Michael Schilli > Log-Log4perl-1.38 > Log::Log4perl::Config::BaseConfigurator

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NAME ^

Log::Log4perl::Config::BaseConfigurator - Configurator Base Class

SYNOPSIS ^

This is a virtual base class, all configurators should be derived from it.

DESCRIPTION ^

METHODS

new

Constructor, typically called like

    my $config_parser = SomeConfigParser->new(
        file => $file,
    );

    my $data = $config_parser->parse();

Instead of file, the derived class SomeConfigParser may define any type of configuration input medium (e.g. url => 'http://foobar'). It just has to make sure its parse() method will later pull the input data from the medium specified.

The base class accepts a filename or a reference to an array of text lines:

file

Specifies a file which the parse() method later parses.

text

Specifies a reference to an array of scalars, representing configuration records (typically lines of a file). Also accepts a simple scalar, which it splits at its newlines and transforms it into an array:

    my $config_parser = MyYAMLParser->new(
        text => ['foo: bar',
                 'baz: bam',
                ],
    );

    my $data = $config_parser->parse();

If either file or text parameters have been specified in the constructor call, a later call to the configurator's text() method will return a reference to an array of configuration text lines. This will typically be used by the parse() method to process the input.

parse

Virtual method, needs to be defined by the derived class.

Parser requirements

EXAMPLES

The following Log::Log4perl configuration:

    log4perl.category.Bar.Twix        = WARN, Screen
    log4perl.appender.Screen          = Log::Log4perl::Appender::File
    log4perl.appender.Screen.filename = test.log
    log4perl.appender.Screen.layout   = Log::Log4perl::Layout::SimpleLayout

needs to be transformed by the parser's parse() method into this data structure:

    { appender => {
        Screen  => {
          layout => { 
            value  => "Log::Log4perl::Layout::SimpleLayout" },
            value  => "Log::Log4perl::Appender::Screen",
        },
      },
      category => { 
        Bar => { 
          Twix => { 
            value => "WARN, Screen" } 
        } }
    }

For a full-fledged example, check out the sample YAML parser implementation in eg/yamlparser. It uses a simple YAML syntax to specify the Log4perl configuration to illustrate the concept.

SEE ALSO ^

Log::Log4perl::Config::PropertyConfigurator

Log::Log4perl::Config::DOMConfigurator

Log::Log4perl::Config::LDAPConfigurator (tbd!)

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.

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