NAME¶

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

INHERITANCE¶

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

SYNOPSIS¶

 # start using log4perl via a config file
 # The name of the dispatcher is the name of the default category.
 dispatcher LOG4PERL => 'logger'
   , accept => 'NOTICE-'
   , config => "$ENV{HOME}/.log.conf";
 # 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.logger.Logfile          = Log::Log4perl::Appender::File
 log4perl.logger.Logfile.filename = $outfn
 log4perl.logger.Logfile.layout   = Log::Log4perl::Layout::PatternLayout
 log4perl.logger.Logfile.layout.ConversionPattern = %d %F{1} %L> %m
 __CONFIG
 dispatcher LOG4PERL => $name, config => \$config;

DESCRIPTION¶

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

Extends "DESCRIPTION" in Log::Report::Dispatcher.

Reasons <--> Levels¶

The REASONs for a message in Log::Report are names quite similar to the log levels used by Log::Log4perl. The default mapping is list below. You can change the mapping using new(to_level).

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

Categories¶

"Log::Report" uses text-domains for translation tables. These are also used as categories for the Log4perl infrastructure. So, typically every module start with:

   use Log::Report 'my-text-domain', %more_options;

Now, if there is a logger inside the log4perl configuration which is named 'my-text-domain', that will be used. Otherwise, the name of the dispatcher is used to select the logger.

Limitiations

The global $caller_depth concept of Log::Log4perl is broken. That variable is used to find the filename and line number of the logged messages. But these messages may have been caught, rerouted, eval'ed, and otherwise followed a unpredictable multi-leveled path before it reached the Log::Log4perl dispatcher. This means that layout patterns %F and %L are not useful in the generic case, maybe in your specific case.

METHODS¶

Extends "METHODS" in Log::Report::Dispatcher.

Constructors¶

Extends "Constructors" in Log::Report::Dispatcher.

$obj->close()

Inherited, see "Constructors" in Log::Report::Dispatcher

Log::Report::Dispatcher::Log4perl->new($type, $name, %options)

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

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

accept => REASONS
charset => CHARSET
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.
By default, it is expected that Log::Log4perl has been initialized externally. That module uses global variables to communicate, which should be present before any logging is attempted.
format_reason => 'UPPERCASE'|'LOWERCASE'|'UCFIRST'|'IGNORE'|CODE
locale => LOCALE
mode => 'NORMAL'|'VERBOSE'|'ASSERT'|'DEBUG'|0..3
to_level => ARRAY-of-PAIRS: See reasonToLevel().

Accessors¶

Extends "Accessors" in Log::Report::Dispatcher.

$obj->isDisabled(): Inherited, see "Accessors" in Log::Report::Dispatcher
$obj->logger( [$domain] ): Returns the Log::Log4perl::Logger object which is used for logging. When there is no specific logger for this $domain (logger with the exact name of the $domain) the default logger is being used, with the name of this dispatcher.
$obj->mode(): Inherited, see "Accessors" in Log::Report::Dispatcher
$obj->name(): Inherited, see "Accessors" in Log::Report::Dispatcher
$obj->needs( [$reason] ): Inherited, see "Accessors" in Log::Report::Dispatcher
$obj->type(): Inherited, see "Accessors" in Log::Report::Dispatcher