The Main Thread

User unregistration sounds simple until you look at the rest of the system. In a booking application, “delete this user” is never just one DELETE endpoint. It touches active bookings, foreign keys, historical reads, cache state, and the uncomfortable question every senior team eventually has to answer: is this really a hard delete, or is it deactivation, anonymization, or something in between? Tha...

In the latest video, my co-author Alex Soto shows a test coverage workflow I actually like. I do not care about 100% coverage as a badge. I care about whether the important parts of the system are tested. Past that point, the number gets expensive fast. In some domains you still need to hit a minimum threshold because regulation says so. Ok. That might be a real constraint. Building out tests shou...

Versioning a REST API is one of those architectural chores that everyone knows they need to do, but nobody actually wants to implement. As your data models evolve, you have to maintain backward compatibility for existing clients while serving new data structures to updated ones. Historically, this meant writing a lot of boilerplate: duplicating entities, adding routing logic, and carefully wiring...

Legacy systems are everywhere in enterprise environments. They run critical business processes, hold decades of data, and often cannot be rewritten easily. When teams start experimenting with AI agents, the first instinct is usually to expose new APIs or refactor the existing system so an LLM can interact with it. That approach breaks down quickly. Large enterprise applications have complex depend...

Today’s episode is a special one for me. I’m welcoming my friend and colleague Alex Soto to the show. If you follow the Quarkus ecosystem, you already know Alex. He has been shaping developer experience around Java and cloud-native for years. And today, he’s doing something very practical. He takes an existing Quarkus application. No greenfield. No clean slate. A real project. And he shows how to...

When Alex talks about persistence, he usually does not start with syntax. He starts with consequences. In his recent deep dive on Jakarta Data in Quarkus 3.31.0 , the real story is not a new annotation or another repository interface. The story is about moving database correctness from runtime to compile time . This matters because most persistence bugs are boring. They are not deadlocks or exotic...

The U.S. AI Action Plan , while aiming to accelerate AI innovation by reducing "red tape" and fostering private-sector growth , explicitly states it does not override critical existing regulations like HIPAA (for healthcare) and SOX (for financial reporting) . Instead, it seeks to harmonize AI adoption with these legal obligations . The plan acknowledges that complex regulatory landscapes have slo...

I just recently had a guest post up by Martin Stefanko and with Alex joining the rain, we now have a wonderful short intro up too! This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit www.the-main-thread.com

A little later than usual, but here it is. The weekly recap. Postponed due to RH Summit. NOTE: This is an AI generated Podcast with Google NotebookLM * Local AI with LangChain4j and Quarkus: Build an Email Task Extractor with Tool Calling - Published on May 13, 2025 . This post introduces building a local-first AI application using Quarkus, LangChain4j, and local Large Language Models (LLMs) via O...

NOTE: This is an AI generated podcast exported from Google’s NotebookLM. I am still experimenting with this and am very excited to read about your feedback! In this packed fourth episode of Enterprise Java and Quarkus for Decision Makers , we navigate the rich terrain of modern Java development with Quarkus. From advanced CDI tricks like reactive dependency injection and custom scopes, to security...

Please remember: This is generated with NotebookLM from Google based on last weeks articles. Still an experiment. Feel free to give me feedback how useful this is for you and if you like it or not! This week's topics cover various aspects of modern enterprise Java development . The articles discuss practical steps for building and deploying cloud-native Java applications , particularly using Quark...

Please remember: This is generated with NotebookLM from Google based on last weeks articles. Still an experiment. Feel free to give me feedback how useful this is for you and if you like it or not! In this week's episode, we explore key insights from the latest blog posts shaping the future of enterprise Java development with Quarkus. We start by addressing the top questions junior developers have...

This is a weekly recap of the articles published fed into NotebookLM and converted to a podcast episode of my two wonderful hosts discussing the high level implications of the individual pieces. I consider this an experiment. LMK what you think and if this is helpful or at least entertaining. Last week's articles centered around building various aspects of enterprise Java applications using the Qu...