This document provides an overview of the microservices system consisting of six services developed using Spring Boot 3.2.5 and Java 17. The system includes a Config Server, Service Registry, API Gateway, Student Service, Fee Collection Service, and Receipt Service.

Config Server: Manages all microservices configurations.

Service Registry: Registers all microservices for service discovery.

API Gateway: Routes requests to respective microservices.

Student Service: Registers and manages student data.

Fee Collection Service: Collects fees from students.

Receipt Service: Generates and stores receipts for fee transactions.

Follow these steps to test the microservices:

Start the Config Server.

Start the Service Registry.

Start the API Gateway service.

Start the Student Service, Fee Collection Service, and Receipt Service.

Access Swagger UI for each service:

Student Service: http://localhost:9001/swagger-ui/index.html

Receipt Service: http://localhost:9002/swagger-ui/index.html

Fee Collection Service: http://localhost:9000/swagger-ui/index.html

You can interact with each service using Swagger UI and refer to the respective microservice README files for more details.

spring-cloud-starter-netflix-eureka-server: Service registry for microservices.

spring-cloud-starter-netflix-eureka-client: Eureka client for service registration.

spring-cloud-starter-config: Configuration management for microservices.

spring-boot-starter-webflux: WebFlux support for reactive web development.

spring-retry: Retry support for handling service unavailability.

spring-boot-starter-data-jpa: JPA support for database operations.

h2 database: In-memory database for development.

mapstruct: Mapping library for DTO to entity mapping.

spring-boot-starter-actuator: Provides production-ready features.

HTTPExchange: Communicating with other microservices.

Junit test cases have been written for each microservice to ensure proper functionality and exception handling. Error messages are appropriately displayed in case of service unavailability.