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This is mainly a note to self on how to build inheritance hierarchies (e.g. Animal -> [Cat / Dog] ) with Play-JSON. Documentation can be found here: Play-JSON Akka-Http Play-Json

As mentioned in my previous articles about using VAVR together with Spring, use the following classes to make VAVRs Option and all Collection types based on Seq work correctly with SpringDoc. Just place them in a package that gets scanned by Spring! A big shoutout to bnasslahsen who provided me with the VavrOptionSupportConverter that I […]

During the Corona crisis, I was in urgent need of a Webcam. While I thought I ordered a Logitech C930e Business webcam, I got shipped a C930c which is basically the same one but the chinese version. As it is now the second time I was spending time to find drivers / controller software for […]

As already documented in my previous article about Spring and VAVR, I’m using the Future’s provided by VAVR as return types in my controller. What I’m also using, is the SpringDoc OpenAPI library to generate my OpenAPI specification. By default, SpringDoc has no clue about VAVR and how to handle its Future type. Thus, by […]

Learn how to use the Future of Vavr in a Spring Boot Project

If you’re developing Scala apps and let them be checked by Codacy, you might have enabled the check “Imports should be sorted alphabetically“. What sounds easy, isn’t in fact. Here are my findings, summarised as example imports. I hope this helps someone.. I’m sure, I’ll check back on this page in about a week again….

In an event-sourced environment, you sometimes have to introduce an artificial delay to some actions to make sure read-sides had the time to update themselves. If you’re using the classic routing mechanism with a routes-file, you can add such a delay declaratively, like here: This would delay the response of the update-action by 800 Milliseconds, […]

If you have to create a stored procedure in your PlayFramework Database Evolution Script, make sure to properly escape your semicolons (by using two semicolons):

I recently wanted to play a DVD, where I only had the bare folder structure. KODI is supposed to support this, but its not working yet, so I ended up creating the dvd-image on my server myself. This assumes, that you have stored the VIDEO_TS folder in my_dvd Thanks to Ron999 in the Ubuntu-Forums

Recently, I’ve implemented a Swagger-API with Play. As I’ve published a new version of the API, I wanted to make a CHANGELOG available. So the question was, where to store this file.. a blog or some other external resource felt plainly wrong, so I decided to put it right next to the code.


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