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envoyproxy
flow control: side stream flow control part 1
Description: This PR implements flow control (part 1) : side stream applies back pressure to downstream. It hooks up the watermark callbacks and registration in envoy-gRPC. When it is above buffer watermark, the high watermark callback will fire; watermark event will be populated and eventually inform the downstream (data source) stop sending the data.
Tests: Envoy-gRPC test: Verifies that expected high/low watermark callbacks are triggered when large request is sent. ext_proc test: Verifies that expected flow control stats are triggered (by watermark callbacks and events) when large request is sent.
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Caused by: https://github.com/envoyproxy/envoy/pull/34769 was opened by tyxia.
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CC @envoyproxy/runtime-guard-changes: FYI only for changes made to (source/common/runtime/runtime_features.cc).
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Caused by: https://github.com/envoyproxy/envoy/pull/34769 was synchronize by tyxia.
adding cross-company reviewer for at least the first PR in the series - I'll assume LGTM here is LGTM for the four-fold flow control integration unless otherwise specified.
