Library_Management_System

Library Management System (Go + Echo + MySQL + Redis + RabbitMQ)

A production-ready Library Management System API, built with modern backend technologies:

• Golang + Echo Framework
• MySQL (GORM ORM)
• Redis (Caching + Token Bucket Rate Limiting)
• RabbitMQ (Event-Driven Reservation Queue)
• Docker & Docker Compose
• Viper for configuration management

This project follows a clean, modular structure suitable for scalable production systems and professional backend development.

Overview

The Library Management System provides backend functionality for:

• User registration & authentication
• Managing books (CRUD, search, favorites)
• Loan operations (reserve, borrow, return, cancel)
• Real-time & async workflows (RabbitMQ)
• Redis caching and login rate limiting
• Clean architecture for maintainability

Key Features

• ✔ JWT-based authentication
• ✔ Clean Architecture (Handlers → Services → Repositories)
• ✔ MySQL migrations included
• ✔ Redis caching for book performance
• ✔ Redis-backed Token Bucket rate limiting
• ✔ RabbitMQ asynchronous reservation queue
• ✔ Dockerized deployment
• ✔ Configurable environment using Viper

Modules

Users Module

Handles:

• User signup
• Login
• Password hashing (bcrypt)
• Email uniqueness
• Role management (member, student)
• JWT generation

Repository:

• Create()
• FindByEmail()

Service:

• Signup()
• Login()

Handler:

• /users/signup
• /users/login

Books Module

Features:

• CRUD for books
• Search (title/author)
• Favorite system
• Redis caching:
  • Cache for single book: book:<id>
  • Cache for full list: books:all

Cache invalidation:

• On create/update/delete

Service:

• CreateBook()
• ListBooks()
• GetBookByID()
• SearchBooks()
• AddToFavorites()

Loans Module

Implements the complete loan lifecycle:

• Reserve book (async)
• Confirm borrow
• Return book
• Cancel reservation

All operations:

• Are transactional (GORM transactions)
• Update book stock
• Update reservation status
• Track timestamps (reserved_at, borrowed_at, due_date, etc.)

API summary

Users

POST /users/signup POST /users/login

Books

POST /books GET /books GET /books/:id PUT /books/:id DELETE /books/:id GET /books/search POST /books/:id/favorite/:user_id GET /books/favorites/:user_id

Loans (JWT Required)

POST /api/loans/reserve POST /api/loans/:id/confirm POST /api/loans/:id/return POST /api/loans/:id/cancel GET /api/loans/user/:userID