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Talk about the essence of interface idempotent and consumption idempotent

2022-04-23 07:59:00 【Dream river dream】

Interface idempotency and how to prevent message duplication and how to solve it ？
idempotent ： Executing multiple times has the same impact on business data as executing once
The essence ： There are no errors in the data
Solving problems from the essence , Add distributed locks before executing code , And then determine ( Determine whether data can be inserted , Whether it can be updated , Can I delete ). Since the plus distribution lock involves the of the lock key What is it? ？ Recommended service key, Not the only request ID Or the only message ID. Because there may be two different requests / All messages want to manipulate the same data , The data is not safe .

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