Log::Log4perl::Resurrector - Dark Magic to resurrect hidden L4p statements
Loading use Log::Log4perl::Resurrector causes subsequently loaded modules to have their hidden
use Log::Log4perl::Resurrector
###l4p DEBUG(...) ###l4p INFO(...) ...
statements uncommented and therefore 'resurrected', i.e. activated.
This allows for a module Foobar.pm to be written with Log4perl statements commented out and running at full speed in normal mode. When loaded via
Foobar.pm
use Foobar;
all hidden Log4perl statements will be ignored.
However, if a script loads the module Foobar after loading Log::Log4perl::Resurrector, as in
Foobar
Log::Log4perl::Resurrector
use Log::Log4perl::Resurrector; use Foobar;
then Log::Log4perl::Resurrector will have put a source filter in place that will extract all hidden Log4perl statements in Foobar before Foobar actually gets loaded.
Therefore, Foobar will then behave as if the
statements were actually written like
DEBUG(...) INFO(...) ...
and the module Foobar will indeed be Log4perl-enabled. Whether any activated Log4perl statement will actually trigger log messages, is up to the Log4perl configuration, of course.
There's a startup cost to using Log::Log4perl::Resurrector (all subsequently loaded modules are examined) but once the compilation phase has finished, the perl program will run at full speed.
Some of the techniques used in this module have been stolen from the Acme::Incorporated CPAN module, written by chromatic. Long live CPAN!
Acme::Incorporated
Mike Schilli <m@perlmeister.com>
Copyright 2002-2007 by Mike Schilli <m@perlmeister.com>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install Log::Log4perl, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Log::Log4perl
CPAN shell
perl -MCPAN -e shell install Log::Log4perl
For more information on module installation, please visit the detailed CPAN module installation guide.