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klg-redlock

v1.0.0

Published

一个基于 redis 的分布式锁

Downloads

3

Readme

klg-redlock

一个基于 redis 的分布式锁

Quick Start

准备好 redis client

let client = redis.createClient('redis://localhost:6379')

排队锁

const bufferLock = new Redlock({
  client,
  retryConfig: {
    retryCount: Math.floor(1000 * 60 * 5 / 400), // 重试次数 这里需要重试一分钟
    retryDelay: 400   // 重试间隔
  }
})

await bufferLock.using(async (lock) => {
    // code
}, {ttl: 1000 * 30, resource: 'key'})

相同 key 的操作会排队执行,遇到冲突会重试,默认重试总时长是 1 分钟,注意重试的实现是非公平的,有可能某个操作会一直无法执行,直至超时。

排他锁

const bufferLock = new Redlock({
  client,
  retryConfig: {
    retryCount: 0
  }
})

await bufferLock.using(async (lock) => {
    // code
}, {ttl: 1000 * 30, resource: 'key'})

相同 key 的操作具有排他性,遇到冲突会 throw 一个 Error 对象, message 为‘系统繁忙,请稍后再试’

Test

$ npm i
$ npm test