I want to use conditional processing in my logback.xml of my OSGi application.

I learnt that I have to add the Janino library (and the Janino commons-compiler) to the application's classpath. I do that and let the OSGi container (equinox) start these libraries. However, I still get the error 'ERROR in ch.qos.logback.core.model.processor.conditional.IfModelHandler - Could not find Janino library on the class path. Skipping conditional processing.'.

What is the proper way to add the Janino library to the classpath (in an OSGi application)?

Note: I've also downloaded and added 'janino-fragment' from logback-contrib. Still the same result.

Best,

Benno