Java Architecture Diary

Aug 14, 2026 · Artificial Intelligence

Use JVM Native Vector API to Remove an External Vector Store in RAG

This guide shows how to replace external vector databases like Milvus or Qdrant with the JVM’s incubating Vector API and the integrallis/vectors library, providing built‑in distance kernels, indexing (FLAT, HNSW, IVF), and persistence, and demonstrates integration with Spring AI and LangChain4j through concise code examples and required JVM flags.