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Listening to removed Extensions and ExtensionPoints [message #501353]

Tue, 01 December 2009 22:34

Claas Wilke

Messages: 5
Registered: November 2009

Junior Member

I'm currently working on a project that implements an IRegistryEventListener that uses the added(IExtension) and added(IExtensionPoint) methods as well as the removed(IExtension) and removed(IExtensionPoint) methods.

This listener manages its own registry of extensions and extensions points internally by storing additional information on them like contracts that must be fulfilled by both parties.

The problem is that every tike the removed(IExtension) orremoved(IExtensionPoint) method is invoked, the whole application crashes in an InvalidRegistryObjectException. I learned that this is because the bundle of the IExtension respectively the IExtensionPoint has been uninstalled and thus, the object is no longer valid.

Well, but what is the use of these removed() methods at all when all I get is an invalid object on which I can only invoke the isValid() method?

I can't event use these object to cache some additional information in a Map because the access to the Map crashes as well in an InvalidRegistryObjectException.

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