Crafting Intelligent Applications with Quarkus/LangChain4j
summary
Quarkus integrates LangChain4j as a framework extension that turns chains, embeddings, vector stores and tool-calling into CDI beans with build-time optimizations and native-image support; the team prototypes an extension in a single afternoon and shows an Alpha the next morning. Demos run in Quarkus DevMode and include image generation (OpenAI DALL·E) and captioning (GPT‑4o), a RAG chatbot using embeddings + vector DB retrieval, and function-calling tools that cancel bookings via JDBC-like beans with guardrails implemented as an AI Service for prompt‑injection detection.
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chapters (9)
- 0:00Introduction
- 1:50LLMs and AI infused apps
- 13:12Why Quarkus for AI
- 16:21Demo image generation
- 21:36RAG pattern explained
- 25:52Demo RAG chatbot
- 34:00Function calling demo
- 40:19Guardrails and security
- 41:44Observability and conclusion
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