Files
Oleksandr Bezdieniezhnykh ff790bd639
ci/woodpecker/push/build-arm Pipeline failed
[AZ-675] telemetry_stream Tonic gRPC server + per-client lossy queue
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>
2026-05-20 12:44:39 +03:00

20 lines
698 B
Rust

//! Build-time codegen for the AZ-675 telemetry gRPC contract.
//!
//! We use `protoc-bin-vendored` so the build is self-contained — no
//! system protoc install is required on dev or CI. The PROTOC env
//! var is set before invoking `tonic-prost-build`, which is what
//! tonic uses to locate the compiler.
fn main() -> Result<(), Box<dyn std::error::Error>> {
let protoc = protoc_bin_vendored::protoc_bin_path()?;
std::env::set_var("PROTOC", protoc);
tonic_prost_build::configure()
.build_client(true)
.build_server(true)
.compile_protos(&["proto/telemetry.proto"], &["proto"])?;
println!("cargo:rerun-if-changed=proto/telemetry.proto");
Ok(())
}