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

6       Log::Log4perl::Level - Predefined log levels
7

SYNOPSIS

9         use Log::Log4perl::Level;
10         print $ERROR, "\n";
11
12         # -- or --
13
14         use Log::Log4perl qw(:levels);
15         print $ERROR, "\n";
16

DESCRIPTION

18       "Log::Log4perl::Level" simply exports a predefined set of Log4perl log
19       levels into the caller's name space. It is used internally by
20       "Log::Log4perl". The following scalars are defined:
21
22           $OFF
23           $FATAL
24           $ERROR
25           $WARN
26           $INFO
27           $DEBUG
28           $TRACE
29           $ALL
30
31       "Log::Log4perl" also exports these constants into the caller's
32       namespace if you pull it in providing the ":levels" tag:
33
34           use Log::Log4perl qw(:levels);
35
36       This is the preferred way, there's usually no need to call
37       "Log::Log4perl::Level" explicitly.
38
39       The numerical values assigned to these constants are purely virtual,
40       only used by Log::Log4perl internally and can change at any time, so
41       please don't make any assumptions. You can test for numerical equality
42       by directly comparing two level values, that's ok:
43
44           if( get_logger()->level() == $DEBUG ) {
45               print "The logger's level is DEBUG\n";
46           }
47
48       But if you want to figure out which of two levels is more verbose, use
49       Log4perl's own comparator:
50
51           if( Log::Log4perl::Level::isGreaterOrEqual( $level1, $level2 ) ) {
52               print Log::Log4perl::Level::to_level( $level1 ),
53                   " is equal or more verbose than ",
54                   Log::Log4perl::Level::to_level( $level2 ), "\n";
55           }
56
57       If the caller wants to import level constants into a different
58       namespace, it can be provided with the "use" command:
59
60           use Log::Log4perl::Level qw(MyNameSpace);
61
62       After this $MyNameSpace::ERROR, $MyNameSpace::INFO etc.  will be
63       defined accordingly.
64
65   Numeric levels and Strings
66       Level variables like $DEBUG or $WARN have numeric values that are
67       internal to Log4perl. Transform them to strings that can be used in a
68       Log4perl configuration file, use the c<to_level()> function provided by
69       Log::Log4perl::Level:
70
71           use Log::Log4perl qw(:easy);
72           use Log::Log4perl::Level;
73
74               # prints "DEBUG"
75           print Log::Log4perl::Level::to_level( $DEBUG ), "\n";
76
77       To perform the reverse transformation, which takes a string like
78       "DEBUG" and converts it into a constant like $DEBUG, use the
79       to_priority() function:
80
81           use Log::Log4perl qw(:easy);
82           use Log::Log4perl::Level;
83
84           my $numval = Log::Log4perl::Level::to_priority( "DEBUG" );
85
86       after which $numval could be used where a numerical value is required:
87
88           Log::Log4perl->easy_init( $numval );
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LICENSE

91       Copyright 2002-2013 by Mike Schilli <m@perlmeister.com> and Kevin Goess
92       <cpan@goess.org>.
93
94       This library is free software; you can redistribute it and/or modify it
95       under the same terms as Perl itself.
96

AUTHOR

98       Please contribute patches to the project on Github:
99
100           http://github.com/mschilli/log4perl
101
102       Send bug reports or requests for enhancements to the authors via our
103
104       MAILING LIST (questions, bug reports, suggestions/patches):
105       log4perl-devel@lists.sourceforge.net
106
107       Authors (please contact them via the list above, not directly): Mike
108       Schilli <m@perlmeister.com>, Kevin Goess <cpan@goess.org>
109
110       Contributors (in alphabetical order): Ateeq Altaf, Cory Bennett, Jens
111       Berthold, Jeremy Bopp, Hutton Davidson, Chris R. Donnelly, Matisse
112       Enzer, Hugh Esco, Anthony Foiani, James FitzGibbon, Carl Franks, Dennis
113       Gregorovic, Andy Grundman, Paul Harrington, Alexander Hartmaier  David
114       Hull, Robert Jacobson, Jason Kohles, Jeff Macdonald, Markus Peter,
115       Brett Rann, Peter Rabbitson, Erik Selberg, Aaron Straup Cope, Lars
116       Thegler, David Viner, Mac Yang.
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120perl v5.36.0                      2022-10-24                          Level(3)
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