Log::Dispatch::Output(User Contributed Perl DocumentLog::Dispatch::Output(3pm)
NAME
Log::Dispatch::Output - Base class for all Log::Dispatch::* objects
VERSION
version 2.70
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
This class provides the following methods:
$output->_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
from the passed parameters It also sets up two other attributes which
are used by other Log::Dispatch::Output methods, level_names and
level_numbers. Subclasses will perform parameter validation in this
method, and must also call the superclass's method.
$output->name
Returns the object's name.
$output->min_level
Returns the object's minimum log level.
$output->max_level
Returns the object's maximum log level.
$output->accepted_levels
Returns a list of the object's accepted levels (by name) from minimum
to maximum.
$output->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.
$output->_should_log ($)
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.
$output->_level_as_number ($)
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.
$output->add_callback( $code )
Adds a callback (like those given during construction). It is added to
the end of the list of callbacks.
$dispatch->remove_callback( $code )
Remove the given callback from 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 described above.
The actual logging implementation should be done in a "log_message"
method that you write. Do not override "log"!.
SUPPORT
Bugs may be submitted at
<https://github.com/houseabsolute/Log-Dispatch/issues>.
I am also usually active on IRC as 'autarch' on "irc://irc.perl.org".
SOURCE
The source code repository for Log-Dispatch can be found at
<https://github.com/houseabsolute/Log-Dispatch>.
AUTHOR
Dave Rolsky <autarch@urth.org>
COPYRIGHT AND LICENSE
This software is Copyright (c) 2020 by Dave Rolsky.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
The full text of the license can be found in the LICENSE file included
with this distribution.
perl v5.30.3 2020-07-23 Log::Dispatch::Output(3pm)
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