Auth Microservice ☄️

The Microservice architecture: Is an architectural style that structures an application as a collection of services that are:

• Highly maintainable and testable
• Loosely coupled
• Independently deployable
• Organized around business capabilities

Microservices approach is all about handling a complex system, but in order to do so, the approach introduces its own set of complexities and implementation challenges. which we will learn in the next part of this series!

🗺 Roadmap

Resources	Description
🧶 Framework	New using Nest? Here's everything you need to know!
🧅 Clean Architecture	Minimize the human resources required to build and maintain the required system.
🎉 Functional Guide	Build production ML pipelines with simple functions.

Nest as Backend Framework 🐱

¿Why Nest?

Nest natively supports the microservice architectural style of development. In Nest, a microservice is fundamentally an application that uses a different transport layer than HTTP. But this does not only stay here Nest supports several built-in transport layer implementations, called transporters, which are responsible for transmitting messages between different microservice instances.

Configuration ⚡️

1-Package Installation

npm i --save @nestjs/microservices

2-Instantiate a Microservice

import { NestFactory } from '@nestjs/core';
import { Transport, MicroserviceOptions } from '@nestjs/microservices';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.createMicroservice<MicroserviceOptions>(
    AppModule,
    {
      transport: Transport.TCP,
    },
  );
  app.listen();
}
bootstrap();

Clean Architecture 🧼

This diagram is taken from the official article by Robert C. Martin.

Each circle represents different areas of the software. The outermost layer is the lowest level of the software and as we move in deeper, the level will be higher. In general, as we move in deeper, the layer is less prone to change.

Folder Structure

ttt-auth-microservice
  |- node_modules
  |- src
     |- application
        |- config
            |- environment.ts
        |- app.ts
     |- domain
        |- models
        |- use-cases
           |- impl
     |- infrastructure
        |- driven-adapters
           |- adapters
           |- providers
        |- entry-points
           |- api
     |- index.ts
  |- tests
     |- domain
     |- infrastructure
  .env
  package.json
  READMED.md