Design Patterns

Four of the five steps in every unary RPC handler are wire plumbing. Pin the service function signature and they fit in one generic adapter per transport.

Decoupling business logic from storage in Go, adding transaction support without leaking SQL details, and coordinating atomic writes across multiple repositories using a unit of work.

Separate business logic from external service calls using the Gateway pattern. Apply dependency inversion and interface segregation in Go.

Build a production-ready circuit breaker in Go from scratch with closed, open, and half-open states to prevent cascading failures.

Deep dive into event-driven architecture patterns. Learn publish-subscribe, CQRS, outbox pattern, eventual consistency, and handling microservice coupling.

Replace inheritance with the Strategy pattern in Go using interfaces. Achieve composable, testable code without class hierarchies.

Compare three Go option patterns: exposed structs, option constructors, and functional options. Learn when to use each for clean APIs.

Replace inheritance-based template pattern with composition and Protocol types to create cleaner, testable Python code without namespace pollution.

Learn efficient patterns for caching database connection objects in Python without import-time side effects or lru_cache complexity.

Learn the proxy design pattern in Python to add access control, caching, and validation layers without modifying core functionality.