recompute neighbours whenever topology changes

1 files changed, 3 insertions, 0 deletions

diff --git a/src/state.rs b/src/state.rs
index af01cf0..ee7fa7a 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -632,6 +632,9 @@ pub(crate) struct AppState {
     pub(crate) announce_pending: Arc<std::sync::Mutex<Option<std::collections::HashSet<String>>>>,
     /// Our neighbours, once known (`swarm::topology`).
     pub(crate) neighbours: Arc<std::sync::RwLock<Option<crate::swarm::topology::NeighbourView>>>,
+    /// Something the neighbours are computed from may have changed: the member list or a
+    /// peer's reachability (`swarm::topology::run_worker`).
+    pub(crate) topology_changed: Arc<tokio::sync::Notify>,
 
     /// While rejoining a newer epoch, the previous document, served read-only (and
     /// marked stale) instead of answering 503.