Log::Log4perl::Level - Predefined log levels
use Log::Log4perl::Level; print $ERROR, "\n"; # -- or -- use Log::Log4perl qw(:levels); print $ERROR, "\n";
Log::Log4perl::Level simply exports a predefined set of Log4perl log levels into the caller's name space. It is used internally by
Log::Log4perl. The following scalars are defined:
$OFF $FATAL $ERROR $WARN $INFO $DEBUG $TRACE $ALL
Log::Log4perl also exports these constants into the caller's namespace if you pull it in providing the
use Log::Log4perl qw(:levels);
This is the preferred way, there's usually no need to call
The numerical values assigned to these constants are purely virtual, only used by Log::Log4perl internally and can change at any time, so please don't make any assumptions.
If the caller wants to import these constants into a different namespace, it can be provided with the
use Log::Log4perl::Level qw(MyNameSpace);
$MyNameSpace::INFO etc. will be defined accordingly.
Level variables like $DEBUG or $WARN have numeric values that are internal to Log4perl. Transform them to strings that can be used in a Log4perl configuration file, use the c<to_level()> function provided by Log::Log4perl::Level:
use Log::Log4perl qw(:easy); use Log::Log4perl::Level; # prints "DEBUG" print Log::Log4perl::Level::to_level( $DEBUG ), "\n";
To perform the reverse transformation, which takes a string like "DEBUG" and converts it into a constant like
$DEBUG, use the to_priority() function:
use Log::Log4perl qw(:easy); use Log::Log4perl::Level; my $numval = Log::Log4perl::Level::to_priority( "DEBUG" );
after which $numval could be used where a numerical value is required:
Log::Log4perl->easy_init( $numval );
Copyright 2002-2012 by Mike Schilli <email@example.com> and Kevin Goess <firstname.lastname@example.org>.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Please contribute patches to the project on Github:
Send bug reports or requests for enhancements to the authors via our
MAILING LIST (questions, bug reports, suggestions/patches): email@example.com
Authors (please contact them via the list above, not directly): Mike Schilli <firstname.lastname@example.org>, Kevin Goess <email@example.com>
Contributors (in alphabetical order): Ateeq Altaf, Cory Bennett, Jens Berthold, Jeremy Bopp, Hutton Davidson, Chris R. Donnelly, Matisse Enzer, Hugh Esco, Anthony Foiani, James FitzGibbon, Carl Franks, Dennis Gregorovic, Andy Grundman, Paul Harrington, David Hull, Robert Jacobson, Jason Kohles, Jeff Macdonald, Markus Peter, Brett Rann, Peter Rabbitson, Erik Selberg, Aaron Straup Cope, Lars Thegler, David Viner, Mac Yang.