Why it matters

LangChain4j RAG is production-ready. Understanding shapes design.

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The architecture

Ingestion: DocumentSplitter + Embed + Store.

Query: retrieve + augment prompt.

LangChain4j RAG flowIngestsplit + embed + storeRetrievevector searchAugmentinject in promptMultiple EmbeddingStore impls: Pinecone, pgvector, Chroma, Elasticsearch, Weaviate
RAG.
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How it works end to end

DocumentSplitters: character, sentence, recursive.

EmbeddingStores: Pinecone, pgvector, Chroma.

RetrievalAugmentor for advanced.