Chapter plan
What you will complete
01Choose Layered, Hexagonal or Clean BoundariesCompare dependency direction, testing seams, ceremony, and change cost around one real use case.Keep domain policy independent of delivery and persistence detailsUse ports at boundaries with meaningful replacement or testing valueAllow simple CRUD paths to remain simple 50 min02Recognize the Patterns Behind Spring AnnotationsConnect proxies, strategies, templates, factories, and adapters to the behavior annotations activate.Know when a call crosses a proxy boundaryPrefer composition and explicit strategies in application codeDebug generated behavior from the underlying pattern 40 min03Design a Production-Grade CapstoneBring contracts, consistency, security, observability, testing, resilience, and delivery into one reviewable slice.Document decisions and rejected alternativesExercise failure and recovery pathsShip evidence that another engineer can reproduce 60 min
Module outcome
Defend an architecture through dependency direction, failure behavior, performance evidence, and evolutionary cost.
Mental model
Architecture is the set of boundaries that keeps important decisions easy to test and expensive details replaceable.
Module checkpoint
Production checkout capstone
Design, build, test, secure, observe, and ship one end-to-end checkout slice.
- Architecture decisions
- Failure-mode review
- Load and recovery evidence
Final module assessment
Ready to prove mastery?
Complete all 50 questions after finishing the module lessons and checkpoint.