Clean Architecture Lecture Notes

Introduction

• Clean architecture is a domain-centric architectural pattern.
• Focuses on the domain with well-defined interactions between various logical components.

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Example Application: Reminder App

• API features for creating, deleting, and fetching reminders.
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Domain-Centric Architectural Pattern

• 3-Tier Architecture vs. Clean Architecture:
  • 3-Tier Architecture:
    • Client/user interacts with the presentation layer.
    • Business logic depends on the data access layer.
    • Possible convolution of business and data access logic.
  • Clean Architecture:
    • Business logic split into application and domain layers.
    • Application layer handles use cases (e.g., set reminder, dismiss reminder).
    • Domain layer defines domain objects (e.g., reminder, user).
    • Infrastructure layer handles data access concerns.
    • Dependencies point towards the domain, making it domain-centric.

Handling Dependencies

• Inner layers define interfaces; outer layers provide implementations.
• Allows flexibility in changing technologies or frameworks in outer layers without affecting inner layers.

Solution Structure

• Presentation Layer:
  • Manages interactions with the external world (controllers, APIs).
• Application Layer:
  • Contains use cases and defines interfaces for interaction.
• Domain Layer:
  • Holds domain objects and business rules.
• Infrastructure Layer:
  • Implements data access and infrastructure concerns (e.g., file system, system clock).

Conclusion

• Many nuances in clean architecture not covered in the short video.
• Encouraged to explore more through the course.
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