package Object::Remote::Logging::Router; use Moo; use Scalar::Util qw(weaken); use Sys::Hostname; with 'Log::Contextual::Role::Router'; with 'Object::Remote::Role::LogForwarder'; has _controller_package => ( is => 'rwp' ); #lookup table for package names that should not #be forwarded across Object::Remote connections has _connections => ( is => 'ro', required => 1, default => sub { [] } ); has _remote_metadata => ( is => 'rw' ); sub before_import { my ($self, $controller, $importer, $spec) = @_; } sub after_import { } sub _get_loggers { my ($self, %metadata) = @_; my $package = $metadata{package}; my $level = $metadata{level}; my $is_level = "is_$level"; my $need_clean = 0; my @loggers; foreach my $selector (@{$self->_connections}) { unless(defined $selector) { $need_clean = 1; next; } foreach my $logger ($selector->($package, { %metadata })) { next unless defined $logger; next unless $logger->$is_level; push(@loggers, $logger); } } $self->_clean_connections if $need_clean; return @loggers; } #overloadable so a router can invoke a logger #in a different way sub _invoke_logger { my ($self, $logger, $level_name, $content, $metadata) = @_; #Invoking the logger like this gets all available data to the #logging object with out losing any information from the structure. #This is not a backwards compatible way to invoke the loggers #but it enables a lot of flexibility in the logger. #The l-c router could have this method invoke the logger in #a backwards compatible way and router sub classes invoke #it in non-backwards compatible ways if desired $logger->$level_name($content, $metadata); } #overloadable so forwarding can have the updated #metadata but does not have to wrap get_loggers #which has too many drawbacks sub _deliver_message { my ($self, $level, $generator, $args, $metadata) = @_; my @loggers = $self->_get_loggers(%$metadata); return unless @loggers > 0; #this is the point where the user provided log message #code block is executed my @content = $generator->(@$args); foreach my $logger (@loggers) { $self->_invoke_logger($logger, $level, \@content, $metadata); } } sub handle_log_request { my ($self, $metadata_in, $generator, @args) = @_; my %metadata = %{$metadata_in}; my $level = $metadata{level}; my $package = $metadata{package}; my $need_clean = 0; #caller_level is useless when log forwarding is in place #so we won't tempt people with using it for now - access #to caller level will be available in the future my $caller_level = delete $metadata{caller_level}; $metadata{object_remote} = $self->_remote_metadata; $metadata{timestamp} = time; $metadata{pid} = $$; $metadata{hostname} = hostname; my @caller_info = caller($caller_level); $metadata{filename} = $caller_info[1]; $metadata{line} = $caller_info[2]; @caller_info = caller($caller_level + 1); $metadata{method} = $caller_info[3]; $metadata{method} =~ s/^${package}::// if defined $metadata{method}; $self->_deliver_message($level, $generator, [ @args ], \%metadata); } sub connect { my ($self, $destination, $is_weak) = @_; my $wrapped; if (ref($destination) ne 'CODE') { $wrapped = sub { $destination }; } else { $wrapped = $destination; } push(@{$self->_connections}, $wrapped); weaken($self->_connections->[-1]) if $is_weak; } sub _clean_connections { my ($self) = @_; @{$self->{_connections}} = grep { defined } @{$self->{_connections}}; } 1;