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Moleculer.js Microservices

This project demonstrates a microservices architecture using Moleculer.js, a fast and powerful microservices framework for Node.js. It showcases how to create and connect multiple services, implement API gateways, and interact with a SQLite database.

Project Structure

The project consists of two main microservices:

  1. Auth Service
  2. User Service

Both services are independent and communicate through the Moleculer broker.

Services

1. Auth Service

Port: 3001 Base URL: http://localhost:3001/api/auth

Endpoints:

  1. Login

    • Method: POST
    • Path: /login
    • Action: auth.login

  2. Verify Token

    • Method: POST
    • Path: /verify
    • Action: auth.verify

2. User Service

Port: 3000 Base URL: http://localhost:3000/api

Endpoints:

  1. Register User

    • Method: POST
    • Path: /user
    • Action: user.registerUser

  2. Get All Users

    • Method: GET
    • Path: /user
    • Action: user.getAllUsers

  3. Get User by ID

    • Method: GET
    • Path: /user/:id
    • Action: user.getUser

  4. Remove User

    • Method: DELETE
    • Path: /user/:id
    • Action: user.removeUser

Moleculer.js Features Demonstrated

  1. Service Creation: Each service is created using broker.createService().
  2. Action Definition: Actions are defined within each service, representing the service's capabilities.
  3. API Gateway: Moleculer-web is used to create API gateways for each service.
  4. Inter-service Communication: The Auth service calls the User service to validate credentials.
  5. Param Validation: Action parameters are validated using Moleculer's built-in validator.

Database Integration

  • SQLite3 is used as the database.
  • Database operations are performed within service actions.
  • SQL queries are separated into a queries.js file for better organization.

Starting the Application

The application is started from index.js, which initializes the Moleculer broker and starts all services.