Quarkus at JavaZone 2025

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Event Description: JavaZone is the biggest community-driven Java conference that has been organized in Oslo, Norway since 2001. It is organized on a voluntary basis by a group of people from javaBin, the Norwegian Java User Group, working around the year and putting many hours to create an amazing conference experience for you.

Date: September 3-4, 2025
Location: Lillestrøm, Norway
Event Type: In Person

https://2025.javazone.no/en

Sessions

Session: Building secure AI agents with Quarkus LangChain4j
Speaker(s): Willem Jan Glerum
Abstract: In this hands-on workshop, participants will learn how to create and secure AI agents leveraging Quarkus LangChain4j. As AI agents are used more and more within enterprise applications, securing them has become a critical concern. You for example don't want your agent to drop your database or execute privileged actions on your API or leak your sensitive customer data by accident.

Workshop participants will:

• Set up a Quarkus project with LangChain4j extension
• Build a basic AI agent that can interact with business applications
• Implement security measures to prevent prompt injection attacks
• Configure authentication and authorization for AI agent actions
• Structure the application for maintainability and security
• Add appropriate monitoring and audit logging

Each participant should bring their own laptop with Java, Maven, Ollama and Podman installed. The workshop will include step-by-step instructions, code examples, and exercises to reinforce learning.

This workshop is suitable for developers new to AI and more experienced engineers who want to learn how to include and secure AI agents in their projects. Some basic knowledge of Java and Quarkus is helpful but not required.

Session: Local Development in the AI Era
Speaker(s): Kevin Dubois
Abstract: Most of us like to develop on our local machine as much as possible. It means we're in control of any dependencies, network issues/latency, configurations and cost. And let's face it, we love to say that "It works on my machine" don't we?

This way of working has been getting harder as systems become more and more distributed. Now, with the advent of AI-driven development, it has become even more challenging than ever before. Many of us use remote generative AI services to help us with scaffolding, writing and testing code, and with many other tasks.

Wouldn't it be great if we could still run everything on our local machine? That's what this session is all about!

In this session we'll take a look at various solutions to continue to do local, network-optional development:

• Run AI models locally using different tools such as Ollama, Podman AI Lab, Docker, etc.
• Evaluate different code assistants that can work with these locally running models
• Explore how to infuse AI capabilities from local models into our code (e.g. using LangChain4j)
• Compare models from different vendors; and with different sizes to find the right balance between performance and accuracy
• Weigh pros and cons of using local vs remote models

Come to this session to learn more about local development while leveraging AI to optimize our development flow, code and our functionality itself!

Session: Non-deterministic? No problem! You can deal with it!
Speaker(s): Eric Deandrea & Oleg Šelajev
Abstract: Testing is hard, which is why developers tend to avoid it. Testing non-deterministic things is even harder, which is unfortunate, since we're all writing AI-infused applications, and AI models are notoriously non-deterministic. What happens when the applications start using advanced features, such as RAG, tools, and agents? How do you test these applications? There must be some tools, technologies, and practices out there that can help, while not costing your organization lots of money!

Join Java Champions Oleg & Eric in this session as they explore some of these tools & technologies, such as Testcontainers, LangChain4j, Quarkus, and Ollama. They'll bring together Oleg's Testcontainers knowledge and Eric's testing obsessions, getting hands-on and show how you can incorporate these tools and technologies into your inner and outer loop processes.

You'll see how effortlessly Quarkus integrates with Testcontainers, and how Testcontainers can be used in conjunction with popular LLMs when writing tests. You'll also learn about how to use containers to extend your testing into your CI environments, so you can always be sure that if your tests are green you're good to go!

Session: Boost Developer Productivity and Experience: A Deep Dive into Quarkus
Speaker(s): Daniel Oh
Abstract: Join us for a live, hands-on demonstration of Quarkus, the revolutionary Java framework designed to supercharge your development experience.

In this interactive session, you'll witness firsthand how Quarkus can dramatically improve your productivity as a Java developer. Daniel will delve into the core features of Quarkus, demonstrating how tools like live coding, test automation, zero-config Testcontainers, native compilation, and more can streamline development workflows. We'll explore how these features can accelerate the development of modern Java applications, from Jakarta REST services to complex data transactions, security, cloud deployment, virtual threads, and AI integration.

Whether you're a seasoned Java developer or just starting, this session will provide valuable insights into how Quarkus can transform your development process. Take advantage of this opportunity to learn from experts and see the power of Quarkus in action.