Domain and subdomain with common code in asp net mvc and azure

Introduction

When a web using ASP.NET MVC and , it is common to have a and subdomain that share some common code. This can lead to code duplication and issues. In this article, we will explore different approaches to solve this problem and examples to illustrate each solution.

Approach 1: Shared Library

One way to solve the problem of code duplication is to create a shared library that contains the common code. This library can be referenced by both the domain and subdomain , allowing them to share the same codebase.


// SharedLibrary.csproj
namespace SharedLibrary
{
    public class CommonCode
    {
        public void DoSomething()
        {
            // Common code logic
        }
    }
}

In the domain and subdomain projects, you can reference the shared library and use its classes and methods.


// Domain.csproj
using SharedLibrary;

namespace Domain
{
    public class DomainClass
    {
        public void UseCommonCode()
        {
            CommonCode commonCode = new CommonCode();
            commonCode.DoSomething();
        }
    }
}

// Subdomain.csproj
using SharedLibrary;

namespace Subdomain
{
    public class SubdomainClass
    {
        public void UseCommonCode()
        {
            CommonCode commonCode = new CommonCode();
            commonCode.DoSomething();
        }
    }
}

This approach ensures that any changes made to the common code in the shared library will be reflected in both the domain and subdomain projects. However, it may introduce a dependency the projects, so careful versioning and strategies should be considered.

Approach 2: Code Generation

Another approach to avoid code duplication is to use code generation. This involves creating a template or script that generates the common code for both the domain and subdomain projects.

For example, you can create a template file that defines the common code and placeholders for domain-specific or subdomain-specific code. Then, using a code generation tool or script, you can generate the actual code files for each project by replacing the placeholders with the appropriate code.


// CommonCodeTemplate.cs
public class CommonCode
{
    public void DoSomething()
    {
        // Common code logic

        // [DOMAIN_SPECIFIC_CODE]
        // [SUBDOMAIN_SPECIFIC_CODE]
    }
}

Using a code generation tool or script, you can replace the placeholders with the actual code for each project.


// GeneratedDomainCode.cs
public class DomainClass
{
    public void UseCommonCode()
    {
        CommonCode commonCode = new CommonCode();
        commonCode.DoSomething();

        // Domain-specific code
    }
}

// GeneratedSubdomainCode.cs
public class SubdomainClass
{
    public void UseCommonCode()
    {
        CommonCode commonCode = new CommonCode();
        commonCode.DoSomething();

        // Subdomain-specific code
    }
}

This approach allows you to generate the common code with the necessary modifications for each project. However, it requires maintaining the code generation template and running the code generation process whenever changes are made.

Conclusion

When with a domain and subdomain that share common code in ASP.NET MVC and Azure, it is important to find a solution that avoids code duplication and ensures consistency. The two approaches discussed in this article, using a shared library and code generation, provide different ways to achieve this goal. Choose the approach that best fits your project's requirements and maintainability needs.

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