Installation

npm install topper

Create a simple TCP Microservice

• Write a simple functions to receive an TCP Payload, and a server socket context and register on a Topper Server instance.

const { Server } = require('topper');
const server = new Server('0.0.0.0', 4000);

const task = async (data, socket) => {
    console.log(`New message!`);
    await socket.write(`Message payload: ${data}`);
}

server.task(task);

Client Console

nc localhost 4000
ˆ
verything is connected, Todd...
Message payload: verything is connected, Todd...

Server console output

node app.js
New task registered on tcp://localhost:4000
New message!

Send an JSON message to your TCP Microservice

• Write a function to receive an JSON string and execute some actions with payload

const { Server } = require('topper');
const server = new Server('0.0.0.0', 4000);

const task = async (data, socket) => {
    socket.write(`hello, my name is ${data.name} and i'm ${data.age} old\n`);
}

server.task(task);

nc localhost 4000
{"name": "Matheus Fidelis", "age":22}
hello, my name is Matheus Fidelis and i'm 22 old

Create a Multi Task Microservice

Create some arrays with task definitions and register on your server

const { Server } = require('./');
const server = new Server('0.0.0.0', 4000);


const tasks = [
    {
        name: 'Ping',
        task: async (data, server) => await server.write('Pong\n')
    },
    {
        name: 'Sum',
        task: async (data, server) => {
            let sum = data.numbers.reduce((prev, curr) => prev + curr);
            await server.write(`The sum is: ${sum} \n`);
        }
    }
]

server.multiTask(tasks);

Client console

echo 'Sum {"numbers": [1, 2, 3, 4, 5]}' | nc localhost 4000

echo 'Ping' | nc localhost 4000

Output:

The sum is: 15

Pong

Create a simple client

const { Client } = require('topper');
const client = new Client();

client.addServer('0.0.0.0', 4000);

client.send('Sum', {numbers: [1,2]})
    .then(success => console.log(success.toString()));