log::log4perl::level(3pm) [debian man page]

Level(3pm)						User Contributed Perl Documentation						Level(3pm)

NAME

       Log::Log4perl::Level - Predefined log levels

SYNOPSIS

	 use Log::Log4perl::Level;
	 print $ERROR, "
";

	 # -- or --

	 use Log::Log4perl qw(:levels);
	 print $ERROR, "
";

DESCRIPTION

       "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 ":levels" tag:

	   use Log::Log4perl qw(:levels);

       This is the preferred way, there's usually no need to call "Log::Log4perl::Level" explicitely.

       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" command:

	   use Log::Log4perl::Level qw(MyNameSpace);

       After this $MyNameSpace::ERROR, $MyNameSpace::INFO etc.	will be defined accordingly.

   Numeric levels and Strings
       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 ), "
";

       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 AND LICENSE

       Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.1							    2010-07-21								Level(3pm)

Check Out this Related Man Page

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!

COPYRIGHT AND LICENSE

       Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.1							    2010-07-21							  Resurrector(3pm)

Linux and UNIX Man Pages

log::log4perl::level(3pm) [debian man page]

Check Out this Related Man Page