🛒 E-Commerce Platform

A production-ready microservices e-commerce backend built with Java 21 and Spring Boot 3.

🏗️ Architecture

┌─────────────────────────────────────────┐
│              API Gateway                │
└──────┬──────┬──────┬──────┬────────────┘
       │      │      │      │
  User  Product Order Payment Notification
Service Service Service Service  Service

🛠️ Tech Stack

Layer	Technology
Language	Java 21
Framework	Spring Boot 3.4
Database	PostgreSQL 16
Cache	Redis 7
Messaging	Apache Kafka
Migration	Flyway
Testing	JUnit 5, Mockito, Testcontainers
Container	Docker & Docker Compose

🚀 Getting Started

Prerequisites

• Docker & Docker Compose
• Java 21
• Maven

Run Infrastructure

docker-compose up -d

Run Services

cd user-service && mvn spring-boot:run

📐 Design Patterns

• Hexagonal Architecture — Order & Payment services
• Layered Architecture — User, Product, Notification services
• Saga Pattern — Distributed transaction management via Kafka
• CQRS — (planned)

📌 Services

Service	Port	Description
api-gateway	8080	Single entry point
user-service	8081	Auth & user management
product-service	8082	Product catalog
order-service	8083	Order management
payment-service	8084	Payment processing
notification-service	8085	Email/SMS alerts