Tomas Tulka's Blog
Random thoughts about programming and other stuff.
How Cohesion and Coupling Correlate
Cohesion done right reduces coupling and complexity of systems.
The Interface Segregation Principle with Lambdas
How to implement the ISP using simple functions to reduce coupling and complexity at the same time.
Monolithic Objects
Don't model the real world, model your business!
Java Records Aren’t Necessarily Evil
How do Java Records fit to the object-oriented design?
Too Many Interfaces
Interfaces are good stuff. Does that mean the more the better?
No Internals in Configuration API
Configuration is part of the application API, so the same rules apply to it: no leak of implementation detail.
Colored Services
Defining service boundaries is hard. Let's bring some colors and make it fun!
What Is a Repository
Which purpose has a Repository? To which layer does it belong to? And how to implement it correctly?
Domain Collections
Collection, List and Set are terms very familiar to developers but hardly used by business experts. Therefore, they should not be part of the domain (API).
Events vs. Commands in DDD
There are situations where events and commands seem to be a good solution for a problem. Where to use events and where are commands the best fit?