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|
package Test2::EventFacet::Trace;
use strict;
use warnings;
our $VERSION = '1.302096';
BEGIN { require Test2::EventFacet; our @ISA = qw(Test2::EventFacet) }
use Test2::Util qw/get_tid pkg_to_file/;
use Carp qw/confess/;
use Test2::Util::HashBase qw{^frame ^pid ^tid ^cid -hid -nested details -buffered};
{
no warnings 'once';
*DETAIL = \&DETAILS;
*detail = \&details;
*set_detail = \&set_details;
}
sub init {
confess "The 'frame' attribute is required"
unless $_[0]->{+FRAME};
$_[0]->{+DETAILS} = delete $_[0]->{detail} if $_[0]->{detail};
$_[0]->{+PID} = $$ unless defined $_[0]->{+PID};
$_[0]->{+TID} = get_tid() unless defined $_[0]->{+TID};
}
sub snapshot {
my ($orig, @override) = @_;
bless {%$orig, @override}, __PACKAGE__;
}
sub signature {
my $self = shift;
# Signature is only valid if all of these fields are defined, there is no
# signature if any is missing. '0' is ok, but '' is not.
return join ':' => map { (defined($_) && length($_)) ? $_ : return undef } (
$self->{+CID},
$self->{+PID},
$self->{+TID},
$self->{+FRAME}->[1],
$self->{+FRAME}->[2],
);
}
sub debug {
my $self = shift;
return $self->{+DETAILS} if $self->{+DETAILS};
my ($pkg, $file, $line) = $self->call;
return "at $file line $line";
}
sub alert {
my $self = shift;
my ($msg) = @_;
warn $msg . ' ' . $self->debug . ".\n";
}
sub throw {
my $self = shift;
my ($msg) = @_;
die $msg . ' ' . $self->debug . ".\n";
}
sub call { @{$_[0]->{+FRAME}} }
sub package { $_[0]->{+FRAME}->[0] }
sub file { $_[0]->{+FRAME}->[1] }
sub line { $_[0]->{+FRAME}->[2] }
sub subname { $_[0]->{+FRAME}->[3] }
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Test2::EventFacet::Trace - Debug information for events
=head1 DESCRIPTION
The L<Test2::API::Context> object, as well as all L<Test2::Event> types need to
have access to information about where they were created. This object
represents that information.
=head1 SYNOPSIS
use Test2::EventFacet::Trace;
my $trace = Test2::EventFacet::Trace->new(
frame => [$package, $file, $line, $subname],
);
=head1 FACET FIELDS
=over 4
=item $string = $trace->{details}
=item $string = $trace->details()
Used as a custom trace message that will be used INSTEAD of
C<< at <FILE> line <LINE> >> when calling C<< $trace->debug >>.
=item $frame = $trace->{frame}
=item $frame = $trace->frame()
Get the call frame arrayref.
=item $int = $trace->{pid}
=item $int = $trace->pid()
The process ID in which the event was generated.
=item $int = $trace->{tid}
=item $int = $trace->tid()
The thread ID in which the event was generated.
=item $id = $trace->{cid}
=item $id = $trace->cid()
The ID of the context that was used to create the event.
=item $hid = $trace->{hid}
=item $hid = $trace->hid()
The ID of the hub that was current when the event was created.
=item $int = $trace->{nested}
=item $int = $trace->nested()
How deeply nested the event is.
=item $bool = $trace->{buffered}
=item $bool = $trace->buffered()
True if the event was buffered and not sent to the formatter independent of a
parent (This should never be set when nested is C<0> or C<undef>).
=back
=head1 METHODS
B<Note:> All facet frames are also methods.
=over 4
=item $trace->set_detail($msg)
=item $msg = $trace->detail
Used to get/set a custom trace message that will be used INSTEAD of
C<< at <FILE> line <LINE> >> when calling C<< $trace->debug >>.
C<detail()> is an alias to the C<details> facet field for backwards
compatibility.
=item $str = $trace->debug
Typically returns the string C<< at <FILE> line <LINE> >>. If C<detail> is set
then its value will be returned instead.
=item $trace->alert($MESSAGE)
This issues a warning at the frame (filename and line number where
errors should be reported).
=item $trace->throw($MESSAGE)
This throws an exception at the frame (filename and line number where
errors should be reported).
=item ($package, $file, $line, $subname) = $trace->call()
Get the caller details for the debug-info. This is where errors should be
reported.
=item $pkg = $trace->package
Get the debug-info package.
=item $file = $trace->file
Get the debug-info filename.
=item $line = $trace->line
Get the debug-info line number.
=item $subname = $trace->subname
Get the debug-info subroutine name.
=item $sig = trace->signature
Get a signature string that identifies this trace. This is used to check if
multiple events are related. The Trace includes pid, tid, file, line number,
and the cid which is C<'C\d+'> for traces created by a context, or C<'T\d+'>
for traces created by C<new()>.
=back
=head1 SOURCE
The source code repository for Test2 can be found at
F<http://github.com/Test-More/test-more/>.
=head1 MAINTAINERS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 AUTHORS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 COPYRIGHT
Copyright 2016 Chad Granum E<lt>exodist@cpan.orgE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See F<http://dev.perl.org/licenses/>
=cut
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