المستودعات وخدمات المجال

في هذا الدرس

place persistence and cross-aggregate logic correctly.

الموضوعات المخطط لها

• One repository per aggregate root, with collection-like methods: findById, save.
• The repository interface lives in the domain; JPA implements it (MID-059).
• A domain service holds domain logic that fits no single aggregate, such as pricing across order and discount rules.
• Do not confuse it with an application service, which orchestrates use cases and transactions.
• No repository for inner objects like OrderLine.