Spring CQRS and Event Sourcing Microservice Example

This project is a microservice example using Event Sourcing and CQRS architecture with Java Spring.

Tools and Technologies Used

• Spring - Java Spring
• Spring Data JPA - data access layer
• Spring Data MongoDB - Spring Data MongoDB
• Mongo Express - Web-based MongoDB admin interface
• Kafka - Spring for Apache Kafka
• Kafdrop - Kafka Web UI
• PostgreSQL - PostgreSQL database
• Docker - Docker
• Liquibase - Database migrations
• Swagger OpenAPI 3 - java library helps to automate the generation of API documentation

UI Interfaces

• Swagger UI: http://localhost:8006/swagger-ui/index.html
• Kafdrop: http://localhost:9000/topic/bank-account-event-store
• Mongo Express: http://localhost:8081/db/microservices/bankAccounts

Local Run

docker-compose up
./mvnw spring-boot:run

Troubleshooting

If you encounter a Liquibase error, try running CREATE EXTENSION IF NOT EXISTS "uuid-ossp"; manually.

Thank you for using this microservice example!