Added a brief explanation about Doctrine DBAL Session Storage

cookbook/configuration/pdo_session_storage.rst

@@ -217,3 +217,79 @@ For MSSQL, the statement might look like the following:
  ALLOW_PAGE_LOCKS = ON
  ) ON [PRIMARY]
  ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
+
+Doctrine DBAL Session Storage
+-----------------------------
+
+Symfony applications can also use a Doctrine DBAL based session storage. This
+alternative implementation is very similar to the ``PdoSessionHandler`` explained
+above, but uses a Doctrine connection and thus also works with non-PDO-based
+drivers like mysqli and OCI8.
+
+The only significant disadvantage of the Doctrine DBAL session storage comparing
+it with ``PdoSessionHandler`` is that you can only configure the name of the
+table used to store sessions, but not its column names.
+
+DBAL Session Storage configuration example:
+
+.. configuration-block::
+
+ .. code-block:: yaml
+
+ # app/config/config.yml
+ framework:
+ session:
+ # ...
+ handler_id: session.handler.dbal
+
+ parameters:
+ dbal_session_table: session
+
+ services:
+ # ...
+ session.handler.dbal:
+ class: Symfony\Bridge\Doctrine\HttpFoundation\DbalSessionHandler
+ arguments: ["@doctrine.dbal.default_connection", "%dbal_session_table%"]
+
+ .. code-block:: xml
+
+ <!-- app/config/config.xml -->
+ <framework:config>
+ <!-- ... -->
+ <framework:session handler-id="session.handler.dbal" cookie-lifetime="3600" auto-start="true"/>
+ </framework:config>
+
+ <parameters>
+ <!-- ... -->
+ <parameter key="dbal_session_table">session</parameter>
+ </parameters>
+
+ <services>
+ <!-- ... -->
+ <service id="session.handler.dbal" class="Symfony\Bridge\Doctrine\HttpFoundation\DbalSessionHandler">
+ <argument type="service" id="doctrine.dbal.default_connection" />
+ <argument>%dbal_session_table%</argument>
+ </service>
+ </services>
+
+ .. code-block:: php
+
+ // app/config/config.php
+ use Symfony\Component\DependencyInjection\Definition;
+ use Symfony\Component\DependencyInjection\Reference;
+
+ $container->loadFromExtension('framework', array(
+ ...,
+ 'session' => array(
+ // ...,
+ 'handler_id' => 'session.handler.dbal',
+ ),
+ ));
+
+ $container->setParameter('pdo.dbal_session_table', 'sess');
+
+ $storageDefinition = new Definition('Symfony\Bridge\Doctrine\HttpFoundation\DbalSessionHandler', array(
+ new Reference('doctrine.dbal.default_connection'),
+ '%dbal_session_table%',
+ ));
+ $container->setDefinition('session.handler.dbal', $storageDefinition);