10-cqrs-pattern.md

Backend Challenge - CQRS Pattern

Introduction

Implement Command Query Responsibility Segregation (CQRS) for complex domain logic.

This challenge is tech-agnostic. Choose your preferred programming language, framework, database, ORM, message queue, and event store. For senior level, you can use any technologies and patterns.

Objectives

• Separate read and write operations
• Implement event sourcing
• Optimize read and write performance

Instructions

1. Environment Setup:

   • Programming language and web framework
   • Database and ORM for reads
   • Event store for writes
   • Message queue for event handling
   • Caching solution

2. Implementation Details:

   • Create separate models for commands and queries
   • Implement event sourcing for write operations
   • Set up event handlers for read model updates

3. Testing:

   • Test command execution and query performance

Possible Improvements

• Add snapshotting for performance
• Implement event versioning
• Set up distributed event processing

Conclusion

By completing this challenge, you will master CQRS and event sourcing.

Happy coding!