cqrs-knowledge
CQRS Knowledge Base
Quick reference for CQRS architecture patterns and PHP implementation guidelines.
Core Principles
Separation of Concerns
┌─────────────────────────────────────────────────────────────┐
│ APPLICATION │
├─────────────────────────────────────────────────────────────┤
│ WRITE SIDE (Commands) │ READ SIDE (Queries) │
├─────────────────────────────┼───────────────────────────────┤
│ Command → Handler → Domain │ Query → Handler → ReadModel │
│ Changes state │ Returns data, no side effects│
│ Uses Domain Model │ Can bypass Domain Model │
│ Single aggregate per cmd │ Can join multiple sources │
└─────────────────────────────┴───────────────────────────────┘
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