Book Image

An Atypical ASP.NET Core 5 Design Patterns Guide

By : Carl-Hugo Marcotte
Book Image

An Atypical ASP.NET Core 5 Design Patterns Guide

By: Carl-Hugo Marcotte

Overview of this book

Design patterns are a set of solutions to many of the common problems occurring in software development. Knowledge of these design patterns helps developers and professionals to craft software solutions of any scale. ASP.NET Core 5 Design Patterns starts by exploring basic design patterns, architectural principles, dependency injection, and other ASP.NET Core mechanisms. You’ll explore the component scale as you discover patterns oriented toward small chunks of the software, and then move to application-scale patterns and techniques to understand higher-level patterns and how to structure the application as a whole. The book covers a range of significant GoF (Gangs of Four) design patterns such as strategy, singleton, decorator, facade, and composite. The chapters are organized based on scale and topics, allowing you to start small and build on a strong base, the same way that you would develop a program. With the help of use cases, the book will show you how to combine design patterns to display alternate usage and help you feel comfortable working with a variety of design patterns. Finally, you’ll advance to the client side to connect the dots and make ASP.NET Core a viable full-stack alternative. By the end of the book, you’ll be able to mix and match design patterns and have learned how to think about architecture and how it works.
Table of Contents (27 chapters)
1
Section 1: Principles and Methodologies
5
Section 2: Designing for ASP.NET Core
11
Section 3: Designing at Component Scale
15
Section 4: Designing at Application Scale
21
Section 5: Designing the Client Side
25
Acronyms Lexicon

Implementing the Decorator design pattern

The Decorator pattern allows us to extend objects at runtime while keeping responsibilities separated. It is a simple but powerful pattern. In this section, we'll explore how to implement this pattern in the traditional way, as well as how to leverage an open source tool named Scrutor to help us create powerful DI-ready decorators using .NET 5.

Goal

The decorator's goal is to extend an existing object, at runtime, without changing its code. Moreover, the decorated object should not be aware that it is being decorated, leaving it as a great candidate for long-lived or complex systems that need to evolve. This pattern fits systems of all sizes.

I often use this pattern to add flexibility and create adaptability to a program for next to no cost. In addition, small classes are easier to test, so the Decorator pattern adds ease of testability into the mix, making it worth mastering.

The Decorator pattern makes it easier to...