YiSu Grain

Jul 22, 2026 · Fundamentals

Why a Monolithic Order API Fails – Master Four‑Layer Architecture, MVC & Sinkhole Anti‑Pattern

An order interface that mixes parameter validation, discount calculation, stock checks, and raw SQL may work initially, but without separating presentation, business logic, data access, and data storage into distinct layers—while controlling dependencies, avoiding the sinkhole anti‑pattern, and understanding MVC—the code quickly becomes unmaintainable and hard to scale.