Layered Web App Package Diagram

Layered web app package diagram

A layered web application package diagram makes the responsibilities of each architectural layer easy to inspect. Routes handle delivery, application services coordinate use cases, domain classes express business concepts, and infrastructure adapters connect to external systems. Dependencies reveal whether a route reaches into data access or whether a service is doing too much. This is a useful design artifact for a small web service because it stays at the module level and can change as the architecture evolves.

種類 UMLクラス図規格 OMG UML 2.5.1 §9–§11エンジン schematex-umlclass更新日 2026/9/24

依頼内容

“Create a layered web app package diagram with routes, application services, domain logic, infrastructure adapters, and dependencies.”

次はこちらAdd an authentication package.Change EmailAdapter to QueueAdapter.

この図に含まれるもの

図の背後にある意思決定を読み解く。

01Keep routes thin

Route packages invoke application services.

02Protect domain logic

Business objects remain independent of delivery details.

03Contain adapters

Persistence and email sit in infrastructure.

04Show direction

Dependencies should point inward where possible.

Use to review module boundaries and communication paths in a web application.

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よくある質問

What is a layered package diagram?

It groups a system by architectural layer and shows how one layer depends on another.

Where do repositories belong?

They are usually infrastructure concerns, even when an interface is referenced by application or domain code.

How detailed should it be?

Show important boundaries and dependencies, not every implementation class.