catalog-service: This services provides REST API for managing catalog of products(books).
TechStack: Spring Boot, Spring Data JPA, PostgreSQL
order-service: This service provides the REST API for managing orders and publishes order events to the message broker.
TechStack: Spring Boot, Spring Security OAuth2, Keycloak, Spring Data JPA, PostgreSQL, RabbitMQ
notification-service: This service listens to the order events and sends notifications to the users.
TechStack: Spring Boot, RabbitMQ
api-gateway: This service is an API Gateway to the internal backend services (catalog-service, order-service).
TechStack: Spring Boot, Spring Cloud Gateway