This is the document I created when I made the presentation for Eonics on Hack Night 21. Make sure to watch the document for a bit of history about Reactive programming. The project has since moved to GitHub on https://github.com/jesperancinha/kitten-house-care-parent. It has now been converted to Kotlin and the test branches are no longer available. If you have any questions, please post them on GitHub, or alternative post in the community on my channel jesprotech on YouTube. The session took place in 19th February 2020 at the offices of EONICS in The Hague. The whole story (in dutch) is available to read on their website here https://www.eonics.nl/story/open-hack-night-21-reactive-programming-in-spring-webflux/