2022 Design Patterns Learning Summary
2022-12-31
Introduction
2022 was the year I systematically studied design patterns. From first encountering the concepts to applying them in real projects, this year of learning gave me a much deeper understanding of software design.
What I Learned
1. Foundational Design Patterns
In the first half of 2022, I systematically studied a number of foundational design patterns:
- Creational patterns: Factory Method, Abstract Factory, Singleton
- Structural patterns: Facade, Decorator, Proxy
- Behavioral patterns: Strategy, Chain of Responsibility, Observer
2. Application Scenarios
Hands-on project work gave me a deep understanding of where each pattern fits:
- Using the Strategy pattern for message push notifications
- Using the Chain of Responsibility pattern for permission validation
- Using the Decorator pattern for feature enhancement
3. Combining Patterns
I also learned how to combine design patterns:
- Combining multiple design patterns in complex business scenarios
- Choosing the right pattern based on business requirements
- Avoiding over-engineering and pattern misuse
Practical Applications
Design patterns applied in real projects:
- Used the Strategy pattern in the message center project to handle different push methods
- Used the Chain of Responsibility pattern in the help center project to handle permission validation
- Used the Factory Method pattern in the lottery system to create different types of prizes
Key Takeaways
1. Sharper Design Thinking
- Learned to think about problems from an architectural perspective
- Mastered design techniques for code reuse and extensibility
- Improved code maintainability and readability
2. Better Code Quality
- Cleaner code structure
- Reduced coupling
- Improved system extensibility
Looking Ahead
My plan for going deeper in 2023:
- Learn more advanced design patterns
- Study how design patterns apply in microservice architectures
- Explore combining Domain-Driven Design (DDD) with design patterns
Design patterns are essential tools in software development. I will keep learning and practicing to continually sharpen my design skills.