fix(notify): keep live listen events active when disabled (#2952)

Co-authored-by: houseme <housemecn@gmail.com>

rustfs/src/server/event.rs

@@ -107,9 +107,21 @@ pub async fn init_event_notifier() {
     if !enabled {
         info!(
             target: "rustfs::main::init_event_notifier",
-            "Notify module is disabled, event notifier initialization is skipped. Set {}=true to enable notify initialization.",
+            "Notify module is disabled, initializing live event stream support only. Set {}=true to enable notification targets.",
             rustfs_config::ENV_NOTIFY_ENABLE
         );
+        if rustfs_notify::notification_system().is_none() {
+            match rustfs_notify::initialize_live_events() {
+                Ok(()) => {
+                    install_ecstore_event_dispatch_hook();
+                    info!(
+                        target: "rustfs::main::init_event_notifier",
+                        "Live event stream support initialized successfully."
+                    );
+                }
+                Err(e) => error!("Failed to initialize live event stream support: {}", e),
+            }
+        }
         return;
     }
 

rustfs/src/storage/helper.rs

@@ -90,7 +90,7 @@ impl OperationHelper {
     /// Create a new OperationHelper for S3 requests.
     pub fn new(req: &S3Request<impl Send + Sync>, event: EventName, op: S3Operation) -> Self {
         let audit_enabled = is_audit_module_enabled();
-        let notify_enabled = is_notify_module_enabled();
+        let notify_enabled = should_build_notification_event(is_notify_module_enabled());
 
         let path = req.uri.path().trim_start_matches('/');
         let mut segs = path.splitn(2, '/');
@@ -334,6 +334,10 @@ impl OperationHelper {
     }
 }
 
+fn should_build_notification_event(notify_module_enabled: bool) -> bool {
+    notify_module_enabled || rustfs_notify::notification_system().is_some_and(|system| system.has_live_listeners())
+}
+
 impl Drop for OperationHelper {
     fn drop(&mut self) {
         let Self::Enabled(state) = self else {