This project is a practical implementation of Microservices Architecture using Spring Boot and Spring Cloud.
The main goal is to build a distributed, scalable, and secure system where each service runs independently and communicates with others.
The system is divided into several independent services:
- Config server → where all configurations are centralized in one place.
- api-gateway service →The entrance to all services.
- Service registry → Where each service registered itself and able to reach other services.
- Customer Service → Manages customers.
- Order Service → Manages orders.
- Product Service → Manages products.
- Payment Service → Handles payment operations.
- Notification Service → Sends notifications and emails to customers.
✨ Each service has its own database and can run independently.
- ⚡ Spring Boot → Core framework to build each service quickly (spring web -spring Data Jpa -Lombok -Validation).
- 🔍 Spring Cloud Netflix Eureka → Service Discovery (so services can find and register with each other).
- 🚪 Spring Cloud Gateway → A single entry point to the system (API Gateway).
- 🤝 Feign Client → Simplifies inter-service communication without boilerplate RestTemplate code.
- 📡 Apache Kafka → Event-driven communication between services.
- 🗄️ PostgreSQL → Separate database for each service (Database per service).
- 🐳 Docker & Docker Compose → To containerize and run the whole system easily.
- 🔐 Keycloak → Authentication & Authorization to secure the services.
- 📧 Java Mail Sender → To send real emails from Notification Service.
- 🕵️ Zipkin + Spring Actuator → Distributed Tracing to monitor and track the journey of each request.
- 🔄 Each service can be scaled or developed independently.
- 🛡️ System resilience → if one service goes down, others remain functional.
- 🔗 Easier inter-service communication (thanks to Feign & Kafka).
- 🔐 Strong security from the start using Keycloak.
- 📩 Automatic notifications and emails to customers (e.g., after successful payment).
- 🕵️ Full observability with Zipkin to trace requests end-to-end.
- ⚙️ Flexibility to add new services or update existing ones without affecting the rest.