/// <summary> /// Begin a new transaction with the given transaction definition. /// </summary> /// <param name="transaction"> /// Transaction object returned by /// <see cref="Spring.Transaction.Support.AbstractPlatformTransactionManager.DoGetTransaction"/>. /// </param> /// <param name="definition"> /// <see cref="Spring.Transaction.ITransactionDefinition"/> instance, describing /// propagation behavior, isolation level, timeout etc. /// </param> /// <remarks> /// Does not have to care about applying the propagation behavior, /// as this has already been handled by this abstract manager. /// </remarks> /// <exception cref="Spring.Transaction.TransactionException"> /// In the case of creation or system errors. /// </exception> protected override void DoBegin(object transaction, ITransactionDefinition definition) { TxScopeTransactionManager.PromotableTxScopeTransactionObject promotableTxScopeTransactionObject = ((HibernateTransactionObject)transaction).PromotableTxScopeTransactionObject; try { DoTxScopeBegin(promotableTxScopeTransactionObject, definition); } catch (Exception e) { throw new CannotCreateTransactionException("Transaction Scope failure on begin", e); } HibernateTransactionObject txObject = (HibernateTransactionObject)transaction; if (DbProvider != null && TransactionSynchronizationManager.HasResource(DbProvider) && !txObject.ConnectionHolder.SynchronizedWithTransaction) { throw new IllegalTransactionStateException( "Pre-bound ADO.NET Connection found - HibernateTransactionManager does not support " + "running within AdoTransactionManager if told to manage the DbProvider itself. " + "It is recommended to use a single HibernateTransactionManager for all transactions " + "on a single DbProvider, no matter whether Hibernate or ADO.NET access."); } ISession session = null; try { if (txObject.SessionHolder == null || txObject.SessionHolder.SynchronizedWithTransaction) { IInterceptor interceptor = EntityInterceptor; ISession newSession = (interceptor != null ? SessionFactory.OpenSession(interceptor) : SessionFactory.OpenSession()); if (log.IsDebugEnabled) { log.Debug("Opened new Session [" + newSession + "] for Hibernate transaction"); } txObject.SetSessionHolder(new SessionHolder(newSession), true); } txObject.SessionHolder.SynchronizedWithTransaction = true; session = txObject.SessionHolder.Session; IDbConnection con = session.Connection; //TODO isolation level mgmt //IsolationLevel previousIsolationLevel = if (definition.ReadOnly && txObject.NewSessionHolder) { // Just set to NEVER in case of a new Session for this transaction. session.FlushMode = FlushMode.Never; } if (!definition.ReadOnly && !txObject.NewSessionHolder) { // We need AUTO or COMMIT for a non-read-only transaction. FlushMode flushMode = session.FlushMode; if (FlushMode.Never == flushMode) { session.FlushMode = FlushMode.Auto; txObject.SessionHolder.PreviousFlushMode = flushMode; } } // Add the Hibernate transaction to the session holder. // for now pass in tx options isolation level. ITransaction hibernateTx = session.BeginTransaction(definition.TransactionIsolationLevel); IDbTransaction adoTx = GetIDbTransaction(hibernateTx); // Add the Hibernate transaction to the session holder. txObject.SessionHolder.Transaction = hibernateTx; // Register transaction timeout. int timeout = DetermineTimeout(definition); if (timeout != DefaultTransactionDefinition.TIMEOUT_DEFAULT) { txObject.SessionHolder.TimeoutInSeconds = timeout; } // Register the Hibernate Session's ADO.NET Connection/TX pair for the DbProvider, if set. if (DbProvider != null) { //investigate passing null for tx. ConnectionHolder conHolder = new ConnectionHolder(con, adoTx); if (timeout != DefaultTransactionDefinition.TIMEOUT_DEFAULT) { conHolder.TimeoutInMillis = definition.TransactionTimeout; } if (log.IsDebugEnabled) { log.Debug("Exposing Hibernate transaction as ADO transaction [" + con + "]"); } TransactionSynchronizationManager.BindResource(DbProvider, conHolder); txObject.ConnectionHolder = conHolder; } // Bind the session holder to the thread. if (txObject.NewSessionHolder) { TransactionSynchronizationManager.BindResource(SessionFactory, txObject.SessionHolder); } } catch (Exception ex) { SessionFactoryUtils.CloseSession(session); throw new CannotCreateTransactionException("Could not open Hibernate Session for transaction", ex); } }