Quiz and Question Microservices with Spring Boot

This project is a Quiz and Question Microservices application built using Spring Boot. It demonstrates the implementation of various microservices concepts including service discovery, load balancing, configuration management, and API gateway functionality.

Key Features

• Feign Client:

  • Used for communication between microservices, allowing declarative REST client behavior.

• Eureka Netflix Server:

  • A service registry for service discovery, allowing microservices to find each other and communicate dynamically.

• Eureka Netflix Client:

  • Each microservice registers itself with the Eureka server, enabling auto-discovery and load balancing.

• Load Balancer:

  • Ensures high availability and fault tolerance by distributing incoming requests evenly across multiple service instances.

• Config Server:

  • Centralized management of application configurations, simplifying updates across services.

• API Gateway (Spring Cloud Gateway):

  • Acts as the entry point for all client requests, routing them to the appropriate microservice and handling cross-cutting concerns like security, logging, and rate-limiting.

Technologies Used

• Spring Boot
• Spring Cloud Netflix Eureka (Server & Client)
• Feign Client
• Spring Cloud Config Server
• Spring Cloud Gateway
• MySQL

How It Works

This application uses a microservices architecture, where each service has a specific responsibility (e.g., handling questions, quizzes, etc.). These services are:

• Quiz Service: Manages quiz data and handles quiz-related operations.
• Question Service: Handles question-related operations for quizzes.
• Gateway Service: API Gateway that routes requests to the appropriate services and applies cross-cutting concerns.
• Eureka Server: Provides service discovery for microservices.
• Config Server: Centralized configuration management for microservices.

Flow of Requests

1. The client sends requests to the API Gateway.
2. The API Gateway routes requests to the appropriate microservice (Quiz or Question Service).
3. Both Quiz Service and Question Service communicate with each other through the Feign Client.
4. The services register themselves with the Eureka Server for service discovery.
5. Load balancing is handled by Netflix Ribbon, ensuring that requests are distributed evenly across instances of each microservice.
6. Configuration settings for services are centralized and managed through the Spring Cloud Config Server.