m09-domain

To identify domain entities and value objects, you map domain concepts using Domain-Driven Design techniques that distinguish items by their identity and invariants. Entities possess unique identity, while value objects are defined purely by their attributes and can be replaced without reference.

Defining aggregate boundaries in Domain-Driven Design requires grouping related entities and value objects under a single root entity to ensure consistency. You structure these boundaries by evaluating ownership, transactional invariants, and the scope of data changes.

You map domain concepts to repositories by creating data access interfaces around aggregate roots, ensuring persistence details remain isolated. Domain events capture state changes within these aggregates to trigger downstream workflows asynchronously.

Yes, you can apply domain modeling to typical business scenarios like an order system by identifying core entities, value objects, and aggregates. This approach provides structured guidance for maintaining invariants and handling ownership across the ordering process.

You should avoid Domain-Driven Design when software complexity is low, as the overhead of identifying aggregates and invariants provides little benefit. It is best suited for complex business domains where managing rules and boundaries is critical.