Architecture

Training from ardalis: "Getting Started: Modular Monoliths in .NET"

Monolith

Monolith pro's

• simple to create
• simple to deploy

Monolith cons's

• hard to keep the code clean
• layered archicture helps

Micro service

Microservice pro's

• scale

Microservice cons's

• complex
• expensive

Modular Monolith

Modular Monolith pro's

• advantages of monolith - better maintainable
• well defined, loosely coupled modules
• if needed, parts can be converted to separate modules (like microserivce, see MassTransit)

Modular Monolith cons's

• easier to keep the code clean

Event Streaming is not Event Sourcing

Event Streaming is not Event Sourcing! https://event-driven.io/en/event_streaming_is_not_event_sourcing/

Vertical Slices

https://github.com/boeschenstein/VerticalSlices

CQS, CQRS

CQRS takes the defining principle of CQS and extends it to specific objects within a system, one retrieving data and one modifying data. CQRS is the broader architectural pattern, and CQS is the general principle of behaviour.

CQRS Levels: https://enterprisecraftsmanship.com/posts/types-of-cqrs/

• Type 0: no CQRS
• Type 1: separated class structure
• Type 2: separated model
• Type 3: separated storage