Add rustdoc

stackabletech · Feb 25, 2025 · 373ab07 · 373ab07
1 parent 5c8051e
commit 373ab07
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/trino-lb/src/maintenance/query_count_fetcher.rs b/trino-lb/src/maintenance/query_count_fetcher.rs
@@ -148,6 +148,12 @@ impl QueryCountFetcher {
         }
     }
 
+    /// Update the query counter for the given cluster.
+    ///
+    /// In case the cluster should be reachable, we fetch the current counter and store that.
+    /// In case we know there is no point in fetching the counter (as e.g. the cluster is turned off), we store a query
+    /// count of zero (0) to avoid having dangling clusters with non-zero query counts (when in fact they are not
+    /// executing any query at all).
     #[instrument(skip(self, cluster), fields(cluster_name = cluster.name))]
     async fn process_cluster(&self, cluster: &TrinoClusterConfig, state: ClusterState) {
         match state {