🚀 Distributed Microservices System

A robust microservices-based system built with Node.js, Prisma, and MongoDB, featuring authentication and post management services. This system demonstrates modern microservices architecture with inter-service communication.

✨ Features

• 🔐 Authentication Service

  • User registration and login
  • JWT-based authentication
  • Password encryption with bcrypt
  • User profile management

• 📝 Post Service

  • Create and retrieve posts
  • User association with posts
  • Inter-service communication
  • Efficient data fetching strategies

• 🛠️ Technical Features

  • MongoDB with Prisma ORM
  • Microservices Architecture
  • JWT Authentication
  • RESTful APIs
  • Service Discovery
  • Cross-service Data Aggregation

🚀 Getting Started

Prerequisites

• Node.js (v14 or higher)
• MongoDB
• npm or yarn
• Postman (for testing APIs)

Installation

1. Clone the repository:

git clone https://github.com/mohd-afnan-shahab/Distributed-Microservices-System.git
cd Distributed-Microservices-System

2. Install dependencies for both services:

# Auth Service
cd auth_micro
npm install

# Post Service
cd ../post_micro
npm install

3. Set up environment variables:

# For auth_micro/.env
DATABASE_URL="your_mongodb_url"
JWT_SECRET="your_jwt_secret"
PORT=3000

# For post_micro/.env
DATABASE_URL="your_mongodb_url"
JWT_SECRET="your_jwt_secret"
PORT=3001
AUTH_MICRO_URL="http://localhost:3000"

4. Run Prisma migrations:

# In each service directory
npx prisma generate
npx prisma db push

5. Start the services:

# Run each in separate terminals
npm run dev

🔧 API Endpoints

Auth Service

POST /api/register - Register new user
POST /api/login - User login
GET /api/user - Get current user
GET /api/getUser/:id - Get user by ID
POST /api/getUsers - Get multiple users

Post Service

GET /api/posts - Get all posts with user details
POST /api/posts - Create new post

🏗️ Architecture

graph LR
    Client --> AuthService
    Client --> PostService
    PostService --> AuthService
    AuthService --> MongoDB[(MongoDB)]
    PostService --> MongoDB[(MongoDB)]

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💡 Implementation Details

Authentication Flow

1. User registers/logs in through Auth Service
2. JWT token is generated and returned
3. Token is used for subsequent requests

Post Creation Flow

1. Authenticated request to Post Service
2. Post created with user association
3. User details fetched from Auth Service

Data Aggregation Strategies

The project implements three methods for data aggregation:

1. Individual user fetching
2. Batch user fetching
3. Optimized lookup with caching

🛠️ Built With

• Node.js - Runtime environment
• Express - Web
• Prisma - ORM
• MongoDB - Database
• JWT - Authentication
• bcrypt - Password hashing
• Axios - HTTP client

📈 Performance Optimizations

• Batch processing for user data
• Efficient data caching
• Optimized database queries
• Connection pooling

Built with ❤️ by Mohd Afnan Shahab