Resurrector(3pm) User Contributed Perl Documentation Resurrector(3pm)
NAME
Log::Log4perl::Resurrector - Dark Magic to resurrect hidden L4p statements
DESCRIPTION
Loading "use Log::Log4perl::Resurrector" causes subsequently loaded modules to have their
hidden
###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
use Foobar;
all hidden Log4perl statements will be ignored.
However, if a script loads the module "Foobar" after loading "Log::Log4perl::Resurrector",
as in
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
###l4p DEBUG(...)
###l4p INFO(...)
...
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!
AUTHORS
Mike Schilli <m AT perlmeister.com>
COPYRIGHT AND LICENSE
Copyright 2002-2007 by Mike Schilli <m AT perlmeister.com>
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
perl v5.10.0 2007-06-23 Resurrector(3pm)
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