MooseX::LazyLogDispatch - A Logging Role for Moose


This document describes MooseX::LazyLogDispatch version 0.01


    package MyApp;
    use Moose;

    with MooseX::LazyLogDispatch;
    # or alternately, use this role instead to give your
    # class the logger methods "debug", "warning", etc...
    # with MooseX::LazyLogDispatch::Levels;

    # This part optional
    #  without it you get some default logging to the screen
    has log_dispatch_conf => (
       is => 'ro',
       isa => 'Log::Dispatch::Configurator',
       lazy => 1,
       required => 1,
       default => sub {
           my $self = shift;
           My::Configurator->new( # <- you write this class!
               file => $self->log_file,
               debug => $self->debug,

    # Here's another variant, using a Log::Dispatch::Configurator-style 
    #  hashref to configure things without an explicit subclass
    has log_dispatch_conf => (
       is => 'ro',
       isa => 'HashRef',
       lazy => 1,
       required => 1,
       default => sub {
           my $self = shift;
           return $self->debug
               ? {
                   class     => 'Log::Dispatch::Screen',
                   min_level => 'debug',
                   stderr    => 1,
                   format    => '[%p] %m at %F line %L%n',
               : {
                   class     => 'Log::Dispatch::Syslog',
                   min_level => 'info',
                   facility  => 'daemon',
                   ident     => $self->daemon_name,
                   format    => '[%p] %m',
    sub foo { 
        my ($self) = @_;
        $self->logger->debug("started foo");
        $self->logger->debug('ending foo');


Log::Dispatch role for use with your Moose classes.



This method is provided by this role, and it is an Log::Dispatch instance, which you can call level-names on, as in the debug examples in the synopsis.

If you want the level-names as direct methods in your class, you should use the MooseX::LazyLogDispatch::Levels role instead.


This is an optional attribute you can give to your class. If you define it as a hashref value, that will be interpreted in the style of the configuration hashrefs documented in Log::Dispatch::Config documents when they show examples of using Log::Dispatch::Configurator for pluggable configuration.

You can also gain greater flexibility by defining your own complete Log::Dispatch::Configurator subclass and having your log_dispatch_config attribute be an instance of this class.

By lazy-loading either one (lazy = 1>), you can have the configuration determined at runtime. This is nice if you want to change your log format and/or destination at runtime based on things like MooseX::Getopt / MooseX::Daemonize parameters.

If you don't provide this attribute, we'll default to sending everything to the screen in a reasonable debugging format.


MooseX::LazyLogDispatch::Levels MooseX::LogDispatch Log::Dispatch::Configurator Log::Dispatch::Config Log::Dispatch


Brandon Black <>

Based in part on MooseX::LogDispatch by Ash Berlin <> and <>


This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.