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package KiokuDB::LiveObjects::TXNScope;
BEGIN {
$KiokuDB::LiveObjects::TXNScope::AUTHORITY = 'cpan:NUFFIN';
}
$KiokuDB::LiveObjects::TXNScope::VERSION = '0.57';
use Moose;
# ABSTRACT: Transaction scope.
use Scalar::Util qw(weaken);
use namespace::clean -except => 'meta';
has entries => (
isa => "ArrayRef",
is => "ro",
default => sub { [] },
);
has live_objects => (
isa => "KiokuDB::LiveObjects",
is => "ro",
required => 1,
);
has parent => (
isa => __PACKAGE__,
is => "ro",
);
sub push {
my ( $self, @entries ) = @_;
my $e = $self->entries;
foreach my $entry ( @entries ) {
push @$e, $entry;
weaken($e->[-1]);
}
}
sub rollback {
my $self = shift;
$self->live_objects->rollback_entries(grep { defined } splice @{ $self->entries });
}
sub DEMOLISH {
my $self = shift;
if ( my $l = $self->live_objects ) {
if ( my $parent = $self->parent ) {
$l->_set_txn_scope($parent);
} else {
$l->_clear_txn_scope();
}
}
}
__PACKAGE__->meta->make_immutable;
__PACKAGE__
__END__
=pod
=encoding UTF-8
=head1 NAME
KiokuDB::LiveObjects::TXNScope - Transaction scope.
=head1 VERSION
version 0.57
=head1 SYNOPSIS
$txn_scope = $live_objects->new_txn;
$txn_scope->update_entries(@updated);
$txn_scope->rollback;
=head1 DESCRIPTION
This is an auxiliary class used by transaction scoping to roll back entries
updated during a transaction when it is aborted.
This is used internally in L<KiokuDB/txn_do> and should not need to be used
directly.
=head1 ATTRIBUTES
=over 4
=item entries
An ordered log of updated entries.
=back
=head1 METHODS
=over 4
=item update_entries
Called by L<KiokuDB::LiveObjects/update_entries>. Adds entries to C<entries>.
=item rollback
Calls C<KiokuDB::LiveObjects/rollback_entries> with all the recorded entries.
=back
=head1 AUTHOR
Yuval Kogman <nothingmuch@woobling.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Yuval Kogman, Infinity Interactive.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
