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|
=head1 NAME
Log::Handler::Output - The output builder class.
=head1 DESCRIPTION
Just for internal usage!
=head1 METHODS
=head2 new()
=head2 log()
=head2 flush()
=head2 errstr()
=head1 PREREQUISITES
Carp
UNIVERSAL
Devel::Backtrace
=head1 AUTHOR
Jonny Schulz <jschulz.cpan(at)bloonix.de>.
=head1 COPYRIGHT
Copyright (C) 2007 by Jonny Schulz. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
package Log::Handler::Output;
use strict;
use warnings;
use Carp;
use UNIVERSAL;
use Devel::Backtrace;
our $VERSION = '0.04';
our $ERRSTR = '';
sub new {
my ($class, $options, $output) = @_;
my $self = bless $options, $class;
$self->{output} = $output;
return $self;
}
sub log {
my $self = shift;
my $level = shift;
my $wanted = {message=>join(' ', @_)||''};
my $output = $self->{output};
my $pattern = $self->{pattern};
my $message = { };
if ($self->{filter_caller}) {
my $caller = (caller(1+$Log::Handler::CALLER_LEVEL))[0];
return 1 if $caller !~ $self->{filter_caller};
}
foreach my $r (@{$self->{wanted_pattern}}) {
if (ref($r->{code})) {
$wanted->{$r->{name}} = &{$r->{code}}($self, $level);
} else {
$wanted->{$r->{name}} = $r->{code};
}
}
if ($self->{message_layout}) {
&{$self->{message_layout_code}}($wanted, $message);
} else {
$message->{message} = $wanted->{message};
}
if ($self->{message_pattern}) {
&{$self->{message_pattern_code}}($wanted, $message);
}
if ($self->{debug_trace} || $Log::Handler::TRACE) {
$self->_add_trace($message);
} elsif ($self->{newline} && $message->{message} =~ /.\z/) {
$message->{message} .= "\n";
}
if ($self->{filter_message}) {
$self->_filter_msg($message) or return 1;
}
if ($self->{prepare_message}) {
# each output can have an own prepare function. for this reason
# the message is passed as hash and not as a reference.
my $prepare_message = $self->_prepare_message(%$message)
or return $self->_raise_error($output->errstr);
$output->log($prepare_message)
or return $self->_raise_error($output->errstr);
} else {
$output->log($message)
or return $self->_raise_error($output->errstr);
}
return 1;
}
sub flush {
my $self = shift;
my $output = $self->{output};
if ( UNIVERSAL::can($output, 'flush') ) {
$output->flush
or return $self->_raise_error($output->errstr);
}
return 1;
}
sub errstr { $ERRSTR }
#
# private stuff
#
sub _add_trace {
my ($self, $message) = @_;
if ( $message->{message} =~ /.\z/ ) {
$message->{message} .= "\n";
}
my $bt = Devel::Backtrace->new($self->{debug_skip});
foreach my $point (reverse 0..$bt->points-1) {
$message->{message} .= ' ' x 3 . "CALL($point):";
my $caller = $bt->point($point);
foreach my $key (qw/package filename line subroutine hasargs wantarray evaltext is_require/) {
next unless defined $caller->{$key};
if ($self->{debug_mode} == 1) { # line mode
$message->{message} .= " $key($caller->{$key})";
} elsif ($self->{debug_mode} == 2) { # block mode
$message->{message} .= "\n" . ' ' x 6 . sprintf('%-12s', $key) . $caller->{$key};
}
}
$message->{message} .= "\n";
}
}
sub _prepare_message {
my $self = shift;
my $msg = {@_};
my $code = $self->{prepare_message};
eval { &$code($msg) };
return $@ ? $self->_raise_error($@) : $msg;
}
sub _filter_msg {
my ($self, $message) = @_;
my $filter = $self->{filter_message};
my $result = $filter->{result};
my $code = $filter->{code};
my $return = ();
if (!$filter->{condition}) {
$return = &$code($message) || 0;
} else {
foreach my $match ( keys %$result ) {
$result->{$match} =
$message->{message} =~ /$filter->{$match}/ || 0;
}
$return = &$code($result);
}
return $return;
}
sub _raise_error {
my $self = shift;
$ERRSTR = shift;
return undef unless $self->{die_on_errors};
my $class = ref($self);
Carp::croak "$class: $ERRSTR";
}
1;
|
