do not discover while printing

Inspectron.Epson/Queue/PrinterQueue.cs

@@ -15,11 +15,12 @@ public class PrinterQueue
     private Task _processingTask;
     private readonly IPrintService _printService;
     private readonly ILogger _logger;
+    private readonly PrintServer _printServer;
 
     public bool IsProcessing { get; private set; }
     public int QueueLength => _queue.Count + _priorityQueue.Count;
 
-    public PrinterQueue(string printerIp, IPrintService printService, ILogger logger)
+    public PrinterQueue(string printerIp, IPrintService printService, ILogger logger, PrintServer printServer)
     {
         PrinterIp = printerIp;
         _queue = new ConcurrentQueue<PrintJob>();
@@ -28,6 +29,7 @@ public class PrinterQueue
         _cancellationTokenSource = new CancellationTokenSource();
         _printService = printService;
         _logger = logger;
+        _printServer = printServer;
     }
 
     public void Enqueue(PrintJob job)
@@ -70,6 +72,7 @@ public class PrinterQueue
                 {
                     _logger.LogInformation("Processing job on printer {PrinterId}", PrinterIp);
 
+                    _printServer.EnterPrintLock();
                     try
                     {
                         // Call the actual print function
@@ -100,6 +103,10 @@ public class PrinterQueue
                         _logger.LogError(ex, "Error processing job");
                         // Handle exception (retry, log, etc.)
                     }
+                    finally
+                    {
+                        _printServer.ExitPrintLock();
+                    }
                 }
             }
             catch (OperationCanceledException)