Developer Blog

Implementing At Least Once Delivery With RabbitMQ and Spring's RabbitTemplate

Message Delivery Characteristics First some theory about delivery semantics in messaging systems. When a system wants to communicate via a message broker the developer needs a clear understanding of the delivery semantics. At first one needs to know if and how often a message will be delivered to the broker (and potential consumers): At most once - the message is delivered at most once but also not at all.

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Code Coverage with significance

83,9% - what does that even mean? Conversations about unit test coverage usually sound like this: A: “What’s your coverage?” B: “About 83,9%” C: “Meh. Solid.” A: “Solid? That’s incredibly high!” D: “Ours is 40% but we have a lot of generated code so it’s still high.” This shows that the perception of code coverage is highly subjective and most of the time does not have the informative value that a precise percentage indicator like "

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Breakout Session - how to prototype your enterprise project hackathon-like

This is the story of my team creating something awesome within one day. It begins in November of 2017 at "Hack your Office", a 24-hour hackathon hosted in cooperation by my employer synyx and our customer dm-drogerie markt. Although it was an excellent hackathon, this is not the day I am refering to but it was on this day when the idea was born. Several of my team members from dm where participating in the hackathon, even Matthäus - one of our product owners - joined us.

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An Image Slideshow Shortcode For Hugo

Creating static web sites with Hugo is fun and fast but providing a convenient shortcode to smoothly cross-fade an unknown number of images in a blogpost gets a bit tricky… So let’s go!

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Using Travis CI to deploy to Maven repositories and GitHub Releases

This post outlines the steps needed to simultaneously deploy to Maven repositories and to GitHub Releases. Every time a tagged commit is pushed, a Travis CI build will be triggered automatically and start the release process. This blog post uses Sonatype Nexus as an example for a Maven repository manager. Preparing GitHub Releases Sergey Mashkov has written a Maven plugin that allows us to create a new release on our project’s releases page and upload our build artifacts to a release.

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Implementing a waiting component with user experience in mind

Giving fast feedback to users has been improved by single page applications over the request response cycle. However, there is one serious downside with this approach. Elements are popping out of the wild on various sections everytime. Particular data loading indicated by a waiting animation is affected with this phenomenon. In this blog I’d like to present you our solution of a UI component that takes care about delaying the rendering of the animation.

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