GeeCon 2024

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Event Description: Java and JVM based technologies, dynamic languages, enterprise architectures, patterns, distributed computing, software craftsmanship, AI and much more...

Date: May 15-17, 2024
Location: Kraków, Poland
Event Type: In Person

https://2024.geecon.org/

Thursday, May 16th

Virtual threads - no pain, no gain
Speaker(s): Martin Stefanko
Day/Time: Thursday, May 16 | 14:10-15:00 | Room 1
Abstract: Project Loom, or virtual threads, promised fast, lightweight user-space threads that are very cheap to block. While this is true, everything in life comes at a price. However, virtual threads allow users to not care about it. It is the job of the underlying libraries that all our applications use. Issues that can still occur with virtual threads, such as pinning, monopolization, or large thread-local objects, still present real-world problems many libraries still need to account for. In this session, we explain the virtual thread model execution and compare it to the event loop/reactive model utilized in Quarkus. We will also dive into individual problems that virtual threads might encounter and demonstrate how you can verify that your code doesn’t run into them. By the end of the talk, you’ll understand these (from the user point of view invisible) issues that often manifest only under high loads.

Quarkus meets AI: Developing AI applications in Java with Quarkus and Langchain4j
Speaker(s): Jan Martiška
Day/Time: Thursday, May 16 | 16:30-17:20 | Room 10
Abstract: In this practical session, I will demonstrate how Quarkus, the cloud-native Java development framework, and its Langchain4j extension can be used for working with AI models like GPT and others, including image-generating models, opening the door to endless possibilities. I will show how to use Quarkus to:

• Build a chatbot application that allows you to supply data from your own custom data store and feed it to the AI model, enabling it to answer questions using this data (this technique is called Retrieval Augmented Generation).
• Build a highly autonomous agent by supplying the model with various tools, that means locally implemented functions that the model can decide to execute when necessary (for example, send something via email, or write to a database), and then letting the agent determine the appropriate sequence of steps to accomplish the given high-level goal using these tools.
• Demonstrate the Quarkus goodies that make the development process easier, like the interface for manually chatting with the model directly through the application and for exploring image-generating capabilities of image models.

The development joy of Quarkus with all its goodies and incredible productivity now also extends to creating AI applications. Join me and see for yourself!

Friday, May 17th

Migrate Spring Boot app to Quarkus. Stage unlocked
Speaker(s): Jonathan Vila
Day/Time: Friday, May 17 | 11:20-12:10 | Room 11
Abstract: Have you heard about Quarkus ? for sure you have, a new super fast, super light framework to develop cloud native and GraalVM compatible apps. But, is that easy to go the Quarkus way ? is it hard to migrate an existing app ? For sure in a hello world demo this will look fantastic ( they all look that way don’t they ? ) but, in a real app, is that nice ? is that easy ? is that fun ? In this session I will show my experience from scratch migrating an app to Quarkus, using different technologies as Hibernate, Prometheus, Rest, … and also how you can check your current app and see how easy is to migrate using a foss app to analyse it. Prepare for a journey of reality, failures, and experiences on the universe of Quarkus , at a ludicrous speed.