Merge pull request #1026 from softworkz/submit_disposed_exceptions

SocketIoFacade: Improve disposal, avoid exception on tear-down

src/ElectronNET.API/API/App.cs

@@ -427,7 +427,7 @@ namespace ElectronNET.API
 
         public void DisposeSocket()
         {
-            BridgeConnector.Socket.DisposeSocket();
+            BridgeConnector.Socket.Dispose();
         }
 
         /// <summary>

src/ElectronNET.API/Bridge/SocketIOFacade.cs

@@ -8,10 +8,11 @@ using ElectronNET.API.Serialization;
 using SocketIO.Serializer.SystemTextJson;
 using SocketIO = SocketIOClient.SocketIO;
 
-internal class SocketIoFacade
+internal class SocketIoFacade : IDisposable
 {
     private readonly SocketIO _socket;
     private readonly object _lockObj = new object();
+    private bool _isDisposed;
 
     public SocketIoFacade(string uri)
     {
@@ -27,6 +28,8 @@ internal class SocketIoFacade
 
     public void Connect()
     {
+        this.CheckDisposed();
+
         _socket.OnError += (sender, e) => { Console.WriteLine($"BridgeConnector Error: {sender} {e}"); };
 
         _socket.OnConnected += (_, _) =>
@@ -46,6 +49,8 @@ internal class SocketIoFacade
 
     public void On(string eventName, Action action)
     {
+        this.CheckDisposed();
+
         lock (_lockObj)
         {
             _socket.On(eventName, _ => { Task.Run(action); });
@@ -54,6 +59,8 @@ internal class SocketIoFacade
 
     public void On<T>(string eventName, Action<T> action)
     {
+        this.CheckDisposed();
+
         lock (_lockObj)
         {
             _socket.On(eventName, response =>
@@ -66,6 +73,8 @@ internal class SocketIoFacade
 
     public void Once(string eventName, Action action)
     {
+        this.CheckDisposed();
+
         lock (_lockObj)
         {
             _socket.On(eventName, _ =>
@@ -78,6 +87,8 @@ internal class SocketIoFacade
 
     public void Once<T>(string eventName, Action<T> action)
     {
+        this.CheckDisposed();
+
         lock (_lockObj)
         {
             _socket.On(eventName, (socketIoResponse) =>
@@ -90,6 +101,11 @@ internal class SocketIoFacade
 
     public void Off(string eventName)
     {
+        if (_isDisposed)
+        {
+            return;
+        }
+
         lock (_lockObj)
         {
             _socket.Off(eventName);
@@ -98,11 +114,33 @@ internal class SocketIoFacade
 
     public async Task Emit(string eventName, params object[] args)
     {
-        await _socket.EmitAsync(eventName, args).ConfigureAwait(false);
+        if (!_isDisposed)
+        {
+            await _socket.EmitAsync(eventName, args).ConfigureAwait(false);
+        }
     }
 
-    public void DisposeSocket()
+    /// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
+    public void Dispose()
     {
-        _socket.Dispose();
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            _isDisposed = true;
+            _socket.Dispose();
+        }
+    }
+
+    private void CheckDisposed()
+    {
+        if (this._isDisposed)
+        {
+            throw new ObjectDisposedException(nameof(SocketIoFacade));
+        }
     }
 }

src/ElectronNET.API/Runtime/Services/SocketBridge/SocketBridgeService.cs

@@ -33,7 +33,7 @@
 
         protected override Task StopCore()
         {
-            this.socket.DisposeSocket();
+            this.socket.Dispose();
             return Task.CompletedTask;
         }
 

src/ElectronNET.IntegrationTests/Tests/BrowserWindowTests.cs

@@ -266,9 +266,11 @@ namespace ElectronNET.IntegrationTests.Tests
             try
             {
                 window = await Electron.WindowManager.CreateWindowAsync(
-                    new BrowserWindowOptions { Show = false, Width = 300, Height = 200 },
+                    new BrowserWindowOptions { Show = true, Width = 300, Height = 200 },
                     "about:blank");
 
+                await Task.Delay(5.seconds());
+
                 var tcs = new TaskCompletionSource<Rectangle>(TaskCreationOptions.RunContinuationsAsynchronously);
                 window.OnBoundsChanged += bounds => tcs.TrySetResult(bounds);
 

src/ElectronNET.IntegrationTests/Tests/WebContentsTests.cs

@@ -174,13 +174,15 @@ namespace ElectronNET.IntegrationTests.Tests
 
             try
             {
+                await Task.Delay(1.seconds());
+
                 window = await Electron.WindowManager.CreateWindowAsync(new BrowserWindowOptions { Show = true }, "about:blank");
 
-                await Task.Delay(3.seconds());
+                await Task.Delay(5.seconds());
 
                 window.WebContents.SetUserAgent("MyUserAgent/1.0");
 
-                await Task.Delay(1.seconds());
+                await Task.Delay(2.seconds());
 
                 var ok = await window.WebContents.GetUserAgentAsync();
                 ok.Should().Be("MyUserAgent/1.0");