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feat(consumer): Add metrics for partitions assigned and revoked #497

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Merged
lvthanh03 merged 2 commits into from
Oct 9, 2025
Merged

feat(consumer): Add metrics for partitions assigned and revoked #497

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33500e5
feat(consumer): Add metrics for partitions assigned and revoked
lvthanh03 Oct 8, 2025
576b4bb
Use gauge sets
lvthanh03 Oct 8, 2025
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8 changes: 8 additions & 0 deletions src/kafka/consumer.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ pub async fn start_consumer(

handle_shutdown_signals(event_sender.clone());
poll_consumer_client(consumer.clone(), client_shutdown_receiver);
metrics::gauge!("arroyo.consumer.current_partitions").set(0);
handle_events(
consumer,
event_receiver,
Expand Down Expand Up @@ -148,6 +149,8 @@ impl ConsumerContext for KafkaContext {
info!("Partition assignment event sent, waiting for rendezvous...");
let _ = rendezvous_receiver.recv();
info!("Rendezvous complete");
metrics::counter!("arroyo.consumer.partitions_assigned.count")
.increment(tpl.count() as u64);
}
Rebalance::Revoke(tpl) => {
debug!("Got pre-rebalance callback, kind: Revoke");
Expand All @@ -165,6 +168,8 @@ impl ConsumerContext for KafkaContext {
info!("Partition revocation event sent, waiting for rendezvous...");
let _ = rendezvous_receiver.recv();
info!("Rendezvous complete");
metrics::counter!("arroyo.consumer.partitions_revoked.count")
.increment(tpl.count() as u64);
}
Rebalance::Error(err) => {
debug!("Got pre-rebalance callback, kind: Error");
Expand Down Expand Up @@ -366,6 +371,7 @@ pub async fn handle_events(
info!("Received event: {:?}", event);
state = match (state, event) {
(ConsumerState::Ready, Event::Assign(tpl)) => {
metrics::gauge!("arroyo.consumer.current_partitions").set(tpl.len() as f64);
ConsumerState::Consuming(spawn_actors(consumer.clone(), &tpl), tpl)
}
(ConsumerState::Ready, Event::Revoke(_)) => {
Expand All @@ -381,12 +387,14 @@ pub async fn handle_events(
"Revoked TPL should be equal to the subset of TPL we're consuming from"
);
handles.shutdown(CALLBACK_DURATION).await;
metrics::gauge!("arroyo.consumer.current_partitions").set(0);
ConsumerState::Ready
}
(ConsumerState::Consuming(handles, _), Event::Shutdown) => {
handles.shutdown(CALLBACK_DURATION).await;
debug!("Signaling shutdown to client...");
shutdown_client.take();
metrics::gauge!("arroyo.consumer.current_partitions").set(0);
ConsumerState::Stopped
}
(ConsumerState::Stopped, _) => {
Expand Down
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