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package KiokuDB::Backend::Memcachedb;
use Moose;
use Data::Stream::Bulk::Util qw(bulk);
use Cache::Memcached;
use namespace::clean -except => 'meta';
use Carp;
our $VERSION = "0.01";
with qw(
KiokuDB::Backend
KiokuDB::Backend::Serialize::Delegate
KiokuDB::Backend::Role::UnicodeSafe
KiokuDB::Backend::Role::TXN::Memory
KiokuDB::Backend::Role::Concurrency::POSIX
);
has create => (
isa => "Bool",
is => "ro",
default => 0,
);
sub BUILD {
my $self = shift;
}
has db => (
isa => "Cache::Memcached",
is => "ro",
handles => [qw(document)],
);
sub new_from_dsn_params {
my ( $self, %args ) = @_;
my $servers = delete $args{ servers };
my @servers = split /,/, $servers;
my $db = Cache::Memcached->new( { 'servers' => \@servers } );
$self->new( %args, db => $db );
}
sub insert {
my ( $self, @entries ) = @_;
my $db = $self->db;
foreach my $entry ( @entries ) {
$db->set( $entry->id, $self->serialize( $entry ) );
}
}
sub get {
my ( $self, @ids ) = @_;
my $db = $self->db;
my @objs = map { $self->deserialize( $db->get( $_ ) ) } @ids;
scalar @objs == 1 ? return shift @objs : @objs;
}
sub commit_entries {
my ( $self, @entries ) = @_;
my $db = $self->db;
my @checks = $self->exists( map { $_->id } @entries );
foreach my $entry ( @entries ) {
my $id = $entry->id;
my $status = shift @checks;
if ( $entry->deleted ) {
if ( !$status ) {
croak "Entry $id doesn't exist in the database";
}
$db->delete( $id );
} else {
if ( $status and not $entry->has_prev ) {
croak "Entry $id already exists in the database";
}
$db->set( $id, $self->serialize( $entry ) );
}
}
}
sub exists {
my ( $self, @ids ) = @_;
my $check = $self->db->get_multi( @ids );
map { exists $check->{ $_ } ? 1 : 0 } @ids;
}
sub delete {
my ($self, @ids_or_entries) = @_;
my @ids = map { ref($_) ? $_->id : $_ } @ids_or_entries;
$self->db->delete($_) foreach (@ids);
}
__PACKAGE__->meta->make_immutable;
__PACKAGE__
__END__
=pod
=head1 NAME
KiokuDB::Backend::Memcachedb - Memcachedb backend for L<KiokuDB>
=head1 SYNOPSIS
KiokuDB->connect(
"memcachedb:servers=127.0.0.1:112200,127.0.0.1:112222"
);
=head1 DESCRIPTION
This backend provides L<KiokuDB> support for Memcachedb using
L<Cache::Memcached>
=head1 ATTRIBUTES
=over 4
=item db
An L<Cache::Memcachedb> instance.
Required.
=back
=head1 VERSION CONTROL
L<http://github.com/franckcuny/kiokudb-backend-memcachedb>
=head1 AUTHOR
Nils Grunwald E<lt>nils.grunwald@rtgi.frE<gt>
Franck Cuny E<lt>franck.cuny@rtgi.frE<gt>
=head1 COPYRIGHT
Copyright (c) 2009, nils grunwald, franck cuny, RTGI. All
rights reserved This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
=cut
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