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@antv/async-hook

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@antv/async-hook

the control flow for l7

  • 2.2.9
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async-hook

L7 数据流管理工具

Usage

const asyncHook = require('async-hook');

hooks

async-hook 提供了一系列的 hook 方法用于控制方法的调用

SyncHook

SyncHook 支持对一组方法的顺序调用,同时 call 方法传入的参数会传递个方法组的每个方法使用

const hook = new SyncHook();
const funcList = [
    (args) => {
        console.log(`step1 - ${args}`);
    },
    (args) =>{
        console.log(`step2 - ${args}`);
    },
    (args) =>{
        console.log(`step3 - ${args}`);
    },
];
hook.tap('test', funcList);
hook.call('call');
// step1 - call, step2 - call, step3 - call

SyncBailHook

使用方法类似 SyncHook,但是不支持 call 传值

SyncWaterfallHook

SyncWaterfallHook 支持对一组方法的顺序调用,正常情况下方法组会在执行 call 方法之后全部执行,但可以通过每个函数的返回值控制提前结束

const hook = new SyncHook();
const funcList = [
    () => { // 执行第一个函数
        console.log('step1');
        return true;
    },
    () =>{ // 上一个函数返回值为 true,继续往下执行
        // do something
        console.log('step2');
        return false
    },
    () =>{ // 上一个函数返回值为 false(void、null、undefined、0),不再往下执行
        // do something
        console.log('step3');
        return true
    },
];
hook.tap('test', funcList);
hook.call('call');
// step1, step2

AsyncSeriesHook

使用类似 SyncHook,不过方法组中都是异步方法

AsyncSeriesBailHook

使用类似 AsyncSeriesHook,但是不支持 call 传值

AsyncWaterfallHook

AsyncWaterfallHook 支持对一组异步方法的顺序调用,正常情况下方法组会在执行 call 方法之后全部执行,但可以通过每个函数的返回值控制提前结束

const hook = new AsyncWaterfallHook();
const funcList = [
    () => { // 执行第一个函数
        console.log('step1');
        return new Promise((resolve) => setTimeout(() => resolve(true), 100))
    },
    async () =>{ // 上一个函数返回值为 true,继续往下执行
        // do something
        console.log('step2');
        return true
    },
    async () =>{ // 上一个函数返回值为 true,继续往下执行
        // do something
        console.log('step3');
        return false
    },
    async () =>{ // 上一个函数返回值为 false(void、null、undefined、0),不再往下执行
        // do something
        console.log('step4');
        return true
    },
];
hook.tapPromise('test', funcList);
hook.promise();
// step1, step2, step3

AsyncParallelHook

控制一组异步方法的并行调用,类似 Promise.all

FAQs

Package last updated on 24 Oct 2022

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