fix: mark parallel actions as failed on restart

uplink/src/base/bridge/actions_lane.rs

@@ -43,6 +43,8 @@ pub enum Error {
     FailedCancellation,
     #[error("Action cancelled by action_id: {0}")]
     Cancelled(String),
+    #[error("Uplink restarted before action response")]
+    Restart,
 }
 
 pub struct ActionsBridge {
@@ -232,6 +234,14 @@ impl ActionsBridge {
                     if let Err(e) = self.save_current_action() {
                         error!("Failed to save current action: {e}");
                     }
+
+                    // NOTE: marks parallel actions still in execution as failed
+                    // (serializer will persist on disk even if network is down)
+                    let parallel_actions: Vec<String> = self.parallel_actions.drain().collect();
+                    for action_id in parallel_actions {
+                        self.forward_action_error(&action_id, Error::Restart).await
+                    }
+
                     // NOTE: there might be events still waiting for recv on bridge_rx
                     self.shutdown_handle.send(()).unwrap();
 

uplink/src/base/serializer/mod.rs

@@ -140,12 +140,15 @@ struct StorageHandler {
 impl StorageHandler {
     fn new(config: Arc<Config>) -> Result<Self, Error> {
         let mut map = BTreeMap::new();
-        for (stream_name, stream_config) in config.streams.iter() {
+        let mut streams = config.streams.clone();
+        // NOTE: persist action_status if not configured otherwise
+        streams.insert("action_status".into(), config.action_status.clone());
+        for (stream_name, stream_config) in streams {
             let mut storage =
                 Storage::new(&stream_config.topic, stream_config.persistence.max_file_size);
             if stream_config.persistence.max_file_count > 0 {
                 let mut path = config.persistence_path.clone();
-                path.push(stream_name);
+                path.push(&stream_name);
 
                 std::fs::create_dir_all(&path).map_err(|_| {
                     Error::Persistence(config.persistence_path.to_string_lossy().to_string())

uplink/src/main.rs

@@ -48,6 +48,7 @@ const DEFAULT_CONFIG: &str = r#"
     topic = "/tenants/{tenant_id}/devices/{device_id}/action/status"
     batch_size = 1
     flush_period = 2
+    persistence = { max_file_count = 1 } # Ensures action responses are not lost on restarts
     priority = 255 # highest priority for quick delivery of action status info to platform
 
     [streams.device_shadow]