The book you are looking for, Designing Hexagonal Architecture with Java by Davi Vieira, was published by Packt Publishing
Free PDF Access: Packt often provides a DRM-free PDF version at no cost if you have already purchased a print or Kindle edition. You can claim it via the Packt Free eBook link. The book you are looking for, Designing Hexagonal
Ports and Adapters: Understand how to use interfaces (ports) and implementations (adapters) to connect your application to the outside world. Core concepts of domain‑driven design applied to hex arch
Hexagonal Architecture, first introduced by Alistair Cockburn, aims to decouple the core logic of an application from external concerns like databases, user interfaces, and third-party services. The "hexagon" represents the application's core, which communicates with the outside world through "ports" (interfaces) and "adapters" (implementations). Core Components The book you are looking for
Let’s simulate a small snippet of what the PDF likely teaches using a banking example.
pom.xml