Scalable Topics: `pulsar::st` producer — per-segment fan-out, key routing, MessageId - #601

Merged

merlimat merged 11 commits into

apache:mainfrom

merlimat:scalable-topics-producer

Jul 16, 2026

Commits on Jul 9, 2026

st: teach the classic client the segment:// topic domain
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2b6226b
st: MessageId implementation - segment-qualified ids
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82ecb87
st: thread assignedBrokerUrl to per-segment producers (broker pinning)
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34fccee
st: producer seam — ProducerImplBase + ProducerCore forwarders
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775149d
st: StProducerImpl — per-segment producer fan-out (slice 3)
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6e46a71
st: broker-free StProducerImpl unit tests
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3b8e8de
st: take send-path Promise by const-ref (clang-tidy performance)
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01af94f

Commits on Jul 10, 2026

st: clang-format the producer changes for clang-format-11
merlimat
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b8f9d7a

Commits on Jul 13, 2026

Commits on Jul 14, 2026

st: address review — TLS broker address and weak retry-timer capture
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9e40bba