This page details the hexagonal architecture (also known as Ports and Adapters) implemented in the library system's lending context. We explain how domain logic is isolated from infrastructure concerns, the key architectural components, and how they interact to support the system's business rules.

This page explains how Hexagonal Architecture (also known as Ports and Adapters pattern) is implemented in this codebase. It covers the separation between domain core, ports (interfaces), and adapters

Hexagonal Architecture is a key design pattern to use when implementing Domain Driven Design. It enables evolutionary changes, helps to keep test suites fast and reliable, and protects the system against ripple effects caused by technology issues.

This diagram shows the core structure of Hexagonal Architecture with the domain at the center, communicating with the external world (Web, CLI, DB, etc.) through Ports and Adapters.

Learn how to organize application layers using Hexagonal Architecture, DDD, and Spring.

In this article, I will overview the concept of Hexagonal Architecture (HA), the problem it addresses, its benefits, implications and some practical examples illustrated via code and diagrams.

Master hexagonal architecture in Java with practical Domain-Driven Design examples. Learn ports, adapters, application services, DTOs, and validation.

It receives commands or queries from the ports, and sends requests out through the ports to external actors, which are implemented through adapters, as illustrated in the following diagram.

DDD is easier to implement when teams use hexagonal architecture. In hexagonal architecture, the application core is the center of the application. It is decoupled from other modules through ports and adapters, and has no dependencies on other modules.

In this post, we’ll break down Hexagonal Architecture in simple terms and show how it integrates naturally with DDD using a real-world, end-to-end example implemented in C#.