Pros of domain-driven-hexagon

• More comprehensive documentation and explanations of DDD concepts
• Includes examples of various architectural patterns (CQRS, Event Sourcing)
• Provides a more flexible and modular structure for larger applications

Cons of domain-driven-hexagon

• May be overwhelming for beginners due to its extensive coverage
• Less focused on a specific application example compared to ddd-forum
• Requires more setup and configuration for a complete project

Code Comparison

ddd-forum example:

export class User extends AggregateRoot<UserProps> {
  private constructor(props: UserProps) {
    super(props);
  }

  public static create(props: UserProps): Result<User> {
    // User creation logic
  }
}

domain-driven-hexagon example:

export class User extends AggregateRoot {
  private constructor(props: UserProps) {
    super();
    this.props = props;
  }

  public static create(props: UserProps): Result<User> {
    // User creation logic with more validation
  }
}

Both repositories demonstrate DDD principles, but domain-driven-hexagon offers a more comprehensive approach with additional architectural patterns. ddd-forum provides a more focused, real-world example of a forum application, which may be easier for beginners to grasp. The code structures are similar, with domain-driven-hexagon potentially offering more flexibility for complex domain models.

Pros of modular-monolith-with-ddd

• Implements a modular monolith architecture, which can be easier to maintain and deploy compared to microservices
• Provides a more comprehensive example of DDD implementation, including bounded contexts and CQRS
• Includes detailed documentation and architectural decision records (ADRs)

Cons of modular-monolith-with-ddd

• Uses C# instead of TypeScript, which may be less accessible for web developers
• Focuses on a more complex domain (meetings and administration) compared to a simpler forum application
• Lacks a front-end implementation, making it less suitable for full-stack learning

Code Comparison

modular-monolith-with-ddd (C#):

public class MeetingGroup : Entity, IAggregateRoot
{
    public MeetingGroupId Id { get; private set; }
    public string Name { get; private set; }
    public string Description { get; private set; }
    public MeetingGroupLocation Location { get; private set; }
    public MemberId CreatorId { get; private set; }
    // ...
}

ddd-forum (TypeScript):

export class Post extends AggregateRoot<PostProps> {
  private constructor (props: PostProps, id?: UniqueEntityID) {
    super(props, id);
  }

  public static create (props: PostProps, id?: UniqueEntityID): Result<Post> {
    // ...
  }
}

Both repositories demonstrate DDD principles, but modular-monolith-with-ddd provides a more comprehensive example with additional architectural patterns. ddd-forum offers a simpler, web-focused implementation using TypeScript, making it more accessible for front-end developers interested in DDD.

Pros of IDDD_Samples

• Covers a wider range of DDD concepts and patterns
• Provides examples in multiple programming languages (Java, .NET, Scala)
• Includes more complex domain models and scenarios

Cons of IDDD_Samples

• Less focus on modern web development practices
• Older codebase with potentially outdated dependencies
• Lacks a complete, end-to-end application example

Code Comparison

IDDD_Samples (Java):

public class BacklogItem extends ConcurrencySafeEntity {
    private BacklogItemId backlogItemId;
    private String summary;
    private String category;
    private BacklogItemStatus status;
    // ...
}

ddd-forum (TypeScript):

export class Post extends AggregateRoot<PostProps> {
  private constructor(props: PostProps, id?: UniqueEntityID) {
    super(props, id);
  }

  public static create(props: PostProps, id?: UniqueEntityID): Result<Post> {
    // ...
  }
}

IDDD_Samples focuses on traditional OOP approaches, while ddd-forum employs modern TypeScript features and functional programming concepts. The ddd-forum example showcases a more explicit creation process and uses a Result type for error handling.

Both repositories offer valuable insights into DDD implementation, with IDDD_Samples providing a broader range of examples across multiple languages, and ddd-forum demonstrating a more focused, modern web development approach using TypeScript and Node.js.

Pros of CleanArchitecture

• More comprehensive implementation of Clean Architecture principles
• Better separation of concerns with distinct layers (Core, Infrastructure, Web)
• Includes example unit and integration tests

Cons of CleanArchitecture

• Less focus on Domain-Driven Design (DDD) concepts
• Simpler domain model, not as rich in business logic
• Fewer real-world use cases demonstrated

Code Comparison

CleanArchitecture:

public class ToDoItemService : IToDoItemService
{
    private readonly IRepository<ToDoItem> _repository;

    public ToDoItemService(IRepository<ToDoItem> repository)
    {
        _repository = repository;
    }
}

ddd-forum:

export class CommentService {
  private commentRepo: ICommentRepo;
  private postRepo: IPostRepo;

  constructor (commentRepo: ICommentRepo, postRepo: IPostRepo) {
    this.commentRepo = commentRepo;
    this.postRepo = postRepo;
  }
}

Both examples show dependency injection and repository usage, but ddd-forum demonstrates a more complex domain model with multiple repositories.