(100));
if (status.getCode() == UpdateOperation.STATUS_NOTHING_TO_UPDATE) {
	return status;
}
if (status.getSeverity() == IStatus.CANCEL)
	throw new OperationCanceledException();
  
if (status.getSeverity() != IStatus.ERROR) {
		
	ProvisioningJob job = operation.getProvisioningJob(null);
	status = job.runModal(sub.newChild(100));
	if (status.getSeverity() == IStatus.CANCEL)
		throw new OperationCanceledException();
}
	...


The error occurs precisely here :
status = job.runModal(sub.newChild(100));


just after :
ProvisioningJob job = operation.getProvisioningJob(null);


P2 detects an update and wants the provisionning job to do it but the operation doesn't return any ProvisioningJob, it's null.

Can you explain me why?

Here is the stack trace :
java.lang.reflect.InvocationTargetException
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:477)
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
	at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
	at org.eclipse.equinox.p2.examples.rcp.prestartupdate.ApplicationWorkbenchWindowAdvisor.postWindowOpen(ApplicationWorkbenchWindowAdvisor.java:94)
	at org.eclipse.ui.internal.WorkbenchWindow.fireWindowOpened(WorkbenchWindow.java:1332)
	at org.eclipse.ui.internal.WorkbenchWindow.open(WorkbenchWindow.java:798)
	at org.eclipse.ui.internal.Workbench$24.runWithException(Workbench.java:1234)
	at org.eclipse.ui.internal.StartupThreading$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:4041)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3660)
	at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
	at org.eclipse.ui.internal.Workbench$31.runWithException(Workbench.java:1566)
	at org.eclipse.ui.internal.StartupThreading$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:4041)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3660)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2537)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2427)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:670)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:663)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.equinox.p2.examples.rcp.prestartupdate.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)
Caused by: java.lang.NullPointerException
	at org.eclipse.equinox.p2.examples.rcp.prestartupdate.P2Util.checkForUpdates(P2Util.java:61)
	at org.eclipse.equinox.p2.examples.rcp.prestartupdate.ApplicationWorkbenchWindowAdvisor$1.run(ApplicationWorkbenchWindowAdvisor.java:76)
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
	... 38 more


Thanks,
Simon
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