Name

DBIx::Connector::Driver - Database-specific connection interface

Description

Some of the things that DBIx::Connector does are implemented differently by different drivers, or the official interface provided by the DBI may not be implemented for a particular driver. The driver-specific code therefore is encapsulated in this separate driver class.

Most of the DBI drivers work uniformly, so in most cases the implementation provided here in DBIx::Connector::Driver will work just fine. It's only when something is different that a driver subclass needs to be added. In such a case, the subclass's name is the same as the DBI driver. For example the driver for DBD::Pg is DBIx::Connector::Driver::Pg and the driver for DBD::mysql is DBIx::Connector::Driver::mysql.

If you're just a user of DBIx::Connector, you can ignore the driver classes. DBIx::Connector uses them internally to do its magic, so you needn't worry about them.

Interface

In case you need to implement a driver, here's the interface you can modify.

Constructor

"new"

  my $driver = DBIx::Connector::Driver->new( $driver );

Constructs and returns a driver object. Each driver class is implemented as a singleton, so the same driver object is always returned for the same driver. The "driver" parameter should be a Perl DBI driver name, such as "Pg" for DBD::Pg or "SQLite" for DBD::SQLite. If a subclass has been defined for $driver, then the object will be of that class. Otherwise it will be an instance of the driver base class.

Instance Methods

"ping"

  $driver->ping($dbh);

Calls "$dbh->ping". Override if for some reason the DBI driver doesn't do it right.

"begin_work"

  $driver->begin_work($dbh);

Calls "$dbh->begin_work". Override if for some reason the DBI driver doesn't do it right.

"commit"

  $driver->commit($dbh);

Calls "$dbh->commit". Override if for some reason the DBI driver doesn't do it right.

"rollback"

  $driver->rollback($dbh);

Calls "$dbh->rollback". Override if for some reason the DBI driver doesn't do it right.

"savepoint"

  $driver->savepoint($dbh, $name);

A no-op. Override if your database does in fact support savepoints. The driver subclass should create a savepoint with the given $name. See the implementations in DBIx::Connector::Driver::Pg and DBIx::Connector::Driver::Oracle for examples.

"release"

  $driver->release($dbh, $name);

A no-op. Override if your database does in fact support savepoints. The driver subclass should release the savepoint with the given $name. See the implementations in DBIx::Connector::Driver::Pg and DBIx::Connector::Driver::Oracle for examples.

"rollback_to"

  $driver->rollback_to($dbh, $name);

A no-op. Override if your database does in fact support savepoints. The driver subclass should rollback to the savepoint with the given $name. See the implementations in DBIx::Connector::Driver::Pg and DBIx::Connector::Driver::Oracle for examples.

Authors

This module was written by:

David E. Wheeler <david@kineticode.com>

It is based on code written by:

Matt S. Trout <mst@shadowcatsystems.co.uk>
Peter Rabbitson <rabbit+dbic@rabbit.us>

Copyright and License

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.