Explore drive-driven development

Explain the goals of Domain-Driven Design in managing software complexity

Describe the layers of a Clean/Hexagonal Architecture (Domain, Application, Infrastructure)

Define a Bounded Context as a primary architectural boundary for a software model

Explain the concept of a Ubiquitous Language and its role in bridging communication between technical and domain experts

Distinguish between Entities (which have a unique identity) and Value Objects (defined by their attributes)

Implement immutable Value Objects in Python using features like `dataclasses(frozen=True)`

Implement Entities in Python, ensuring they have a stable identity throughout their lifecycle

Define an Aggregate as a consistency boundary for a group of related objects

Designate an Aggregate Root to act as the single entry point for modifications within an aggregate

Encapsulate business rules and invariants within an Aggregate Root's methods

Explain the role of the Repository pattern in abstracting persistence logic from the domain model

Define a repository interface in the domain layer, focused on aggregate-level operations (e.g., add, get)

Implement an in-memory repository in the infrastructure layer for unit testing purposes

Set up a basic SQLAlchemy model to map an Aggregate Root to a database schema

Implement a SQLAlchemy-based repository that uses a Session to persist and retrieve aggregates

Distinguish between Domain Services (for domain logic spanning multiple aggregates) and Application Services (for orchestrating use cases)

Implement a stateless Domain Service for complex business rules that do not naturally fit within an entity or value object

Implement an Application Service to handle a specific user-facing use case by coordinating domain objects and repositories

Use the Unit of Work pattern within an Application Service to ensure atomic operations across one or more repositories

Define Domain Events to capture significant occurrences in the domain

Implement immutable Domain Event objects in Python

Raise domain events from within an Aggregate Root following a state change

Implement event handlers (subscribers) that react to domain events, enabling loose coupling between different parts of the domain