From 02af59c37e5b446802a646433a6c1e90fe50bf07 Mon Sep 17 00:00:00 2001
From: SikongJueluo <selfconfusion@gmail.com>
Date: Wed, 20 Aug 2025 17:20:52 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E7=A4=BA=E6=B3=A2?=
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---
 server/src/Hubs/DigitalTubesHub.cs | 2 +-
 server/src/Hubs/OscilloscopeHub.cs | 6 ++----
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/server/src/Hubs/DigitalTubesHub.cs b/server/src/Hubs/DigitalTubesHub.cs
index 999d9b7..4eb879f 100644
--- a/server/src/Hubs/DigitalTubesHub.cs
+++ b/server/src/Hubs/DigitalTubesHub.cs
@@ -70,7 +70,7 @@ public class DigitalTubesHub : Hub<IDigitalTubesReceiver>, IDigitalTubesHub
     private readonly IHubContext<DigitalTubesHub, IDigitalTubesReceiver> _hubContext;
     private readonly Database.UserManager _userManager = new();
 
-    private ConcurrentDictionary<string, DigitalTubesScanTaskInfo> _scanTasks = new();
+    private static ConcurrentDictionary<string, DigitalTubesScanTaskInfo> _scanTasks = new();
 
     public DigitalTubesHub(IHubContext<DigitalTubesHub, IDigitalTubesReceiver> hubContext)
     {
diff --git a/server/src/Hubs/OscilloscopeHub.cs b/server/src/Hubs/OscilloscopeHub.cs
index fffd71e..ecf908f 100644
--- a/server/src/Hubs/OscilloscopeHub.cs
+++ b/server/src/Hubs/OscilloscopeHub.cs
@@ -86,7 +86,7 @@ public class OscilloscopeHub : Hub<IOscilloscopeReceiver>, IOscilloscopeHub
     private readonly IHubContext<OscilloscopeHub, IOscilloscopeReceiver> _hubContext;
     private readonly Database.UserManager _userManager = new();
 
-    private ConcurrentDictionary<string, OscilloscopeScanTaskInfo> _scanTasks = new();
+    private static ConcurrentDictionary<string, OscilloscopeScanTaskInfo> _scanTasks = new();
 
     public OscilloscopeHub(IHubContext<OscilloscopeHub, IOscilloscopeReceiver> hubContext)
     {
@@ -192,9 +192,7 @@ public class OscilloscopeHub : Hub<IOscilloscopeReceiver>, IOscilloscopeHub
             var scanTaskInfo = new OscilloscopeScanTaskInfo(client);
             scanTaskInfo.ScanTask = ScanTask(scanTaskInfo, Context.ConnectionId);
 
-            _scanTasks[key] = scanTaskInfo;
-
-            return result.Value;
+            return _scanTasks.TryAdd(key, scanTaskInfo);
         }
         catch (Exception ex)
         {