log4cxx rolling or size based policy question

Hi, I am using log4cxx and would like to know how (if possible) to configure in
the xml both a FileNamePattern and an ActiveFileName so that the active log file
is in a different directory than the archived log files?

Also, is it possible to have something like MaxBackupIndex or similar with a
time based rolling policy so that it automatically purges old archives?

Thank you,
--

-- 
Andres