This CleanCodeJN package streamlines the development of web APIs in .NET applications by providing a robust
framework for CRUD operations and facilitating the implementation of complex business logic in a clean and maintainable manner.
CRUD support for WebAPIs with the power of Mediator pattern, Automapper, DataRepositories and Entity Framework
This CleanCodeJN package streamlines the development of web APIs in .NET applications by providing a robust
framework for CRUD operations and facilitating the implementation of complex business logic in a clean and maintainable manner.
Features
CRUD APIs (Minimal or Controller based) build in seconds
Uses Mediator to abstract build-in and custom complex business logic
Uses DataRepositories to abstract Entity Framework from business logic
Enforces IOSP (Integration/Operation Segregation Principle) for commands
Easy to mock and test
On latest .NET 8.0
How to use
Add RegisterRepositoriesCommandsWithAutomapper() to your Program.cs
Add app.RegisterApis() to your Program.cs or use AddControllers + MapControllers()
Start writing Apis by implementing IApi
Extend standard CRUD operations by specific Where() and Include() clauses
Use IOSP for complex business logic
Step by step explanation
Add RegisterRepositoriesCommandsWithAutomapper() to your Program.cs
Add app.RegisterApis() when using Minimal APIs to your Program.cs
app.RegisterApis();
When using Controllers add this to your Program.cs
builder.Services.AddControllers();
// After Build()
app.MapControllers();
Start writing Minimal Apis by implementing IApi
public class CustomersV1Api : IApi
{
public List<string> Tags => ["Customers V1"];
public string Route => $"api/v1/Customers";
public List<Func<WebApplication, RouteHandlerBuilder>> HttpMethods =>
[
app => app.MapGet<Customer, CustomerGetDto>(Route, Tags),
app => app.MapGetById<Customer, CustomerGetDto>(Route, Tags),
app => app.MapPut<Customer, CustomerPutDto, CustomerGetDto>(Route, Tags),
app => app.MapPost<Customer, CustomerPostDto, CustomerGetDto>(Route, Tags),
// Or use a custom Command with MapRequest
app => app.MapDeleteRequest(Route, Tags, async (int id, [FromServices] ApiBase api) =>
await api.Handle<Customer, CustomerGetDto>(new SpecificDeleteRequest { Id = id }))
];
}
Extend standard CRUD operations by specific Where() and Include() clauses
public class CustomersV1Api : IApi
{
public List<string> Tags => ["Customers V1"];
public string Route => $"api/v1/Customers";
public List<Func<WebApplication, RouteHandlerBuilder>> HttpMethods =>
[
app => app.MapGet<Customer, CustomerGetDto>(Route, Tags, where: x => x.Name.StartsWith("a")),
];
}
Or use ApiCrudControllerBase for CRUD operations in controllers
[Tags("Customers V3")]
[Route($"api/v3/[controller]")]
public class CustomersController(IMediator commandBus, IMapper mapper)
: ApiCrudControllerBase<Customer, CustomerGetDto, CustomerPostDto, CustomerPutDto>(commandBus, mapper)
{
}
You can also override your Where and Include clauses
[Tags("Customers V3")]
[Route($"api/v3/[controller]")]
public class CustomersController(IMediator commandBus, IMapper mapper)
: ApiCrudControllerBase<Customer, CustomerGetDto, CustomerPostDto, CustomerPutDto>(commandBus, mapper)
{
public override Expression<Func<Customer, bool>> GetWhere => x => x.Name.StartsWith("a");
public override List<Expression<Func<Customer, object>>> GetIncludes => [x => x.Invoices];
}
More Advanced Topics
Implement your own specific Request:
public class SpecificDeleteRequest : IRequest<BaseResponse<Customer>>
{
public required int Id { get; init; }
}
With your own specific Command using CleanCodeJN.Repository
public class SpecificDeleteCommand(IIntRepository<Customer> repository) : IRequestHandler<SpecificDeleteRequest, BaseResponse<Customer>>
{
public async Task<BaseResponse<Customer>> Handle(SpecificDeleteRequest request, CancellationToken cancellationToken)
{
var deletedCustomer = await repository.Delete(request.Id, cancellationToken);
return await BaseResponse<Customer>.Create(deletedCustomer is not null, deletedCustomer);
}
}
Use IOSP for complex business logic
Derive from BaseIntegrationCommand:
public class YourIntegrationCommand(ICommandExecutionContext executionContext)
: BaseIntegrationCommand(executionContext), IRequestHandler<YourIntegrationRequest, BaseResponse>
Write Extensions on ICommandExecutionContext with Built in Requests or with your own
public static ICommandExecutionContext CustomerGetByIdRequest(
this ICommandExecutionContext executionContext, int customerId)
=> executionContext.WithRequest(
() => new GetByIdRequest<Customer>
{
Id = customerId,
Includes = [x => x.Invoices, x => x.OtherDependentTable],
},
CommandConstants.CustomerGetById);
See the how clean your code will look like in the end
public class YourIntegrationCommand(ICommandExecutionContext executionContext)
: BaseIntegrationCommand(executionContext), IRequestHandler<YourIntegrationRequest, BaseResponse>
{
public async Task<BaseResponse> Handle(YourIntegrationRequest request, CancellationToken cancellationToken) =>
await ExecutionContext
.CandidateGetByIdRequest(request.Dto.CandidateId)
.CustomerGetByIdRequest(request.Dto.CustomerIds)
.GetOtherStuffRequest(request.Dto.XYZType)
.PostSomethingRequest(request.Dto)
.SendMailRequest()
.Execute(cancellationToken);
}