Question

I have a question about transaction on NHibernate. As far as i know there are two ways to retrieve ITransaction from ISession.

Option 1

ISession.BeginTransaction();

Option 2

ISession.Transaction;

If i execute them consecutively like this

ITransaction trans = session.BeginTransaction();
ITransaction trans2 = session.Transaction;

Is trans equal trans2 ?

Answer 1

NHibernate source @ https://github.com/nhibernate

from session implementation of Isession @ NHibernate.Impl.SessionImpl

public ITransaction BeginTransaction()
{
    using (new SessionIdLoggingContext(SessionId))
    {
        if (rootSession != null)
        {
            // Todo : should seriously consider not allowing a txn to begin from a child session
            //      can always route the request to the root session...
            log.Warn("Transaction started on non-root session");
        }

        CheckAndUpdateSessionStatus();
        return connectionManager.BeginTransaction();
    }
}

public ITransaction Transaction
{
    get { return connectionManager.Transaction; }
}

from NHibernate.Adonet.ConnectionManager class

public ITransaction BeginTransaction()
{
    Transaction.Begin();
    return transaction;
}

public ITransaction Transaction
{
     get
     {
         if (transaction == null)
         {
              transaction = session.Factory.TransactionFactory.CreateTransaction(session);
         }

         return transaction;
     }
}