fix(health): evict deleted sites from the aggregator on the periodic site refresh

2026-07-08 16:27:38 -04:00
parent 87c7255912
commit d962c77bb7
7 changed files with 99 additions and 3 deletions
@@ -39,4 +39,16 @@ public interface ICentralHealthAggregator
    /// <param name="siteId">The string identifier of the site to look up.</param>
    /// <returns>The <see cref="SiteHealthState"/> for the site, or null if not yet seen.</returns>
    SiteHealthState? GetSiteState(string siteId);
+
+    /// <summary>
+    /// Removes tracked sites not in <paramref name="knownSiteIds"/> (i.e. deleted
+    /// from configuration). The synthetic central id is always retained.
+    /// Self-healing: called from the CentralCommunicationActor's periodic site
+    /// refresh, so a deleted site disappears within one refresh interval without
+    /// needing a dedicated deletion event. Without this the in-memory state only
+    /// ever grew, leaving a deleted site as a permanently-offline dashboard tile
+    /// (and a live KPI sample source) forever.
+    /// </summary>
+    /// <param name="knownSiteIds">The identifiers of all currently-configured sites.</param>
+    void PruneUnknownSites(IReadOnlyCollection<string> knownSiteIds);
 }