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 2002-2009 by Mike Schilli <firstname.lastname@example.org> and Kevin Goess <email@example.com>.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.