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I’m an independent IT consultant and entrepreneur in the Internet and software business. I’m interested in design, enterprise applications, web apps and SaaS products. I design and develop business solutions and applications. I help companies in terms of software quality and knowledge transfer, e.g. with Angular and Spring Boot.

Automating Java Code Migration with OpenRewrite

Software development constantly evolves, and so do the libraries and frameworks we rely on. Keeping codebases up-to-date is crucial for long-term maintainability but often feels tedious and error-prone when done manually. Fortunately, tools like OpenRewrite offer an elegant solution: automating large-scale code changes in a reliable, repeatable way. In a recent article, Philip Riecks walks through a practical example of how OpenRewrite can be used to modernize Java code. Specifically, he demonstrates how to update outdated Mockito usage — migrating from the ... Read more

Spring Boot Tip: A Simplified Way of Creating ArgumentCaptors with Mockito 5.7.0

Martin Hock recently published this tip on a simplified way of creating Mockito ArgumentCaptors with Spring Boot 3.2.x: 💡 Mockito 5.7.0 (included in Spring Boot 3.2) introduced simplified way for creating argument captors: pic.twitter.com/MEdJ3dlwum— Maciej Walkowiak 🍃 (@maciejwalkowiak) December 13, 2023 Read more

WireMock Spring Boot

WireMock is an API mocking tool that enables developers to simulate REST APIs during testing. In a system-under-test fashion, it allows us to remove external, potentially flaky, dependencies from our test environment to make our unit tests more focussed and more reliable. WireMock Spring Boot is a new library by consultant and prolific open source contributor Maciej Walkowiak that "drastically simplifies WireMock configuration in a Spring Boot and JUnit 5 application". Featuring a fully declarative WireMock setup and automatic Spring environment setup, ... Read more