1Resurrector(3)        User Contributed Perl Documentation       Resurrector(3)
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NAME

6       Log::Log4perl::Resurrector - Dark Magic to resurrect hidden L4p
7       statements
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DESCRIPTION

10       Loading "use Log::Log4perl::Resurrector" causes subsequently loaded
11       modules to have their hidden
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13           ###l4p use Log::Log4perl qw(:easy);
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15           ###l4p DEBUG(...)
16           ###l4p INFO(...)
17           ...
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19       statements uncommented and therefore 'resurrected', i.e. activated.
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21       This allows for a module "Foobar.pm" to be written with Log4perl
22       statements commented out and running at full speed in normal mode.
23       When loaded via
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25           use Foobar;
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27       all hidden Log4perl statements will be ignored.
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29       However, if a script loads the module "Foobar" after loading
30       "Log::Log4perl::Resurrector", as in
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32           use Log::Log4perl::Resurrector;
33           use Foobar;
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35       then "Log::Log4perl::Resurrector" will have put a source filter in
36       place that will extract all hidden Log4perl statements in "Foobar"
37       before "Foobar" actually gets loaded.
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39       Therefore, "Foobar" will then behave as if the
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41           ###l4p use Log::Log4perl qw(:easy);
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43           ###l4p DEBUG(...)
44           ###l4p INFO(...)
45           ...
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47       statements were actually written like
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49           use Log::Log4perl qw(:easy);
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51           DEBUG(...)
52           INFO(...)
53           ...
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55       and the module "Foobar" will indeed be Log4perl-enabled. Whether any
56       activated Log4perl statement will actually trigger log messages, is up
57       to the Log4perl configuration, of course.
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59       There's a startup cost to using "Log::Log4perl::Resurrector" (all
60       subsequently loaded modules are examined) but once the compilation
61       phase has finished, the perl program will run at full speed.
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63       Some of the techniques used in this module have been stolen from the
64       "Acme::Incorporated" CPAN module, written by chromatic. Long live CPAN!
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67       Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess
68       <cpan@goess.org>.
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70       This library is free software; you can redistribute it and/or modify it
71       under the same terms as Perl itself.
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75perl v5.12.2                      2010-08-31                    Resurrector(3)
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