NAME

       Log::Any::Adapter::Development -- Manual for developing new Log::Any adapters

VERSION

       version 0.11

SYNOPSIS

       The adapter module:

          package Log::Any::Adapter::YAL;
          use strict;
          use warnings;
          use Log::Any::Adapter::Util qw(make_method);
          use base qw(Log::Any::Adapter::Base);

          # Optionally initialize object
          #
          sub init {
              my ($self) = @_;

              $self->{attr} = ...;
          }

          # Create logging methods: debug, info, etc.
          #
          foreach my $method ( Log::Any->logging_methods() ) {
              make_method($method, sub { ... });
          }

          # Create detection methods: is_debug, is_info, etc.
          #
          foreach my $method ( Log::Any->detection_methods() ) {
              make_method($method, sub { ... });
          }

       and the application:

          Log::Any->set_adapter('YAL');

DESCRIPTION

       This document describes how to implement a new Log::Any adapter.

       The easiest way to start is to look at the source of existing adapters, such as
       Log::Any::Adapter::Log4perl and Log::Any::Adapter::Dispatch.

NAMING

       If you are going to publicly release your adapter, call it 'Log::Any::Adapter::something'
       so that users can use it with

           Log::Any->set_adapter(I<something>);

       If it's an internal driver, you can call it whatever you like and use it like

           Log::Any->set_adapter('+My::Log::Adapter');

BASE CLASS

       All adapters must directly or indirectly inherit from Log::Any::Adapter::Base.

METHODS

   Constructor
       The constructor ("new") is provided by Log::Any::Adapter::Base. It will:

       •   place any adapter arguments into a hash, along with the category

       •   bless the hash into your subclass

       •   call "init" which may be optionally provided by your subclass

       At this point, overriding the default constructor is not supported. Hopefully it will not
       be needed.

       The constructor is called whenever a log object is requested. e.g. If the application
       initializes Log::Any like so:

           Log::Any->set_adapter('Log::YAL', yal_object => $yal, depth => 3);

       and then a class requests a logger like so:

           package Foo;
           use Log::Any qw($log);

       Then $log will be populated with the return value of:

           Log::Any::Adapter::Yal->new(yal_object => $yal, depth => 3, category => 'Foo');

       This is memoized, so if the same category should be requested again (e.g.  through a
       separate "get_logger" call, the same object will be returned.  Therefore, you should try
       to avoid anything non-deterministic in your "init" function.

   Required methods
       The following methods have no default implementation, and MUST be defined by your
       subclass:

       debug ($msg)
       info ($msg)
       notice ($msg)
       warning ($msg)
       error ($msg)
       critical ($msg)
       alert ($msg)
       emergency ($msg)
           These methods log a message at the specified level.

           To help generate these methods programmatically, you can get a list of the sub names
           with #__METHOD

               Log::Any->logging_methods

       is_debug ()
       is_info ()
       is_notice ()
       is_warning ()
       is_error ()
       is_critical ()
       is_alert ()
       is_emergency ()
           These methods return a boolean indicating whether the specified level is active.

           To help generate these methods programmatically, you can get a list of the sub names
           with #__METHOD

               Log::Any->detection_methods

   Optional methods
       The following methods have no default implementation but MAY be provided by your subclass:

       init ()
           This is called after the adapter object is created and blessed into your class.  It
           will be a hash containing the parameters that were passed to new(). Perform any
           necessary validation or initialization here.

   Support methods
       The following methods are useful for defining adapters:

       delegate_method_to_slot ($slot, $method, $adapter_method)
           Handle the specified $method by calling $adapter_method on the object contained in
           $self->{$slot}.

           See Log::Any::Adapter::Dispatch and Log::Any::Adapter::Log4perl for examples of usage.

       Log::Any->logging_methods
           Returns a list of logging methods: debug, info, etc.

       Log::Any->detection_methods
           Returns a list of detection methods: is_debug, is_info, etc.

       Log::Any->logging_and_detection_methods
           Returns a combined list of logging and detection methods.

SEE ALSO

       Log::Any

COPYRIGHT AND LICENSE

       This software is copyright (c) 2011 by Jonathan Swartz.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.