Module_Cache::__construct

public function __construct($name = null)
{
    $this->load_config($name);

    if ($this->config['driver']==Cache::DRIVER_FILE)
    {
        $this->check_file_config($name);
    }

    $driver = 'Cache_Driver_' . $this->config['driver'];
    if (!class_exists($driver, true))
    {
        throw new Exception(__('The :type driver :driver does not exist', array(':type'=>'Cache', ':driver'=>$this->config['driver'])));
    }

    $this->driver = new $driver($this->config['driver_config']);

    # 设置前缀
    if ($this->config['prefix'])
    {
        $this->driver->set_prefix($this->config['prefix']);
    }
}