Summary of interface idempotent solutions

Database unique primary keys (unique indexes) use distributed ids as primary keys to ensure global uniqueness of ids
Pessimistic lock database row lock InnoDB engine
Optimistic lock version Version number
The state machine determines that the number of rows affected by the order status and updateSql statement is 0
The downstream generates a distributed ID to initiate a request, and the server determines repeated requests in combination with setNx
Duplicate Token Token

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