Understanding CQRS and Mediator Pattern in Application Layer

TLDRThis video explores the concepts of CQRS and Mediator Pattern in the application layer. CQRS separates methods into commands and queries, while Mediator Pattern provides a central communication hub. Splitting the application layer into features or use cases allows for better scalability and maintainability. The Mediator package is used to handle commands and queries effectively.

Key insights

💡CQRS separates methods into commands and queries, enforcing clear boundaries between methods that change data and methods that only read data.

💡Mediator Pattern acts as a central communication hub, handling the execution of commands and queries in a decoupled manner.

💡Splitting the application layer into features or use cases allows for better scalability and maintainability.

💡The Mediator package helps handle commands and queries effectively, simplifying the communication between different parts of the application.

💡Using the Mediator package with the CQRS and Application Layer pattern provides a clean and organized way to structure and manage the codebase.

Q&A

What is CQRS?

CQRS (Command Query Responsibility Segregation) is a pattern that separates methods into commands and queries, maintaining clear boundaries between methods that change data and those that only read data.

What is the Mediator Pattern?

The Mediator Pattern acts as a central communication hub, facilitating the interaction between different components of an application in a decoupled manner.

Why split the application layer into features or use cases?

Splitting the application layer allows for better scalability and maintainability by organizing the codebase around specific features or use cases, making it easier to understand and manage.

How does the Mediator package simplify command and query handling?

The Mediator package provides a simple and efficient way to handle commands and queries by acting as a centralized hub for communication, eliminating the need for direct coupling between different parts of the application.

Why is the Mediator package beneficial in managing a codebase?

Using the Mediator package, along with the CQRS and Application Layer patterns, provides a clean and organized structure for managing the codebase, ensuring clear separation of concerns and maintainable code.

Timestamped Summary

00:00Introduction to CQRS and Mediator Pattern

00:24CQRS separates methods into commands and queries

01:12Mediator Pattern for decoupled communication

02:08Splitting the application layer for scalability and maintainability

03:05Using the Mediator package for command and query handling

03:58Benefits of using Mediator, CQRS, and Application Layer pattern