今日遇到一个问题是要在一个原来的 create document flow上加validation，如果validation 失败将会停止 做业务处理 create document 。
create document 有两个方法：single create document , multiple create.
旧的逻辑是 使用java 调用 store procedure singleCreate. 而且这个 store procedure 还在被其他 store procedure multipleCreate调用。
那么 validation 应该加到store procedure singleCreate 还是 java 层次。
1.加在java 层面,
优点是
逻辑易于理解，软件易于维护
缺点是
1.数据库连接量会加大，性能降低。（虽然系统的性能还不是主要问题，但是保持一种性能危机感还是必须的）因为校验的过程同样需要使用sql 验证。
2.修改store procedure singleCreate 和 multipleCreate
优点是
性能优越，容易修改
缺点是
不易于维护，使得validation 工作同时分散于 java 和 store procedure 两个层面
最后我还是向项目deadline 妥协了
把validation 加在了 store procedure 上面
validation 走在 logic process method 前面才是规范
我在方便的勾引下 走回了过程编程思想，罪过
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