As it was quite hard to find a proper command to replace all empty lines within a text file – including empty lines at the start and end – I wanted to take down the following command which worked for me on macOS:
Remove blank lines within a file with bash Read More »
While using Java and Kotlin with Spring Boot the following exception occurs and it’s quite hard to find how to fix it. The simple solution is to add the following top level config in your gradle file:
duplicate but no duplicate handling strategy has been set – gradle DuplicationStrategy Read More »
Following the documentation using arkade was (as stated in the docs) the fastest and easiest way to get a working local installation running. There are numerous outdated tutorials about how to run OpenFaaS locally but none of really worked in my envrionment. I am using a MacBook M1 Max with docker driver. I have docker
Local OpenFaaS environment with minikube and docker driver Read More »
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 »