Thomas Vitale ☀️

@thomasvitale.com

1832 Followers 569 Following

Software Engineer 📚 Author of “Cloud Native Spring in Action” 🛳️ CNCF Ambassador ☕️ Java Champion 🍃 Creator of @arconia.io for Spring Boot 🎙️ International Speaker 👨‍💻 OSS. Work with Java and Cloud Native.

The box of Reachy Mini, robot built by Pollen Robotics and Hugging Face.

Upgrade to Spring AI 2.0

Migrate your Spring Al 1.x application to 2.0 using OpenRewrite and Arconia open-source migration recipes.

> arconia update spring-ai --to-version 2.0

Use the Arconia CLI or the OpenRewrite Gradle/Maven plugins.

Upgrade to Spring Boot 4.1

Migrate your Spring Boot 3.5 or 4.0 application to 4.1 using OpenRewrite and Arconia open-source migration recipes.

> arconia update spring-boot --to-version 4.1

Use the Arconia CLI or the OpenRewrite Gradle/Maven plugins.

- Spring Framework 7
- Jackson 3
- JUnit 6
- Testcontainers 2
- Spring AI 2

Concerto for Java and AI: Building Production-Ready LLM Applications
Thomas Vitale
OreDev Conference

Upgrade to Spring Boot 4

Migrate your application to Spring Boot 4 using OpenRewrite and Arconia open-source migration recipes.

> arconia update spring-boot --to-version 4.0

Use the Arconia CLI or the OpenRewrite Gradle/Maven plugins. It covers:
- Spring Framework 7
- Jackson 3
- JUnit 6
- Testcontainers 2
- Spring Boot 4

LLM traces in OpenLit, showing information about model, token usage, prompt, completion, and parameters.

Alina Yurenko on stage at Spring I/O

Alexander Chatzizacharis on stage at Spring I/O

"Arconia for Spring Boot: Dev Services, Automated Migrations, and Seamless Workflows" by Thomas Vitale at Spring I/O

Main stage at Spring I/O

Arconia for Spring Boot: Dev Services, Automated Migrations, and Seamless Workflows

By Thomas Vitale

Spring I/O 2026
Barcelona

Getting the stage ready. Electric piano in the foreground. Stage with red curtains in the background.

Bar chart titled 'What are your main friction points delivering a feature to production?' showing 219 votes. The chart lists the following friction points with varying bar lengths: License approval delays, False positive CVEs blocking releases, Slow manual approval processes, Lack of automation in compliance checks, Dependency management chaos, Supply chain security doubts, Platform/operation team bottlenecks, and Other.

I'm excited to speak at Cloud Native AI + KubeFlow Day Europe
23 March | Amsterdam, The Netherlands

A view of a cloud native platform running on Hetzner Cloud, built on top of Kubernetes, and using these tools to build the platform capabilities: Carvel, Contour, cert-manager, Kyverno, Flagger, Knative Serving, CloudNativePG, OpenTelemetry, Flux, and Crossplane.

I'm speaking at "Platform Engineering Day Europe"
23 March | Amsterdam, The Netherlands | #PLATENGDAY

Screenshot from Qwant telling me my access is temporarily blocked.

21st Century C++, presentation by Bjarne Stroustrup

Michael Lind Mortensen on stage at Tech Hub Aarhus Day

The WHY Factor

What problem does it solve?
How ready is it for production?
You get a great dev experience?

Ophelia Zhang Dalsgaard on stage at Tech Hub Aarhus Day

Stage with my intro slide showing: “Java and AI: Building Production-Ready LLM Applications”

Kasper Nissen on stage at Tech Hub Aarhus Day

Rene W. Schmidt on stage at Tech Hub Aarhus Day

Tech Hub Aarhus Day kicks off

The main stage at Tech Hub Aarhus Day

Arconia CLI
Supercharge Your Spring Boot Workflow

brew install arconia-io/tap/arconia-cli

# Run your Spring Boot application during development
arconia dev

# Build your application as a native executable
arconia build --native

# Run tests for your Java application
arconia test

# Build a container image using Cloud Native Buildpacks
arconia image build buildpacks --image-name ghcr.io/thomasvitale/myapp

# Migrate your application to Spring Boot 4.0
arconia update spring-boot --to-version 4.0

Thomas Vitale will be a speaker at Tech Hub Aarhus Day on March 12, 2026.

Thomas Vitale is a senior software architect and author of "Cloud Native Spring in Action" book

His session is titled "Java and AI: Building production-ready LLM Applications (Without the Hype)"

Java code snippet:

---
void main() {
IO.printin("Hello, Java!");
}
---

It can be run from a CLI as follows:

---
java Main.java
---

I stopped using Twitter two years ago, and moved to Bluesky. In 2026, I will encourage more people to join the Bluesky community and support them in making the switch.

DanmarkSkifter

In 2026, I will complete the migration from Google Drive, Google Docs, and Google Sheets to Proton Drive, Proton Docs, and Proton Sheets.

I am speaking about:
Modular RAG Architectures with Java and Spring AI

Thomas Vitale
Software Architect - Author of "Cloud
Native Spring in Action" - OSS
Contributor

2026-01-22
15:00-16:00 CET | 09:00-10:00
EST

jChampions Conference
https://jchampionsconf.com/

My GitHub public activity stats from 2025.

🍃 Docling Java & Spring AI 📄

Prepare your documents for RAG and GenAI applications
using Docling Java and Spring AI.

Code example: https://raw.githubusercontent.com/arconia-io/arconia-examples/refs/heads/main/arconia-docling/retrieval-augmented-generation/src/main/java/io/arconia/demo/DoclingRagApplication.java

Arconia Docling

Prepare your documents for RAG and GenAI applications using Docling Java and Spring Boot.

Image includes code available here: https://gist.github.com/ThomasVitale/06932a1e872935de7d4587a4519eb76f

Upgrade to Spring Boot 4

Migrate your application to Spring Boot 4 using OpenRewrite
and Arconia open-source migration recipes.

> arconia update spring-boot --to-version 4.0

Use the Arconia CLI or the OpenRewrite Gradle/Maven plugins.

It covers:
- Spring Framework 7
- Jackson 3
- JUnit 6
- Testcontainers 2
- Spring Boot 4

Upgrade to Spring AI 1.1 brew install arconia-io/tap/arconia-cli arconia update spring-ai

dependencies {
implementation 'io.arconia:arconia-opentelemetry-spring-boot-starter'
testAndDevelopmentOnly "io.arconia:arconia-dev-services-lgtm"
}

Kenya Java User Group presents

Building Al Applications with Java, LLMs, and Spring Al

Thomas Vitale

Date: Tuesday, 25th November 2025
Time: 8:00 PM - 9:00 PM EAT
Location: Google meet

Front page from Hacker News. My blog post "Dev Services for Spring Boot Using Arconia" is #10.

A graph showing that AI-generated content has surpassed human content in 2025. This process started in 2022 when ChatGPT was launched and had an exponential increase since then.

An upright piano on a stage with soft lights, right before the beginning of an improv comedy show.

Program:

void main() {
IO.println("Hello, Java 25!");
}

Command:

java Main.java

Arconia OpenInference for Spring AI. You can use it to instrument your applications and integrate with Arize Phoenix, whose screenshot is included in the image, showing the spans in an AI trace.

dependencies {
implementation 'io.arconia:arconia-openinference-semantic-conventions'
implementation 'io.arconia:arconia-opentelemetry-spring-boot-starter'

testAndDevelopmentOnly 'io.arconia:arconia-dev-services-phoenix'
}

The book “Cloud Native Spring in Action: With Spring Boot and Kubernetes” is included in the dataset of pirated books used illegally to train LLMs.

Arconia Docling: Document Processing + AI
See code: https://gist.github.com/ThomasVitale/06932a1e872935de7d4587a4519eb76f

Error from "Language Support for Java(TM) by Red Hat" in VS Code, unable to use the GraalVM package in the Nix Store.

dependencies {
implementation 'io.arconia:arconia-opentelemetry-spring-boot-starter'
}

Screenshot of the new Ollama desktop application with a chat interface that lets you pick one of the local models and ask questions, including questions about your documents.

{
description = "A flake for Java development environments";

inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
java-toolbox.url = "oci://ghcr.io/thomasvitale/java-toolbox";
};

outputs = { self, nixpkgs, java-toolbox }: {
...
};
}

Chatbot from Lumo, a confidential, private, European AI Assistant by Proton.

An acoustic piano on stage.

Thomas and Alex with the Nanowar of Steel

Mauricio and Nele on stage at JNation

Marcus Hellberg talking at JNation

Thomas and Marcus eating Portuguese sweet treats while Alina is presenting

Holly Cummins presenting at JNation