CQRS Projection Patterns

关于

This skill provides specialized patterns and implementation templates for building projections in event-driven systems. It focuses on CQRS (Command Query Responsibility Segregation) principles, enabling developers to transform raw event logs into query-optimized read models across various databases like PostgreSQL or Elasticsearch. These patterns facilitate real-time catch-up subscriptions, persistent checkpointing, and complex data aggregations, ensuring high-performance read-sides and eventual consistency for distributed systems.

主要功能

• Support for multiple projection types including Live, Catchup, and Persistent
• Advanced data aggregation patterns for real-time reporting and analytics
• Robust checkpoint management for resilient event processing
• Ready-to-use templates for SQL databases and Elasticsearch integration
• 3 GitHub stars
• Standardized projection architecture for event-sourced systems

使用场景

• Implementing the read-side of a CQRS-based microservice architecture
• Generating real-time business dashboards and metrics from raw event logs
• Synchronizing relational database records with search indexes for full-text search