DotNetCoreArchitecture

This project is an example of architecture with new technologies and best practices.

The goal is to share knowledge and be used for new projects.

It is not the definitive solution for all scenarios.

⭐ Thanks for enjoying! ⭐

Code Analysis

Technologies

Practices

Clean Code
SOLID Principles
DDD (Domain-Driven Design)
Code Analysis
Inversion of Control
Unit of Work
Repository
Database Migations
Authentication
Logging
Caching

Clean Code: A Handbook of Agile Software Craftsmanship - Robert C. Martin (Uncle Bob)
Clean Architecture: A Craftsman's Guide to Software Structure and Design - Robert C. Martin (Uncle Bob)
Domain-Driven Design: Tackling Complexity in the Heart of Software - Eric Evans
Domain-Driven Design Reference: Definitions and Pattern Summaries - Eric Evans
Implementing Domain-Driven Design - Vaughn Vernon
Domain-Driven Design Distilled - Vaughn Vernon

Visual Studio Extensions

Visual Studio Code Extensions

Run

Command Line

Install latest .NET Core SDK.
Open directory source\Web\Frontend in command line and execute npm run restore.
Open directory source\Web in command line and execute dotnet run.
Open https://localhost:8090.

Visual Studio Code

Install latest .NET Core SDK.
Install C# Extension.
Open directory source\Web\Frontend in command line and execute npm run restore.
Open source directory in Visual Studio Code.
Press F5.

Visual Studio 2017

Install latest .NET Core SDK.
Open directory source\Web\Frontend in command line and execute npm run restore.
Open source\DotNetCoreArchitecture.sln in Visual Studio.
Set DotNetCoreArchitecture.Web as startup project.
Press F5.

Docker

Install and configure Docker.
Execute docker-compose up --build -d --force-recreate in root directory.
Open http://localhost:8095.

Nuget Packages

Packages were created to make this architecture clean of common features for any solution.

Source: https://github.com/rafaelfgx/DotNetCore

Published: https://www.nuget.org/profiles/rafaelfgx

Layers

Web: This layer contains the api (ASP.NET Core) and the frontend (Angular).

IoC: This layer provides inversion of control registering services.

CrossCutting: This layer provides generic features for other layers.

Application: This layer is responsible for flow control. It does not contain business rules or domain logic.

Domain: This layer contains business rules and domain logic.

Model: This layer is responsible for modeling objects such as entities, enums, models and value objects.

Database: This layer isolates and abstracts the data persistence.

Web

ASP.NET Core

Swagger

View the documentation generated by Swagger:

https://localhost:8090/swagger

Startup

The Startup class is responsible for configuring the api.

public class Startup
{
    public Startup(IHostingEnvironment environment)
    {
        Configuration = environment.Configuration();
        Environment = environment;
    }

    private IConfiguration Configuration { get; }

    private IHostingEnvironment Environment { get; }

    public void Configure(IApplicationBuilder application)
    {
        application.UseExceptionDefault(Environment);
        application.UseCorsDefault();
        application.UseHstsDefault(Environment);
        application.UseHttpsRedirection();
        application.UseAuthentication();
        application.UseResponseCompression();
        application.UseResponseCaching();
        application.UseStaticFiles();
        application.UseMvcWithDefaultRoute();
        application.UseHealthChecks("/health");
        application.UseSwaggerDefault();
        application.UseSpaStaticFiles();
        application.UseSpaAngularServer(Environment, "Frontend", "serve");
    }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddDependencyInjection(Configuration);
        services.AddFileProvider();
        services.AddCors();
        services.AddAuthenticationDefault();
        services.AddResponseCompression();
        services.AddResponseCaching();
        services.AddMvcDefault();
        services.AddHealthChecks();
        services.AddSwaggerDefault();
        services.AddSpaStaticFiles("Frontend/dist");
    }
}

Controller

The Controller class is responsible for receiving and responding requests.

[ApiController]
[RouteController]
public class UsersController : ControllerBase
{
    public UsersController(IUserService userService)
    {
        UserService = userService;
    }

    private IUserService UserService { get; }

    [HttpPost]
    public async Task<IActionResult> AddAsync(AddUserModel addUserModel)
    {
        var result = await UserService.AddAsync(addUserModel);

        return new ActionIResult(result);
    }

    [HttpDelete("{userId}")]
    public async Task<IActionResult> DeleteAsync(long userId)
    {
        var result = await UserService.DeleteAsync(userId);

        return new ActionIResult(result);
    }

    [HttpPatch("{userId}/Inactivate")]
    public async Task<IActionResult> InactivateAsync(long userId)
    {
        var result = await UserService.InactivateAsync(userId);

        return new ActionIResult(result);
    }

    [HttpGet]
    public async Task<IEnumerable<UserModel>> ListAsync()
    {
        return await UserService.ListAsync();
    }

    [HttpGet("{userId}")]
    public async Task<UserModel> SelectAsync(long userId)
    {
        return await UserService.SelectAsync(userId);
    }

    [AllowAnonymous]
    [HttpPost("SignIn")]
    public async Task<IActionResult> SignInAsync(SignInModel signInModel)
    {
        var result = await UserService.SignInJwtAsync(signInModel);

        return new ActionIResult(result);
    }

    [HttpPost("SignOut")]
    public Task SignOutAsync()
    {
        var signOutModel = new SignOutModel(User.Id());

        return UserService.SignOutAsync(signOutModel);
    }

    [HttpPut("{userId}")]
    public async Task<IActionResult> UpdateAsync(long userId, UpdateUserModel updateUserModel)
    {
        updateUserModel.UserId = userId;

        var result = await UserService.UpdateAsync(updateUserModel);

        return new ActionIResult(result);
    }
}

Angular

Component

The Component class is responsible for being a part of the application.

@Component({ selector: "app-login", templateUrl: "./login.component.html" })
export class AppLoginComponent {
    signInModel = new SignInModel();

    constructor(private readonly appAuthenticationService: AppAuthenticationService) { }

    ngSubmit() {
        this.appAuthenticationService.signIn(this.signInModel);
    }
}

Model

The Model class is responsible for containing a set of data.

export class SignInModel {
    login: string | undefined;
    password: string | undefined;
}

Service

The Service class is responsible for accessing the api or containing logic that does not belong to a component.

@Injectable({ providedIn: "root" })
export class AppUserService {
    constructor(
        private readonly http: HttpClient,
        private readonly router: Router,
        private readonly appTokenService: AppTokenService) { }

    add(addUserModel: AddUserModel) {
        return this.http.post<number>(`Users`, addUserModel);
    }

    delete(userId: number) {
        return this.http.delete(`Users/${userId}`);
    }

    list() {
        return this.http.get<UserModel[]>(`Users`);
    }

    select(userId: number) {
        return this.http.get<UserModel>(`Users/${userId}`);
    }

    signIn(signInModel: SignInModel): void {
        this.http
            .post<TokenModel>(`Users/SignIn`, signInModel)
            .subscribe((tokenModel) => {
                if (tokenModel && tokenModel.token) {
                    this.appTokenService.set(tokenModel.token);
                    this.router.navigate(["/main/home"]);
                }
            });
    }

    signOut() {
        if (this.appTokenService.any()) {
            this.http.post(`Users/SignOut`, {}).subscribe();
        }

        this.appTokenService.clear();
        this.router.navigate(["/login"]);
    }

    update(updateUserModel: UpdateUserModel) {
        return this.http.put(`Users/${updateUserModel.userId}`, updateUserModel);
    }
}

Guard

The Guard class is responsible for route security.

@Injectable()
export class AppGuard implements CanActivate {
    constructor(
        private readonly router: Router,
        private readonly appTokenService: AppTokenService) { }

    canActivate() {
        if (this.appTokenService.any()) { return true; }
        this.router.navigate(["/login"]);
        return false;
    }
}

Error Handler

The ErrorHandler class is responsible for centralizing the management of all errors and exceptions.

@Injectable()
export class AppErrorHandler implements ErrorHandler {
    constructor(private readonly injector: Injector) { }

    handleError(error: any) {
        if (error instanceof HttpErrorResponse) {
            switch (error.status) {
                case 401: {
                    const router = this.injector.get<Router>(Router);
                    router.navigate(["/login"]);
                    return;
                }
                case 422: {
                    const appModalService = this.injector.get<AppModalService>(AppModalService);
                    appModalService.alert(error.error);
                    return;
                }
            }
        }

        console.error(error);
    }
}

HTTP Interceptor

The HttpInterceptor class is responsible for intercepting request and response to perform some logic, such as adding JWT to header for every request.

@Injectable()
export class AppHttpInterceptor implements HttpInterceptor {
    constructor(private readonly appTokenService: AppTokenService) { }

    intercept(request: HttpRequest<any>, next: HttpHandler) {
        request = request.clone({
            setHeaders: { Authorization: `Bearer ${this.appTokenService.get()}` }
        });

        return next.handle(request);
    }
}

IoC

ServiceCollectionExtensions

The ServiceCollectionExtensions class is responsible for registering and configuring services for dependency injection.

public static class ServiceCollectionExtensions
{
    public static void AddDependencyInjection(this IServiceCollection services, IConfiguration configuration)
    {
        services.AddLogger(configuration);
        services.AddHash();
        services.AddJsonWebToken(Guid.NewGuid().ToString(), TimeSpan.FromHours(12));

        services.AddDbContextMigrate<DatabaseContext>(options => options
            .UseSqlServer(configuration.GetConnectionString(nameof(DatabaseContext)), sql => sql.EnableRetryOnFailure())
            .ConfigureWarnings(warnings => warnings.Throw(RelationalEventId.QueryClientEvaluationWarning))
        );

        services.AddMatchingInterfaceOrSelf
        (
            typeof(IUserService).Assembly,
            typeof(IUserDomainService).Assembly,
            typeof(IDatabaseUnitOfWork).Assembly
        );
    }
}

Application

Service

The Service class is responsible for flow control. It uses validator, factory, domain, repository and unit of work, but it does not contain business rules or domain logic.

public sealed class UserService : BaseService, IUserService
{
    public UserService
    (
        IDatabaseUnitOfWork databaseUnitOfWork,
        IUserDomainService userDomainService,
        IUserLogService userLogService,
        IUserRepository userRepository
    )
    {
        DatabaseUnitOfWork = databaseUnitOfWork;
        UserDomainService = userDomainService;
        UserLogService = userLogService;
        UserRepository = userRepository;
    }

    private IDatabaseUnitOfWork DatabaseUnitOfWork { get; }

    private IUserDomainService UserDomainService { get; }

    private IUserLogService UserLogService { get; }

    private IUserRepository UserRepository { get; }

    public async Task<IDataResult<long>> AddAsync(AddUserModel addUserModel)
    {
        var validation = new AddUserModelValidator().Valid(addUserModel);

        if (!validation.Success)
        {
            return ErrorDataResult<long>(validation.Message);
        }

        UserDomainService.GenerateHash(addUserModel.SignIn);

        var userDomain = UserDomainFactory.Create(addUserModel);

        userDomain.Add();

        var userEntity = UserEntityFactory.Create(userDomain);

        await UserRepository.AddAsync(userEntity);

        await DatabaseUnitOfWork.SaveChangesAsync();

        return SuccessDataResult(userEntity.UserId);
    }

    public async Task<IResult> DeleteAsync(long userId)
    {
        await UserRepository.DeleteAsync(userId);

        await DatabaseUnitOfWork.SaveChangesAsync();

        return SuccessResult();
    }

    public async Task<IResult> InactivateAsync(long userId)
    {
        var userDomain = UserDomainFactory.Create(userId);

        userDomain.Inactivate();

        await UserRepository.UpdateStatusAsync(userDomain.UserId, userDomain.Status);

        await DatabaseUnitOfWork.SaveChangesAsync();

        return SuccessResult();
    }

    public async Task<PagedList<UserModel>> ListAsync(PagedListParameters parameters)
    {
        return await UserRepository.ListAsync<UserModel>(parameters);
    }

    public async Task<IEnumerable<UserModel>> ListAsync()
    {
        return await UserRepository.ListAsync<UserModel>();
    }

    public async Task<UserModel> SelectAsync(long userId)
    {
        return await UserRepository.SelectAsync<UserModel>(userId);
    }

    public async Task<IDataResult<SignedInModel>> SignInAsync(SignInModel signInModel)
    {
        var validation = new SignInModelValidator().Valid(signInModel);

        if (!validation.Success)
        {
            return ErrorDataResult<SignedInModel>(validation.Message);
        }

        UserDomainService.GenerateHash(signInModel);

        var signedInModel = await UserRepository.SignInAsync(signInModel);

        validation = new SignedInModelValidator().Valid(signedInModel);

        if (!validation.Success)
        {
            return ErrorDataResult<SignedInModel>(validation.Message);
        }

        await AddUserLogAsync(signedInModel.UserId, LogType.SignIn).ConfigureAwait(false);

        return SuccessDataResult(signedInModel);
    }

    public async Task<IDataResult<TokenModel>> SignInJwtAsync(SignInModel signInModel)
    {
        var result = await SignInAsync(signInModel).ConfigureAwait(false);

        if (!result.Success)
        {
            return ErrorDataResult<TokenModel>(result.Message);
        }

        var token = UserDomainService.GenerateToken(result.Data);

        var tokenModel = new TokenModel(token);

        return SuccessDataResult(tokenModel);
    }

    public async Task SignOutAsync(SignOutModel signOutModel)
    {
        await AddUserLogAsync(signOutModel.UserId, LogType.SignOut).ConfigureAwait(false);
    }

    public async Task<IResult> UpdateAsync(UpdateUserModel updateUserModel)
    {
        var validation = new UpdateUserModelValidator().Valid(updateUserModel);

        if (!validation.Success)
        {
            return ErrorResult(validation.Message);
        }

        var userEntity = await UserRepository.SelectAsync(updateUserModel.UserId);

        var userDomain = UserDomainFactory.Create(userEntity);

        userDomain.Update(updateUserModel);

        userEntity = UserEntityFactory.Create(userDomain);

        await UserRepository.UpdateAsync(userEntity, userEntity.UserId);

        await DatabaseUnitOfWork.SaveChangesAsync();

        return SuccessResult();
    }

    private async Task AddUserLogAsync(long userId, LogType logType)
    {
        var userLogModel = new UserLogModel(userId, logType);

        await UserLogService.AddAsync(userLogModel);
    }
}

Domain

The Domain class is responsible for business rules and domain logic.

public class UserDomain
{
    protected internal UserDomain(long userId)
    {
        UserId = userId;
    }

    protected internal UserDomain(SignInValueObject signIn)
    {
        SignIn = signIn;
    }

    protected internal UserDomain
    (
        long userId,
        Roles roles
    )
    {
        UserId = userId;
        Roles = roles;
    }

    protected internal UserDomain
    (
        long userId,
        FullNameValueObject fullName,
        string email,
        Roles roles
    )
    {
        UserId = userId;
        FullName = fullName;
        Email = email;
        Roles = roles;
    }

    protected internal UserDomain
    (
        long userId,
        FullNameValueObject fullName,
        string email,
        SignInValueObject signIn,
        Roles roles
    )
    {
        UserId = userId;
        FullName = fullName;
        Email = email;
        SignIn = signIn;
        Roles = roles;
    }

    public long UserId { get; private set; }

    public FullNameValueObject FullName { get; private set; }

    public string Email { get; private set; }

    public SignInValueObject SignIn { get; private set; }

    public Roles Roles { get; private set; }

    public Status Status { get; private set; }

    public void Add()
    {
        UserId = 0;
        Roles = Roles.User;
        Status = Status.Active;
    }

    public void Inactivate()
    {
        Status = Status.Inactive;
    }

    public void Update(UpdateUserModel updateUserModel)
    {
        FullName = new FullNameValueObject(updateUserModel.Name, updateUserModel.Surname);
        Email = updateUserModel.Email;
    }
}

Domain Factory

The DomainFactory class is responsible for creating a domain object.

public static class UserDomainFactory
{
    public static UserDomain Create(long userId)
    {
        return new UserDomain(userId);
    }

    public static UserDomain Create(SignInModel signInModel)
    {
        return new UserDomain
        (
            new SignInValueObject
            (
                signInModel.Login,
                signInModel.Password
            )
        );
    }

    public static UserDomain Create(SignedInModel signedInModel)
    {
        return new UserDomain
        (
            signedInModel.UserId,
            signedInModel.Roles
        );
    }

    public static UserDomain Create(AddUserModel addUserModel)
    {
        return new UserDomain
        (
            addUserModel.UserId,
            new FullNameValueObject(addUserModel.Name, addUserModel.Surname),
            addUserModel.Email,
            new SignInValueObject(addUserModel.SignIn.Login, addUserModel.SignIn.Password),
            addUserModel.Roles
        );
    }

    public static UserDomain Create(UpdateUserModel updateUserModel)
    {
        return new UserDomain
        (
            updateUserModel.UserId,
            new FullNameValueObject(updateUserModel.Name, updateUserModel.Surname),
            updateUserModel.Email,
            updateUserModel.Roles
        );
    }

    public static UserDomain Create(UserEntity userEntity)
    {
        return new UserDomain
        (
            userEntity.UserId,
            new FullNameValueObject(userEntity.Name, userEntity.Surname),
            userEntity.Email,
            new SignInValueObject(userEntity.Login, userEntity.Password),
            userEntity.Roles
        );
    }
}

Entity Factory

The EntityFactory class is responsible for creating an entity object.

public static class UserEntityFactory
{
    public static UserEntity Create(UserDomain userDomain)
    {
        return new UserEntity
        (
            userDomain.UserId,
            userDomain.FullName.Name,
            userDomain.FullName.Surname,
            userDomain.Email,
            userDomain.SignIn.Login,
            userDomain.SignIn.Password,
            userDomain.Roles,
            userDomain.Status
        );
    }
}

Domain Service

The DomainService class is responsible for encapsulating domain logic that does not fit within the domain object.

public class UserDomainService : IUserDomainService
{
    public UserDomainService
    (
        IHash hash,
        IJsonWebToken jsonWebToken
    )
    {
        Hash = hash;
        JsonWebToken = jsonWebToken;
    }

    private IHash Hash { get; }

    private IJsonWebToken JsonWebToken { get; }

    public void GenerateHash(SignInModel signInModel)
    {
        signInModel.Password = Hash.Create(signInModel.Password);
    }

    public string GenerateToken(SignedInModel signedInModel)
    {
        var claims = new List<Claim>();
        claims.AddSub(signedInModel.UserId.ToString());
        claims.AddRoles(signedInModel.Roles.ToString().Split(", "));

        return JsonWebToken.Encode(claims);
    }
}

Model

Entity

The Entity class is responsible for containing properties of an object with identity.

public class UserEntity
{
    public UserEntity
    (
        long userId,
        string name,
        string surname,
        string email,
        string login,
        string password,
        Roles roles,
        Status status
    )
    {
        UserId = userId;
        Name = name;
        Surname = surname;
        Email = email;
        Login = login;
        Password = password;
        Roles = roles;
        Status = status;
    }

    public UserEntity() { }

    public long UserId { get; set; }

    public string Name { get; set; }

    public string Surname { get; set; }

    public string Email { get; set; }

    public string Login { get; set; }

    public string Password { get; set; }

    public Roles Roles { get; set; }

    public Status Status { get; set; }

    public virtual ICollection<UserLogEntity> UsersLogs { get; set; }
}

Model

The Model class is responsible for containing a set of data.

public class SignedInModel
{
    public long UserId { get; set; }

    public Roles Roles { get; set; }
}

Model Validator

The ModelValidator class is responsible for validating a model with defined rules.

public sealed class SignedInModelValidator : Validator<SignedInModel>
{
    public SignedInModelValidator()
    {
        RuleFor(x => x).NotNull();
        RuleFor(x => x.UserId).NotNull().NotEmpty().GreaterThan(0);
        RuleFor(x => x.Roles).NotNull().NotEmpty().NotEqual(Roles.None);
    }
}

Value Object

The ValueObject class is responsible for being immutable and having no identity.

public sealed class SignInValueObject
{
    public SignInValueObject(string login, string password)
    {
        Login = login;
        Password = password;
    }

    public string Login { get; }

    public string Password { get; }
}

Database

Context

The Context class is responsible for configuring and mapping the database.

public sealed class DatabaseContext : DbContext
{
    public DatabaseContext(DbContextOptions options) : base(options) { }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfigurationsFromAssembly();
        modelBuilder.Seed();
    }
}

Context Factory

The ContextFactory class is responsible for generating migrations.

public sealed class DatabaseContextFactory : IDesignTimeDbContextFactory<DatabaseContext>
{
    public DatabaseContext CreateDbContext(string[] args)
    {
        const string connectionString = "Server=(localdb)\\MSSQLLocalDB;Database=Database;Integrated Security=true;Connection Timeout=5;";

        var builder = new DbContextOptionsBuilder<DatabaseContext>();

        builder.UseSqlServer(connectionString, options => options.MigrationsAssembly(typeof(DatabaseContextFactory).Assembly.GetName().Name));

        return new DatabaseContext(builder.Options);
    }
}

Context Seed

The ContextSeed class is responsible for seeding initial data.

public static class DatabaseContextSeed
{
    public static void Seed(this ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<UserEntity>().HasData(new UserEntity
        {
            UserId = 1,
            Name = "Administrator",
            Surname = "Administrator",
            Email = "administrator@administrator.com",
            Login = "admin",
            Roles = Roles.User | Roles.Admin,
            Status = Status.Active
        });
    }
}

Unit of Work

The UnitOfWork class is responsible for managing transactions.

public sealed class DatabaseUnitOfWork : IDatabaseUnitOfWork
{
    public DatabaseUnitOfWork(DatabaseContext context)
    {
        Context = context;
    }

    private DatabaseContext Context { get; }

    public int SaveChanges()
    {
        return Context.SaveChanges();
    }

    public Task<int> SaveChangesAsync()
    {
        return Context.SaveChangesAsync();
    }
}

Entity Configuration

The EntityConfiguration class is responsible for configuring and mapping an entity to a table.

public sealed class UserEntityConfiguration : IEntityTypeConfiguration<UserEntity>
{
    public void Configure(EntityTypeBuilder<UserEntity> builder)
    {
        builder.ToTable("Users", "User");

        builder.HasKey(x => x.UserId);

        builder.HasIndex(x => x.Email).IsUnique();
        builder.HasIndex(x => x.Login).IsUnique();

        builder.Property(x => x.UserId).IsRequired().ValueGeneratedOnAdd();
        builder.Property(x => x.Name).IsRequired().HasMaxLength(100);
        builder.Property(x => x.Surname).IsRequired().HasMaxLength(200);
        builder.Property(x => x.Email).IsRequired().HasMaxLength(300);
        builder.Property(x => x.Login).IsRequired().HasMaxLength(100);
        builder.Property(x => x.Password).IsRequired().HasMaxLength(500);
        builder.Property(x => x.Roles).IsRequired();
        builder.Property(x => x.Status).IsRequired();

        builder.HasMany(x => x.UsersLogs).WithOne(x => x.User).HasForeignKey(x => x.UserId);
    }
}

Repository

The Repository class is responsible for abstracting and isolating the data persistence.

public sealed class UserRepository : EntityFrameworkCoreRelationalRepository<UserEntity>, IUserRepository
{
    public UserRepository(DatabaseContext context) : base(context) { }

    public Task<SignedInModel> SignInAsync(SignInModel signInModel)
    {
        return SingleOrDefaultAsync<SignedInModel>
        (
            userEntity => userEntity.Login.Equals(signInModel.Login)
            && userEntity.Password.Equals(signInModel.Password)
            && userEntity.Status == Status.Active
        );
    }

    public async Task UpdateStatusAsync(long userId, Status status)
    {
        var userEntity = Select(userId);
        userEntity.Status = status;
        await UpdateAsync(userEntity, userEntity.UserId);
    }
}

Name		Name	Last commit message	Last commit date
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source		source
.dockerignore		.dockerignore
.editorconfig		.editorconfig
.gitattributes		.gitattributes
.gitignore		.gitignore
docker-compose.yml		docker-compose.yml
dockerfile		dockerfile
license.md		license.md
postman.json		postman.json
readme.md		readme.md

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DotNetCoreArchitecture

Code Analysis

Technologies

Practices

Recommended

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Layers

Web

ASP.NET Core

Swagger

Startup

Controller

Angular

Component

Model

Service

Guard

Error Handler

HTTP Interceptor

IoC

ServiceCollectionExtensions

Application

Service

Domain

Domain

Domain Factory

Entity Factory

Domain Service

Model

Entity

Model

Model Validator

Value Object

Database

Context

Context Factory

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