Extracting field with fluentd

While playing around with fluentd the need came up to extract data nested deep into the logging input and add it as a flat field to the output. If you're not familiar with fluentd (I'm not): it's similar to logstash in that it collects logs from a variety of sources, filters, transforms and categorises them … Continue reading Extracting field with fluentd →

Easily convert Github repos into Maven dependencies on the fly

TL;DR: JitPack converts Github repos to Maven repositories in near real time. Publishing dependencies to Maven central is hard and I don't care what everybody else says. Every time I need to publish a new release of one of my OSS projects I know I'll waste at least half a day. I wish it was … Continue reading Easily convert Github repos into Maven dependencies on the fly →

Skype and VLC cannot use v4l2loopback video device

I'm playing around with using DSLR cameras as webcams with gphoto (CLI to cameras over USB) and v4l2loopback (dummy video devices), which works with OBS but neither Skype nor VLC which will either show a black image or fail with an error message. Running VLC in verbose mode and digging a bit around showed that … Continue reading Skype and VLC cannot use v4l2loopback video device →

Function pointers in Java

Overview The last post about reactive programming introduced an experimental library which, among other things, implements method references (aka function pointers) for Java. If Java allowed for such a syntax, I could imagine a succinct example: class TestClass{ int add(int a, int b){ return a + b; } public void test(){ FunctionPointer fp = TestClass.add; … Continue reading Function pointers in Java →

AWS diaries: serving HTML from lambda

AWS lambda is a neat feature that runs code in response to requests and transforms the code's output into some response. Requests can be an event occurring in the AWS platform such as an S3 modification or an HTTP request. The response is an MVC-style model which needs to pass through some network component, like … Continue reading AWS diaries: serving HTML from lambda →