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Simple configurator and bundle uninstall [message #1405063]

Wed, 06 August 2014 13:33

Alex Mising name

Messages: 149
Registered: March 2010

Senior Member

Hi,

I want to remove an unused bundle at runtime (both uninstall it and remove it from bundles.info configuration file). How do I go about doing that in code?

Currently, what I've done is call (during start-up):

   myNoLongerUsedBundle.uninstall();

This uninstalls the bundle (when I go to Help->About->Plugin Details it is not there) but it is still present in the configuration area (configuration/org.eclipse.equinox.simpleconfigurator/bundles.info).

How do I "properly" remove it from there? I want the P2 garbage collector application (eclipse -application org.eclipse.equinox.p2.garbagecollector.application -profile SDKProfile) to actually end up deleting the bundle altogether. It seems to me that the presence of the bundle in bundles.info prevents that. I understand one is not supposed to "delete files from the plugin folder" and neither should we "edit bundles.info manually".

So how do we I got about updating bundles.info from my code, to remove the bundle? It is no longer required and nothing references it as a dependency...

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Re: Simple configurator and bundle uninstall [message #1405123 is a reply to message #1405063]

Wed, 06 August 2014 16:29

Pascal Rapicault

Messages: 333
Registered: July 2009
Location: Ottawa

Senior Member

To remove the bundles from the running instance, get the instance of the Configurator service and call the applyConfiguration method.
Once this is done you should be able to call p2 GC. You can try to run the application using hte application service, or you can use the internals.

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Re: Simple configurator and bundle uninstall [message #1405171 is a reply to message #1405123]

Wed, 06 August 2014 19:09

Alex Mising name

Messages: 149
Registered: March 2010

Senior Member

Hello Pascal,

First off, I really appreciate your pointers. Can you elaborate on how to use the internals? I still get a ClassNotFoundException for the configurator.

What I've done so far based on your instructions is that I added the following after the uninstall call:

	BundleContext context = Activator.getDefault().getContext();
	ServiceReference<?> reference = context.getServiceReference(
		"org.eclipse.equinox.internal.provisional.configurator.Configurator");
	Configurator result = (Configurator) context.getService(reference);

Within the IDE the code works, even though I get the warning:

Discouraged access: The type Configurator is not accessible due to restriction on required project 
	 org.eclipse.equinox.simpleconfigurator

When I launch the application from outside the IDE, I get this error:

Caused by: java.lang.ClassNotFoundException: org.eclipse.equinox.internal.provisional.configurator.Configurator
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:513)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	... 37 more

P.S. To avoid the access restrictions for invoking the P2 garbage-collector, I scan the extension registry and start the application as described here..

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