Architecture

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

The goal is to share knowledge and use it as reference for new projects.

Thanks for enjoying!

Build

Code Analysis

Technologies

Practices

Clean Code
SOLID Principles
DDD (Domain-Driven Design)
Code Analysis
Separation of Concerns
Unit of Work Pattern
Repository Pattern
Database Migrations
Authentication
Authorization
Performance
Logging
DevOps

Run

Command Line

Prerequisites

Steps

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

Prerequisites

Steps

Open directory source\Web\Frontend in command line and execute npm run restore.
Open source directory in Visual Studio Code.
Press F5.

Visual Studio

Prerequisites

Steps

Open directory source\Web\Frontend in command line and execute npm run restore.
Open source\Architecture.sln in Visual Studio.
Set Architecture.Web as startup project.
Press F5.

Docker

Prerequisites

Docker

Steps

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

Utils

Books

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)
Implementing Domain-Driven Design - Vaughn Vernon
Domain-Driven Design Distilled - Vaughn Vernon
Domain-Driven Design: Tackling Complexity in the Heart of Software - Eric Evans
Domain-Driven Design Reference: Definitions and Pattern Summaries - Eric Evans

Tools

Visual Studio Extensions

Visual Studio Code Extensions

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: API (ASP.NET Core) and Frontend (Angular).

Application: Application flow control.

Domain: Business rules and domain logic.

Model: Classes that carries data.

CrossCutting: Resources used by other layers.

Database: Persistence of data in the database.

Web

Angular

Component

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

It must be as simple and small as possible.

@Component({ selector: "app-signin", templateUrl: "./signin.component.html" })
export class AppSignInComponent {
    form = this.formBuilder.group({
        login: ["", Validators.required],
        password: ["", Validators.required]
    });

    constructor(
        private readonly formBuilder: FormBuilder,
        private readonly appAuthService: AppAuthService) {
    }

    signIn() {
        this.appAuthService.signIn(this.form.value);
    }
}

<form [formGroup]="form">
    <fieldset>
        <div>
            <app-label for="login" text="Login"></app-label>
            <app-input-text formControlName="login" text="Login" [autofocus]="true"></app-input-text>
        </div>
        <div>
            <app-label for="password" text="Password"></app-label>
            <app-input-password formControlName="password" text="Password"></app-input-password>
        </div>
        <div>
            <app-button text="Sign in" [disabled]="form.invalid" (click)="signIn()"></app-button>
        </div>
    </fieldset>
</form>

Model

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

export class SignInModel {
    login!: string;
    password!: string;
}

Service

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

@Injectable({ providedIn: "root" })
export class AppUserService {
    constructor(private readonly http: HttpClient) { }

    add(model: UserModel) {
        return this.http.post<number>("Users", model);
    }

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

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

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

    update(model: UserModel) {
        return this.http.put(`Users/${model.id}`, model);
    }
}

Guard

The Guard class is responsible for route security.

@Injectable({ providedIn: "root" })
export class AppRouteGuard 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({ providedIn: "root" })
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.

This interceptor adds JWT to header for every request.

@Injectable({ providedIn: "root" })
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);
    }
}

Routes

The Routes constant is responsible for registering all lazy load routes.

export const routes: Routes = [
    {
        path: "",
        component: AppParentComponent,
        children: [
            { path: "view1", loadChildren: () => import("./view1.module").then((module) => module.AppView1Module) },
            { path: "view2", loadChildren: () => import("./view2.module").then((module) => module.AppView2Module) }
        ]
    }
];

ASP.NET Core

Postman

Import "postman.json" file into Postman.

Startup

The Startup class is responsible for configuring the API.

public class Startup
{
    public void Configure(IApplicationBuilder application)
    {
        application.UseException();
        application.UseCorsAllowAny();
        application.UseHttps();
        application.UseRouting();
        application.UseStaticFiles();
        application.UseResponseCompression();
        application.UseResponseCaching();
        application.UseAuthentication();
        application.UseAuthorization();
        application.UseEndpoints();
        application.UseSpa();
    }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddCors();
        services.AddSecurity();
        services.AddResponseCompression();
        services.AddResponseCaching();
        services.AddControllersDefault();
        services.AddSpa();
        services.AddContext();
        services.AddServices();
    }
}

Extensions

The Extensions class is responsible for adding and configuring services for dependency injection.

public static class Extensions
{
    public static void AddContext(this IServiceCollection services)
    {
        var connectionString = services.GetConnectionString(nameof(Context));
        services.AddContextMigrate<Context>(options => options.UseSqlServer(connectionString));
    }

    public static void AddSecurity(this IServiceCollection services)
    {
        services.AddHash(10000, 128);
        services.AddJsonWebToken(Guid.NewGuid().ToString(), TimeSpan.FromHours(12));
        services.AddAuthenticationJwtBearer();
    }

    public static void AddServices(this IServiceCollection services)
    {
        services.AddFileExtensionContentTypeProvider();
        services.AddClassesInterfaces(typeof(IUserService).Assembly);
        services.AddClassesInterfaces(typeof(IUnitOfWork).Assembly);
    }

    public static void AddSpa(this IServiceCollection services)
    {
        services.AddSpaStaticFiles("Frontend/dist");
    }

    public static void UseSpa(this IApplicationBuilder application)
    {
        application.UseSpaAngularServer("Frontend", "development");
    }
}

Controller

The Controller class is responsible for receiving, processing, and responding requests.

It must be as simple and small as possible, without any rule or logic.

[ApiController]
[Route("Users")]
public class UserController : ControllerBase
{
    private readonly IUserService _userService;

    public UserController(IUserService userService)
    {
        _userService = userService;
    }

    [HttpPost]
    public Task<IActionResult> AddAsync(UserModel model)
    {
        return _userService.AddAsync(model).ResultAsync();
    }

    [HttpDelete("{id}")]
    public Task<IActionResult> DeleteAsync(long id)
    {
        return _userService.DeleteAsync(id).ResultAsync();
    }

    [HttpGet("{id}")]
    public Task<IActionResult> GetAsync(long id)
    {
        return _userService.GetAsync(id).ResultAsync();
    }

    [HttpPatch("{id}/Inactivate")]
    public Task InactivateAsync(long id)
    {
        return _userService.InactivateAsync(id);
    }

    [HttpGet("List")]
    public Task<IActionResult> ListAsync([FromQuery]PagedListParameters parameters)
    {
        return _userService.ListAsync(parameters).ResultAsync();
    }

    [HttpGet]
    public Task<IActionResult> ListAsync()
    {
        return _userService.ListAsync().ResultAsync();
    }

    [HttpPut("{id}")]
    public Task<IActionResult> UpdateAsync(UserModel model)
    {
        return _userService.UpdateAsync(model).ResultAsync();
    }
}

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 : IUserService
{
    private readonly IAuthService _authService;
    private readonly IUnitOfWork _unitOfWork;
    private readonly IUserRepository _userRepository;

    public UserService
    (
        IAuthService authService,
        IUnitOfWork unitOfWork,
        IUserRepository userRepository
    )
    {
        _authService = authService;
        _unitOfWork = unitOfWork;
        _userRepository = userRepository;
    }

    public async Task<IResult<long>> AddAsync(UserModel model)
    {
        var validation = await new AddUserModelValidator().ValidateAsync(model);

        if (validation.Failed)
        {
            return Result<long>.Fail(validation.Message);
        }

        var authResult = await _authService.AddAsync(model.Auth);

        if (authResult.Failed)
        {
            return Result<long>.Fail(authResult.Message);
        }

        var user = UserFactory.Create(model, authResult.Data);

        await _userRepository.AddAsync(user);

        await _unitOfWork.SaveChangesAsync();

        return Result<long>.Success(user.Id);
    }

    public async Task<IResult> DeleteAsync(long id)
    {
        var authId = await _userRepository.GetAuthIdByUserIdAsync(id);

        await _userRepository.DeleteAsync(id);

        await _authService.DeleteAsync(authId);

        await _unitOfWork.SaveChangesAsync();

        return Result.Success();
    }

    public Task<UserModel> GetAsync(long id)
    {
        return _userRepository.GetByIdAsync(id);
    }

    public async Task InactivateAsync(long id)
    {
        var user = new User(id);

        user.Inactivate();

        await _userRepository.UpdateStatusAsync(user);

        await _unitOfWork.SaveChangesAsync();
    }

    public Task<PagedList<UserModel>> ListAsync(PagedListParameters parameters)
    {
        return _userRepository.Queryable.Select(UserExpression.Model).ListAsync(parameters);
    }

    public async Task<IEnumerable<UserModel>> ListAsync()
    {
        return await _userRepository.Queryable.Select(UserExpression.Model).ToListAsync();
    }

    public async Task<IResult> UpdateAsync(UserModel model)
    {
        var validation = await new UpdateUserModelValidator().ValidateAsync(model);

        if (validation.Failed)
        {
            return Result.Fail(validation.Message);
        }

        var user = await _userRepository.GetAsync(model.Id);

        if (user == default)
        {
            return Result.Success();
        }

        user.ChangeFullName(model.Name, model.Surname);

        user.ChangeEmail(model.Email);

        await _userRepository.UpdateAsync(user.Id, user);

        await _unitOfWork.SaveChangesAsync();

        return Result.Success();
    }
}

Factory

The Factory class is responsible for creating a object.

public static class UserFactory
{
    public static User Create(UserModel model, Auth auth)
    {
        return new User
        (
            new FullName(model.Name, model.Surname),
            new Email(model.Email),
            auth
        );
    }
}

Domain

Entity

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

It must have an identity.

Property values must be assigned in the constructor and only be changed by methods.

public class User : Entity<long>
{
    public User
    (
        FullName fullName,
        Email email,
        Auth auth
    )
    {
        FullName = fullName;
        Email = email;
        Auth = auth;
        Activate();
    }

    public User(long id) : base(id) { }

    public FullName FullName { get; private set; }

    public Email Email { get; private set; }

    public Status Status { get; private set; }

    public Auth Auth { get; private set; }

    public void Activate()
    {
        Status = Status.Active;
    }

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

    public void ChangeFullName(string name, string surname)
    {
        FullName = new FullName(name, surname);
    }

    public void ChangeEmail(string email)
    {
        Email = new Email(email);
    }
}

Value Object

The ValueObject class is responsible for grouping data that adds value to domain or an entity.

It must have no identity.

Property values must be assigned in the constructor.

public sealed class Email : ValueObject
{
    public Email(string address)
    {
        Address = address;
    }

    public string Address { get; }

    protected override IEnumerable<object> GetEquals()
    {
        yield return Address;
    }
}

Model

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

public class SignInModel
{
    public string Login { get; set; }

    public string Password { get; set; }
}

Model Validator

The ModelValidator class is responsible for validating the model with defined rules and messages.

public sealed class SignInModelValidator : Validator<SignInModel>
{
    public SignInModelValidator()
    {
        RuleFor(x => x.Login).NotEmpty();
        RuleFor(x => x.Password).NotEmpty();
    }
}

CrossCutting

Enum

The Enum is responsible for being a set of named integer constants.

public enum Status
{
    None = 0,
    Active = 1,
    Inactive = 2
}

Database

Context

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

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

    protected override void OnModelCreating(ModelBuilder builder)
    {
        builder.AddConfigurationsFromAssembly();
        builder.Seed();
    }
}

Context Factory

The ContextFactory class is responsible for generating Entity Framework Core Migrations.

public sealed class ContextFactory : IDesignTimeDbContextFactory<Context>
{
    public Context CreateDbContext(string[] args)
    {
        var builder = new DbContextOptionsBuilder<Context>();

        builder.UseSqlServer("Server=(localdb)\\MSSQLLocalDB;Database=Database;");

        return new Context(builder.Options);
    }
}

Context Seed

The ContextSeed class is responsible for seeding initial data.

public static class ContextSeed
{
    public static void Seed(this ModelBuilder builder)
    {
        builder.SeedUsers();
    }

    private static void SeedUsers(this ModelBuilder builder)
    {
        builder.Entity<User>(user =>
        {
            user.HasData(new
            {
                Id = 1L,
                Status = Status.Active,
                AuthId = 1L
            });

            user.OwnsOne(owned => owned.FullName).HasData(new
            {
                UserId = 1L,
                Name = "Administrator",
                Surname = "Administrator"
            });

            user.OwnsOne(owned => owned.Email).HasData(new
            {
                UserId = 1L,
                Value = "administrator@administrator.com"
            });
        });
    }
}

Unit of Work

The UnitOfWork class is responsible for managing database transactions.

public sealed class UnitOfWork : IUnitOfWork
{
    private readonly Context _context;

    public UnitOfWork(Context context)
    {
        _context = context;
    }

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

Configuration

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

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

        builder.HasKey(user => user.Id);

        builder.Property(user => user.Id).ValueGeneratedOnAdd().IsRequired();
        builder.Property(user => user.Status).IsRequired();

        builder.OwnsOne(user => user.FullName, ownedBuilder =>
        {
            ownedBuilder.Property(fullName => fullName.Name).HasColumnName(nameof(FullName.Name)).HasMaxLength(100).IsRequired();
            ownedBuilder.Property(fullName => fullName.Surname).HasColumnName(nameof(FullName.Surname)).HasMaxLength(200).IsRequired();
        });

        builder.OwnsOne(user => user.Email, ownedBuilder =>
        {
            ownedBuilder.Property(email => email.Value).HasColumnName(nameof(User.Email)).HasMaxLength(300).IsRequired();
            ownedBuilder.HasIndex(email => email.Value).IsUnique();
        });

        builder.HasOne(user => user.Auth);
    }
}

Repository

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

public sealed class UserRepository : Repository<User>, IUserRepository
{
    public UserRepository(Context context) : base(context) { }

    public Task<long> GetAuthIdByUserIdAsync(long id)
    {
        return Queryable.Where(UserExpression.Id(id)).Select(UserExpression.AuthId).SingleOrDefaultAsync();
    }

    public Task<UserModel> GetByIdAsync(long id)
    {
        return Queryable.Where(UserExpression.Id(id)).Select(UserExpression.Model).SingleOrDefaultAsync();
    }

    public Task UpdateStatusAsync(User user)
    {
        return UpdatePartialAsync(user.Id, new { user.Status });
    }
}

mridulsri/Architecture

Architecture

Build

Code Analysis

Technologies

Practices

Run

Prerequisites

Steps

Prerequisites

Steps

Prerequisites

Steps

Prerequisites

Steps

Utils

Nuget Packages

Layers

Web

Angular

Component

Model

Service

Guard

Error Handler

HTTP Interceptor

Routes

ASP.NET Core

Postman

Startup

Extensions

Controller

Application

Service

Factory

Domain

Entity

Value Object

Model

Model

Model Validator

CrossCutting

Enum

Database

Context

Context Factory

Context Seed

Unit of Work

Configuration

Repository