: The innermost layer containing core business rules through entities and value objects. It remains completely technology-agnostic and has no dependencies on other layers. Application Hexagon
In the ever-evolving landscape of enterprise Java development, few architectural patterns have gained as much traction over the last decade as . Also known as Ports and Adapters , this pattern solves a critical problem: the tight coupling between business logic and external concerns like databases, web frameworks, or message queues. : The innermost layer containing core business rules
@Component public class ProductJpaAdapter implements ProductRepositoryPort private final ProductSpringJpaRepository jpaRepository; Also known as Ports and Adapters , this
@PostMapping("/accounts/id/withdraw") public void handle(@PathVariable Long id, @RequestBody MoneyDto dto) withdrawUseCase.withdraw(id, dto.toMoney()); Core Components package com
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
package com.mybank.application.ports;