lepumin/dotnet-template-onion

Onion Architecture with .NET 5/.NET Core and CQRS/Event Sourcing following a DDD approach

dotnet-template-onion

A .NET/.NET Core template to use Onion Architecture and DDD (Domain Driven Design) with CQRS and ES with a simple example on how to use all this architecture together from the Controller until the Repository class using Domain objects and different patterns.

Documentation

You can find information about this template in:

• Main Architecture
• Hexagonal Architecture
• DDD
• CQRS AND ES
• SOLID

Prerequisites

.NET 5

Ensure you have the correct dotnet-core SDK installed for your system:

https://dotnet.microsoft.com/download/dotnet/5.0

This is just the version used by the template, if you need to use a newer or older one, you can do it manually after.

Usage

1. Clone this repository
2. To allow the api to be created you will need to install the template from nuget:

dotnet new -i {{Path_where_you_cloned_the_repository}}

• Example:

dotnet new -i C:\GitLocal\dotnet-template-onion

3. To check that the template has been installed successfully:

dotnet new -l

• There should now be a new template dotnet_template_onion

Templates                                          Short Name                 Language          Tags
----------------------------------------------------------------------------------------------------------
.NET Core 3.1 Template with CQRS, ES and DDD       dotnet_template_onion      [C#]              Web/API/Microservices

4. Create the .Net Core Solution

dotnet new dotnet_template_onion -n {{Namespace_of_your_project}} -o <outputFolder>

• This will create the folder containing a solution and project folder.

And you are ready to go, you can use Visual Studio, Visual Studio Code or any other IDE to proceed with your coding.

Structure of the template

C:.
│   .gitignore
│   Dotnet.Onion.Template.sln
│   README.md
│
├───docs
│       ARCHITECTURE.md
│       CQRS-ES.md
│       DDD.md
│       HEXAGONAL.md
│       SOLID.md
│
├───images
│       dotnet-onion-ddd-cqrs-es.jpg
│
├───src
│   ├───Dotnet.Onion.Template.API
│   │   │   .dockerignore
│   │   │   Dockerfile
│   │   │   Dotnet.Onion.Template.API.csproj
│   │   │   Program.cs
│   │   │   Startup.cs
│   │   │
│   │   ├───Bindings
│   │   ├───Config
│   │   │       appsettings-dev.json
│   │   │       appsettings-int.json
│   │   │       appsettings-prod.json
│   │   │       appsettings-stag.json
│   │   │
│   │   ├───Controllers
│   │   │       TasksController.cs
│   │   │
│   │   ├───Extensions
│   │   │   └───Middleware
│   │   │           ErrorDetails.cs
│   │   │           ExceptionMiddleware.cs
│   │   │
│   │   └───Properties
│   │           launchSettings.json
│   │
│   ├───Dotnet.Onion.Template.Application
│   │   │   Dotnet.Onion.Template.Application.csproj
│   │   │
│   │   ├───Handlers
│   │   │       TaskCommandHandler.cs
│   │   │       TaskEventHandler.cs
│   │   │
│   │   ├───Mappers
│   │   │       TaskViewModelMapper.cs
│   │   │
│   │   ├───Services
│   │   │       ITaskService.cs
│   │   │       TaskService.cs
│   │   │
│   │   └───ViewModels
│   │           TaskViewModel.cs
│   │
│   ├───Dotnet.Onion.Template.Domain
│   │   │   Dotnet.Onion.Template.Domain.csproj
│   │   │   IAggregateRoot.cs
│   │   │   IRepository.cs
│   │   │
│   │   └───Tasks
│   │       │   ITaskFactory.cs
│   │       │   ITaskRepository.cs
│   │       │   Task.cs
│   │       │
│   │       ├───Commands
│   │       │       CreateNewTaskCommand.cs
│   │       │       DeleteTaskCommand.cs
│   │       │       TaskCommand.cs
│   │       │
│   │       ├───Events
│   │       │       TaskCreatedEvent.cs
│   │       │       TaskDeletedEvent.cs
│   │       │       TaskEvent.cs
│   │       │
│   │       └───ValueObjects
│   │               Description.cs
│   │               Summary.cs
│   │               TaskId.cs
│   │
│   └───Dotnet.Onion.Template.Infrastructure
│       │   Dotnet.Onion.Template.Infrastructure.csproj
│       │
│       ├───Factories
│       │       EntityFactory.cs
│       │       TaskFactory.cs
│       │
│       └───Repositories
│               TaskRepository.cs
│
└───tests
    └───Dotnet.Onion.Template.Tests
        │   Dotnet.Onion.Template.Tests.csproj
        │
        └───UnitTests
            ├───Application
            │   └───Services
            │           TaskServiceTests.cs
            │
            └───Helpers
                    HttpContextHelper.cs
                    TaskHelper.cs
                    TaskViewModelHelper.cs