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Embracing Rich Domain Objects: A Practical Guide
- Rich Domain Objects (RDO) advocate for encapsulating both state and behavior within domain entities, promoting a cohesive architecture.
- RDOs in Domain-Driven Design (DDD) model software entities based on data structure, domain responsibilities, and behavior.
- Benefits of RDOs include encapsulation of business logic, improved domain consistency, self-validation, and business-aligned code.
- A practical example demonstrates implementing an Athlete class using RDO principles in Java, ensuring valid and synchronized data.
- Through automatic category assignment based on age rules, the Athlete class maintains consistency and avoids invalid object states.
- Rich Domain Objects facilitate easier testing due to embedded business logic, resulting in more reliable unit tests.
- Embracing RDOs leads to more robust, behavior-oriented domain modeling, aligning systems with real-world business processes.
- By embedding business logic in domain entities, applications become more resilient and expressive, reducing bugs and enhancing testing.
- A fundamental question to consider is whether an object should only store data or also manage and validate that data for a more effective design.
- RDOs enable developers to create maintainable systems aligned with stakeholder language, offering clearer APIs and better testing.
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