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sub-processor

v0.0.1

Published

[![Build Status](https://travis-ci.org/MarvinWilliam/sub-processor.svg?branch=master)](https://travis-ci.org/MarvinWilliam/sub-processor) [![codecov](https://codecov.io/gh/MarvinWilliam/sub-processor/branch/master/graph/badge.svg)](https://codecov.io/gh/M

Downloads

4

Readme

sub-processor

Build Status codecov

NPM

Installation

npm install --save sub-processor

Example

// sub.js
// 建议这个包引用node_modules中的一些cpu密集型处理任务
const { Base } = require('sub-processor');
module.exports = class Sub extends Base {
  handler(arg1, arg2) {
    // do something and return with promise or return directly  
  }
};
const { Processor } = require('sub-processor');
const processor = new Processor({moduleFullPath: `fullPathToModule/sub.js`});

processor.on('error', (err) => {
  // do something
});

processor
  .exec(arg1, arg2)
  .then((result) => {
    // result of running sub.js 
  })
  .catch((err) => {
    // running errored
  })
  .then(() => processor.dispose());

Document

class Base

异步执行的包需要继承于该基类,基类提供一些基础方法

instance method

  • init():Promise<void> 如果需要在执行之前先异步初始化一些内容,覆盖该方法并返回promise, 外部调用将会等到promise执行完成之后再进行.
  • handler():Promise<*> 主方法,执行的业务逻辑放在这里,返回结果异步同步都可以.
  • dispose():Promise<void> 外部dispose时,会向子进程发送SIGINT信号,并调用该方法,如果有需要异步处理的关闭操作,覆盖该方法,并返回promise.

class Processor

  • constructor([options]) 实例方法
    • options.moduleFullPath string 执行脚本的完整路径
    • options.timeout number (default: 10 * 1000) 单次执行超时时间
    • options.forkOptions object (default: {}) child_process.fork的options

instance method

  • exec(...args):Promise<*> 异步调用包,这里传递的args将会以相同的方式传递给脚本的handler方法
  • dispose():Promise<void> 销毁当前子进程