Yeah. You can't do that. I had that problem too - you have to find a new way to do in log4j. I can't look now, but I will find what I did and post it tomorrow.
Don't waste time trying to find a similar mechanism - it was something rather different. On Fri, Aug 12, 2022 at 6:18 PM Gary Gregory <garydgreg...@gmail.com> wrote: > Joel, > > Is it possible to use Log4j 2's much richer feature set as is? Perhaps you > could explain what is it your old appender does that requires custom code. > > Gary > > On Fri, Aug 12, 2022, 15:35 Joel Griffith <jgrif...@nd.edu> wrote: > > > I have a Java application containing a package written to use Log4j v1. > I > > am struggling to update this package to use Log4j v2 to remediate its > > security vulnerabilities. > > > > The package contains a custom Appender that subclasses Log4j v1's > > FileAppender. I am stumped at how to convert this file to Log4j v2. In > > Log4j v2, the FileAppender class is 'final' and cannot be subclassed, so > I > > cannot create a new version of the custom Appender that mirrors the > first. > > More importantly, perhaps, is that the Log4j v2 FileAppender is a Plugin > > and completely different in structure from the Log4j v1 FileAppender. > > > > I found this page that ostensibly explains how to extend Log4j: > > https://logging.apache.org/log4j/2.x/manual/extending.html#Appenders > > but it contains no information about actually extending Appenders or > > procedures for accomplishing an equivalent goal. > > > > Is there any reasonable way of converting this custom Appender from Log4j > > v1 to v2? > > > > Thanks, > > Joel > > > -- ☮
