Fix ExecuteWorkInIsolation ignores MultiTenancy configuration

src/NHibernate.Test/Async/MultiTenancy/DatabaseStrategyNoDbSpecificFixture.cs

@@ -19,6 +19,7 @@
 using NHibernate.Dialect;
 using NHibernate.Driver;
 using NHibernate.Engine;
+using NHibernate.Engine.Transaction;
 using NHibernate.Linq;
 using NHibernate.Mapping.ByCode;
 using NHibernate.MultiTenancy;
@@ -28,6 +29,7 @@
 namespace NHibernate.Test.MultiTenancy
 {
 	using System.Threading.Tasks;
+	using System.Threading;
 	[TestFixture]
 	public class DatabaseStrategyNoDbSpecificFixtureAsync : TestCaseMappingByCode
 	{
@@ -160,6 +162,18 @@ public async Task TenantSessionIsSerializableAndCanBeReconnectedAsync()
 			Assert.That(Sfi.Statistics.SecondLevelCacheHitCount, Is.EqualTo(1));
 		}
 
+		[Test]
+		public async Task TenantIsolatedWorkOpensTenantConnectionAsync()
+		{
+			if (!IsSqlServerDialect)
+				Assert.Ignore("MSSqlServer specific test");
+
+			using (var ses = OpenTenantSession("tenant1"))
+			{
+				await (Isolater.DoIsolatedWorkAsync(new TenantIsolatatedWork("tenant1"), ses.GetSessionImplementation(), CancellationToken.None));
+			}
+		}
+
 		private static string GetTenantId(ISession session)
 		{
 			return session.GetSessionImplementation().GetTenantIdentifier();

src/NHibernate.Test/Async/MultiTenancy/TenantIsolatatedWork.cs

@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by AsyncGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+using System.Data.Common;
+using System.Data.SqlClient;
+using NHibernate.Engine.Transaction;
+
+namespace NHibernate.Test.MultiTenancy
+{
+	using System.Threading.Tasks;
+	using System.Threading;
+	public partial class TenantIsolatatedWork : IIsolatedWork
+	{
+
+		public Task DoWorkAsync(DbConnection connection, DbTransaction transaction, CancellationToken cancellationToken)
+		{
+			var builder = new SqlConnectionStringBuilder(connection.ConnectionString);
+			if (builder.ApplicationName != _tenantName)
+				return Task.FromException<object>(new HibernateException("Invalid tenant connection"));
+			return Task.CompletedTask;
+		}
+	}
+}

src/NHibernate.Test/MultiTenancy/DatabaseStrategyNoDbSpecificFixture.cs

@@ -9,6 +9,7 @@
 using NHibernate.Dialect;
 using NHibernate.Driver;
 using NHibernate.Engine;
+using NHibernate.Engine.Transaction;
 using NHibernate.Linq;
 using NHibernate.Mapping.ByCode;
 using NHibernate.MultiTenancy;
@@ -229,6 +230,18 @@ public void TenantSessionIsSerializableAndCanBeReconnected()
 			Assert.That(Sfi.Statistics.SecondLevelCacheHitCount, Is.EqualTo(1));
 		}
 
+		[Test]
+		public void TenantIsolatedWorkOpensTenantConnection()
+		{
+			if (!IsSqlServerDialect)
+				Assert.Ignore("MSSqlServer specific test");
+
+			using (var ses = OpenTenantSession("tenant1"))
+			{
+				Isolater.DoIsolatedWork(new TenantIsolatatedWork("tenant1"), ses.GetSessionImplementation());
+			}
+		}
+
 		private static string GetTenantId(ISession session)
 		{
 			return session.GetSessionImplementation().GetTenantIdentifier();

src/NHibernate.Test/MultiTenancy/TenantIsolatatedWork.cs

@@ -0,0 +1,23 @@
+using System.Data.Common;
+using System.Data.SqlClient;
+using NHibernate.Engine.Transaction;
+
+namespace NHibernate.Test.MultiTenancy
+{
+	public partial class TenantIsolatatedWork : IIsolatedWork
+	{
+		private readonly string _tenantName;
+
+		public TenantIsolatatedWork(string tenantName)
+		{
+			_tenantName = tenantName;
+		}
+
+		public void DoWork(DbConnection connection, DbTransaction transaction)
+		{
+			var builder = new SqlConnectionStringBuilder(connection.ConnectionString);
+			if (builder.ApplicationName != _tenantName)
+				throw new HibernateException("Invalid tenant connection");
+		}
+	}
+}

src/NHibernate/AdoNet/ConnectionManager.cs

@@ -224,6 +224,19 @@ private void CloseConnection()
 			_connection = null;
 		}
 
+		/// <summary>
+		/// Get a new opened connection. The caller is responsible for closing it.
+		/// </summary>
+		/// <returns>An opened connection.</returns>
+		public DbConnection GetNewConnection()
+		{
+			return _connectionAccess.GetConnection();
+		}
+
+		/// <summary>
+		/// Get the managed connection.
+		/// </summary>
+		/// <returns>An opened connection.</returns>
 		public DbConnection GetConnection()
 		{
 			if (!_allowConnectionUsage)
@@ -254,7 +267,7 @@ public DbConnection GetConnection()
 			{
 				if (_ownConnection)
 				{
-					_connection = _connectionAccess.GetConnection();
+					_connection = GetNewConnection();
 					// Will fail if the connection is already enlisted in another transaction.
 					// Probable case: nested transaction scope with connection auto-enlistment enabled.
 					// That is an user error.

src/NHibernate/Async/AdoNet/ConnectionManager.cs

@@ -25,6 +25,25 @@ namespace NHibernate.AdoNet
 	public partial class ConnectionManager : ISerializable, IDeserializationCallback
 	{
 
+		/// <summary>
+		/// Get a new opened connection. The caller is responsible for closing it.
+		/// </summary>
+		/// <param name="cancellationToken">A cancellation token that can be used to cancel the work</param>
+		/// <returns>An opened connection.</returns>
+		public Task<DbConnection> GetNewConnectionAsync(CancellationToken cancellationToken)
+		{
+			if (cancellationToken.IsCancellationRequested)
+			{
+				return Task.FromCanceled<DbConnection>(cancellationToken);
+			}
+			return _connectionAccess.GetConnectionAsync(cancellationToken);
+		}
+
+		/// <summary>
+		/// Get the managed connection.
+		/// </summary>
+		/// <param name="cancellationToken">A cancellation token that can be used to cancel the work</param>
+		/// <returns>An opened connection.</returns>
 		public Task<DbConnection> GetConnectionAsync(CancellationToken cancellationToken)
 		{
 			if (!_allowConnectionUsage)
@@ -62,7 +81,7 @@ async Task<DbConnection> InternalGetConnectionAsync()
 				{
 					if (_ownConnection)
 					{
-						_connection = await (_connectionAccess.GetConnectionAsync(cancellationToken)).ConfigureAwait(false);
+						_connection = await (GetNewConnectionAsync(cancellationToken)).ConfigureAwait(false);
 						// Will fail if the connection is already enlisted in another transaction.
 						// Probable case: nested transaction scope with connection auto-enlistment enabled.
 						// That is an user error.

src/NHibernate/Async/Transaction/AdoNetTransactionFactory.cs

@@ -47,7 +47,7 @@ async Task InternalExecuteWorkInIsolationAsync()
 					// since SQLite only allows one connection to the database.
 					connection = session.Factory.Dialect is SQLiteDialect
 						? session.Connection
-						: await (session.Factory.ConnectionProvider.GetConnectionAsync(cancellationToken)).ConfigureAwait(false);
+						: await (session.ConnectionManager.GetNewConnectionAsync(cancellationToken)).ConfigureAwait(false);
 
 					if (transacted)
 					{

src/NHibernate/Transaction/AdoNetTransactionFactory.cs

@@ -57,7 +57,7 @@ public virtual void ExecuteWorkInIsolation(ISessionImplementor session, IIsolate
 				// since SQLite only allows one connection to the database.
 				connection = session.Factory.Dialect is SQLiteDialect
 					? session.Connection
-					: session.Factory.ConnectionProvider.GetConnection();
+					: session.ConnectionManager.GetNewConnection();
 
 				if (transacted)
 				{