fresh-borzoni commented on code in PR #407:
URL: https://github.com/apache/fluss-rust/pull/407#discussion_r2917858392
##########
crates/fluss/src/rpc/server_connection.rs:
##########
@@ -217,6 +218,89 @@ struct ActiveRequest {
channel: Sender<Result<Response, RpcError>>,
}
+/// Tracks per-request connection metrics and ensures in-flight gauge cleanup
on drop.
+struct RequestMetricsLifecycle {
+ label: Option<&'static str>,
+ start: Instant,
+ completed: bool,
+}
+
+impl RequestMetricsLifecycle {
+ fn begin(api_key: crate::rpc::ApiKey, request_bytes: u64) -> Self {
+ let label = crate::metrics::api_key_label(api_key);
+ if let Some(label) = label {
+ // Match Java semantics: count request attempts before write/send.
+ metrics::counter!(
+ crate::metrics::CLIENT_REQUESTS_TOTAL,
+ crate::metrics::LABEL_API_KEY => label
+ )
+ .increment(1);
+ metrics::counter!(
+ crate::metrics::CLIENT_BYTES_SENT_TOTAL,
+ crate::metrics::LABEL_API_KEY => label
+ )
+ .increment(request_bytes);
+ metrics::gauge!(
+ crate::metrics::CLIENT_REQUESTS_IN_FLIGHT,
+ crate::metrics::LABEL_API_KEY => label
+ )
+ .increment(1.0);
+ }
+ Self {
+ label,
+ start: Instant::now(),
+ completed: false,
+ }
Review Comment:
@charlesdong1991 not a big deal, we may ignore
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