Java Microservices Architecture

A microservices-based architecture built with Java, Spring Boot, Kafka, and observability tools like Prometheus and Grafana.

Features

• Decoupled Services: Independent services with REST APIs and Kafka.
• Event-Driven Architecture: Kafka for asynchronous messaging.
• Authentication: Keycloak for OAuth2-based security.
• Monitoring: Metrics with Prometheus and Grafana; centralized logs with Loki.
• Resiliency: Fault tolerance with Circuit Breaker patterns.

Technologies

• Frameworks: Spring Boot, Spring Cloud
• Messaging: Kafka
• Database: MySQL, MongoDB
• Authentication: Keycloak
• Monitoring: Prometheus, Grafana, Loki
• Build Tool: Gradle
• Containerization: Docker

Services

1. Order Service: Handles order placement and sends events to Kafka.
2. Notification Service: Listens to Kafka and sends email notifications.
3. API Gateway: Centralized routing and authentication.