Ep47: Langchain4j GraphRAG Friction + MCP Authorization Headaches

Breaktime Tech Talks

In this episode, I share some hands-on insights from building apps with Langchain4j using Quarkus and Neo4j, and compare it with Spring AI—especially around how each framework handles vector search and GraphRAG workflows. Spoiler: customization in Langchain4j feels a bit clunky.

I also dig into one article's critical take on the MCP authorization spec and why its current approach to security is misaligned with how enterprises actually structure identity and access. The article I discuss breaks down both the architectural intentions and the practical enterprise concerns—token handling, overhead, and developer friction.

If you’re working at the intersection of GenAI infrastructure and enterprise systems, this one’s for you.