Alibaba Cloud Developer

Apr 28, 2021 · Backend Development

How to Refactor Monolithic Checkout Code into Clean DDD Modules

This article explains how to identify and refactor typical “流水账” (spaghetti) code in a checkout API by applying Domain‑Driven Design layers—splitting responsibilities into Interface, Application, and Domain layers, using CQE objects, DTO assemblers, and anti‑corruption facades to achieve clear, maintainable modules.