Profile of DBIx/Class/ResultSourceHandle.pm

Filename	/usr/share/perl5/DBIx/Class/ResultSourceHandle.pm
Statements	Executed 0 statements in 0s

Subroutines
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
1	1	1	17µs	46µs	DBIx::Class::ResultSourceHandle::BEGIN@12
1	1	1	14µs	26µs	DBIx::Class::ResultSourceHandle::BEGIN@3
1	1	1	10µs	38µs	DBIx::Class::ResultSourceHandle::BEGIN@8
1	1	1	10µs	50µs	DBIx::Class::ResultSourceHandle::BEGIN@6
1	1	1	9µs	140µs	DBIx::Class::ResultSourceHandle::BEGIN@9
1	1	1	8µs	16µs	DBIx::Class::ResultSourceHandle::BEGIN@4
0	0	0	0s	0s	DBIx::Class::ResultSourceHandle::STORABLE_freeze
0	0	0	0s	0s	DBIx::Class::ResultSourceHandle::STORABLE_thaw
0	0	0	0s	0s	DBIx::Class::ResultSourceHandle::__ANON__[:115]
0	0	0	0s	0s	DBIx::Class::ResultSourceHandle::__ANON__[:12]
0	0	0	0s	0s	DBIx::Class::ResultSourceHandle::::newDBIx::Class::ResultSourceHandle::new
0	0	0	0s	0s	DBIx::Class::ResultSourceHandle::resolve

Call graph for these subroutines as a Graphviz dot language file.

Line	Calls	Time in subs	Code
1			package DBIx::Class::ResultSourceHandle;
2
3	2	37µs	# spent 26µs (14+11) within DBIx::Class::ResultSourceHandle::BEGIN@3 which was called: # once (14µs+11µs) by DBIx::Class::ResultSource::BEGIN@9 at line 3 use strict; # spent 26µs making 1 call to DBIx::Class::ResultSourceHandle::BEGIN@3 # spent 11µs making 1 call to strict::import
4	2	23µs	# spent 16µs (8+7) within DBIx::Class::ResultSourceHandle::BEGIN@4 which was called: # once (8µs+7µs) by DBIx::Class::ResultSource::BEGIN@9 at line 4 use warnings; # spent 16µs making 1 call to DBIx::Class::ResultSourceHandle::BEGIN@4 # spent 7µs making 1 call to warnings::import
5
6	2	50µs	# spent 50µs (10+40) within DBIx::Class::ResultSourceHandle::BEGIN@6 which was called: # once (10µs+40µs) by DBIx::Class::ResultSource::BEGIN@9 at line 6 use base qw/DBIx::Class/; # spent 50µs making 1 call to DBIx::Class::ResultSourceHandle::BEGIN@6 # spent 40µs making 1 call to base::import, recursion: max depth 1, sum of overlapping time 40µs
7
8	2	66µs	# spent 38µs (10+28) within DBIx::Class::ResultSourceHandle::BEGIN@8 which was called: # once (10µs+28µs) by DBIx::Class::ResultSource::BEGIN@9 at line 8 use Try::Tiny; # spent 38µs making 1 call to DBIx::Class::ResultSourceHandle::BEGIN@8 # spent 28µs making 1 call to Exporter::import
9	2	271µs	# spent 140µs (9+131) within DBIx::Class::ResultSourceHandle::BEGIN@9 which was called: # once (9µs+131µs) by DBIx::Class::ResultSource::BEGIN@9 at line 9 use namespace::clean; # spent 140µs making 1 call to DBIx::Class::ResultSourceHandle::BEGIN@9 # spent 131µs making 1 call to namespace::clean::import
10
11			use overload
12			# spent 46µs (17+29) within DBIx::Class::ResultSourceHandle::BEGIN@12 which was called: # once (17µs+29µs) by DBIx::Class::ResultSource::BEGIN@9 at line 13 q/""/ => sub { __PACKAGE__ . ":" . shift->source_moniker; },
13	2	75µs	fallback => 1; # spent 46µs making 1 call to DBIx::Class::ResultSourceHandle::BEGIN@12 # spent 29µs making 1 call to overload::import
14
15	1	192µs	__PACKAGE__->mk_group_accessors('simple' => qw/schema source_moniker _detached_source/); # spent 192µs making 1 call to Class::Accessor::Grouped::mk_group_accessors
16
17			# Schema to use when thawing.
18			our $thaw_schema;
19
20			=head1 NAME
21
22			DBIx::Class::ResultSourceHandle - Serializable pointers to ResultSource instances
23
24			=head1 DESCRIPTION
25
26			Currently instances of this class are used to allow proper serialization of
27			L<ResultSources\|DBIx::Class::ResultSource> (which may contain unserializable
28			elements like C<CODE> references).
29
30			Originally this module was used to remove the fixed link between
31			L<Rows\|DBIx::Class::Row>/L<ResultSets\|DBIx::Class::ResultSet> and the actual
32			L<result source objects\|DBIx::Class::ResultSource> in order to obviate the need
33			of keeping a L<schema instance\|DBIx::Class::Schema> constantly in scope, while
34			at the same time avoiding leaks due to circular dependencies. This is however
35			no longer needed after introduction of a proper mutual-assured-destruction
36			contract between a C<Schema> instance and its C<ResultSource> registrants.
37
38			=head1 METHODS
39
40			=head2 new
41
42			=cut
43
44			sub new {
45			my ($class, $args) = @_;
46			my $self = bless $args, ref $class \|\| $class;
47
48			unless( ($self->{schema} \|\| $self->{_detached_source}) && $self->{source_moniker} ) {
49			my $err = 'Expecting a schema instance and a source moniker';
50			$self->{schema}
51			? $self->{schema}->throw_exception($err)
52			: DBIx::Class::Exception->throw($err)
53			}
54
55			$self;
56			}
57
58			=head2 resolve
59
60			Resolve the moniker into the actual ResultSource object
61
62			=cut
63
64			sub resolve {
65			return $_[0]->{schema}->source($_[0]->source_moniker) if $_[0]->{schema};
66
67			$_[0]->_detached_source \|\| DBIx::Class::Exception->throw( sprintf (
68			# vague error message as this is never supposed to happen
69			"Unable to resolve moniker '%s' - please contact the dev team at %s",
70			$_[0]->source_moniker,
71			DBIx::Class::_ENV_::HELP_URL,
72			), 'full_stacktrace');
73			}
74
75			=head2 STORABLE_freeze
76
77			Freezes a handle.
78
79			=cut
80
81			sub STORABLE_freeze {
82			my ($self, $cloning) = @_;
83
84			my $to_serialize = { %$self };
85
86			delete $to_serialize->{schema};
87			delete $to_serialize->{_detached_source};
88			$to_serialize->{_frozen_from_class} = $self->{schema}
89			? $self->{schema}->class($self->source_moniker)
90			: $self->{_detached_source}->result_class
91			;
92
93			Storable::nfreeze($to_serialize);
94			}
95
96			=head2 STORABLE_thaw
97
98			Thaws frozen handle. Resets the internal schema reference to the package
99			variable C<$thaw_schema>. The recommended way of setting this is to use
100			C<< $schema->thaw($ice) >> which handles this for you.
101
102			=cut
103
104			sub STORABLE_thaw {
105			my ($self, $cloning, $ice) = @_;
106			%$self = %{ Storable::thaw($ice) };
107
108			my $from_class = delete $self->{_frozen_from_class};
109
110			if( $thaw_schema ) {
111			$self->schema( $thaw_schema );
112			}
113			elsif( my $rs = $from_class->result_source_instance ) {
114			# in the off-chance we are using CDBI-compat and have leaked $schema already
115			if( my $s = try { $rs->schema } ) {
116			$self->schema( $s );
117			}
118			else {
119			$rs->source_name( $self->source_moniker );
120			$rs->{_detached_thaw} = 1;
121			$self->_detached_source( $rs );
122			}
123			}
124			else {
125			DBIx::Class::Exception->throw(
126			"Thaw failed - original result class '$from_class' does not exist on this system"
127			);
128			}
129			}
130
131			=head1 FURTHER QUESTIONS?
132
133			Check the list of L<additional DBIC resources\|DBIx::Class/GETTING HELP/SUPPORT>.
134
135			=head1 COPYRIGHT AND LICENSE
136
137			This module is free software L<copyright\|DBIx::Class/COPYRIGHT AND LICENSE>
138			by the L<DBIx::Class (DBIC) authors\|DBIx::Class/AUTHORS>. You can
139			redistribute it and/or modify it under the same terms as the
140			L<DBIx::Class library\|DBIx::Class/COPYRIGHT AND LICENSE>.
141
142			=cut
143
144	1	87µs	1; # spent 87µs making 1 call to B::Hooks::EndOfScope::XS::__ANON__