public function get($id) {
		if (!isset($id)) throw new \Exception('ID for job is missing.');
		$id_file = $this->_save_path . $id;
		if (!is_file($id_file)) throw new \Exception('Job file for ID is missing.');

		// get the requested ID
		$item = json_decode(file_get_contents($id_file), true);

		return $item;
	}