Optimize graph relation filtering and fix concurrent connection storms

nvim-core/src/lib.rs

@@ -126,12 +126,10 @@ pub struct NvimRequest {
 static NVIM_CONN: LazyLock<Arc<Mutex<Option<mpsc::Sender<NvimRequest>>>>> = LazyLock::new(|| Arc::new(Mutex::new(None)));
 
 async fn get_nvim_connection() -> Result<mpsc::Sender<NvimRequest>, String> {
-    {
-        let conn_lock = NVIM_CONN.lock().await;
-        if let Some(sender) = conn_lock.as_ref() {
-            if !sender.is_closed() {
-                return Ok(sender.clone());
-            }
+    let mut conn_lock = NVIM_CONN.lock().await;
+    if let Some(sender) = conn_lock.as_ref() {
+        if !sender.is_closed() {
+            return Ok(sender.clone());
         }
     }
 
@@ -243,7 +241,6 @@ async fn get_nvim_connection() -> Result<mpsc::Sender<NvimRequest>, String> {
         }
     });
 
-    let mut conn_lock = NVIM_CONN.lock().await;
     *conn_lock = Some(tx.clone());
     Ok(tx)
 }
@@ -1004,7 +1001,6 @@ fn init_logging(app_name: &str) -> tracing_appender::non_blocking::WorkerGuard {
 mod tests {
     use super::*;
     use tokio::io::BufReader;
-    use tokio::io::AsyncReadExt;
 
     #[test]
     fn test_rmpv_to_json_primitives() {

server/src/handlers.rs

@@ -511,19 +511,8 @@ impl MemoryHandler {
                     "delete_relations" => {
                         let req = parse_tool!(args.clone(), id, DeleteRelationsTool);
                         self.state.modify_graph(|master| {
-                            let mut to_rem = HashSet::new();
-                            for r in req.relations {
-                                to_rem.insert(format!(
-                                    "{}|{}|{}|{}",
-                                    r.from, r.to, r.relation_type, r.namespace
-                                ));
-                            }
-                            master.relations.retain(|r| {
-                                !to_rem.contains(&format!(
-                                    "{}|{}|{}|{}",
-                                    r.from, r.to, r.relation_type, r.namespace
-                                ))
-                            });
+                            let to_rem: HashSet<_> = req.relations.into_iter().collect();
+                            master.relations.retain(|r| !to_rem.contains(r));
                         });
                         Ok("Relations deleted".to_string())
                     }