Designing Web Adapters in Hexagonal Architecture

In modern software development, mixing your web framework with core business logic leads to rigid, untestable codebases. Hexagonal architecture solves this by separating concerns, placing the web layer outside the application core. This written course guides you through the exact responsibilities of a web adapter, showing you how to keep your domain logic clean and independent. You will start by mastering foundational architectural concepts, exploring why we separate ports from adapters, and defining clear boundaries. You will learn how to handle incoming HTTP requests, manage validation, map data transfer objects, and return clean responses without leaking infrastructure details into your core domain. What you'll learn: - Understand the core principles of hexagonal architecture and the role of incoming adapters - Map incoming HTTP requests to application use cases using clean input ports - Implement validation and authentication boundaries at the adapter level - Design robust data transfer objects (DTOs) that shield your domain model from web-specific details - Structure unit and integration tests specifically for web adapters to ensure reliability This course begins with key architectural terminology and theoretical foundations before moving into practical code examples and design patterns. It is designed for software developers and architects who understand basic programming concepts and web protocols and want to transition to clean architecture practices. No prior experience with hexagonal architecture is required. Start reading today to build flexible, future-proof applications.