Why it matters

Streaming shapes UX. Understanding shapes reactive integration.

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The architecture

StreamingChatLanguageModel.generate with handler.

onNext / onComplete / onError callbacks.

LangChain4j streamingStreaming modelOpenAI / AnthropicToken handleronNext callbackCompleteonComplete callbackReactive bridge for Flux / Publisher; integrate with WebFlux for SSE
Streaming.
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How it works end to end

Callback-based handler.

Reactor bridge for Flux.

Error handling required.