CQRS by Example

Master CQRS: Build Efficient and Scalable Systems with Real-World Examples

Carlos Buenosvinos, Christian Soronellas, Keyvan Akbary

• Publisher: Packt Publishing
• Year: 2024
• eBook ISBN: 9781836646303
• Topic: Computer Science
• Subtopic: Information Technology
• Index: Computer Science

This course balances theory with practical implementation. You'll learn through real-world examples, starting with the fundamentals and moving to advanced CQRS techniques. Each concept is accompanied by hands-on exercises to solidify your understanding.Learn the CQRS pattern through hands-on examples. Understand how to design scalable systems by separating commands and queries, and implement best practices for improved performance and flexibility.

Key Features

• A comprehensive introduction to the CQRS pattern for building scalable systems
• In-depth explanation of the separation between commands and queries
• Detailed coverage of event sourcing and data consistency techniques

Book Description

This course offers an in-depth exploration of the Command Query Responsibility Segregation (CQRS) pattern, a powerful architecture design that separates read and write operations to achieve greater scalability and performance in software systems. You'll begin by understanding the core principles behind CQRS and why it is essential for handling complex, high-traffic applications. Throughout the course, we'll work through real-world examples that demonstrate how to apply CQRS to achieve a cleaner and more efficient codebase. Next, we will guide you through the practical aspects of implementing CQRS in a variety of use cases, focusing on how it enhances system maintainability and performance. You'll learn to distinguish between commands and queries effectively, and how to manage data consistency across distributed systems using techniques like event sourcing and eventual consistency. By the end of the course, you will have a comprehensive understanding of CQRS and its benefits. You'll be able to implement it in your own projects, whether you're building new applications or improving legacy systems. With a focus on scalability, maintainability, and performance, this course equips you with the skills needed to take on complex architectural challenges confidently.

What you will learn

• Understand the core principles of the CQRS pattern
• Separate read and write operations effectively in system design
• Implement event sourcing to ensure data consistency
• Manage eventual consistency in distributed systems
• Apply CQRS to real-world, scalable applications
• Integrate CQRS with other architectural patterns

Who this book is for

This course is ideal for software developers, solution architects, and technical leads who are looking to enhance their knowledge of scalable system design. It is particularly suited for professionals working on high-traffic, data-intensive applications where performance and maintainability are critical. Additionally, developers familiar with domain-driven design, microservices, or event-driven architectures will find this course highly relevant. While prior knowledge of CQRS is not required, a foundational understanding of database design and system workflows will be beneficial.

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Table of contents

• Table of Contents
• Foreword by Marco Pivetta
• Preface
• About the Authors
• CQRS and Domain-Driven Design
• A Journey Toward CQRS
• Anatomy of CQRS
• Command Side and the Write Model
• Query Side and the Read Models
• Synchronizing the Write and the Read Models
• The Full Picture
• Optimizations and Edge Cases
• CQRS and Event Sourcing
• Demo Time
• The End
• Bibliography