Rocinante – project automation

After the Rocinante project has mastered some basic functionalities of Protocol Buffer, the project automation is now to be improved by a Maven plugin.

Bitemporal Data Storage

When storing data, their temporal changes are often not sufficiently taken into account. The following example of a club member database shows the problems of simplified temporal data storage and the advantages of bitemporal data storage.

Presentations with AsciiDoctor

Sometimes even developers want to present something. It’s nice when there’s a tool that picks up the developers in their comfort zone. Software developers are a special clientele and have very specific requirements for a software solution for creating and giving presentations.

Of bridges and tunnels – agile system creation

Tunnel constructions are classic waterfall projects in which extensive planning is carried out and then construction can be completed without major changes. There are geological surprises from time to time, but a tunnel plan is, quite literally, set in stone.

Rocinante – encoding and decoding

The third article on Rocinante finally deals with the interesting part of the protocol. How the parts of a message are encoded into the binary Protocol Buffer representation and decoded again. Rocinante uses a two-stage approach. The basis is formed by a ProtoInputStream and a ProtoOutputStream, in which the basic mechanisms are implemented. For each message a generated Proto class with individual read and write methods is based on this.

Rocinante – the class generator

In the first article on Project Rocinante, we discussed the processing of Protocol Buffer definition files with CongoCC. In this post we will create the first Java classes based on this definitions.

Rocinante – a poor mans protocol buffer

For a software developer who wants to improve his own skills, it is always helpful to try out new topics. A nice side effect of such small projects is that you always get new material for articles like this one.

Welcome Gatherers!

With Java 22, the Gatherers (JEP 461) have joined stream processing. Until now, stream processing consisted of three parts: the source, intermediate operations and a terminal operation. While the source and the termination operation were already quite flexible since Java 8, there were few possibilities to break out of the existing set for the intermediate operators.

REST endpoints with filters

Java Bibliotheken

This article is a slightly updated English version of the article “REST Endpunkte mit Filtern”.

In addition to sorting and pagination, filtering is a fairly common action on REST endpoints. In contrast to the first two, however, there is no adequate solution for filtering in the Spring Boot framework. With little effort, however, this can be elegantly implemented with the Spring Boot tools.

REST Endpoints annotated for Cache-Control

Java Bibliotheken

Spring Boot endpoints can be formulated briefly and concisely. Their return values are automatically converted into suitable responses. Occasionally, the developer has to fall back on the ResponseEntity class as a return value. This is the case, for example, when additional HTTP headers are required, such as the Cache-Control header.

Better names for JUnit 5 Test

Java Bibliotheken

The JUnit 5 test library offers a wide range of options for extending the framework and thus simplifying the work of software developers. One of these options is the DisplayNameGenerator, which can be used to modify the generation of test names in the console output. When creating exercises for a course, I was surprised to find that there is a DisplayNameGenerator that replaces underscores with spaces, but none that handles the camel case form. Fortunately, this can be changed.