my blog. for you.

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Ich bin selbständiger IT Berater und Unternehmer in der Internet und Software Branche. Ich beschäftige mich mit Design, Enterprise Applikationen, Web Apps und SaaS Produkten. Ich entwerfe und entwickle Business Lösungen und Anwendungen. Ich helfe Unternehmen in Sachen Software Qualität und Wissenstransfer, z.B. mit Angular und Spring Boot.

New Java Features From Java 8 to Java 17: A Comprehensive Overview (Including Examples)

Leider ist der Eintrag nur auf English verfügbar.This useful article on Java Features from Java 8 to Java 17 (published on Reflectoring) provides a comprehensive overview of Java language features for each of the major Java versions that have ben released since 2014. Such a list comes in handy not only when dealing with different Java versions for different applications or projects but, especially due to the examples provided, can also serve as a conducive starting point for (re-)familiarising oneself with the ...

Self-Publishing a Book With (Almost) Complete Strangers: A Recap of Our Writing Process for Stratospheric

Leider ist der Eintrag nur auf English verfügbar.This week, Philip Riecks - one of the co-authors with whom I wrote Stratospheric - From Zero to Production with Spring Boot and AWS - published this article about our writing process for that ebook on his new blog about subjects such as freelancing, motivation, indie hacking, or productivity: Self-Publishing a Book With (Almost) Complete Strangers This highly detailed documentation of our writing process not only describes how we went about writing, publishing, and marketing Stratospheric ...

24. April 2022 by Bjoern in Business, Entrepreneurship, Software

7 Practical Design Tips

Leider ist der Eintrag nur auf English verfügbar.Some time ago, Adam Wathan & Steve Schoger of Tailwind CSS and Refactoring UI published this article with "7 Practical Tips for Cheating at Design". While I don't think that you can actually cheat at design, design being a skill that can and has to be learned, practiced, and honed like any other, pragmatic advice such as using colour and font weight for creating information hierarchy can help with achieving some quick wins and reaping ...

10. April 2022 by Bjoern in Software, Web Applikation

Stratospheric – 1.6 Released: AWS CDK Bootstrapping 🏗

Leider ist der Eintrag nur auf English verfügbar.This week, we released version 1.6 of Stratospheric - From Zero to Production with Spring Boot and AWS. The main reason behind this release is that we somehow entirely missed talking about an important topic: Bootstrapping an AWS environment for the AWS CDK. You may have already run into this issue when trying to deploy one of our AWS CDK stacks: Has the environment been bootstrapped? Please run 'cdk bootstrap' We've now added a dedicated section on the ...

3. April 2022 by Bjoern in Enterprise Software, Software, Web Applikation

Spring Framework RCE Vulnerability With War File Deployments on Tomcat

Leider ist der Eintrag nur auf English verfügbar.Yesterday, an RCE vulnerability in the Spring Framework has been announced: Spring Framework RCE, Early Announcement CVE-2022-22965: Spring Framework RCE via Data Binding on JDK 9+ While, as of now, only WAR deployments of Spring Boot applications running under Apache Tomcat seem to be affected, it is still recommended to upgrade to Spring Boot 2.6.6 as soon as possible, even for Spring-based applications deployed as a JAR, because "the vulnerability is more general, and there may be ...

1. April 2022 by Bjoern in Enterprise Software, Software, Web Applikation

Christopher Alexander – Patterns in Architecture

Leider ist der Eintrag nur auf English verfügbar.Sadly, a few days ago, seminal architect and design theorist Christopher Alexander passed away. Having coined the term "pattern language" Christopher Alexander is considered the father of the pattern language movement. It is this term we as software engineers - oftentimes quite casually - refer to when we're talking about design patterns. In 1996, Christopher Alexander gave this compelling talk at the 1996 ACM Conference on Object-Oriented Programs, Systems, Languages and Applications (OOPSLA): In this talk, Alexander ...

27. März 2022 by Bjoern in Software

Performing Effective Code Reviews – A Checklist

Leider ist der Eintrag nur auf English verfügbar.A few years ago, software architect Surender Reddy Gutha compiled a - still quite relevant - Code Review Checklist. All too often, when performing code reviews, we as software engineers tend to focus on minute details such as code formatting rather than the big picture, non-functional requirements, or architecture and security considerations. Perhaps, the problem already originates with the term code review: Rather than reviewing code we are - or should be - reviewing the ...

20. März 2022 by Bjoern in Software

Documenting REST APIs Provided by Express Applications

Leider ist der Eintrag nur auf English verfügbar.swagger-jsdoc is an NPM library that allows us to generate an OpenAPI specification for REST APIs provided by an Express application. swagger-jsdoc consumes YAML-formatted OpenAPI specification segments within JSDoc comments annotated with the @openapi annotation and turns those into a comprehensive OpenAPI specification for our API. This specification, in turn, can for example be used for automatically having a Swagger UI documentation page created for our REST APIs (using Swagger UI Express, for instance). While annotating Express ...

13. März 2022 by Bjoern in Software, Web Applikation

endoflife.date – Dataset with End-of-life Dates for Products

Leider ist der Eintrag nur auf English verfügbar.Recently, I came across endoflife.date, which is a quite useful database of product end-of-life dates. While it also includes hardware products (e.g., various iPhone models), its current main focus is software products, in particular those used in (enterprise) software development, such as Java, Spring, or Angular, or infrastructure and runtime environments like Docker or the Apache HTTP Server. A comprehensive, searchable collection of lifetimes for library and framework versions can come in handy when assessing ...

6. März 2022 by Bjoern in Enterprise Software, Software

Clearing the Spring Security Context During Unit Testing

Leider ist der Eintrag nur auf English verfügbar.Last week I wrote about a minimal Spring Security Context setup for unit testing. I'd like to add just a tiny, yet depending on your use case perhaps quite important, tidbit to that: In case you need to reset a SecurityContext setup, e.g., a mocked user authentication, because, for instance, other test methods from the same unit test class verify behaviour for an unauthenticated application state and hence expect an anonymous user, you can ...

27. Februar 2022 by Bjoern in Enterprise Software, Software

Björn Wilmsmann

my blog. for you.

Reden wir über Digitales.