Posts

Showing posts with the label Java Backend

A New Collection of Thoughtful Learning Apps — Now Available on iOS & Android

Image
I’m excited to share a set of mobile apps I’ve recently completed and published on both the Google Play Store and the Apple App Store. These apps are designed with a simple goal in mind: to make meaningful, structured content more accessible, whether you’re studying theology or improving your English vocabulary. 📱 Now Available on Both Platforms All apps are live and available for download: Google Play Developer Page: https://play.google.com/store/apps/dev?id=5835943159853189043 Apple App Store Developer Page: https://apps.apple.com/ca/developer/q-z-l-corp/id1888794100 📖 Theology & Confession Study Apps For those interested in Reformed theology and classical Christian teachings, I’ve developed a series of apps that present foundational texts in a clean, focused reading format: The Belgic Confession Canons of Dort Heidelberg Catechism Westminster Shorter Catechism Each app is designed to provide a distraction-free experience, making it easier to read, reflect, and revisit these im...

Spring Boot 4 Upgrade Pitfalls Guide: Java 21, Jakarta, Jackson 3, and Copilot Automation

Image
Spring Boot 4 Upgrade Pitfalls Guide: Java 21, Jakarta, Jackson 3, and Copilot Automation Spring Boot 4 introduces major ecosystem changes and many teams are planning to upgrade their applications to Java 21 and Spring Boot 4.0.x . However, real-world upgrades often reveal multiple compatibility issues such as: Jakarta package migration breaking compilation Jackson 3 JSON behavior changes Spring Cloud Gateway configuration updates Test framework migration issues Micrometer / Observability runtime errors This article summarizes a production-ready upgrade strategy and demonstrates how to use GitHub Copilot Agent to automate much of the migration work. Table of Contents Why Upgrade to Spring Boot 4 Recommended Upgrade Strategy Using GitHub Copilot for Automated Migration Java 21 Upgrade Spring Boot 4 Upgrade Jakarta Migration Jackson 3 Changes Spring Cloud Gateway Changes Common Upgrade Pitfalls Upgrade Verification Checklist Why Upgrade to Spring...