Book Management System - Microservices Architecture

This project is a Book Management System built using microservices architecture. It is designed to demonstrate how individual services can communicate through a centralized API Gateway. Each microservice runs independently and handles a specific domain in the system.

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🧩 Microservices Overview

Service Name	Description	Port
Author Service	Manages authors (CRUD operations)	localhost:3001
Book Service	Manages books (CRUD operations)	localhost:3002
Category Service	Manages categories (CRUD operations)	localhost:3003
Auth Service	Handles user authentication & authorization	localhost:3004
API Gateway (bms-api-gateway)	Centralized entry point to access all services	localhost:3005

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🚀 Getting Started

Prerequisites

• Node.js (v16 or higher)
• npm / yarn
• MYSQL / PostgreSQL (based on your implementation)

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📁 Folder Structure

bms-project/ │
 ├── author-service/ # Runs on port 3001
 ├── book-service/ # Runs on port 3002
 ├── category-service/ # Runs on port 3003
 ├── auth-service/ # Runs on port 3004
 └── bms-api-gateway/ # Runs on port 3005

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⚙️ How to Run

Each service should be run independently. Open separate terminal tabs/windows for each.

1. Author Service

  cd author-service
  npm install
  npm start
  # Runs on http://localhost:3001

2. Book Service

  cd book-service
  npm install
  npm start
  # Runs on http://localhost:3002

3. Category Service

  cd category-service
  npm install
  npm start
  # Runs on http://localhost:3003

4. Auth-Service

  cd auth-service
  npm install
  npm start
  # Runs on http://localhost:3004

5. API Gateway

cd bms-api-gateway
npm install
npm start
# Runs on http://localhost:3005

🔐 Authentication & Authorization

• Auth service manages JWT-based authentication.

• API Gateway validates incoming tokens and routes requests accordingly.

• Role-based access control (RBAC) can be implemented via the auth-service.

📡 Communication Between Services

• Services communicate via HTTP through the centralized API Gateway.

• You can also implement service discovery or use a message broker (e.g., RabbitMQ, Kafka) for event-driven architecture.

✅ API Endpoints

All requests go through the API Gateway (http://localhost:3005).

Examples:

• GET /authors

• POST /books

• GET /categories

• POST /auth/login

✍️ Author

Developed by Rimanshu Singh