System Flow Parameter Configuration
Define your system flow mechanics to run the structural analysis matrix.
Recommended Architecture Pattern
Synchronous API / Read Model
Direct request-response model is chosen because the system demands an immediate answer to a present-state inquiry.
Pattern Reference
Key concepts, reliability patterns, and common anti-patterns for event-driven systems.
Events, Commands, and Queries
Events (Fact)
A historical description of a state change that has fully completed within a domain ecosystem. Events are immutable data realities.
Commands (Intent)
An explicit invocation requesting a mutation of system state. Commands point forward in time and can be rejected by the validation context.
Queries (Knowledge)
An immediate request for the current runtime projection of truth. Queries do not alter data structures and demand fast execution speeds.
Essential Architecture Practices
Transactional Outbox Pattern
Protects atomicity by writing state mutations and corresponding event payloads into a unified database transaction block, preventing data-message divergence.
Consumer Idempotency Guard
Each consumer tracks which events it has already processed, so duplicate deliveries don't cause unintended side-effects.
Anti-Pattern: Distributed Monolith
Happens when you use async messaging but services still depend on each other's execution order, payload shape, or timing — effectively a monolith in disguise.
Anti-Pattern: Hidden Commands
Calling something an event (like OrderCreated) while actually expecting a specific downstream service to react in a fixed sequence. The coupling is hidden, not removed.
Example Scenarios
Select a scenario to load a typical set of parameters into the Flow Analyzer.