CQRS Design pattern training on Saturday and Sunday | CQRS and Mediator Patterns
Design Pattern and Architecture Training Overview
The instructor announces the continuation of design pattern and architecture training on Saturday and Sunday, highlighting the coverage of various topics like object-oriented programming, solid principles, domain-driven development, and upcoming focus on CQRS (Command Query Responsibility Segregation).
Object-Oriented Programming Concepts
- Object-oriented programming concepts covered include abstraction, implementation, inheritance, polymorphism, composition, aggregation.
- Solid principles are discussed as part of the training curriculum.
- Introduction to inversion of control, dependency injection in software design.
Domain-Driven Development Principles
- Explanation of domain-driven development classes such as services, entities, values.
- Emphasis on bounded context importance in domain modeling.
- Discussion on aggregate root concept and patterns like bridge pattern and repository pattern.
Command Query Responsibility Segregation (CQRS)
- Focus for the upcoming sessions is on CQRS - Command Query Responsibility Segregation.
- Explanation of segregating insert/update/delete operations into separate classes from query operations for better code organization.
Understanding Command Query Responsibility Segregation (CQRS)
The instructor delves into the practical application of CQRS by illustrating how to separate command classes for write operations from query classes for read operations to enhance code clarity and maintainability.
Challenges with Traditional Class Design
- Developers often use the same class for both read and write operations leading to unnecessary data loading during certain operations.
- Issues arise when different properties are required for reading versus writing data in a class.
God Classes & Single Responsibility Principle Violation
- Overloading a class with functionalities leads to "God Classes" violating the single responsibility principle.
Benefits of Command Query Responsibility Segregation
- By separating command and query responsibilities into distinct classes, code complexity is reduced without compromising reusability significantly.
Implementation Guidelines
New Section
In this section, the speaker discusses the implementation of CQRS (Command Query Responsibility Segregation) in a professional and organized manner.
Implementing CQRS
- The example provided is at a basic level, with more detailed discussions on implementing CQRS professionally.
- Emphasis on discussing command handlers, queues, and related topics for a comprehensive understanding.
- Looking forward to delving deeper into CQRS during the upcoming session on Saturday and Sunday.
New Section
The speaker expresses anticipation for the upcoming session focused on CQRS and encourages active participation.
Anticipation for Session
- Excitement for discussing Command Query Responsibility Segregation (CQRS) in detail during the weekend session.
- Encouragement for active engagement and learning during the upcoming discussion.