=head1 NAME

Log::Report::Dispatcher::Log4perl - send messages to Log::Log4perl back-end

=head1 INHERITANCE

 Log::Report::Dispatcher::Log4perl
   is a Log::Report::Dispatcher

=head1 SYNOPSIS

 dispatcher Log::Log4perl => 'logger', accept => 'NOTICE-'
   , config => "$ENV{HOME}/.log.conf"
   , to_level => [ 'ALERT-' => $ERROR ];

 # disable default dispatcher
 dispatcher close => 'logger';

 # configuration inline, not in file: adapted from the Log4perl manpage
 my $name    = 'logger';
 my $outfile = '/tmp/a.log';
 my $config  = <<__CONFIG;
 log4perl.category.$name            = INFO, Logfile
 log4perl.appender.Logfile          = Log::Log4perl::Appender::File
 log4perl.appender.Logfile.filename = $outfn
 log4perl.appender.Logfile.layout   = Log::Log4perl::Layout::PatternLayout
 log4perl.appender.Logfile.layout.ConversionPattern = %d %F{1} %L> %m
 __CONFIG

 dispatcher 'Log::Log4perl' => $name, config => \$config;

=head1 DESCRIPTION

This dispatchers produces output tot syslog, based on the C<Sys::Log4perl>
module (which will not be automatically installed for you).

The REASON for a message often uses names which are quite similar to the
log-levels used by Log::Dispatch.  However: they have a different
approach.  The REASON of Log::Report limits the responsibility of the
programmer to indicate the cause of the message: whether it was able to
handle a certain situation.  The Log::Dispatch levels are there for the
user's of the program.  However: the programmer does not known anything
about the application (in the general case).  This is cause of much of
the trickery in Perl programs.

The default translation table is list below.  You can change the mapping
using L<new(to_level)|Log::Report::Dispatcher::Log4perl/"Constructors">.  See example in SYNOPSIS.

  TRACE   => $DEBUG  ERROR   => $ERROR
  ASSERT  => $DEBUG  FAULT   => $ERROR
  INFO    => $INFO   ALERT   => $FATAL
  NOTICE  => $INFO   FAILURE => $FATAL
  WARNING => $WARN   PANIC   => $FATAL
  MISTAKE => $WARN

=head1 METHODS

=head2 Constructors

=over 4

=item $obj-E<gt>B<close>()

See L<Log::Report::Dispatcher/"Constructors">

=item Log::Report::Dispatcher::Log4perl-E<gt>B<new>(TYPE, NAME, OPTIONS)

The Log::Log4perl infrastructure has all information in a configuration
file.  In that file, you should find a category with the NAME.

 -Option       --Defined in             --Default
  accept         Log::Report::Dispatcher  depend on mode
  charset        Log::Report::Dispatcher  <undef>
  config                                  <required>
  format_reason  Log::Report::Dispatcher  'LOWERCASE'
  locale         Log::Report::Dispatcher  <system locale>
  mode           Log::Report::Dispatcher  'NORMAL'
  to_level                                []

=over 2

=item accept => REASONS

=item charset => CHARSET

=item config => FILENAME|SCALAR

When a SCALAR reference is passed in, that must refer to a string which
contains the configuration text.  Otherwise, specify an existing FILENAME.

=item format_reason => 'UPPERCASE'|'LOWERCASE'|'UCFIRST'|'IGNORE'|CODE

=item locale => LOCALE

=item mode => 'NORMAL'|'VERBOSE'|'ASSERT'|'DEBUG'|0..3

=item to_level => ARRAY-of-PAIRS

See L<reasonToLevel()|Log::Report::Dispatcher::Log4perl/"Logging">.

=back

=back

=head2 Accessors

=over 4

=item $obj-E<gt>B<appender>()

Returns the Log::Log4perl::Logger object which is used for logging.

=item $obj-E<gt>B<isDisabled>()

See L<Log::Report::Dispatcher/"Accessors">

=item $obj-E<gt>B<mode>()

See L<Log::Report::Dispatcher/"Accessors">

=item $obj-E<gt>B<name>()

See L<Log::Report::Dispatcher/"Accessors">

=item $obj-E<gt>B<needs>()

See L<Log::Report::Dispatcher/"Accessors">

=item $obj-E<gt>B<type>()

See L<Log::Report::Dispatcher/"Accessors">

=back

=head2 Logging

=over 4

=item $obj-E<gt>B<collectLocation>()

=item Log::Report::Dispatcher::Log4perl-E<gt>B<collectLocation>()

See L<Log::Report::Dispatcher/"Logging">

=item $obj-E<gt>B<collectStack>([MAXDEPTH])

=item Log::Report::Dispatcher::Log4perl-E<gt>B<collectStack>([MAXDEPTH])

See L<Log::Report::Dispatcher/"Logging">

=item $obj-E<gt>B<log>(HASH-of-OPTIONS, REASON, MESSAGE)

See L<Log::Report::Dispatcher/"Logging">

=item $obj-E<gt>B<reasonToLevel>(REASON)

Returns a level which is understood by Log::Dispatch, based on
a translation table.  This can be changed with L<new(to_level)|Log::Report::Dispatcher::Log4perl/"Constructors">.

=item $obj-E<gt>B<stackTraceLine>(OPTIONS)

=item Log::Report::Dispatcher::Log4perl-E<gt>B<stackTraceLine>(OPTIONS)

See L<Log::Report::Dispatcher/"Logging">

=item $obj-E<gt>B<translate>(HASH-of-OPTIONS, REASON, MESSAGE)

See L<Log::Report::Dispatcher/"Logging">

=back

=head1 SEE ALSO

This module is part of Log-Report distribution version 0.991,
built on November 26, 2012. Website: F<http://perl.overmeer.net/log-report/>

=head1 LICENSE

Copyrights 2007-2012 by [Mark Overmeer]. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See F<http://www.perl.com/perl/misc/Artistic.html>