Added ConnectTimeout: time to wait (in seconds) while trying to establish a connection

src/Ydb.Sdk/CHANGELOG.md

@@ -1,3 +1,5 @@
+- Added `ConnectTimeout`: time to wait (in seconds) while trying to establish a connection.
+
 ## v0.18.2
 
 - Fixed YdbException: propagate inner exception.

src/Ydb.Sdk/src/Ado/YdbConnectionStringBuilder.cs

@@ -29,6 +29,7 @@ private void InitDefaultValues()
         _database = "/local";
         _maxSessionPool = 100;
         _useTls = false;
+        _connectTimeout = GrpcDefaultSettings.ConnectTimeoutSeconds;
         _keepAlivePingDelay = GrpcDefaultSettings.DefaultKeepAlivePingSeconds;
         _keepAlivePingTimeout = GrpcDefaultSettings.DefaultKeepAlivePingTimeoutSeconds;
         _enableMultipleHttp2Connections = false;
@@ -145,6 +146,23 @@ public string? RootCertificate
 
     private string? _rootCertificate;
 
+    public int ConnectTimeout
+    {
+        get => _connectTimeout;
+        set
+        {
+            if (value < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(value), value, "Invalid connect timeout: " + value);
+            }
+
+            _connectTimeout = value;
+            SaveValue(nameof(ConnectTimeout), value);
+        }
+    }
+
+    private int _connectTimeout;
+
     public int KeepAlivePingDelay
     {
         get => _keepAlivePingDelay;
@@ -283,6 +301,9 @@ internal async Task<IDriver> BuildDriver()
             customServerCertificates: ServerCertificates
         )
         {
+            ConnectTimeout = ConnectTimeout == 0
+                ? Timeout.InfiniteTimeSpan
+                : TimeSpan.FromSeconds(ConnectTimeout),
             KeepAlivePingDelay = KeepAlivePingDelay == 0
                 ? Timeout.InfiniteTimeSpan
                 : TimeSpan.FromSeconds(KeepAlivePingDelay),
@@ -367,10 +388,12 @@ static YdbConnectionOption()
                 "MaxSessionPool", "Max Session Pool", "Maximum Pool Size", "Max Pool Size", "MaximumPoolSize");
             AddOption(new YdbConnectionOption<bool>(BoolExtractor, (builder, useTls) => builder.UseTls = useTls),
                 "UseTls", "Use Tls");
-            AddOption(
-                new YdbConnectionOption<string>(StringExtractor,
+            AddOption(new YdbConnectionOption<string>(StringExtractor,
                     (builder, rootCertificate) => builder.RootCertificate = rootCertificate),
                 "RootCertificate", "Root Certificate");
+            AddOption(new YdbConnectionOption<int>(IntExtractor,
+                    (builder, connectTimeout) => builder.ConnectTimeout = connectTimeout),
+                "ConnectTimeout", "Connect Timeout");
             AddOption(new YdbConnectionOption<int>(IntExtractor,
                     (builder, keepAlivePingDelay) => builder.KeepAlivePingDelay = keepAlivePingDelay),
                 "KeepAlivePingDelay", "Keep Alive Ping Delay");

src/Ydb.Sdk/src/DriverConfig.cs

@@ -10,6 +10,9 @@ public class DriverConfig
     public string Database { get; }
     public ICredentialsProvider? Credentials { get; }
 
+    public TimeSpan ConnectTimeout { get; init; } =
+        TimeSpan.FromSeconds(GrpcDefaultSettings.ConnectTimeoutSeconds);
+
     public TimeSpan KeepAlivePingDelay { get; init; } =
         TimeSpan.FromSeconds(GrpcDefaultSettings.DefaultKeepAlivePingSeconds);
 

src/Ydb.Sdk/src/GrpcDefaultSettings.cs

@@ -15,4 +15,6 @@ internal static class GrpcDefaultSettings
     internal const int MaxSendMessageSize = 64 * 1024 * 1024; // 64 Mb
 
     internal const int MaxReceiveMessageSize = 64 * 1024 * 1024; // 64 Mb
+
+    internal const int ConnectTimeoutSeconds = 5;
 }

src/Ydb.Sdk/src/Pool/ChannelPool.cs

@@ -102,6 +102,7 @@ public GrpcChannel CreateChannel(string endpoint)
 
         var httpHandler = new SocketsHttpHandler
         {
+            ConnectTimeout = _config.ConnectTimeout,
             // https://github.com/grpc/proposal/blob/master/A8-client-side-keepalive.md
             KeepAlivePingDelay = _config.KeepAlivePingDelay,
             KeepAlivePingTimeout = _config.KeepAlivePingTimeout,

src/Ydb.Sdk/tests/Ado/YdbConnectionStringBuilderTests.cs

@@ -16,6 +16,7 @@ public void InitDefaultValues_WhenEmptyConstructorInvoke_ReturnDefaultConnection
         Assert.Equal(100, ydbConnectionStringBuilder.MaxSessionPool);
         Assert.Null(ydbConnectionStringBuilder.User);
         Assert.Null(ydbConnectionStringBuilder.Password);
+        Assert.Equal(5, ydbConnectionStringBuilder.ConnectTimeout);
         Assert.Equal(10, ydbConnectionStringBuilder.KeepAlivePingDelay);
         Assert.Equal(10, ydbConnectionStringBuilder.KeepAlivePingTimeout);
         Assert.Equal("", ydbConnectionStringBuilder.ConnectionString);
@@ -40,7 +41,7 @@ public void InitConnectionStringBuilder_WhenExpectedKeys_ReturnUpdatedConnection
     {
         var connectionString =
             new YdbConnectionStringBuilder("Host=server;Port=2135;Database=/my/path;User=Kirill;UseTls=true;" +
-                                           "KeepAlivePingDelay=30;KeepAlivePingTimeout=60;" +
+                                           "ConnectTimeout=30;KeepAlivePingDelay=30;KeepAlivePingTimeout=60;" +
                                            "EnableMultipleHttp2Connections=true;" +
                                            "MaxSendMessageSize=1000000;MaxReceiveMessageSize=1000000;" +
                                            "DisableDiscovery=true");
@@ -50,14 +51,15 @@ public void InitConnectionStringBuilder_WhenExpectedKeys_ReturnUpdatedConnection
         Assert.Equal("/my/path", connectionString.Database);
         Assert.Equal(100, connectionString.MaxSessionPool);
         Assert.Equal("Kirill", connectionString.User);
+        Assert.Equal(30, connectionString.ConnectTimeout);
         Assert.Equal(30, connectionString.KeepAlivePingDelay);
         Assert.Equal(60, connectionString.KeepAlivePingTimeout);
         Assert.Null(connectionString.Password);
         Assert.True(connectionString.EnableMultipleHttp2Connections);
         Assert.Equal(1000000, connectionString.MaxSendMessageSize);
         Assert.Equal(1000000, connectionString.MaxReceiveMessageSize);
         Assert.Equal("Host=server;Port=2135;Database=/my/path;User=Kirill;UseTls=True;" +
-                     "KeepAlivePingDelay=30;KeepAlivePingTimeout=60;" +
+                     "ConnectTimeout=30;KeepAlivePingDelay=30;KeepAlivePingTimeout=60;" +
                      "EnableMultipleHttp2Connections=True;" +
                      "MaxSendMessageSize=1000000;MaxReceiveMessageSize=1000000;" +
                      "DisableDiscovery=True", connectionString.ConnectionString);