Spring Boot Kotlin Domain Driven Design Example

Just an example project where ddd is implemented with some other great patterns and architecture from eShopOnContainers

The use case its just a simple web api who saves notes in a db and send some emails when they are created.

Architecture

• Spring Boot 2.5.1
• Kotlin
• Domain driven design
• Mediator Pattern
• CQRS Pattern (Commands and Queries)
• Swagger API documentation
• Flyway Migrations
• Multiple Database Vendors (specifically sql server and postgres)
• Domain Events
• Hibernate Validation
• Keycloak JWT User Roles for Web API Validation
• Pipeline Registration
• Dockerfile to create Docker Images
• Swagger Implicit Authentication with Keycloak

Usage

Basically you need to create a database(sql server or postgres), keycloak, elasticsearch , kibana if you want data visualization and of course run the project or create and run a docker image.

You can use the Vagrantfile if you use Vagrant in your machine, its nice and easy to use for demo projects, the vm will need at least 3-4GB RAM if you intend to use kibana and elasticsearch.

DISCLAIMER!

Its just a demo project , not intended to use in production or following the best architecture, remember theres no silver bullet.