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?

Multitenancy was and still is a very popular and successful architectural pattern of the last decades. But, that is likely to change with the advent of cloud computing.

From time to time I attend discussions about OOP. Every time someone comes up with the argument of dealing with persistence. The typical question can be reduced to “should an object persist itself or rather be persisted?” I believe the question is fundamentally wrong.

There are a lot of articles about the SOLID principles. But usually a different example for a particular principle is to be found. Instead, would it be nice to demonstrate all of them on a single code snippet?

Abstract classes typically offer one or more concrete methods. These must be tested as well. There are several ways how to do it, but which one to choose?

Object-oriented approach is a mighty concept making software more maintainable, which means cheaper and easier to understand. Problems come at boundaries, where objects have to be passed on into a different layer or another system. There, the objects become just data and should be treated like that.

Noone wants to write one thing twice. Reducing duplicates makes code shorter and clearer. How much this applies for test code?

I really like Test-Driven Development (TDD) and apply it almost always. The problem with TDD is that it focuses too much on working software.

One reason I really like the serverless architecture approach is being pretty selfish: one has to care only about what matters - the code.

How to proceed when shared data are needed?