NH-4015 - Update Npgsql and enable DTC for it.

Author: fredericDelaporte

lib/teamcity/postgresql/Mono.Security.dll

@@ -6,6 +6,9 @@ Installation steps for PostgreSQL for NH TeamCity:
 3.  Leave the port number at the default (5432), and leave the default locale;
 4.  The setup should install PostgreSQL on the machine;
 5.  Untick the option to install stack-builder at the end (it's not required).
+6.  Find the postgresql.conf file. It lies in the directory for the databases files.
+7.  Edit its max_prepared_transactions parameter to a positive integer. 100 by example. (This enables distributed transactions.)
+8.  Restart PostgreSQL server.
 
 Creating the NH user:
 

lib/teamcity/postgresql/Npgsql.dll

@@ -8,7 +8,7 @@ for your own use before compile tests in VisualStudio.
 	<session-factory name="NHibernate.Test">
 		<property name="connection.driver_class">NHibernate.Driver.NpgsqlDriver</property>
 		<property name="connection.connection_string">
-			Server=localhost;Database=nhibernate;User ID=nhibernate;Password=nhibernate;
+			Server=localhost;Database=nhibernate;User ID=nhibernate;Password=nhibernate;Enlist=true;
 		</property>
 		<property name="dialect">NHibernate.Dialect.PostgreSQL83Dialect</property>
 	</session-factory>

lib/teamcity/postgresql/Npgsql.xml

@@ -276,6 +276,9 @@ public void CanDeleteItemInDtc()
 				}
 			}
 
+			// Dodging "latency" due to db still haven't actually committed a distributed tx after scope disposal.
+			Thread.Sleep(100);
+
 			using (var tx = new TransactionScope())
 			{
 				using (ISession s = OpenSession())
@@ -287,6 +290,9 @@ public void CanDeleteItemInDtc()
 					tx.Complete();
 				}
 			}
+
+			// Dodging "latency" due to db still haven't actually committed a distributed tx after scope disposal.
+			Thread.Sleep(100);
 		}
 
 		[Test]

lib/teamcity/postgresql/postgresql_installation.txt

@@ -95,6 +95,9 @@
       <HintPath>..\packages\System.Linq.Dynamic.1.0.7\lib\net40\System.Linq.Dynamic.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="System.Threading.Tasks.Extensions, Version=4.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Threading.Tasks.Extensions.4.3.0\lib\portable-net45+win8+wp8+wpa81\System.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
     <Reference Include="System.Transactions" />
     <Reference Include="System.Xml" />
     <Reference Include="System.Xml.Linq">

src/NHibernate.Config.Templates/PostgreSQL.cfg.xml

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace NHibernate.Test.TestDialects
+namespace NHibernate.Test.TestDialects
 {
 	public class PostgreSQL83TestDialect : TestDialect
 	{
@@ -21,13 +16,5 @@ public override bool SupportsNullCharactersInUtfStrings
         {
             get { return false; }
         }
-
-        /// <summary>
-        /// Npgsql's DTC code seems to be somewhat broken as of 2.0.11.
-        /// </summary>
-        public override bool SupportsDistributedTransactions
-        {
-            get { return false; }
-        }
 	}
 }

src/NHibernate.Test/NHSpecificTest/DtcFailures/DtcFailuresFixture.cs

@@ -6,4 +6,6 @@
   <package id="NUnit" version="3.6.0" targetFramework="net461" />
   <package id="Remotion.Linq" version="1.15.15.0" targetFramework="net461" />
   <package id="System.Linq.Dynamic" version="1.0.7" targetFramework="net461" />
+  <!-- System.Threading.Tasks.Extensions is required for dynamically loaded Npgsql.dll (Postgresql driver) -->
+  <package id="System.Threading.Tasks.Extensions" version="4.3.0" targetFramework="net461" />
 </packages>

src/NHibernate.Test/NHibernate.Test.csproj

@@ -1,7 +1,5 @@
-using System;
 using System.Data;
 using System.Data.Common;
-using System.Linq;
 
 namespace NHibernate.Driver
 {

src/NHibernate.Test/TestDialects/PostgreSQL83TestDialect.cs

@@ -140,7 +140,7 @@
 	<target name="setup-teamcity-postgresql">
 		<property name="nhibernate.connection.driver_class"			value="NHibernate.Driver.NpgsqlDriver" />
 		<property name="nhibernate.dialect"							value="NHibernate.Dialect.PostgreSQL83Dialect" />
-		<property name="nhibernate.connection.connection_string"	value="Host=localhost;Port=5432;Database=nhibernate;Username=nhibernate;Password=nhibernate" />
+		<property name="nhibernate.connection.connection_string"	value="Host=localhost;Port=5432;Database=nhibernate;Username=nhibernate;Password=nhibernate;Enlist=true" />
 		<copy todir="${bin.dir}">
 			<fileset basedir="${root.dir}/lib/teamcity/postgresql">
 				<include name="*.dll"/>