短語詞組短語Versioning for optimistic locking 樂觀鎖定版本控制Pessimistic and Optimistic Locking 消極鎖和樂觀鎖optimistic locking algorithm based 樂觀鎖機(jī)制Optimistic locking using check -and-set 樂觀鎖 返回 optimistic locking