Ok I've committer a first version of the move. So what remains to be done: 1) Migrate code to use @Inject Logger logger; instead of using deprecated Logenabled/AbstractLogEnabled 2) Use the new SLF4J solution for performant logging whenever possible: logger.debug("blah {} blah {}", var1, var2) 3) Move all non component code to use SLF4J and not commons logging I need help from everyone to finish this up, over time. Please let me know if you have any question I also have to update the documentation on xwiki.org which I'll do in the coming few days. Thanks -Vincent