#langchain4j — Public Fediverse posts

Policy-aware moderation works best when the policy travels with the request.

I built Shieldstral into a Quarkus LangChain4j service as scored input and output guardrails. The tutorial covers the one-token classifier contract, vLLM with Podman, fail-closed outages, deterministic HTTP stubs, and real-model threshold calibration.

https://www.the-main-thread.com/p/shieldstral-quarkus-langchain4j-guardrails

#Quarkus #LangChain4j #AIGuardrails #MistralAI

#AI can query your DB—but can it do it correctly? That’s the hard part. @MarcoBelladelli shows how #Hibernate + #Quarkus + #LangChain4j add validation & control back. Want fewer production surprises?

Dive in: https://javapro.io/2026/04/03/talk-to-your-data-natural-language-data-access-in-java/

#LLM #Java @Hibernate @QuarkusIO @langchain4j

Our next #JCON2026 session is live: 'Talk to Your Data: Natural Language Data Access in #Java with #Hibernate #Quarkus and LangChain4j' with Marco Melladelli

Explore how Hibernate ORM, Quarkus, and #LangChain4j come together to enable …

Grab your coffee and hit play: https://youtu.be/tMW5jxX6DoA

Helidon 4.4.0 Introduces Alignment with OpenJDK Cadence and Support via Java Verified Portfolio

#framework #helidon #java #langchain4j #microservices

https://www.infoq.com/news/2026/04/helidon-4-4-released/

Oracle has released #Helidon 4.4.0, bringing some major shifts to the framework:

• Now aligned with the OpenJDK release cadence
• Backed by the Java Verified Portfolio
• New agentic AI support via LangChain4j
• Packed with enhanced core capabilities

Dive into the full update here: https://bit.ly/4eaZGuS

#Java #OpenJDK #LangChain4j #InfoQ

It still amazes me how easy & fast it is to create #MCP servers in #Java with #jbang, #langchain4j and a custom skill inside #geminicli

A handful of prompts, and less than 5 minutes later, I had created a working #Wikipedia MCP server!

https://glaforge.dev/posts/2026/04/02/creating-a-wikipedia-mcp-server-in-java-in-a-few-prompts/

Psst… your forms could talk. They could remember. Validate. Help. Loïc Magnette shows how to give forms a brain using #LangChain4j + #Quarkus. It’s not a dream. It’s a pattern.

Learn it now: https://javapro.io/2025/04/15/ai-powered-form-wizards-chat-click-done/

#AIUX #ConversationalUI #JAVAPRO #Java

Oracle #GenAI models are now available in #LangChain4j. It's a small contribution from Helidon team to enable powerful #Oracle #AI platform in Java landscape and in #Helidon too 😎

https://medium.com/helidon/announcement-adding-oci-generative-ai-support-to-langchain4j-and-helidon-a0ac550579a2

RAG, memory, multimodality... in a form? Yep. Loïc Magnette built a talking form that can read files, validate data, and reply like a human.
This isn’t a demo - it’s a dev-ready guide.

Dive in: https://javapro.io/2025/04/15/ai-powered-form-wizards-chat-click-done/

#LangChain4j #Quarkus #AIUX #JAVAPRO #Java @langchain4j

Build a #chatbot that can take your #coffee order!

On May 12, Marta Tolosa & Sydney Nurse (both specialists at #Oracle) will guide a hands-on #AI workshop:
🔸Build with #Helidon & #LangChain4J
🔸Deploy a working #Java-based assistant

🎟️ Just €19: https://2025.europe.jcon.one/tickets
#WorkshopDay #GenAI #JCON2025

Want to go beyond #GenAI buzzwords? Build a real Java-based chat assistant in just 2 hours with Oracle experts Marta Tolosa & Sydney Nurse. Real code. Real use cases.

Read more via JAVAPRO: https://javapro.io/2025/04/30/gen-ai-with-java-build-an-intelligent-chat-assistant-in-just-two-hours/

#JCON2025 #LLM #Helidon #LangChain4J #CloudNative

Excited for #JCON EUROPE 2025? See Marta Tolosa & Sydney Nurse at #JCON2025 in Cologne talking about 'Build an AI-Powered Application with #Helidon and #LangChain4J'

In this #workshop, you will build an #AI powered chat assistant for a #coffee shop using …

Get your free #JUG Ticket: www.jcon.one

Forget next-gen #UX. This is next-human UX. Loïc Magnette turns boring forms into helpful convos - with validation, memory, even file upload.
Your form, but smarter.

Try the blueprint: https://javapro.io/2025/04/15/ai-powered-form-wizards-chat-click-done/

#LangChain4j #Quarkus #AIUX #ConversationalUI #Java

Why should users adapt to your form… when the form can adapt to them? #AI flips the #UX script. Loïc Magnette shares how with memory, validation & RAG, forms become assistants.

Read it here: https://javapro.io/2025/04/15/ai-powered-form-wizards-chat-click-done/

#LangChain4j #Quarkus #AIUX #ConversationalUI #Java @langchain4j

Do you want to know how easy it is to build #AI powered applications using #Helidon and #LangChain4J? Don't forget to visit our session on #JavaOne!

https://reg.rf.oracle.com/flow/oracle/javaone25/catalog/page/catalog/session/1734125338464001XvkM

🚀 Join us on Tue, 24.09.2024 at 18:15h as we dive into the world of AI and LLMs with Lize Raes from https://Naboo.ai. Explore the impact of AI on Java, upcoming developments, and ways to incorporate AI into your projects for a positive influence on society. Let's shape the future of development together!

Register here https://www.jug.ch/html/events/2024/coding_tomorrow.html

🌍💻 #AI #LLM #Java #SoftwareDevelopment #CommunityRocks #LangChain4j #FOSS #TechCommunity #jugch''