+++ /dev/null
-package DBIx::Class::Storage::DBI::Replication;
-
-use strict;
-use warnings;
-
-use DBIx::Class::Storage::DBI;
-use DBD::Multi;
-use base qw/Class::Accessor::Fast/;
-
-__PACKAGE__->mk_accessors( qw/read_source write_source/ );
-
-=head1 NAME
-
-DBIx::Class::Storage::DBI::Replication - EXPERIMENTAL Replicated database support
-
-=head1 SYNOPSIS
-
- # change storage_type in your schema class
- $schema->storage_type( '::DBI::Replication' );
- $schema->connect_info( [
- [ "dbi:mysql:database=test;hostname=master", "username", "password", { AutoCommit => 1 } ], # master
- [ "dbi:mysql:database=test;hostname=slave1", "username", "password", { priority => 10 } ], # slave1
- [ "dbi:mysql:database=test;hostname=slave2", "username", "password", { priority => 10 } ], # slave2
- [ $dbh, '','', {priority=>10}], # add in a preexisting database handle
- [ sub { DBI->connect }, '', '', {priority=>10}], # DBD::Multi will call this coderef for connects
- <...>,
- { limit_dialect => 'LimitXY' } # If needed, see below
- ] );
-
-=head1 DESCRIPTION
-
-Warning: This class is marked EXPERIMENTAL. It works for the authors but does
-not currently have automated tests so your mileage may vary.
-
-This class implements replicated data store for DBI. Currently you can define
-one master and numerous slave database connections. All write-type queries
-(INSERT, UPDATE, DELETE and even LAST_INSERT_ID) are routed to master
-database, all read-type queries (SELECTs) go to the slave database.
-
-For every slave database you can define a priority value, which controls data
-source usage pattern. It uses L<DBD::Multi>, so first the lower priority data
-sources used (if they have the same priority, the are used randomized), than
-if all low priority data sources fail, higher ones tried in order.
-
-=head1 CONFIGURATION
-
-=head2 Limit dialect
-
-If you use LIMIT in your queries (effectively, if you use
-SQL::Abstract::Limit), do not forget to set up limit_dialect (perldoc
-SQL::Abstract::Limit) by passing it as an option in the (optional) hash
-reference to connect_info. DBIC can not set it up automatically, since it can
-not guess DBD::Multi connection types.
-
-=cut
-
-sub new {
- my $proto = shift;
- my $class = ref( $proto ) || $proto;
- my $self = {};
-
- bless( $self, $class );
-
- $self->write_source( DBIx::Class::Storage::DBI->new );
- $self->read_source( DBIx::Class::Storage::DBI->new );
-
- return $self;
-}
-
-sub all_sources {
- my $self = shift;
-
- my @sources = ($self->read_source, $self->write_source);
-
- return wantarray ? @sources : \@sources;
-}
-
-sub connect_info {
- my( $self, $source_info ) = @_;
-
- my( $info, $global_options, $options, @dsns );
-
- $info = [ @$source_info ];
-
- $global_options = ref $info->[-1] eq 'HASH' ? pop( @$info ) : {};
- if( ref( $options = $info->[0]->[-1] ) eq 'HASH' ) {
- # Local options present in dsn, merge them with global options
- map { $global_options->{$_} = $options->{$_} } keys %$options;
- pop @{$info->[0]};
- }
-
- # We need to copy-pass $global_options, since connect_info clears it while
- # processing options
- $self->write_source->connect_info( @{$info->[0]}, { %$global_options } );
-
- ## allow either a DSN string or an already connect $dbh. Just remember if
- ## you use the $dbh option then DBD::Multi has no idea how to reconnect in
- ## the event of a failure.
-
- @dsns = map {
- ## if the first element in the arrayhash is a ref, make that the value
- my $db = ref $_->[0] ? $_->[0] : $_;
- ($_->[3]->{priority} || 10) => $db;
- } @{$info->[0]}[1..@{$info->[0]}-1];
-
- $global_options->{dsns} = \@dsns;
-
- $self->read_source->connect_info( [ 'dbi:Multi:', undef, undef, { %$global_options } ] );
-}
-
-sub select {
- shift->read_source->select( @_ );
-}
-sub select_single {
- shift->read_source->select_single( @_ );
-}
-sub throw_exception {
- shift->read_source->throw_exception( @_ );
-}
-sub sql_maker {
- shift->read_source->sql_maker( @_ );
-}
-sub columns_info_for {
- shift->read_source->columns_info_for( @_ );
-}
-sub sqlt_type {
- shift->read_source->sqlt_type( @_ );
-}
-sub create_ddl_dir {
- shift->read_source->create_ddl_dir( @_ );
-}
-sub deployment_statements {
- shift->read_source->deployment_statements( @_ );
-}
-sub datetime_parser {
- shift->read_source->datetime_parser( @_ );
-}
-sub datetime_parser_type {
- shift->read_source->datetime_parser_type( @_ );
-}
-sub build_datetime_parser {
- shift->read_source->build_datetime_parser( @_ );
-}
-
-sub limit_dialect { $_->limit_dialect( @_ ) for( shift->all_sources ) }
-sub quote_char { $_->quote_char( @_ ) for( shift->all_sources ) }
-sub name_sep { $_->quote_char( @_ ) for( shift->all_sources ) }
-sub disconnect { $_->disconnect( @_ ) for( shift->all_sources ) }
-sub set_schema { $_->set_schema( @_ ) for( shift->all_sources ) }
-
-sub DESTROY {
- my $self = shift;
-
- undef $self->{write_source};
- undef $self->{read_sources};
-}
-
-sub last_insert_id {
- shift->write_source->last_insert_id( @_ );
-}
-sub insert {
- shift->write_source->insert( @_ );
-}
-sub update {
- shift->write_source->update( @_ );
-}
-sub update_all {
- shift->write_source->update_all( @_ );
-}
-sub delete {
- shift->write_source->delete( @_ );
-}
-sub delete_all {
- shift->write_source->delete_all( @_ );
-}
-sub create {
- shift->write_source->create( @_ );
-}
-sub find_or_create {
- shift->write_source->find_or_create( @_ );
-}
-sub update_or_create {
- shift->write_source->update_or_create( @_ );
-}
-sub connected {
- shift->write_source->connected( @_ );
-}
-sub ensure_connected {
- shift->write_source->ensure_connected( @_ );
-}
-sub dbh {
- shift->write_source->dbh( @_ );
-}
-sub txn_begin {
- shift->write_source->txn_begin( @_ );
-}
-sub txn_commit {
- shift->write_source->txn_commit( @_ );
-}
-sub txn_rollback {
- shift->write_source->txn_rollback( @_ );
-}
-sub sth {
- shift->write_source->sth( @_ );
-}
-sub deploy {
- shift->write_source->deploy( @_ );
-}
-
-
-sub debugfh { shift->_not_supported( 'debugfh' ) };
-sub debugcb { shift->_not_supported( 'debugcb' ) };
-
-sub _not_supported {
- my( $self, $method ) = @_;
-
- die "This Storage does not support $method method.";
-}
-
-=head1 SEE ALSO
-
-L<DBI::Class::Storage::DBI>, L<DBD::Multi>, L<DBI>
-
-=head1 AUTHOR
-
-Norbert Csongrádi <bert@cpan.org>
-
-Peter Siklósi <einon@einon.hu>
-
-=head1 LICENSE
-
-You may distribute this code under the same terms as Perl itself.
-
-=cut
-
-1;
projects / dbsrgits/DBIx-Class.git / blobdiff