A method of building a distributed lock for a redis database

Abstract

The present invention relates to the method for building the distributed lock that is used for Redis database, comprises: A. create dead letter exchange and directly connected exchange in RabbitMQ, and create dead letter queue and distributed lock queue, dead letter queue and dead letter exchange Binding, the distributed lock queue is bound to the dead letter switch and the directly connected switch respectively; B. Define the tool class based on Redssion for acquiring and releasing the distributed lock; C. Define the consumer of the dead letter queue D. Call the lock method in the tool class to get the result of whether the lock is successful; E. If the lock is successful, execute the business code; if the lock fails, exit and execute the business code; F. Release the lock. The present invention can meet the performance requirements in high concurrency scenarios, and solves the problems of the lock expiration time mechanism based on the Redis database and the early release of locks caused by the expiration time setting being too long or too short, and realizes high availability.

Description

technical field [0001] The invention relates to a method for constructing a distributed lock in a distributed system, in particular to a method for constructing a distributed lock for a Redis database. Background technique [0002] In the distributed application scenario, sometimes it is necessary to ensure that a resource can only be modified by the same operator at the same time, so the concept and technology of distributed locks are introduced. In order to implement distributed locks, several commonly used methods are: [0003] 1. Realize distributed lock based on database: [0004] step: [0005] 1) Create a lock table in the database to record the locks held by each thread; [0006] 2) When acquiring the lock, add a record to the lock table; [0007] 3) When releasing the lock, delete this record; [0008] shortcoming: [0009] 1) The performance cannot meet the demands of high concurrency scenarios; [0010] 2) In order to improve availability and solve single-p...

AI Technical Summary

Problems solved by technology

[0027] The present invention provides a method for constructing a distributed lock for a Redis database to reduce the risk of deadlock, solve problems such as early release of locks, improve concurrency performance, and achieve high availability (High Availability)

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