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Architecting ASP.NET Core Applications

Architecting ASP.NET Core Applications - Third Edition

By : Carl-Hugo Marcotte
4.5 (11)
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Architecting ASP.NET Core Applications

Architecting ASP.NET Core Applications

4.5 (11)
By: Carl-Hugo Marcotte

Overview of this book

This unique ASP.NET Core book will fill in the gaps in your REST API and backend designs. Learn how to build robust, maintainable, and flexible apps using Gang of Four (GoF) design patterns and modern architectural principles. This new edition is updated for .NET 8 and focuses exclusively on the backend, with new content on REST APIs, the REPR pattern, and building modular monoliths. You’ll start by covering foundational concepts like REST, the SOLID principles, Minimal APIs, dependency injection in .NET, and other ASP.NET Core 8 mechanisms. Then, you’ll learn to develop components using design patterns, including many from the GoF. Finally, you’ll explore organizing your application code with patterns that vary from layers to feature-oriented vertical slice designs, covering CQS and a deep dive into microservices along the way. A brand-new e-commerce project at the end of the book will tie it all together. This how-to guide will teach you how to assemble your own APIs from building blocks, to suit whatever real-world requirements you may have.
Table of Contents (27 chapters)
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1
Section 1: Principles and Methodologies
6
Section 2: Designing with ASP.NET Core
13
Section 3: Component Patterns
25
Other Books You May Enjoy
26
Index

The Object Mapper pattern

What is object mapping? In a nutshell, it is the action of copying the value of an object’s properties into the properties of another object. But sometimes, properties’ names do not match; an object hierarchy may need to be flattened and transformed.

As we saw in the previous chapter, each layer can own its own model, which can be a good thing, but that comes at the price of copying objects from one layer to another. We can also share models between layers, but even then, we usually need to map one object onto another. Even if it’s just to map your models to Data Transfer Objects (DTOs), object mapping is almost inevitable.

Remember that DTOs define our API’s contract. Independent contract classes help maintain the system, making us choose when to modify them. If you skip using DTOs, each time you change your domain model, it automatically updates your endpoint’s contract, possibly breaking some clients....

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