If you don’t want to use different syntax on your mac with sed command then it can be easily replaced with GNU sed by installing it via This installs the program as gsed which is also not handy if you don’t want to write different scripts for Linux and macOS. If you want to get […]
Replace macOS’s sed with GNU’s sed on a mac Read More »
When upgrading to the latest tools and libraries in a Spring Boot application with OpenAPI code generator in place the OpenAPI Kotlin generator introduced jakarta.annotation:jakarta.annotation-api. But with this in place the application refused to start with something like org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat…Caused by: java.lang.IllegalStateException:
java.lang.ClassNotFoundException: javax.annotation.PostConstruct Read More »
I found a quite interesting video about creating a custom bluetooth remote for Sony cameras. The video can be found on youtube. It also links the used source code which can be found on github. Testing with my Sony a6400 I found out that the used pairing advertisement codes look different than explained in the
Sony BLE custom remote for a6400 (ILCE-6400) Read More »
After quite some weeks where I had to use my old Logitech headset again instead of my fancy Audient audio interface plus the Shure mic I finally tried to find the reason why my mic isn’t recognised in teams. The interface is listed normally in the dropdown and all other apps also work absolutely perfect
MS Teams and external audio interfaces Read More »
Performance on MS Teams was very bad on M1 MacBooks compared to other applications. But Microsoft is working on a native osx-arm64 version which I installed. And I have to say that I am blown away from the speed improvement. It’s like day and night. If you’re interesting in trying out non released Teams versions
MS Teams on Apple silicon Read More »
The default configuration of Spring Boot tells quite a lot about errors and software versions used. This is a potential security leak and therefor should be avoided. One step is to get rid of server information from header and default error pages. Result With my suggested changes in place the default error result pages will
Spring Boot Hardening – Disclosed Version Read More »
For REST https://restfulapi.net/resource-naming/ is a very good source to start reading and a guideline for JSON can be found under https://google.github.io/styleguide/jsoncstyleguide.xml.
REST & JSON basics Read More »
I created a github action config for detekt 1.19.0 based on Java 17 because the template from GitHub was using a much older version and also didn’t work for me.
GitHub Detekt action with Detekt 1.19.0 Read More »
I was trying to build a spring boot application based on spring spring-boot-starter-webflux which is based on kotlinx-coroutines-reactor. The API definition was done with OpenAPI-Generator with “kotlin-spring” generator and “spring-boot” library. Setting the configOptions useBeanValidation and reactive to true generates suspendable methods and uses webflux. And adding hibernate-validator allows to use bean validation for every
ArrayIndexOutOfBounds with Kotlin coroutines and Hibernate-Validator Read More »
Using unmodifiable variables – so called values in Kotlin with keyword val – should be the default where possible but it’s not always practical to initialise all values within the constructor. Kotlin offers the option to use “by lazy”. With some common kinds of properties, even though you can implement them manually every time you
Delegate value initialisation with “by lazy” in Kotlin Read More »