public function write($priority, $message)
{
$config = $this->_config + $this->_classes;
return function ($self, $params) use($config) {
$params += array('timestamp' => strtotime('now'));
$key = $config['key'];
$key = is_callable($key) ? $key($params) : String::insert($key, $params);
$cache = $config['cache'];
return $cache::write($config['config'], $key, $params['message'], $config['expiry']);
};
}