mirror of
https://github.com/azaion/autopilot.git
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Oleksandr Bezdieniezhnykh
ff790bd639
ci/woodpecker/push/build-arm Pipeline failed
Pins operator-link transport to gRPC server-streaming (closes architecture Q2 in favour of gRPC). Adds first-time tonic / prost / tonic-build infrastructure to the workspace; uses protoc-bin-vendored so neither dev machines nor CI need system protoc installed. Design — back-pressure lives in the per-topic tokio::sync::broadcast ring, drained directly by the tonic-streamed response via BroadcastStream + StreamMap. No intermediate mpsc buffer that could absorb back-pressure invisibly. Slow client overrun -> Lagged(n) event -> per-(client_id, topic) drop counter incremented; healthy clients on the same topic are unaffected. Service surface — Subscribe(SubscribeRequest) -> stream TelemetryMessage; five topics (TelemetrySample, GimbalState, DetectionEvent, MovementCandidate, MapObjectsBundle); empty topics list defaults to subscribe-all; empty client_id rejected; stream drop decrements subscribed_clients via StreamGuard. TelemetrySink push_detections is now real; push_frame still NotImplemented(AZ-676 video path). Tests — 6 unit + 5 integration (AC-1..AC-3 via in-process gRPC client, plus subscribe-all default + empty-client_id rejection). Clippy on telemetry_stream clean. Pre-existing mission_executor ac3 test polling race surfaces more reliably under the new tonic build pressure; documented as _docs/_process_leftovers/2026-05-20_mission_executor_ac3_flake.md and unchanged by this batch. Co-authored-by: Cursor <cursoragent@cursor.com>
65 lines
2.5 KiB
Protocol Buffer
65 lines
2.5 KiB
Protocol Buffer
// AZ-675 telemetry_stream — operator-bound gRPC contract.
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//
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// One service, one bi-directional Subscribe RPC. Client opens a stream
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// declaring which topics it wants; server pushes messages for those
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// topics until the client disconnects.
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//
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// The server enforces per-client back-pressure: when a client cannot
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// keep up the oldest message in *that client's* queue is dropped and
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// a per-(client, topic) drop counter is incremented. Other clients
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// are unaffected.
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//
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// AZ-676 will add the video path (separate RPC, server-streamed binary
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// frames). AZ-677 will add the MapObjectsBundle snapshot RPC. Keep
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// those concerns out of this contract.
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syntax = "proto3";
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package autopilot.telemetry.v1;
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// Topics a client can subscribe to. Repeated in SubscribeRequest so a
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// single stream multiplexes whichever subset the client cares about.
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enum Topic {
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TOPIC_UNSPECIFIED = 0;
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TOPIC_TELEMETRY_SAMPLE = 1;
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TOPIC_GIMBAL_STATE = 2;
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TOPIC_DETECTION_EVENT = 3;
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TOPIC_MOVEMENT_CANDIDATE = 4;
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TOPIC_MAP_OBJECTS_BUNDLE = 5;
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}
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message SubscribeRequest {
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// Operator/client identifier. Plumbed into per-client drop counters
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// and log lines. Free-form for AZ-675; AZ-678 (operator command
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// auth) will tighten the format.
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string client_id = 1;
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repeated Topic topics = 2;
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}
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// Each message carries the topic tag + an opaque JSON payload. We
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// don't pin schemas per topic in proto here because the canonical
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// payload shapes are already authoritative in `crates/shared/models`
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// (TelemetrySample, GimbalState, DetectionEvent, MovementCandidate,
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// MapObjectsBundle). Using JSON keeps the wire honest with what the
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// rest of the system already serializes; if a topic later needs
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// schema enforcement, add a typed message variant in a future bump.
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message TelemetryMessage {
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Topic topic = 1;
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// Monotonic nanoseconds since the autopilot process started. Used
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// by the operator for ordering and latency measurement.
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uint64 monotonic_ts_ns = 2;
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// Server-side per-client sequence number. Strictly increases per
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// (client, topic) stream; gaps imply drops.
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uint64 sequence = 3;
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// Serialized JSON payload (utf-8). Topic determines the shape.
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bytes payload_json = 4;
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}
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service TelemetryStream {
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// Server-streaming subscribe. The client sends ONE SubscribeRequest;
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// the server pushes TelemetryMessage values until the client cancels
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// the stream or the server shuts down. The server applies per-
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// client drop-oldest back-pressure if the client cannot keep up.
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rpc Subscribe(SubscribeRequest) returns (stream TelemetryMessage);
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}
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