Generally speaking you probably don't want to use this directly, instead you should use Catalyst::Plugin::Log::Log4perlSimple.
If you do want do use it, generally it would be in the form:
This is a replacement for Catalyst's Catalyst::Log object. It provides the same functionality (including flush/abort) so that plugins that don't want to log particular requests can do so successfully.
Martyn Smith <email@example.com>
This method is the same as Catalyst::Log's _flush method. Depending on the abort flag it either clears the buffer, or flushes it to screen/file.
Invoked by Moose after the object is constructed, this just initialises Log4perl using a custom config which uses the Log::Log4perl::Appender::CatalystProxy appender.