WebSockets using Java and JavaScript
A basic, self-contained WebSockets demo where messages generated by Javalin (Java) are sent to a web page containing a DataTable
Welcome
a blind man in a dark cellar looking for a black cat that isn't there
not again in all the world's turning will there be terrains so wild and barbarous to try whether the stuff of creation may be shaped to man's will or whether his own heart is not another kind of clay
Eclipse, Maven and Tomcat - A Basic Set-Up
A minimal guide to setting up a minimal web application in Eclipse, using Maven as the dependency manager (as opposed to using an Eclipse Dynamic Web Project).
RabbitMQ's Management API
It’s possible to access a wide array of data about your RabbitMQ installation using the RabbitMQ management API - a REST API which returns JSON responses. Some of the data can be a bit unintuitive without an explanation, and the documentation was initially a bit hard to find… Here are some notes…
Spring Boot Demo for DataTables Server-Side Processing
A small demo app showing some features of Spring Boot for handling a Thymeleaf template, a JSON request, using Spring JdbcTemplate, with some Java records, lambdas and streams. The demo uses a server-side DataTable for the demo. Not intended for production use.
Jakarta EE 9 on Tomcat 10 - A Basic Set-Up
A very basic Maven-based set-up for a Jakarta EE 9 web app (servlet) running on Tomcat 10, using NetBeans 13.
Two Ways to Integrate an SSL Certificate Into a Web Site
Two different configurations for my SSL certificate: one for Tomcat and another for embedded Jetty.
Java Class Object Encodings - Summary Table
Because I can never remember what the abbreviations mean.
How to Break Java's Type Safety System
A simple-looking piece of code which results in something other than a list of
Integer values being stored in a List<Integer> object.Notes on Floating Point Numbers in Java
Some notes to self about inaccuracies in floating point values.
Converting File Formats Using Python 3
I recently needed to convert text files created by one application into a completely different format, to be processed by a different application. The source files did not have line terminators. In some cases, the files were too large to be read into memory (without causing resource problems). A small Python script to the rescue - during which I learned about callables and sentinels.