🚀 Microservice E-Commerce Application

📌 Overview

A Spring Boot Microservices-based E-Commerce Application demonstrating modern backend architecture using scalable, resilient, and event-driven design principles.

This project showcases how multiple services interact using both:

• 🔗 Synchronous communication (REST)
• ⚡ Asynchronous communication (Kafka / RabbitMQ)

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🧩 Architecture Diagram

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🏗️ System Architecture

• API Gateway → Entry point for all requests
• Auth Server → Handles authentication (JWT/OAuth2)
• Product Service → Manages product catalog (MongoDB)
• Order Service → Handles order processing (MySQL)
• Inventory Service → Manages stock (MySQL)
• Notification Service → Sends async notifications

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⚙️ Tech Stack

🧠 Backend

• Java 8+
• Spring Boot
• Spring Cloud

🔗 Communication

• REST APIs (Sync)
• Kafka / RabbitMQ (Async)

🗄️ Databases

• MongoDB
• MySQL

🔐 Security

• JWT / OAuth2

⚡ Resilience

• Resilience4J

📦 DevOps

• Docker
• GitHub

📊 Monitoring

• Zipkin
• ELK Stack (Elasticsearch, Logstash, Kibana)

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🔄 Workflow (Order Flow)

1. User → API Gateway
2. Gateway → Order Service
3. Order Service:
   • Calls Inventory Service (Sync)
   • Publishes Event (Async)
4. Notification Service consumes event
5. User receives confirmation

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🛡️ Features

• ✅ Microservices Architecture
• ✅ Event-driven system
• ✅ Circuit Breaker (Resilience4J)
• ✅ Centralized Logging & Tracing
• ✅ Secure Authentication
• ✅ Independent Service Scaling

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🧭 Service Discovery & Config

• Eureka Server → Service registry
• Config Server → Centralized configs
• Vault → Secret management

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🐳 Run Locally

🔧 Prerequisites

• Java 8+
• Maven
• Docker

▶️ Steps

# Clone repo
git clone https://github.com/kumarcodes/microservice-ecom-application.git

# Navigate
cd microservice-ecom-application

# Build project
mvn clean install

# Run services
docker-compose up