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|
#!/usr/bin/perl
package Log::Dispatch::Channels;
use strict;
use warnings;
use Log::Dispatch;
use Carp;
# ABSTRACT: Adds separate logging channels to Log::Dispatch
=head1 SYNOPSIS
use Log::Dispatch::Channels;
my $logger = Log::Dispatch::Channels->new;
$logger->add_channel('foo');
my $timestamper = sub { my %p = @_; return time . $p{message}; };
$logger->add_channel('bar', callbacks => $timestamper);
$logger->add(Log::Dispatch::File->new(channels => 'foo',
name => 'foo',
min_level => 'debug',
filename => 'foo.log'));
$logger->add(Log::Dispatch::Null->new(channels => 'bar',
name => 'bar',
min_level => 'debug'));
$logger->add(Log::Dispatch::File->new(channels => [qw/foo bar/],
name => 'errors',
min_level => 'error',
filename => 'error.log'));
$logger->log(channels => 'foo', level => 'debug',
message => 'For foo');
$logger->log(channels => 'bar', level => 'error',
message => 'For bar and errors');
=head1 DESCRIPTION
This module manages a set of Log::Dispatch objects, treating them as separate
message channels to which messages can be logged. These objects can share
Log::Dispatch::Output objects, to allow for logging to multiple places
simultaneously and automatically.
=cut
=method new
=cut
sub new {
my $class = shift;
my $self = bless {
channels => {},
outputs => {},
}, $class;
return $self;
}
=method add_channel
=cut
sub add_channel {
my $self = shift;
my $channel = shift;
carp "Channel $channel already exists!"
if exists $self->{channels}{$channel};
$self->{channels}{$channel} = Log::Dispatch->new(@_);
}
=method remove_channel
=cut
sub remove_channel {
my $self = shift;
my $channel = shift;
return delete $self->{channels}{$channel};
}
sub _forward_to_channels {
my $self = shift;
my $channels = shift;
my $method = shift;
my @channels = !defined $channels
? (keys %{ $self->{channels} })
: ref $channels
? @$channels
: ($channels);
# XXX: sort of a hack - the return value is only used by would_log, which
# just wants a boolean
my $ret = 0;
for my $channel (@channels) {
if (exists $self->{channels}{$channel}) {
my $methodret = $self->{channels}{$channel}->$method(@_);
$ret ||= $methodret;
}
else {
carp "Channel $channel doesn't exist";
}
}
return $ret;
}
=method add
=cut
sub add {
my $self = shift;
my $output = shift;
my %args = @_;
carp "Output " . $output->name . " already exists!"
if exists $self->{outputs}{$output->name};
$self->_forward_to_channels($args{channels}, 'add', $output);
$self->{outputs}{$output->name} = $output;
}
=method remove
=cut
sub remove {
my $self = shift;
my $output = shift;
my %args = @_;
$self->_forward_to_channels($args{channels}, 'remove', $output);
return delete $self->{outputs}{$output};
}
=method log
=cut
sub log {
my $self = shift;
my %args = @_;
my $channels = delete $args{channels};
$self->_forward_to_channels($channels, 'log', %args);
}
=method log_and_die
=cut
sub log_and_die {
my $self = shift;
my %args = @_;
my $channels = delete $args{channels};
$self->_forward_to_channels($channels, 'log_and_die', %args);
}
=method log_and_croak
=cut
sub log_and_croak {
my $self = shift;
my %args = @_;
my $channels = delete $args{channels};
$self->_forward_to_channels($channels, 'log_and_croak', %args);
}
=method log_to
=cut
sub log_to {
my $self = shift;
my %args = @_;
my $output = delete $args{name};
$self->{outputs}{$output}->log(%args);
}
=method would_log
=cut
sub would_log {
my $self = shift;
my $level = shift;
my %args = @_;
my $channels = delete $args{channels};
return $self->_forward_to_channels($channels, 'would_log', $level);
}
=method output
=cut
sub output {
my $self = shift;
my $output = shift;
return $self->{outputs}{$output} if exists $self->{outputs}{$output};
return undef;
}
=method channel
=cut
sub channel {
my $self = shift;
my $channel = shift;
return $self->{channels}{$channel} if exists $self->{channels}{$channel};
return undef;
}
1;
|
