package DBIx::Class::Storage::DBI::Replicated;
+use warnings;
+use strict;
+
BEGIN {
- use DBIx::Class;
- die('The following modules are required for Replication ' . DBIx::Class::Optional::Dependencies->req_missing_for ('replicated') . "\n" )
- unless DBIx::Class::Optional::Dependencies->req_ok_for ('replicated');
+ require DBIx::Class::Optional::Dependencies;
+ if ( my $missing = DBIx::Class::Optional::Dependencies->req_missing_for('replicated') ) {
+ die "The following modules are required for Replicated storage support: $missing\n";
+ }
}
use Moose;
use MooseX::Types::Moose qw/ClassName HashRef Object/;
use Scalar::Util 'reftype';
use Hash::Merge;
-use List::Util qw/min max reduce/;
+use List::Util qw( min max );
use Context::Preserve 'preserve_context';
-use Try::Tiny;
use namespace::clean -except => 'meta';
-=encoding utf8
-
=head1 NAME
DBIx::Class::Storage::DBI::Replicated - BETA Replicated database support
that the Pool object should get.
my $schema = Schema::Class->clone;
- $schema->storage_type( ['::DBI::Replicated', {balancer=>'::Random'}] );
+ $schema->storage_type(['::DBI::Replicated', { balancer_type => '::Random' }]);
$schema->connection(...);
Next, you need to add in the Replicants. Basically this is an array of
build_datetime_parser
last_insert_id
insert
- insert_bulk
update
delete
dbh
_parse_connect_do
savepoints
_sql_maker_opts
+ _use_multicolumn_in
_conn_pid
_dbh_autocommit
_native_data_type
_get_dbh
sql_maker_class
+ insert_bulk
+ _insert_bulk
_execute
_do_query
_dbh_execute
unimplemented => [qw/
_arm_global_destructor
_verify_pid
+ __delicate_rollback
get_use_dbms_capability
set_use_dbms_capability
set_dbms_capability
_dbh_details
_dbh_get_info
+ _get_rdbms_name
+ _get_server_version
+ _server_info
_determine_connector_driver
+ _extract_driver_from_connect_info
_describe_connection
_warn_undetermined_driver
# the capability framework
# not sure if CMOP->initialize does evil things to DBIC::S::DBI, fix if a problem
grep
- { $_ =~ /^ _ (?: use | supports | determine_supports ) _ /x }
+ { $_ =~ /^ _ (?: use | supports | determine_supports ) _ /x and $_ ne '_use_multicolumn_in' }
( Class::MOP::Class->initialize('DBIx::Class::Storage::DBI')->get_all_method_names )
)],
};
-if (DBIx::Class::_ENV_::DBICTEST) {
+# this only happens during DBIC-internal testing
+if ( $INC{"t/lib/ANFANG.pm"} ) {
my $seen;
for my $type (keys %$method_dispatch) {
for my $method (@{$method_dispatch->{unimplemented}}) {
__PACKAGE__->meta->add_method($method, sub {
my $self = shift;
- $self->throw_exception("$method() must not be called on ".(blessed $self).' objects');
+ $self->throw_exception(
+ "$method() may not be called on '@{[ blessed $self ]}' objects, "
+ . 'call it on a specific pool instance instead'
+ );
});
}
=head2 read_handler
-Defines an object that implements the read side of L<BIx::Class::Storage::DBI>.
+Defines an object that implements the read side of L<DBIx::Class::Storage::DBI>.
=cut
=head2 write_handler
-Defines an object that implements the write side of L<BIx::Class::Storage::DBI>,
+Defines an object that implements the write side of L<DBIx::Class::Storage::DBI>,
as well as methods that don't write or read that can be called on only one
storage, methods that return a C<$dbh>, and any methods that don't make sense to
run on a replicant.
=head2 around: connect_replicants
All calls to connect_replicants needs to have an existing $schema tacked onto
-top of the args, since L<DBIx::Storage::DBI> needs it, and any C<connect_info>
+top of the args, since L<DBIx::Class::Storage::DBI> needs it, and any
+L<connect_info|DBIx::Class::Storage::DBI/connect_info>
options merged with the master, with replicant opts having higher priority.
=cut
my $self = shift;
my $coderef = shift;
- unless( ref $coderef eq 'CODE') {
- $self->throw_exception('Second argument must be a coderef');
- }
+ $self->throw_exception('Second argument must be a coderef')
+ unless( ref $coderef eq 'CODE');
## replace the current read handler for the remainder of the scope
local $self->{read_handler} = $self->master;
- my $args = \@_;
- return try {
- $coderef->(@$args);
- } catch {
- $self->throw_exception("coderef returned an error: $_");
- };
+ &$coderef;
}
=head2 set_reliable_storage
return min map $_->_ping, $self->all_storages;
}
-# not using the normalized_version, because we want to preserve
-# version numbers much longer than the conventional xxx.yyyzzz
-my $numify_ver = sub {
- my $ver = shift;
- my @numparts = split /\D+/, $ver;
- my $format = '%d.' . (join '', ('%06d') x (@numparts - 1));
-
- return sprintf $format, @numparts;
-};
-sub _server_info {
- my $self = shift;
-
- if (not $self->_dbh_details->{info}) {
- $self->_dbh_details->{info} = (
- reduce { $a->[0] < $b->[0] ? $a : $b }
- map [ $numify_ver->($_->{dbms_version}), $_ ],
- map $_->_server_info, $self->all_storages
- )->[1];
- }
-
- return $self->next::method;
-}
-
-sub _get_server_version {
- my $self = shift;
-
- return $self->_server_info->{dbms_version};
-}
-
=head1 GOTCHAS
Due to the fact that replicants can lag behind a master, you must take care to
make sure you use one of the methods to force read queries to a master should
you need realtime data integrity. For example, if you insert a row, and then
-immediately re-read it from the database (say, by doing $result->discard_changes)
+immediately re-read it from the database (say, by doing
+L<< $result->discard_changes|DBIx::Class::Row/discard_changes >>)
or you insert a row and then immediately build a query that expects that row
to be an item, you should force the master to handle reads. Otherwise, due to
the lag, there is no certainty your data will be in the expected state.
my $result = $resultset->search(undef, {force_pool=>'master'})->find($pk);
-This attribute will safely be ignore by non replicated storages, so you can use
+This attribute will safely be ignored by non replicated storages, so you can use
the same code for both types of systems.
Lastly, you can use the L</execute_reliably> method, which works very much like
## $new_schema will use only the Master storage for all reads/writes while
## the $schema object will use replicated storage.
-=head1 AUTHOR
-
- John Napiorkowski <john.napiorkowski@takkle.com>
-
-Based on code originated by:
+=head1 FURTHER QUESTIONS?
- Norbert Csongrádi <bert@cpan.org>
- Peter Siklósi <einon@einon.hu>
+Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
-=head1 LICENSE
+=head1 COPYRIGHT AND LICENSE
-You may distribute this code under the same terms as Perl itself.
+This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
+by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
+redistribute it and/or modify it under the same terms as the
+L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
=cut
projects / dbsrgits/DBIx-Class.git / blobdiff