Does logback support log4j appenders?

Question

Can custom appenders created for log4j (extending AppenderSkeleton) be used with new logback framework? I know that logback comes with its own set of appenders similar to log4j, but is this possible to re-use existing ones? How?

Answer 1

The following document describes how to "[migrate] custom log4j components such as appenders or layouts to logback-classic":

http://logback.qos.ch/manual/migrationFromLog4j.html

Answer 2

It should be easy to port a log4j appender to logback. There is even a document describing the process. However, if you run into problems (which you should not), don't hesitate to ask for help on the logback-dev mailing list.

Answer 3

No, logback appenders need to implement logback's Appender interface. Should be feasible to write a wrapper appender if you wanted to use an existing log4j appender.