FreshMarker Version Variable Fixes

FreshMarker is strongly characterised by KISS and YAGNI. This makes the template engine lean and yet powerful. But in some places, the simplicity leads to careless mistakes.

In the first versions, the system variable .version was defined as a constant for the FreshMarker version. Unfortunately, this meant that the version number was regularly forgotten to be updated before the release.

Generating AsciiDoc from OpenAPI.yml

Sometimes changes to a library are made so easily that it’s not really worth talking about. The Maven Plugin from posts Build Automatisierung mit eigenen Mojos verbessern and Trivial Pursuit – API MarkDown generates AsciiDoc documentation for simple OpenAPI descriptions. So far, the Maven Plugin uses a JSON description as input format. Since the YAML representation is used more frequently, its support would also be desirable.

FreshMarker Template Engine 1.0.0

I am proud to announce the release of FreshMarker 1.0.0! Having started as a small example for blog posts two years ago, FreshMarker has evolved into a robust and versatile framework designed to meet diverse templating needs.

In-Memory Temp Folder in JUnit 5

Java Bibliotheken

While implementing some tests for the Freshmarker 1.0.0 release, I discovered another interesting possibility for a JUnit 5 TempDirFactory implementation. But first things first.

FreshMarker Import Directive

FreshMarker is an embedded Java template engine that focusses on extensibility and simplicity. For this reason, every implementation of an extension is associated with weighing up its pros and cons. For a long time, the import directive therefore remained an unrealised feature.

XOR for FreshMarker

While reviewing the mutation tests for FreshMarker, I noticed an implementation gap in the logical expression. So if something needs to be changed, why not quickly add something new.

Clamp and other new Java 21 methods

Java Bibliotheken

A Java developer always likes to look into the JDK, like a magician in his old tomes, to see if there is an unknown spell, er method, with which he can improve his source code. In fact, Java 21 has introduced a lot of new methods that make everyday life a little easier.

Mutation Testing

Java Bibliotheken

When I first heard about mutation testing, I was – to put it kindly – very confused. The idea that we change our code to see which tests fail doesn’t look particularly promising at first glance. But if you take a closer look at the approach, you realize the potential it holds.

The Java String Template Processor

Java 22

With Java 22, string interpolation is fighting for its place in the Java ecosystem. What works in other languages and many frameworks should now also simplify the work of Java developers. Some wishes are fulfilled for the developers, others unfortunately not and some would never have been expressed. But more on that later.

Custom Temp Folders in JUnit 5

Java Bibliotheken

It is always instructive to look at well-known open source projects to learn from the implementation used. Sometimes you look at the unit tests and start to wonder. A serious problem with large and old frameworks is the time-consuming adaptation to changing environments. Modern features in libraries such as JUnit 5 simplify the code base immensely.