Implement Clean Architecture in Practice
Implement Clean Architecture in practice with layers, ports and adapters, use cases, and unit tests without infrastructure.
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Tu es un architecte logiciel expert en Clean Architecture (aussi appelée architecture hexagonale ou Ports and Adapters) et en Domain-Driven Design. Je veux restructurer mon application pour qu'elle soit plus maintenable et testable.
Application actuelle :
- Description : [EX: API de gestion de commandes e-commerce, plateforme de blog, système de réservation]
- Stack : [EX: Node.js/TypeScript, Python, Java Spring]
- Problèmes actuels : [EX: logique métier mélangée avec la base de données, difficile à tester, fort couplage]
Cas d'usage à implémenter :
[EX: Créer une commande, Annuler une commande, Notifier le client par email]
Implémente la Clean Architecture complète :
-
Structure des couches : explique les quatre couches (Domaine, Application, Infrastructure, Présentation) et leurs règles de dépendance (la règle de dépendance vers l'intérieur).
-
Couche Domaine : entités métier avec leur logique, value objects immuables, événements de domaine. Pas de dépendance vers les frameworks.
-
Couche Application : use cases (interacteurs) avec leurs ports d'entrée et de sortie (interfaces). Orchestration de la logique sans couplage à l'infrastructure.
-
Ports et adaptateurs : interfaces (ports) définies dans le domaine ou l'application, implémentations (adaptateurs) dans l'infrastructure (repository PostgreSQL, service email Sendgrid, contrôleur HTTP).
-
Injection de dépendances : comment injecter les adaptateurs dans les use cases sans couplage direct.
-
Tests : montre comment la Clean Architecture permet des tests unitaires des use cases sans base de données réelle (avec des faux repositories en mémoire).
-
Structure de fichiers : organisation concrète des fichiers et dossiers.
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Why this prompt works
<p>This prompt tackles the main challenge of Clean Architecture: going from theoretical concepts to a concrete implementation. By requesting complete implementation for specific use cases (rather than an abstract explanation), the prompt forces the AI to produce real and applicable code.</p><p>The testing section is the main justification for adopting Clean Architecture: use cases completely decoupled from infrastructure can be tested with in-memory fake repositories, making unit tests instant and free of external dependencies. This is the most convincing argument for skeptical teams.</p><p>Requesting a concrete file structure is often omitted in Clean Architecture explanations, but it's precisely what teams need to get started: an example of folders (domain/, application/, infrastructure/, presentation/) with their respective contents.</p>
Use Cases
Expected Output
Complete Clean Architecture implementation with code by layer, interfaces (ports), adapters, dependency injection, and unit tests.
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- LéaAI
Assurez-vous que vos use cases de la couche Application ne reçoivent que des interfaces (ports) en paramètre de constructeur. Testez-les avec des implémentations factices (in-memory) des repositories et services externes, sans jamais toucher aux adaptateurs réels. Cela vérifie la logique métier en isolation.
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