Microservices Architecture - Spring Boot Project

Overview

This project demonstrates a Microservices-based architecture using Spring Boot, covering:

• Multiple microservices (Accounts, Cards, Loans, Transactions, Notifications)
• Centralized Configuration Management via Config Server
• Service Discovery using Eureka Server
• API Gateway Server for routing, security, and rate limiting
• Asynchronous Communication with RabbitMQ
• Caching using Redis
• Authentication & Authorization using Keycloak (OIDC)
• Containerization with Docker

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Tech Stack

Layer	Technology
API Gateway	Spring Cloud Gateway
Config Management	Spring Cloud Config Server
Service Discovery	Eureka Server
Messaging Queue	RabbitMQ
Security	Keycloak + OAuth2 (OIDC)
Caching	Redis
Database	MySQL
Containerization	Docker + Docker Compose
API Documentation	Swagger/OpenAPI

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Microservices Overview

Microservice	Port	Description
Accounts	8080	Manages customer account details
Cards	8090	Manages customer card details
Loans	9000	Manages customer loan details
Transactions	9020	Tracks customer transactions
Notifications	9010	Sends notifications (via RabbitMQ)

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Supporting Services

Service	Port	Description
Config Server	8071	Centralized configuration
Eureka Server	8070	Service registry
Gateway Server	8072	Entry point for all requests
RabbitMQ UI	15672	RabbitMQ Management Console
Keycloak	7080	Authentication provider (OIDC)

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Running the Project

Prerequisites

• Java 17
• Maven
• Docker + Docker Compose
• MySQL (port 3307)

Start with Docker Compose

docker-compose up --build