Question 1

How to handle database migrations in a modular monolith with DDD?

Accepted Answer

The project uses separate database schemas per module, and migrations are managed independently for each module, typically via tools like Entity Framework Core. Check the Infrastructure layer examples for module-specific migration strategies.

Question 2

Modular monolith vs microservices: which should I choose?

Accepted Answer

This project advocates for modular monoliths when deployment simplicity and reduced operational overhead are priorities, while maintaining encapsulation. Opt for microservices only if you need independent scaling, deployment, or technology stacks per module.

Question 3

What are best practices for testing domain models in DDD?

Accepted Answer

Focus on testing the public API of aggregates without mocking internal states, use SUT factories to prepare test data, and avoid overspecification by not relying on internals, as demonstrated in the unit tests section.

Question 4

How to implement event sourcing in .NET like in this project?

Accepted Answer

The Payments module uses SQL Stream Store for event sourcing, with examples on persisting events, projecting read models, and handling commands, emphasizing eventual consistency and stream-based patterns.

Question 5

Can I use this for real-time applications?

Accepted Answer

Not directly, as the core architecture is async event-driven. Real-time features would require augmenting with technologies like WebSockets or SignalR for immediate communication, outside the standard module integration.

Question 6

How to secure APIs with JWT and RBAC in this setup?

Accepted Answer

It implements JWT authentication via IdentityServer and RBAC with fine-grained permissions checked at the controller level, using the User Access module for centralized authorization logic.

Modular Monolith

What is Modular Monolith?

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