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Blog

Progressive Web Components

This is a write-up of the “Progressive Web Components” presentation at GOTO Berlin.

Self-contained Systems: A Different Approach to Microservices

Microservices are the current hype in the Software Architecture community. However, microservices can be used in many different scenarios to reach different goals. Self-contained Systems (SCSs) are one approach to achieve some of those goals while avoiding many common pitfalls.

Command Line Tools in Swift: Words

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.

What’s in a Name: Architecture

The term architecture is used with slightly different meanings throughout the IT industry. This post clarifies what (software) architecture is all about - and which misunderstandings might linger on your way to common understanding.

ROCA vs. SPA

Comparing two architectural styles with a concrete example

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.

Solving the wrong problems

Instead of rushing to an engineering solution to a problem, we would often be better off by lying back and determining the root cause of our engineering problem, which is often an architectural one.

What’s in a Name: Transparency

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.

Triple Booting a Mac

Installing a triple-boot environment on a Macbook Pro is not as straight-forward as one might think or read on the internet. This guide explains how to install Windows 10 and Linux (Ubuntu) alongside with OSX and share data via a common partition. As an add-on, I explain how to access the raw partitions to boot the foreign OS not only natively but also in a virtual machine.

Why RESTful communication between microservices can be perfectly fine

Horizontal automation – a waste of time.

Automation of server administration tasks is a waste of time.

Web Scraping

This blog post provides examples how to implement web scraping using HtmlUnit, Selenium or jaunt and compares them.

git pull gotchas

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.

Auto Layout in iOS: How to avoid the common mistake

Creating and adding new views using Auto Layout often results in missing views when running the app because the flag that determines whether a view’s autoresizing mask is translated into Auto Layout constraints has not been turned off for each new view. This blog post provides a solution on how to never run into this situation again.

Play 2.4 with Guice and MyBatis

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.

Reliable Web Clients

Microservices can make teams and systems more independent but also more vulnerable to the fallacies of distributed systems. Initially I thought this blog post is going to be about how to build reliable web clients with Akka and Akka Persistence. While this is an interesting topic by itself, I now think it is more crucial to first understand the underlying problems and trade-offs before we learn how to get around them.

Declarative HTTP API Testing with gabbi

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.

Per request debugging with Log4j 2 filters

Customers quite regularly call on me to support them when an application is not behaving as expected. On a development machine there are a lot of ways and utilities to analyse the situation. But troubleshooting the erroneous application behaviour in production environments quite often limits your tool belt to a minimum.

What’s in a Name: Reactive

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?