Domain-Driven Refactoring

on YouTube ↗49m

" summary

Refactors a legacy loyalty system into a real domain model by extracting a web-backed OfferValueCalculator domain service, converting a long handler into focused methods with ReSharper in Visual Studio 2022, and pushing expiration logic into the offer type while moving assignment behavior into the member aggregate. Uses Entity Framework and IHttpClient, introduces an interface for DI and test seams, tightens constructors and removes public setters; result is encapsulated domain objects and safer, testable behavior.

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" chapters (13)

1. 0:00Introduction and setup
2. 1:27What is domain-driven design
3. 3:54Refactoring literature and techniques
4. 6:02Current loyalty system model
5. 10:19Starting the refactoring process
6. 15:15Extracting methods for clarity
7. 19:09Moving behavior to domain objects
8. 27:19Encapsulating expiration logic
9. 31:30Assigning offers to members
10. 37:02Protecting domain object integrity
11. 43:06Finalizing domain object constructors
12. 45:35Benefits of domain-driven refactoring
13. 46:39Q&A and closing remarks

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