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koa2-hold-on

v0.1.2

Published

并发场景下,避免相同耗时操作`action`被重复触发,第`1`个请求触发`action`后,后续`n`个同质请求被`await`住,直到`action`执行结束,`n`个同质请求再继续执行,并直接使用`action`的结果。

Readme

背景

并发场景下,避免相同耗时操作action被重复触发,第1个请求触发action后,后续n个同质请求被await住,直到action执行结束,n个同质请求再继续执行,并直接使用action的结果。

示例

const HoldOn = require('koa2-hold-on');
const holdOn = new HoldOn();

// 判断是否进入耗时操作
const key = 'some key';
let status = holdOn.get(key);
if(status !== 'hold') {
    await holdOn.hold(key);
    await action(); // 模拟耗时操作
    await holdOn.release(key);
}
await holdOn.wait(key);
// 结束耗时操作,继续流程