Online Shop Microservices Ecosystem

A modern, event-driven microservices demonstration built with Spring Boot 3.5.5, RabbitMQ, and a Polyglot Persistence strategy (PostgreSQL + MongoDB).

System Overview

This project showcases a scalable microservices architecture leveraging Domain-Driven Design (DDD) and asynchronous event-driven communication.

Architecture Highlights

• Framework: Spring Boot 3.5.5
• Infrastructure: Spring Cloud Gateway (API Gateway) & Netflix Eureka (Service Discovery)
• Messaging: RabbitMQ for asynchronous order processing and real-time notifications.
• Persistence:
  • PostgreSQL: Transactional data (Users, Orders, Inventory).
  • MongoDB: Flexible document data (Products, Reviews, Analytics).
• Frontend: Next.js 15, Shadcn UI, and Tailwind CSS.

Getting Started

Prerequisites

• Docker & Docker Compose
• Java 17+
• Node.js 18+

Setup Instructions

1. Infrastructure:

   docker compose up -d

2. Backend Services: Run each service using ./gradlew bootRun (starting with discovery-service and api-gateway).

3. Frontend:

   cd frontend/app
   npm install
   npm run dev

Service Mapping

Service	Port	Persistence	Key Role
API Gateway	8080	N/A	Unified entry point
Discovery Service	8761	N/A	Eureka Service Registry
User Service	8081	PostgreSQL	User & Profile Management
Order Service	8082	PostgreSQL	Event Producer: Order Lifecycle
Inventory Service	8083	PostgreSQL	Event Consumer: Stock Updates
Product Service	8084	MongoDB	Product Catalog
Notification Service	8085	N/A	Event Consumer: Real-time Alerts
Analytics Service	8086	MongoDB	Event Consumer: Data Aggregation
Review Service	8087	MongoDB	Customer Feedback

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