Search

Lessons (8)

• CQRS & Event Sourcing

  … you can use CQRS without event sourcing (very common), and event sourcing almost always needs CQRS for queries …

• Event-Driven Architecture

  … notification, event-carried state transfer, event sourcing, or CQRS. - Design events as versioned public contracts with IDs and …

• Vertical Slice Architecture & the Modular Monolith

  … update price"] direction TB c1[endpoint] -- c2[handler] -- c3[(db)] end This fits naturally with CQRS : queries read …

• Data in Microservices: Sagas & the Outbox Pattern

  … API composition, replicated data, or CQRS read models.

• Which Pattern Do I Need?

  … sidecar Adapter Anti-corruption layer Command Message queues, CQRS commands Mediator Saga orchestrator Chain of Responsibility Middleware pipelines …

• Behavioral Patterns I: Observer, Strategy, Command, State

  … TODO" } is a command object), job queues (BullMQ), CQRS commands. --- 4. State 🚦 Analogy: A traffic light behaves differently …

• Choosing an Architecture

  … by feature, top to bottom Feature-heavy apps, CQRS, fast iteration Duplication without a shared domain System shape …

• Clean Architecture in Depth

  … layers Slow development Keep simple reads simple (see CQRS and vertical slices) When to use it ✅ Rich business …