数据库事务与REST调用相结合

I have to save records to a database and then send some data to a restful web service. I need them to happen together. If one fails then the other should not happen as well. So for example, consider the following code:

我必须将记录保存到数据库，然后将一些数据发送到一个宁静的Web服务。我需要它们一起发生。如果一个失败，那么另一个也不应该发生。例如，请考虑以下代码：

saveRecords(records);
sendToRestService(records);

If saveRecords fails with a database constraint violation then I don't want the rest call to happen. I could make saveRecords happen in it's own transaction and commit it before the call to sendToRestService but there is still the potential for the rest service to be down. I could keep up with whether the rest service succeeds and if it doesn't then try to send them later. I was just wondering if there is a better strategy since this seems like it would be a common scenario.

如果saveRecords因数据库约束违规而失败，那么我不希望其余的调用发生。我可以让saveRecords在它自己的事务中发生并在调用sendToRestService之前提交它，但是仍有可能停止其余的服务。我可以跟上休息服务是否成功，如果不成功则尝试稍后发送。我只是想知道是否有更好的策略，因为这似乎是一种常见的情况。

Thanks for any advice.

谢谢你的建议。

1 个解决方案

#1

why don't you try Observer design pattern?

你为什么不尝试Observer设计模式？

I'm assuming saveRecords(records) and sendToRestService(records) methods are in two different classes.

我假设saveRecords（记录）和sendToRestService（记录）方法在两个不同的类中。

If you use Observer design pattern, you can notify the class containing sendToRestService() method in case if the calling class object changes.

如果使用Observer设计模式，则可以在调用类对象发生更改时通知包含sendToRestService（）方法的类。

Ref: Observer Design Pattern

参考：观察者设计模式

#1