Event-driven Microservices, CQRS, Event Sourcing, SAGA, Transactions Management by AXON SERVER

Introduction

This is a sample project that shows how to implement a simple event-driven microservice architecture using .NET Core, CQRS, Event Sourcing, SAGA, Transactions, Sagas, CQRS and Event Sourcing.

Architecture

Project Properties

• CORE - API ->

  • General axon configuration classes
  • General shared command and event classes for all microservices

• Order Service ->

  • Management all saga orchestration
  • Management if any error occurs in the saga orchestration compensating the transaction
  • Management all command and event classes for order service

• Product Service ->

  • Management of products command and query handlers

• Customer Service ->

  • Management of customers command and query handlers

Technologies

• Java 17
• Spring Boot 2.7.5
• Spring Cloud 2021.0.3
• Axon Server 4.6.2
• Spring Cloud
• Spring Data JPA
• H2 Database
• Lombok
• Docker Compose
• Eureka Server

Project Structure

• core-api - Contains the core api of the project
• api-gateway - Contains the api gateway of the project
• registry-server - Contains the eureka server of the project
• order-service - Contains the order service of the project and management the saga orchestration
• payment-service - Contains the payment service of the project
• product-service - Contains the product service of the project
• user-service - Contains the customer service of the project

How to run

• First run axon server

cd infrastructure
docker-compose up -d

• Run the registry server

cd registry-server
mvn spring-boot:run

• Run the api gateway

cd api-gateway
mvn spring-boot:run

• Run the order service

cd order-service
mvn spring-boot:run

• Run the payment service

cd payment-service
mvn spring-boot:run

• Run the product service

cd product-service
mvn spring-boot:run

• Run the user service

cd user-service
mvn spring-boot:run