I;ve been interested in CP/M for a while. The source code for CP/M from “way back in the time tunnel” is available at the CHM and multiple other places. The challenge however was that CP/M source is in assembler code for 8080 and z80. I wanted to run it on i386 hardware. So, with the…
A typical Minecraft world, which is made of voxels, is 128 blocks high and 2048 blocks wide and deep, for a total volume of 536,870,912 blocks. We’ll call it 500 million. So now that we have LLM’s like Claude, we can get some advice on how to build bigger worlds, which I did. I asked…
We have an Arctic Spa at our house which we enjoy. Recently, an OpenAPI spec has been published for it, so I decided to write a Java wrapper so I could control the spa myself, and monitor temperature with Prometheus and Grafana. The resulting code is here. The wrapper class “com.khubla.kspa.Spa” takes care of all…
My preferred server OS is FreeBSD. Each time I install it, I have to go through numerous steps to secure it. So, to avoid that effort, and to make sure I get it right each time, I’ve created an Ansible playbook to automate the entire process. You can learn about it here. Some of the…
When building database ORM code, I prefer to use ebean, and I prefer to use DAO‘s. Since DAO’s are simple to make generic, I have a Generic DAO I use for all projects. I’ve finally decided to open-source my DAO code, and you can find it here https://github.com/teverett/ebean-dao.
There are new release builds for some of the more widely used khubla.com libraries, resulting for patching for the log4j vulnerability. They are: ParadoxReader <groupId>com.khubla.pdxreader</groupId><artifactId>pdxreader</artifactId><version>1.6</version><packaging>jar</packaging> OLMReader <groupId>com.khubla.olmreader</groupId><artifactId>olmreader</artifactId><version>1.9.0</version><packaging>jar</packaging> JVMBasic kPascal
I’ve recently been quite interested in Graph languages, not for Graph Databases, but for representing information, in code that is essentially “things” and “relationships”. For example, one perspective on Organizations is that they are simply representable as people, systems and the information that flows between them. Those three building blocks are, in theory, enough to…
I recently had reason to get to know OpenAPI at work, so I decided to become familiar with it. I have a HomeSeer home controller at home, which exposes a JSON API, so I decided to write a Java OpenAPI server to expose the JSON API over OpenAPI. The net result is hsOpenAPI. It exposes…
After all, now that we have wireless thermostats, door locks, outlets, dimmers, alarms, garage doors, and motion sensors, it only makes sense to publish events onto a Service Bus. In my case I used Mosquitto in a FreeBSD jail as my broker. My home controller is a HomeSeer. There are MQTT plugins available, but I…
I recently got a call from a friend who has a library of thousands of PDF documents. He wanted to know there was a such thing as a personal search engine that could index his library of documents, and allow full text search inside of them. I have a giant document library too, including PDF…