Building Microservices with Node.js

Microservices architecture can help scale applications, but requires careful planning and implementation.

Service Design

javascript

// user-service.js
const express = require('express');
const app = express();

app.get('/users/:id', async (req, res) => {
  const user = await getUserById(req.params.id);
  res.json(user);
});

app.listen(3001);

Inter-Service Communication

javascript

// Using HTTP
const axios = require('axios');
const user = await axios.get('http://user-service:3001/users/123');

// Using message queues
const amqp = require('amqplib');
const connection = await amqp.connect('amqp://localhost');

Microservices require careful consideration of communication patterns and data consistency.