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ASP .NET Core is the advanced version of ASP.NET developed by Microsoft. ASP .NET is a web-based application framework with least amount of coding. It is an open source web framework which can be run on various operating systems such as Linux, Windows, Mac, etc.
With the release of ASP .NET Core 2.0, Microsoft has the next major version of the general purpose, cross-platform and open source that was released in 2016. ASP .NET Core is an open source framework that runs on .net framework and also on ASP .NET.
ASP .NET Core has been created to have many of the APIs that are available in the recent release of .NET Framework. The initial purpose of ASP .NET Core was to provide the solutions for ASP .NET but now uses and is the basis for many other scenarios including the next generation mobile solutions.
ASP .NET Core consists of entity framework, the identity core, the Razor core and the MVC core. The ASP .NET MVC is a web-development platform which combines the features of MVC (model view controller) architecture. It is an alternative to ASP .NET web forms.
It divides web application into three layers –
- The Model (Business Layer)
- The View (Display Layer)
- The Controller (Input Control)
Today, Web APIs are more able to drives traffic to the websites and connect to the modern world very easily. The skill of designing robust Web APIs that other developers can drain is in high demand.
APIs that drive most web and mobile applications need to have the stability and reliability in serving the best performance even when the traffic is high.
The Aim of this article is to explain the Advanced Architecture of ASP .NET Core Web API. ASP .NET Core is a framework completely rewrite from scratch in order to make it open-source and cross-platform. It is a modular framework distributed as NuGet packages that allow including packages that you required in your APIs.
ASP .NET Core is created to deploy on the cloud as well as on-premises. Developers can now develop applications based on cloud and mobile back-end applications.
ASP .NET Core for Web API
ASP .NET Core is a new framework that Microsoft designed on the high level of .NET Core technology that has been around since. Web assembly that contains the entire web Forms libraries still bought into more recent ASP .NET MVC 5 solutions. ASP .NET Core provides developer much reliable performance. It is architected for cross-platform execution.
Building great APIs depends on the Architecture, there are many aspects of APIs designing and development from the built-in functionality of ASP .NET Core. These aspects are given below:
- Dependency Injection-
The reason for using Dependency Injection in APIs is that it allows the user to have the better experience decoupling the architecture layer and also allow mocking the data layer.
- Maintainability of the API-
Maintainability is the long term issue. Maintainability for any engineering process is the ease with which a product, software, applications and many other things can be maintained by finding defects, correct that defects, repairing and replacing all defective components without having to replace working parts and maximize the life of that product and etc things. This can be difficult without a well-planned and executed architecture. To check the maintainability of API, evaluate the following way: Check if your architecture allows changes that have minimum impact on other areas of our system. Have established patterns for debugging the API to make it easy and Automate testing and make it as clear as possible.
- Ports and Adapter Pattern-
It is the way to solve the problems of having business logic too tightly and other dependencies like data access or API framework. The pattern can be best look as an onion with ports on the outside of the hexagon and adapters and business logic placed near the core. The external connections would be the ports. The architecture is divided into the logical segments of API, Domain, and Data.
The Domain layer:
- It explains the entities objects that will be used throughout the application. These models will show the data layer’s Data Models.
- It explains the view models which will be used by the API layer for HTTP GET requests and POST responses as single objects.
- It explains the interfaces through which our Data Layer can equipment that data access logic.
- It Implements the supervisor that will contain techniques called from the API layer. Every function will represent an API call and will convert data from the injected Data layer.
- The domain entity object represents the database that we are using to store and retrieve data used for the API business layer.
- The view model is the extension of the entities that help to retrieve more data from the user.
The Data Layer –
This is the next layer of the API architecture. The main aim of the data layer is the implementation of each repository using the interfaces designed in the Domain layer. If you have Data layer encapsulated, all data access will allow facilitating a god testing strategy for API.
The API Layer-
This is the final layer of the ASP .NET architecture that will interact with the consumer. This layer contains the code for the Web endpoint logic including with controllers.
It will have only one response that is to handle the HTTP requests that the web server receives. This layer also returns responses for successes and failure. It involves little business logic. Routing is handled by attribute routing in Asp.net core web application development. Dependency injection is also used which is now available inbuilt in the platform.
Outlining and building up a good ASP .NET Core 2.0 Web API arrangement takes knowledge all together to have a decoupled design that will enable each layer to be testable and take after the Single Responsibility Principle.