Scala has popularized the 'Pimp my library' pattern: This is just a fancy expression to refer to the ability to supplement a library using implicit conversions. — Pimp My Library Pattern in Scala Kotlin does provide the same capability. However, it achieves it via extension functions. While the generated bytecode is similar to Java’s static methods, the developer experience is the same as adding functions to existing types. This approach has limitations, though.

I frequently use the Spring Boot framework in my demos. The latest one is no different. It shows how to achieve CQRS using two different code paths: the command part is implemented via Spring Data JPAthe query part via jOOQ My use case is a banking application that offers a REST layer allowing clients to call any parts.

I’ve been recently developing a Spring Boot application, and to speed up my development speed, I added Developer Tools as a dependency. By default, classes loaded in the HotSpot JVM can be updated only if the later runs in debug mode, and only for changes regarding method implementation. This means adding an attribute to an class requires a full restart. DevTools is an improvement over that.