[logback-user] Integrating OSGi (Felix), Logback and SLF4J

I'm trying to integrate Logback Classic in Apache Felix. My goal is to have a bundle-based context system so each bundle has it's own logging factory. It's important that each bundle is able to supply it's own configuration file. I've tried a few things and even wrote a simple ContextSelector but I don't seem to get it right. Therefore I thought: before going in a time consuming trial and error process let's ask the experts first. So, my question: how can I create new loggercontexts efficiently with each a separate configuration? Regards, Sander