docs: @Override
  	/**
  	 * @see io.leopard.data.memcache.Memcache#add(String, String)
  	 */
  	public boolean add(String key, String value) {
  		this.checkKey(key);
  		boolean success = this.getMcc().add(key, value);
  		// if (!success) {
  		// logger.error("key:" + key + " success:" + success + " value:" + value);
  		// }
  		return success;
  	}