How to use Zend 2 save handler DbTableGateway?

Question

The Zend\\Session Save Handler tutorial gives an example for DbTableGateway in which they create a TableGateway with an undefined $adapter variable. I want to use the handler to

Answer 1

The answer turned out to be like newage's answer:

Since newage edited his answer to include the db adapter, I've accepted it as the right answer. The rest of this is just my implementation:

You can remove all the TableGateway and savehandler logic from the bootstrapSession method and put it in the getServiceConfig method.

Add the definition for Adapter to the 'factories' array in getServiceConfig, then modify the 'Zend\Session\SessionManager' function to include the Adapter, TableGateway, and save handler. This is what the new getServiceConfig would look like:

public function getServiceConfig()
{
    return array(
        'factories' => array(

            // New code here
            'Zend\Db\Adapter\Adapter' => 'Zend\Db\Adapter\AdapterServiceFactory',
            // New code here

            'Zend\Session\SessionManager' => function ($sm) {
                $config = $sm->get('config');
                if (isset($config['session'])) {
                    $session = $config['session'];

                    $sessionConfig = null;
                    if (isset($session['config'])) {
                        $class = isset($session['config']['class'])  ? $session['config']['class'] : 'Zend\Session\Config\SessionConfig';
                        $options = isset($session['config']['options']) ? $session['config']['options'] : array();
                        $sessionConfig = new $class();
                        $sessionConfig->setOptions($options);
                    }

                    $sessionStorage = null;
                    if (isset($session['storage'])) {
                        $class = $session['storage'];
                        $sessionStorage = new $class();
                    }

                    $sessionSaveHandler = null;
                    if (isset($session['save_handler'])) {
                        // class should be fetched from service manager since it will require constructor arguments
                        $sessionSaveHandler = $sm->get($session['save_handler']);
                    }
                    $sessionManager = new SessionManager();
                }

                // New code here
                /* @var $adapter \Zend\Db\Adapter\Adapter */
                $adapter = $sm->get('Zend\Db\Adapter\Adapter');
                $tableGateway = new TableGateway('mytablename', $adapter);
                $saveHandler  = new DbTableGateway($tableGateway, new DbTableGatewayOptions());
                $sessionManager->setSaveHandler($saveHandler);
                // New code here

                Container::setDefaultManager($sessionManager);
                return $sessionManager;
            },
        ),
    );
}

Then add the database connection info to the module's config file:

return array(
    // ...
    'db' => array(
        'driver'         => 'Pdo',
        'dsn'            => 'mysql:dbname=mydbname;host=mydbhost;port=xxxx',
        'driver_options' => array(
            PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
        ),
        'username'       => 'dbusername',
        'password'       => 'dbpassword',
    ),
);