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Diffstat (limited to 'perllib/Catalyst/Log.pm')
| -rw-r--r-- | perllib/Catalyst/Log.pm | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/perllib/Catalyst/Log.pm b/perllib/Catalyst/Log.pm new file mode 100644 index 000000000..d72ee162f --- /dev/null +++ b/perllib/Catalyst/Log.pm @@ -0,0 +1,329 @@ +package Catalyst::Log; + +use Moose; +with 'MooseX::Emulate::Class::Accessor::Fast'; + +use Data::Dump; +use Class::MOP (); +use Carp qw/ cluck /; + +our %LEVELS = (); # Levels stored as bit field, ergo debug = 1, warn = 2 etc +our %LEVEL_MATCH = (); # Stored as additive, thus debug = 31, warn = 30 etc + +has level => (is => 'rw'); +has _body => (is => 'rw'); +has abort => (is => 'rw'); +has _psgi_logger => (is => 'rw', predicate => '_has_psgi_logger', clearer => '_clear_psgi_logger'); +has _psgi_errors => (is => 'rw', predicate => '_has_psgi_errors', clearer => '_clear_psgi_errors'); + +sub clear_psgi { + my $self = shift; + $self->_clear_psgi_logger; + $self->_clear_psgi_errors; +} + +sub psgienv { + my ($self, $env) = @_; + + $self->_psgi_logger($env->{'psgix.logger'}) if $env->{'psgix.logger'}; + $self->_psgi_errors($env->{'psgi.errors'}) if $env->{'psgi.errors'}; +} + + +{ + my @levels = qw[ debug info warn error fatal ]; + + my $meta = Class::MOP::get_metaclass_by_name(__PACKAGE__); + my $summed_level = 0; + for ( my $i = $#levels ; $i >= 0 ; $i-- ) { + + my $name = $levels[$i]; + + my $level = 1 << $i; + $summed_level |= $level; + + $LEVELS{$name} = $level; + $LEVEL_MATCH{$name} = $summed_level; + + $meta->add_method($name, sub { + my $self = shift; + + if ( $self->level & $level ) { + $self->_log( $name, @_ ); + } + }); + + $meta->add_method("is_$name", sub { + my $self = shift; + return $self->level & $level; + });; + } +} + +around new => sub { + my $orig = shift; + my $class = shift; + my $self = $class->$orig; + + $self->levels( scalar(@_) ? @_ : keys %LEVELS ); + + return $self; +}; + +sub levels { + my ( $self, @levels ) = @_; + $self->level(0); + $self->enable(@levels); +} + +sub enable { + my ( $self, @levels ) = @_; + my $level = $self->level; + for(map { $LEVEL_MATCH{$_} } @levels){ + $level |= $_; + } + $self->level($level); +} + +sub disable { + my ( $self, @levels ) = @_; + my $level = $self->level; + for(map { $LEVELS{$_} } @levels){ + $level &= ~$_; + } + $self->level($level); +} + +our $HAS_DUMPED; +sub _dump { + my $self = shift; + unless ($HAS_DUMPED++) { + cluck("Catalyst::Log::_dump is deprecated and will be removed. Please change to using your own Dumper.\n"); + } + $self->info( Data::Dump::dump(@_) ); +} + +sub _log { + my $self = shift; + my $level = shift; + my $message = join( "\n", @_ ); + if ($self->can('_has_psgi_logger') and $self->_has_psgi_logger) { + $self->_psgi_logger->({ + level => $level, + message => $message, + }); + } else { + $message .= "\n" unless $message =~ /\n$/; + my $body = $self->_body; + $body .= sprintf( "[%s] %s", $level, $message ); + $self->_body($body); + } +} + +sub _flush { + my $self = shift; + if ( $self->abort || !$self->_body ) { + $self->abort(undef); + } + else { + $self->_send_to_log( $self->_body ); + } + $self->_body(undef); +} + +sub _send_to_log { + my $self = shift; + if ($self->can('_has_psgi_errors') and $self->_has_psgi_errors) { + $self->_psgi_errors->print(@_); + } else { + print STDERR @_; + } +} + +# 5.7 compat code. +# Alias _body to body, add a before modifier to warn.. +my $meta = __PACKAGE__->meta; # Calling meta method here fine as we happen at compile time. +$meta->add_method('body', $meta->get_method('_body')); +my %package_hash; # Only warn once per method, per package. + # I haven't provided a way to disable them, patches welcome. +$meta->add_before_method_modifier('body', sub { + my $class = blessed(shift); + $package_hash{$class}++ || do { + warn("Class $class is calling the deprecated method Catalyst::Log->body method,\n" + . "this will be removed in Catalyst 5.81"); + }; +}); +# End 5.70 backwards compatibility hacks. + +no Moose; +__PACKAGE__->meta->make_immutable(inline_constructor => 0); + +1; + +__END__ + +=for stopwords psgienv + +=head1 NAME + +Catalyst::Log - Catalyst Log Class + +=head1 SYNOPSIS + + $log = $c->log; + $log->debug($message); + $log->info($message); + $log->warn($message); + $log->error($message); + $log->fatal($message); + + if ( $log->is_debug ) { + # expensive debugging + } + + +See L<Catalyst>. + +=head1 DESCRIPTION + +This module provides the default, simple logging functionality for Catalyst. +If you want something different set C<< $c->log >> in your application module, +e.g.: + + $c->log( MyLogger->new ); + +Your logging object is expected to provide the interface described here. +Good alternatives to consider are Log::Log4Perl and Log::Dispatch. + +If you want to be able to log arbitrary warnings, you can do something along +the lines of + + $SIG{__WARN__} = sub { MyApp->log->warn(@_); }; + +however this is (a) global, (b) hairy and (c) may have unexpected side effects. +Don't say we didn't warn you. + +=head1 LOG LEVELS + +=head2 debug + + $log->is_debug; + $log->debug($message); + +=head2 info + + $log->is_info; + $log->info($message); + +=head2 warn + + $log->is_warn; + $log->warn($message); + +=head2 error + + $log->is_error; + $log->error($message); + +=head2 fatal + + $log->is_fatal; + $log->fatal($message); + +=head1 METHODS + +=head2 new + +Constructor. Defaults to enable all levels unless levels are provided in +arguments. + + $log = Catalyst::Log->new; + $log = Catalyst::Log->new( 'warn', 'error' ); + +=head2 level + +Contains a bitmask of the currently set log levels. + +=head2 levels + +Set log levels + + $log->levels( 'warn', 'error', 'fatal' ); + +=head2 enable + +Enable log levels + + $log->enable( 'warn', 'error' ); + +=head2 disable + +Disable log levels + + $log->disable( 'warn', 'error' ); + +=head2 is_debug + +=head2 is_error + +=head2 is_fatal + +=head2 is_info + +=head2 is_warn + +Is the log level active? + +=head2 abort + +Should Catalyst emit logs for this request? Will be reset at the end of +each request. + +*NOTE* This method is not compatible with other log apis, so if you plan +to use Log4Perl or another logger, you should call it like this: + + $c->log->abort(1) if $c->log->can('abort'); + +=head2 _send_to_log + + $log->_send_to_log( @messages ); + +This protected method is what actually sends the log information to STDERR. +You may subclass this module and override this method to get finer control +over the log output. + +=head2 psgienv $env + + $log->psgienv($env); + +NOTE: This is not meant for public consumption. + +Set the PSGI environment for this request. This ensures logs will be sent to +the right place. If the environment has a C<psgix.logger>, it will be used. If +not, we will send logs to C<psgi.errors> if that exists. As a last fallback, we +will send to STDERR as before. + +=head2 clear_psgi + +Clears the PSGI environment attributes set by L</psgienv>. + +=head2 meta + +=head1 SEE ALSO + +L<Catalyst>. + +=head1 AUTHORS + +Catalyst Contributors, see Catalyst.pm + +=head1 COPYRIGHT + +This library is free software. You can redistribute it and/or modify +it under the same terms as Perl itself. + +=cut + +__PACKAGE__->meta->make_immutable; + +1; |