75 lines
1.8 KiB
Perl
75 lines
1.8 KiB
Perl
package Logger;
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use strict;
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use Thread::Queue;
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use XML::Writer;
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use Encode qw(decode encode);
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use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
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sub new {
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my ($class) = @_;
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my $logFile = defined $ENV{LOGFILE} ? "$ENV{LOGFILE}" : "/dev/null";
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my $log = new XML::Writer(OUTPUT => new IO::File(">$logFile"));
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my $self = {
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log => $log,
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logQueue => Thread::Queue->new()
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};
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$self->{log}->startTag("logfile");
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bless $self, $class;
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return $self;
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}
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sub close {
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my ($self) = @_;
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$self->{log}->endTag("logfile");
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$self->{log}->end;
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}
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sub drainLogQueue {
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my ($self) = @_;
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while (defined (my $item = $self->{logQueue}->dequeue_nb())) {
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$self->{log}->dataElement("line", sanitise($item->{msg}), 'machine' => $item->{machine}, 'type' => 'serial');
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}
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}
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sub maybePrefix {
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my ($msg, $attrs) = @_;
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$msg = $attrs->{machine} . ": " . $msg if defined $attrs->{machine};
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return $msg;
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}
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sub nest {
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my ($self, $msg, $coderef, $attrs) = @_;
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print STDERR maybePrefix("$msg\n", $attrs);
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$self->{log}->startTag("nest");
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$self->{log}->dataElement("head", $msg, %{$attrs});
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my $now = clock_gettime(CLOCK_MONOTONIC);
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$self->drainLogQueue();
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eval { &$coderef };
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my $res = $@;
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$self->drainLogQueue();
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$self->log(sprintf("(%.2f seconds)", clock_gettime(CLOCK_MONOTONIC) - $now));
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$self->{log}->endTag("nest");
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die $@ if $@;
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}
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sub sanitise {
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my ($s) = @_;
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$s =~ s/[[:cntrl:]\xff]//g;
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$s = decode('UTF-8', $s, Encode::FB_DEFAULT);
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return encode('UTF-8', $s, Encode::FB_CROAK);
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}
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sub log {
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my ($self, $msg, $attrs) = @_;
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chomp $msg;
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print STDERR maybePrefix("$msg\n", $attrs);
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$self->drainLogQueue();
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$self->{log}->dataElement("line", $msg, %{$attrs});
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}
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1;
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