Posts tagged with #jvm

Announcing NKP 0.1: Static Analysis for Kotlin Projects

I’m excited to share the first MVP release of NKP (aNalysis of Kotlin Programs), a command-line tool for analyzing Kotlin codebases and uncovering architectural insights.

software-engineering en jvm architecture kotlin object-functional quality-assurance

Nov 01, 2025 Read more arrow_forward

image

Java in the Technology Radar (JavaSpektrum)

I’ve written a new article for JavaSpektrum: “Java im Technology Radar – Totgesagte leben länger”. The piece looks back at Java’s journey through the eyes of the Thoughtworks Technology Radar...

software-engineering en java article jvm architecture thoughtworks

Sep 03, 2025 Read more arrow_forward

image

Structured Concurrency in Java 24 (JavaSpektrum)

I’ve written an article for JavaSpektrum 2/2025 about Structured Concurrency in Java 24. The article covers JEP 499, Java’s fourth preview of Structured Concurrency, which aims to make concurrent programming...

software-engineering en java concurrency article jvm parallelism architecture

Mar 31, 2025 Read more arrow_forward

image

A short introduction to Kotlin

At a client of ThoughtWorks I gave a talk about the advantages of Kotlin.

software-engineering en kotlin jvm talk slides

Mar 04, 2020 Read more arrow_forward

image

Concurrency in Kotlin with coroutines

Coroutines are a “new” way to handle concurrency on the JVM. I gave an introduction to coroutines in Kotlin at Thoughtworks. This is basically the translation of the german slides....

software-engineering en slides talk kotlin concurrency parallelism jvm

Apr 23, 2019 Read more arrow_forward

image

Talk about coroutines in Kotlin at the parallel 2019 conference

Coroutines are a “new” way to handle concurrency on the JVM. At the para//el 2019 conference, I gave an introduction to coroutines in Kotlin.

software-engineering en slides talk kotlin concurrency parallelism jvm

Feb 21, 2019 Read more arrow_forward

EuroClojure 2017 in Berlin

In my first project for ThoughtWorks the backend is written in Clojure. Since the project was in Berlin, I visited the EuroClojure 2017 which takes place in Berlin this year,...

software-engineering en jvm functional-programming

Jul 22, 2017 Read more arrow_forward

A very good introduction to the best testing framework for the Java platform

In my opinion, the Spock Framework is currently the most convenient testing framework for the Java platform. Since it is built on the Groovy language, it is very expressive.

software-engineering tdd en review jvm

Aug 12, 2016 Read more arrow_forward

image

Ray tracing with Groovy and Java

While I was reading the excellent book by Kevin Suffern "Ray tracing from the ground up", I implemented a ray tracer in Java and wrote a DSL in Groovy, to...

software-engineering groovy java model-driven jvm graphics en

Jul 08, 2015 Read more arrow_forward

Covariance and Contravariance in Scala

The topic of covariance and contravariance is explained in many places (including Wikipedia). This post is my attempt to explain it in my own words, using Scala.

software-engineering scala jvm en object-functional

Jul 06, 2015 Read more arrow_forward

Covariance and Contravariance in Scala

I explain "covariance and contravariance" with some simple Scala examples.

software-engineering scala jvm en object-functional

Jul 06, 2015 Read more arrow_forward

image

k-d-trees with Apache Spark and Scala

This article shows how to use k-d-trees with Apache Spark.

big-data en data scala jvm object-functional

Jul 02, 2015 Read more arrow_forward

Sehr gute Einführung in Scala

Scala ist ein wichtiger Meilenstein bei der Fusion von funktionaler und objektorientierter Programmierung. Diese Fusion ist noch nicht abgeschlossen, sondern ein “Entdeckungs-Prozess”, der noch ein paar Jahre andauern wird.

software-engineering scala de review jvm object-functional

Jun 17, 2015 Read more arrow_forward

image

Using Elasticsearch with Spring Boot - Analyzing the emails with Kibana

This is the last part in a series of four. It shows how to analyse the emails with Kibana.

software-engineering jvm groovy spring

May 28, 2015 Read more arrow_forward

Using Elasticsearch with Spring Boot - Technical background

This is the third part in a series of four. It explains the technical background.

software-engineering jvm groovy spring

May 27, 2015 Read more arrow_forward

image

Using Elasticsearch with Spring Boot - Installation and Usage

This is the second part in a series of four. It shows installation and usage.

software-engineering jvm groovy spring

May 26, 2015 Read more arrow_forward

image

Using Elasticsearch with Spring Boot

This article shows how to use Elastiksearch database with Spring Boot. It is the first in a series of four.

software-engineering jvm groovy spring

May 25, 2015 Read more arrow_forward

image

Reviewer of Java 8 in Action

I bought the book in early access (MEAP) and decided to help as a reviewer.

software-engineering review de java scala jvm object-functional

Dec 17, 2014 Read more arrow_forward

Gute Übersicht und Einführung

An “The Definitive Guide to Grails 2” kommt keiner vorbei, der Grails lernen will.

software-engineering review de web jvm groovy

Nov 11, 2013 Read more arrow_forward

Knapper Einstieg und Überblick auf Spring ROO

Das Buch “Getting Started with Roo” hat nur etwas über 50 Seiten und beinhaltet eine kurze und oberflächige Einführung in die Benutzung von Spring ROO.

software-engineering review de jvm

Dec 01, 2011 Read more arrow_forward

Stellenweise sehr gut, stellenweise nicht ausgereift und zu knapp

Die Programmierung von parallelen und nebenläufigen Programmen mit Shared-Memory und Threads ist kompliziert und sehr fehleranfällig. Als Lösungsansätze wurden z. B. Software-Transactional-Memory (STM), Message-Passing-Architekturen und Aktoren-Modelle entwickelt. In “Programming Concurrency...

software-engineering parallelism concurrency jvm review de object-functional

Dec 01, 2011 Read more arrow_forward

Using Scala and TestNG with Gradle

During the christmas holidays i tried out Scala and TestNG with Gradle.

software-engineering scala tdd jvm object-functional

Dec 30, 2010 Read more arrow_forward

image

Training: Test-Driven Development with JUnit 4

This training teaches test-driven development with a focus on JUnit 4. Other frameworks such as JUnit 3 and TestNG are briefly introduced as well (as of 2009).

software-engineering slides en jvm tdd

Oct 11, 2009 Read more arrow_forward

image

Training: Ant in Depth

Apache Ant offers a lot of capabilities that many teams never end up using. This training dives into Ant’s more advanced features (as of 2009).

software-engineering slides en jvm

Oct 09, 2009 Read more arrow_forward

Groovy, EMF and UML2

I wrote the Groovy EMF builder and the Groovy UML2 builder. These tools use the builder concept of the programming language Groovy to ease the processing of Eclipse Modelling Framework...

software-engineering groovy eclipse model-driven en jvm java

Aug 01, 2009 Read more arrow_forward

Memoization in Groovy with a Decorator

Memoization is a well known optimization technique to avoid repeated calculations. With dynamic programming languages like Groovy it is possible to extend the behaviour of an already exisiting class at...

software-engineering groovy jvm

Feb 27, 2008 Read more arrow_forward

Dynamic Languages Shootout / OOP 2008

The german magazine JavaSpektrum organized the "Dynamic Languages Shootout" contest for the OOP 2008 conference. The challenge was to create a computer game similiar to Scrabble in a dynamically typed...

games groovy jvm parallelism concurrency en

Feb 01, 2008 Read more arrow_forward

Accessing EMF models with JRuby

JRuby provides access to Java packages, so it is possible to use packages created with the Eclipse Modeling Framework (EMF).

software-engineering ruby model-driven en jvm

Jan 27, 2008 Read more arrow_forward

image

6th place at the Dynamic Languages Shootout at OOP 2008

The challenge was to implement Scrabble® in a dynamically typed programming language. I used Groovy and Grails.

games groovy games en jvm

Jan 23, 2008 Read more arrow_forward

image

Writing Eclipse plugins with Groovy

Writing plugins for Eclipse with other languages than Java is not officially supported, but there is a way to write an Eclipse plugin with Groovy only.

software-engineering groovy eclipse en jvm java

Jan 17, 2008 Read more arrow_forward

Eclipse BugDays 2007

I participated at Eclipse BugDays in July, August, September, October, and November 2007 and helped debugging the Eclipse projects JDT, PDE/UI, and ECF.

software-engineering eclipse en jvm java

Dec 01, 2007 Read more arrow_forward

Using UML2 with Groovy

The UML2 project provides an EMF based implementation of the UML 2.x metamodel in Java. With the EMFBuilder it is possible to create and process UML2 models.

software-engineering groovy eclipse model-driven en jvm

Nov 29, 2007 Read more arrow_forward

image

Rapid Application Development with Groovy

While i was cleaning up my hard disk on my Linux in 2007, i needed a program that displays the disk usage graphically. I didn't find a suitable one on...

software-engineering groovy jvm parallelism concurrency en

Nov 01, 2007 Read more arrow_forward

image

Using EMF with Groovy

This article shows how Groovy can be used with the Eclipse Modeling Framework (EMF).

software-engineering groovy eclipse model-driven en jvm

Oct 22, 2007 Read more arrow_forward

image

Editor for the Common Warehouse Metamodel (CWM)

The Common Warehouse Metamodel (CWM) is a standard by the Object Management Group (OMG). The intention of CWM is to define a standard for metadata in Data Warehouses and Business Intelligence applications.

software-engineering groovy eclipse model-driven en jvm data

Oct 01, 2007 Read more arrow_forward

image

Eclipse-Editor for data warehousing metadata with EMF

When i first heard of the Eclipse Modeling Framework (EMF) i got really excited, i tried it out and i wanted to use it.

software-engineering en eclipse jvm java model-driven data

Apr 02, 2006 Read more arrow_forward

image

Eclipse SQL Editor Plugin

I wanted to find out how hard it is to build a language editor in Eclipse. Back then I didn’t know of any open-source SQL editor (and there wasn’t one...

software-engineering en eclipse jvm java

Mar 07, 2006 Read more arrow_forward

image

Graphical Editors with Eclipse

Over Christmas 2004, I built an EMF plugin for family trees. Around Easter 2005, I finally found the time to develop a GEF-based editor for it.

software-engineering en eclipse jvm java

May 10, 2005 Read more arrow_forward