protected function _initMultiDbResources()
    {
        $registry = $this->getPluginResource('multidb');
        if (!$registry) {
            return;
        }

        //
        // options in configs/application
        $options = $registry->getOptions();

        foreach ($options as &$connection) {
            if ('db://' === substr($connection['dbname'], 0, 5)) {
                $connection = array_replace(
                    $connection,
                    $this->_parseDsn($connection['dbname'])
                );
            }
        }

        Zend_Registry::set('multidb', $registry->setOptions($options));
    }