Blog

Command Line Tools in Swift: Words

Let’s write a simple command line utility in Swift.

The perils of shared code

In this blog article, I want to examine why using a sharing code between microservices may sound attractive in the first place and why it can cause bigger problems than the ones you try to solve.

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What’s in a Name: Architecture

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ROCA vs. SPA

Currently, a lot of companies are migrating from Desktop applications (mostly written in Java) to Web applications for their products as well as for their internal tooling. When they start with this process they often ask themselves: Which technologies should we use to build our Web application? Should we use Angular.js or React? Or should we go with recommendations like ROCA instead of a Single Page Application?

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Error Handling in Go

Two commonly perceived problems of the programming language Go are that handling errors is verbose and repetitive parametric polymorphism is not available This post is about the intersection of those problems and Rob Pike’s recommendation on the former.

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Solving the wrong problems

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What’s in a Name: Transparency

The term transparent denotes something translucent, where light can shine through. It is, for example, used in context of economics (transparent markets), meaning markets where much is known by many, and nothing is hidden. Sometimes geeks tend to inverse this meaning, saying transparency where they mean opaqueness. This post illustrates that your favorite XY-framework by no means makes XY transparent for developers.

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Transclusion in self-contained systems

Frontend integration in the web is a huge topic. This post deals with the aspect of transclusion of other systems' content in the DOM of a web page.

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Triple Booting a Mac

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Why RESTful communication between microservices can be perfectly fine

Recent debates about REST versus message passing in microservice communication have led to some confusion. What is meant with asynchronous communication in this context and why is REST a perfectly valid choice?

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Horizontal automation – a waste of time.

Automation of server administration tasks is a waste of time.

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Web Scraping

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git pull gotchas

The ever-so-convenient git pull isn’t really all that convenient all that often. This piece explains why not, and what to do instead.

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iOS: Writing to Core Data in your Today extension

This blog post gives guidance on how to propagate changes in Core Data made by a Today extension to the host app and handle them properly.

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Auto Layout in iOS: How to avoid the common mistake

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Play 2.4 with Guice and MyBatis

The Play Framework is getting more popular and Version 2.4 finally includes Dependency Injection as the default mechanism to access central resources instead of singletons. This blog post explores what is necessary to combine MyBatis with Play using its default DI Framework: Guice. Batteries (code sample) included!

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What’s in a Name: Consistency

The term consistency has several different meanings. This post identifies and clarifies those - especially consistency as synonym for conceptual integrity, one of the most important features for long-lasting software systems.

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Reliable Web Clients

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Declarative HTTP API Testing with gabbi

While HTTP APIs are ubiquitous these days, testing and documenting such APIs remains somewhat awkward: Tests usually consist of procedural code that is specific to the respective language or even framework - which is neither very expressive nor easy to maintain.

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A day full of Clojure - organizing the first German ClojureBridge workshop

During the last years a lot of initiatives focusing on increasing diversity in IT and getting kids into IT have emerged. Last weekend the first German ClojureBridge workshop took place in Solingen. Another small but important step towards a diverse IT world.

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Per request debugging with Log4j 2 filters

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What’s in a Name: Reactive

The term reactivity is overloaded with several different meanings. This post tries to identify and clarify a few of them…

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Using Vector Assets on iOS

Vector graphics provide numerous advantages, especially when developing for mobile devices in a constantly expanding array of different screen sizes and pixel ratios. How to get them to work in an iOS app?

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Functional Validation in Scala

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Why You Should Avoid a Canonical Data Model

As an enterprise architect, you might be tempted to strive for a canonical data model for your systems’ interfaces. That’s not a good idea.