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Log::Any::Adapter::Development(User Contributed Perl DocumentaLog::Any::Adapter::Development(3pm)
NAME
Log::Any::Adapter::Development - Manual for developing new Log::Any adapters
VERSION
version 1.710
SYNOPSIS
The adapter module:
package Log::Any::Adapter::YAL;
use strict;
use warnings;
use Log::Any::Adapter::Util ();
use base qw(Log::Any::Adapter::Base);
# Optionally initialize object, e.g. for delegation
#
sub init {
my ($self) = @_;
$self->{attr} = ...;
}
# Create logging methods: debug, info, etc.
#
foreach my $method ( Log::Any::Adapter::Util::logging_methods() ) {
no strict 'refs';
*$method = sub { ... };
}
# or, support structured logging instead
sub structured {
my ($self, $level, $category, @args) = @_;
# ... process and log all @args
}
# Create detection methods: is_debug, is_info, etc.
#
foreach my $method ( Log::Any::Adapter::Util::detection_methods() ) {
no strict 'refs';
*$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.
LOG LEVELS
Log::Any supports the following log levels:
If the logging mechanism used by your adapter supports different levels, it's your
responsibility to map them appropriately when you implement the logging and detection
methods described below. For example, if your mechanism only supports "debug", "normal"
and "fatal" levels, you might map the levels like this:
METHODS
Constructor
The constructor ("new") is provided by Log::Any::Adapter::Base. It will:
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.
Logging methods
The following methods have no default implementation, and MUST be defined by your
subclass, unless your adapter supports "Structured logging":
These methods must log a message at the specified level.
To help generate these methods programmatically, you can get a list of the sub names with
the Log::Any::Adapter::Util::logging_methods function.
Log-level detection methods (required)
The following methods have no default implementation, and MUST be defined by your
subclass:
These methods must return a boolean indicating whether the specified level is active, i.e.
whether the adapter is listening for messages of that level.
To help generate these methods programmatically, you can get a list of the sub names with
the Log::Any::Adapter::Util::detection_methods function.
Structured logging
Your adapter can choose to receive structured data instead of a string. In this case,
instead of implementing all the "Logging methods", you define a single method called
"structured". The method receives the log level, the category, and all arguments that were
passed to the logging function, so be prepared to not only handle strings, but also
hashrefs, arrayrefs, coderefs, etc.
Aliases
Aliases (e.g. "err" for "error") are handled by Log::Any::Proxy and will call the
corresponding real name in your adapter class. You do not need to implement them in your
adapter.
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.
Perform any necessary validation or initialization here. For example, you would use
"init" to create a logging object for delegation, or open a file or socket, etc.
Support methods
The following Log::Any::Adapter::Base method may be useful for defining adapters via
delegation:
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.
The following Log::Any::Adapter::Util functions give you a list of methods that you need
to implement. You can get logging methods, detection methods or both:
AUTHORS
o Jonathan Swartz <swartz AT pobox.com>
o David Golden <dagolden AT cpan.org>
o Doug Bell <preaction AT cpan.org>
o Daniel Pittman <daniel AT rimspace.net>
o Stephen Thirlwall <sdt AT cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2017 by Jonathan Swartz, David Golden, and Doug Bell.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.
perl v5.32.1 2021-09-27 Log::Any::Adapter::Development(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2025-02-22 08:57 @18.216.234.123 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)