1 package Catalyst::Model::DBIC::Schema::Trait::Replicated;
5 use Carp::Clan '^Catalyst::Model::DBIC::Schema';
7 use Catalyst::Model::DBIC::Schema::Types 'ConnectInfos';
9 use namespace::clean -except => 'meta';
13 Catalyst::Model::DBIC::Schema::Trait::Replicated - Replicated storage support for
14 L<Catalyst::Model::DBIC::Schema>
19 traits => ['Replicated']
21 ['dbi:mysql:master', 'user', 'pass'],
23 ['dbi:mysql:slave1', 'user', 'pass'],
24 ['dbi:mysql:slave2', 'user', 'pass'],
25 ['dbi:mysql:slave3', 'user', 'pass'],
28 master_read_weight => 0.3
34 Sets your storage_type to L<DBIx::Class::Storage::DBI::Replicated> and connects
35 replicants provided in config. See that module for supported resultset
38 The default L<DBIx::Class::Storage::DBI::Replicated/balancer_type> is
42 L<DBIx::Class::Storage::DBI::Replicated::Balancer::Random/master_read_weight> to
43 C<1> by default, meaning that you have the same chance of reading from master as
44 you do from replicants. Set to C<0> to turn off reads from master.
46 =head1 CONFIG PARAMETERS
50 Array of connect_info settings for every replicant.
55 is => 'ro', isa => ConnectInfos, coerce => 1, required => 1
61 # check storage_type compatibility (if configured)
62 if (my $storage_type = $self->storage_type) {
63 my $class = $storage_type =~ /^::/ ?
64 "DBIx::Class::Storage$storage_type"
67 croak "This storage_type cannot be used with replication"
68 unless $class->isa('DBIx::Class::Storage::DBI::Replicated');
70 $self->storage_type('::DBI::Replicated');
73 $self->connect_info->{balancer_type} ||= '::Random'
74 unless $self->connect_info->{balancer_type};
76 unless ($self->connect_info->{balancer_args} &&
77 exists $self->connect_info->{balancer_args}{master_read_weight}) {
78 $self->connect_info->{balancer_args}{master_read_weight} = 1;
82 after finalize => sub {
85 $self->storage->connect_replicants(map [ $_ ], $self->replicants->flatten);
90 L<Catalyst::Model::DBIC::Schema>, L<DBIx::Class>,
91 L<DBIx::Class::Storage::DBI::Replicated>,
92 L<Cache::FastMmap>, L<DBIx::Class::Cursor::Cached>
96 Rafael Kitover, C<rkitover@cpan.org>
100 This program is free software, you can redistribute it and/or modify it
101 under the same terms as Perl itself.