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node-mesh

v2.0.19

Published

Master - Branch 形式 Nodejs 微服务框架

Downloads

35

Readme

Master - Branch 形式 Nodejs 微服务框架

一、用法(Usage)

Master 和 Branch 可以是不同文件的不同进程,为了方便示例,都放在同一个文件

1、 Request - Response


import { Master, Branch } from 'node-mesh';

const actions = {
    add: (a: number, b: number): number => {
        return a + b;
    }
};

const actions2 = {
    add2: (a: number, b: number): number => {
        return a + b + 1;
    }
};

const master1 = new Master<typeof actions & typeof actions2>('master1', { port: 3010 });

const branch1 = new Branch<typeof actions & typeof actions2>('branch1', { port: 3010 });

// 批量注册方法
master1.createResponder(actions2);

// 创建请求者
const masterReq = master1.createRequester();

// 批量注册方法
branch1.createResponder(actions);

// 创建请求者
const branchReq = branch1.createRequester();

// 请求
branchReq.add(11, 11).then((result) => {
    console.log('result1', result); // 22
});

// 请求
branchReq.add2(22, 22).then((result) => {
    console.log('result2', result); // 45
});

// 请求
masterReq.add(33, 33).then((result) => {
    console.log('result3', result); // 66
});

// 请求
masterReq.add2(44, 44).then((result) => {
    console.log('result4', result); // 89
});

2、Subscribe - Publish


import { Master, Branch } from 'node-mesh';

const master1 = new Master('master1', { port: 3010 });

const branch1 = new Branch('branch1', { port: 3010, master: 'master1' });

// Subscribe
master1.subscribe('sub/test', (error, content) => {
    console.log(555, content); // content === sub
});

// Publish
branch1.publish('sub/test', 'sub');

二、原理(Design)

1、客户端与服务端绑定(bind)


客户端与服务端建立 connect,客户端发出绑定通知,服务端接收绑定通知,校验返回结果,完成绑定

2、单主分支(branch)


master 启动 -》 branch 建立链接 -》 注册 action 到 master 缓存 -》 通知其他分支上线

分支请求动作 -》 检查自己有没有 action -》 检查有没有缓存 action -》 请求 action

分支下线 -》 清除 master 上的分支 action 缓存 -》 通知其他分支下线

三、错误列表(Error)

export enum CustomErrorCode {
    success = "OK", // 成功
    none = "NONE", // 未知
    requestTimeout = "REQUEST_TIMEOUT", // 请求超时
    bindError = "BIND_ERROR", // 绑定失败
    requestParamsError = "REQUEST_PARAM_ERROR", // 请求参数问题
    bindTimeout = "BIND_TIMEOUT", // 绑定超时
    actionNotExist = "ACTION_NOT_EXIST", // 动作不存在
    actionSocketNotActive = "ACTION_SOCKET_NOT_ACTIVE" // socket不在线或者不存在
}