Implement periodic ping frames in WebSocket server for keepalive and update overproduction handling in ProduceWorker to include branch_id. This enhances connection stability and improves notification clarity for overproduction events.

src/websocket_server.rs

@@ -15,6 +15,7 @@ use tokio::io::{AsyncRead, AsyncWrite};
 use tokio::net::TcpListener;
 use tokio::runtime::{Builder, Runtime};
 use tokio::sync::{broadcast, mpsc, Mutex};
+use tokio::time::{interval, Duration as TokioDuration};
 use tokio_rustls::rustls::{self, ServerConfig};
 use tokio_rustls::TlsAcceptor;
 use tokio_tungstenite::tungstenite::Message;
@@ -473,8 +474,12 @@ async fn handle_connection<S>(
         }
     };
 
-    // Broker-Nachrichten an den Client
+    // Broker-Nachrichten an den Client + periodische Ping-Frames als Keepalive
     let outgoing = async move {
+        // Regelmäßiges Ping, um inaktiven Verbindungen ein Lebenszeichen zu senden
+        // und Timeouts auf dem Weg (Proxy/Loadbalancer) zu vermeiden.
+        let mut ping_interval = interval(TokioDuration::from_secs(240));
+
         loop {
             tokio::select! {
                 // Nachrichten aus dem MessageBroker
@@ -551,6 +556,16 @@ async fn handle_connection<S>(
                         }
                     }
                 }
+                // Periodisches Ping an den Client
+                _ = ping_interval.tick() => {
+                    if let Err(e) = ws_sender.send(Message::Ping(Vec::new())).await {
+                        eprintln!(
+                            "[WebSocketServer] Fehler beim Senden von Ping an {}: {}",
+                            peer_addr, e
+                        );
+                        break;
+                    }
+                }
             }
         }
     };