Currency Exchange Microservices

🧱 Core Tech Stack

🔹 Backend & Microservices

• Java
• Spring Boot
• Spring Cloud (netflix)
• REST APIs
• Maven

🔹 Service-to-Service Communication

• Spring Cloud OpenFeign (REST calls between services)
• Spring Cloud LoadBalancer
• Ribbon (older versions, conceptually)

🔹 Configuration & Discovery

• Spring Cloud Config Server (centralized config)
• Eureka Naming Server (service discovery)
• Spring Profiles

🔹 API Gateway

• Spring Cloud Gateway
• Routing
• Filters
• Cross-cutting concerns (auth, logging)

🔹 Fault Tolerance & Resilience

• Resilience4j
• Circuit Breaker
• Retry
• Rate Limiting
• Bulkhead

🔹 Databases

• H2 (in-memory, for learning)
• JPA / Hibernate
• Sometimes MySQL concepts (depends on version)

🔹 Containerization

• Docker
• Dockerizing microservices
• Docker Compose
• later Kubernetes