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1. Introduction 1.1 Motivation: Event-driven updating without polling In classic web applications, the pull principle still dominates: …

3 Sep 2025 24 min

Design Pattern

1. Introduction and motivation The observer pattern is one of the basic design patterns of software development and is traditionally used to …

1 Sep 2025 15 min

Java

Password security is an often underestimated but critical topic in software development. Databases containing millions of user logins are …

29 Aug 2025 15 min

Java

From my experience, Vaadin has always stood out from other Java frameworks. Of course, it enables the creation of modern web UIs, but the …

19 Aug 2025 6 min

Java

1. Introduction and objectives The first two parts of this series established the theoretical and practical foundations of a URL shortener …

15 Aug 2025 19 min

Java

1. Introduction Why REST integration in Vaadin applications should not be an afterthought In modern web applications, communication with …

24 Jun 2025 28 min

Java

1. Introduction to implementation 1.1 Objectives and differentiation from the architectural part The first part of this series focused on …

20 Jun 2025 20 min

Java

A URL shortener seems harmless – but if implemented incorrectly, it opens the door to phishing, enumeration, and data leakage. In this first …

10 Jun 2025 25 min

Java

A deep look into Java’s HashMap traps – visually demonstrated with Vaadin Flow. The silent danger in the standard library The use of HashMap …

6 Jun 2025 15 min

Java

Vaadin Flow is a robust framework for building modern web applications in Java, where all UI logic is implemented on the server side. In …

20 May 2025 14 min

Java

What is the Java Instrumentation API? The Java Instrumentation API is part of the java.lang.instrument package and allows you to change or …

11 Apr 2025 14 min

Java

Sometimes it’s not enough for something to work - it has to work under load. In modern applications that process large amounts of …

8 Apr 2025 17 min