The Holographic Tower as the Bounded Context
Imagine a single, self-contained holographic tower, like the O-Series (Operations) Tower. This entire tower represents a single BOUNDED CONTEXT. It's a miniature, complete system. The layered architecture defines its internal physics.
Infrastructure Layer: The Structural Core
Your interpretation is perfect. This is the central structural and utility core of the building. It contains the elevators, the main power conduits, the data risers, and the HVAC systems. It is the essential, shared foundation that enables every floor to function, but it is not specific to any of them.
Domain Layer: The Leased Office Space
This is the heart of the analogy. This is the custom-designed interior of a floor, where the real value of the business resides. It contains:
- The People & Teams: The
ENTITIESandAGGREGATES. - The Secret Blueprints & Processes: The deep business rules and logic—the
DEEP MODEL. - The Custom Machinery & Equipment: The specialized tools and workflows.
This layer is the entire reason the floor exists. It is the protected, high-value "inside" where the work gets done.
Application Layer: The Floor Slab & The Floor Manager
Your insight to make the FLOOR the application layer is brilliant. The floor slab is the physical boundary that coordinates all the activity within that level. It provides the space and connections for the domain layer to operate. The "Floor Manager" (the application logic) works at this level, receiving requests and directing the specialists and equipment in the office space (the Domain Layer). It is a thin, coordinating boundary.
User Interface Layer: The Intelligent Facade
This is the most elegant part of your model. The UI isn't just a lobby; it's the intelligent glass facade of the entire tower.
- Presentation: The facade is transparent, allowing you to see the state of the domain layer inside (e.g., lights are on, people are working). It presents information.
- Interaction: The facade is also the interface. A user can "touch" a specific glass panel on a specific floor to send a request (a "command") to that floor's manager (the Application Layer).
This model perfectly illustrates the core principle: the UI is a skin that covers the entire application, providing a window into the state of the domain and a surface for interacting with the application's capabilities, all without compromising the integrity of the protected core inside.