Hexagonal Architecture , also known as the Ports and Adapters pattern, is a software design pattern that aims to create a decoupled and maintainable application by separating the core business logic from external concerns (like databases, APIs, and UIs). Structure of Hexagonal Architecture A typical Hexagonal Architecture has three main layers: 1️⃣ Core Domain (Application Logic) This contains the business rules and domain models. It is completely independent of external technologies . Example: If you’re building a banking system , this part would include logic for transactions, withdrawals, and deposits . 2️⃣ Ports (Interfaces) These are interfaces that define how the core interacts with external components. Two types of ports: Inbound Ports (driven by external inputs like APIs, UI, or events) Outbound Ports (used to interact with external services like databases, messaging systems, etc.) 3️⃣ Adapters (Implementation of Ports) These are concrete implementations of the ports, re...