An rather minimal but sufficient implementation redirecting all calls to a log4j logger to a logback logger.
This class is a minimal implementation of the original org.apache.log4j.Logger class by delegation of all calls to a org.slf4j.Logger.Logger instance.
org.apache.log4j.Logger
Log4j's trace, debug(), info(), warn(), error() printing methods are directly mapped to their SLF4J equivalents.
trace
debug()
info()
warn()
error()
OFF
FATAL
ERROR
WARN
INFO
ALL