layout	pattern
title	CQRS
folder	cqrs
permalink	/patterns/cqrs/
pumlid	7SPR4a0m3030gt00pR_RH6I8QQFouFgC_TfHb6gkd5Q7FQBx363ub4rYpoMTZKuDrYXqDX37HIuuyCPfPPTDfuuHREhGqBy0NUR0GNzAMYizMtq1
categories	Architectural
tags	Java Difficulty-Intermediate

Intent

CQRS Command Query Responsibility Segregation - Separate the query side from the command side.

Applicability

Use the CQRS pattern when

• you want to scale the queries and commands independently.
• you want to use different data models for queries and commands. Useful when dealing with complex domains.
• you want to use architectures like event sourcing or task based UI.

Credits

• Greg Young - CQRS, Task Based UIs, Event Sourcing agh!
• Martin Fowler - CQRS
• Oliver Wolf - CQRS for Great Good