Talk about idempotent design

Preface

Hello everyone , Today, let's talk about idempotent design .

1. What is idempotent
2. Why idempotent is needed
3. Interface timeout , How to deal with it ？
4. How to design idempotent ？
5. Implement idempotent 8 Kind of plan
6. HTTP Idempotent of

1. What is idempotent ?

Idempotent is a mathematical and computer science concept .

• In mathematics , The idempotent function expression is ：f(x) = f(f(x)). For example, the function of absolute value , It's idempotent ,abs(x) = abs(abs(x)).
• In computer science , Idempotent means that one and more requests for a resource should have the same side effects , Or say , The impact of multiple requests is the same as that of one request execution .

This is the general idempotent processing , as follows ：

5. Implement idempotent 8 Kind of plan

The basic process of idempotent design is similar , Let's briefly talk about the implementation of idempotent 8 Medium plan, ha