Informix, NHibernate, TransactionScope interaction difficulties
- by John Prideaux
I have a small program that is trying to wrap an NHibernate insert into an Informix database in a TransactionScope object using the Informix .NET Provider. I am getting the error specified below. The code without the TransactionScope object works -- including when the insert is wrapped in an NHibernate session transaction. Any ideas on what the problem is? BTW, without the EnterpriseServicesInterop, the Informix .NET Provider will not participate in a TransactionScope transaction (verified without NHibernate involved).
Code Snippet:
public static void TestTScope()
{
Employee johnp = new Employee { name = "John Prideaux" };
using (TransactionScope tscope = new TransactionScope(
TransactionScopeOption.Required,
new TransactionOptions() { Timeout = new TimeSpan(0, 1, 0),
IsolationLevel = IsolationLevel.ReadCommitted },
EnterpriseServicesInteropOption.Full))
{
using (ISession session = OpenSession())
{
session.Save(johnp);
Console.WriteLine("Saved John to the database");
}
}
Console.WriteLine("Transaction should be rolled back");
}
static ISession OpenSession()
{
if (factory == null)
{
Configuration c = new Configuration();
c.AddAssembly(Assembly.GetCallingAssembly());
factory = c.BuildSessionFactory();
}
return factory.OpenSession();
}
static ISessionFactory factory;
Stack Trace:
NHibernate.ADOException was unhandled
Message="Could not close IBM.Data.Informix.IfxConnection connection"
Source="NHibernate"
StackTrace:
at NHibernate.Connection.ConnectionProvider.CloseConnection(IDbConnection conn)
at NHibernate.Connection.DriverConnectionProvider.CloseConnection(IDbConnection conn)
at NHibernate.Tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.Release()
at NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.GetReservedWords(Dialect dialect, IConnectionHelper connectionHelper)
at NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.Update(ISessionFactory sessionFactory)
at NHibernate.Impl.SessionFactoryImpl..ctor(Configuration cfg, IMapping mapping, Settings settings, EventListeners listeners)
at NHibernate.Cfg.Configuration.BuildSessionFactory()
at HelloNHibernate.Employee.OpenSession() in D:\Development\ScratchProject\HelloNHibernate\Employee.cs:line 73
at HelloNHibernate.Employee.TestTScope() in D:\Development\ScratchProject\HelloNHibernate\Employee.cs:line 53
at HelloNHibernate.Program.Main(String[] args) in D:\Development\ScratchProject\HelloNHibernate\Program.cs:line 19
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: IBM.Data.Informix.IfxException
Message="ERROR - no error information available"
Source="IBM.Data.Informix"
ErrorCode=-2147467259
StackTrace:
at IBM.Data.Informix.IfxConnection.HandleError(IntPtr hHandle, SQL_HANDLE hType, RETCODE retcode)
at IBM.Data.Informix.IfxConnection.DisposeClose()
at IBM.Data.Informix.IfxConnection.Close()
at NHibernate.Connection.ConnectionProvider.CloseConnection(IDbConnection conn)
InnerException:
