Log::Dispatch::Output(3pm) User Contributed Perl Documentation Log::Dispatch::Output(3pm)
NAME
Log::Dispatch::Output - Base class for all Log::Dispatch::* objects
VERSION
version 2.32
SYNOPSIS
package Log::Dispatch::MySubclass;
use Log::Dispatch::Output;
use base qw( Log::Dispatch::Output );
sub new {
my $proto = shift;
my $class = ref $proto || $proto;
my %p = @_;
my $self = bless {}, $class;
$self->_basic_init(%p);
# Do more if you like
return $self;
}
sub log_message {
my $self = shift;
my %p = @_;
# Do something with message in $p{message}
}
1;
DESCRIPTION
This module is the base class from which all Log::Dispatch::* objects should be derived.
CONSTRUCTOR
The constructor, "new", must be overridden in a subclass. See Output Classes for a description of the common parameters accepted by this
constructor.
METHODS
o _basic_init(%p)
This should be called from a subclass's constructor. Make sure to pass the arguments in @_ to it. It sets the object's name and
minimum level. It also sets up two other attributes which are used by other Log::Dispatch::Output methods, level_names and
level_numbers.
o name
Returns the object's name.
o min_level
Returns the object's minimum log level.
o max_level
Returns the object's maximum log level.
o accepted_levels
Returns a list of the object's accepted levels (by name) from minimum to maximum.
o log( level => $, message => $ )
Sends a message if the level is greater than or equal to the object's minimum level. This method applies any message formatting
callbacks that the object may have.
o _should_log ($)
This method is called from the "log()" method with the log level of the message to be logged as an argument. It returns a boolean
value indicating whether or not the message should be logged by this particular object. The "log()" method will not process the
message if the return value is false.
o _level_as_number ($)
This method will take a log level as a string (or a number) and return the number of that log level. If not given an argument, it
returns the calling object's log level instead. If it cannot determine the level then it will croak.
o add_callback( $code )
Adds a callback (like those given during construction). It is added to the end of the list of callbacks.
Subclassing
This class should be used as the base class for all logging objects you create that you would like to work under the Log::Dispatch
architecture. Subclassing is fairly trivial. For most subclasses, if you simply copy the code in the SYNOPSIS and then put some
functionality into the "log_message" method then you should be all set. Please make sure to use the "_basic_init" method as directed.
The actual logging implementation should be done in a "log_message" method that you write. Do not override "log"!.
AUTHOR
Dave Rolsky <autarch@urth.org>
COPYRIGHT AND LICENSE
This software is Copyright (c) 2011 by Dave Rolsky.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
perl v5.14.2 2012-05-25 Log::Dispatch::Output(3pm)