public void Rollback(SinglePhaseEnlistment enlistment) { SqlInternalConnection validConnection = this.GetValidConnection(); SqlConnection connection = validConnection.Connection; Bid.Trace("<sc.SqlDelegatedTransaction.Rollback|RES|CPOOL> %d#, Connection %d#, aborting transaction.\n", this.ObjectID, validConnection.ObjectID); RuntimeHelpers.PrepareConstrainedRegions(); try { lock (validConnection) { try { this.ValidateActiveOnConnection(validConnection); this._active = false; this._connection = null; validConnection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Rollback, null, System.Data.IsolationLevel.Unspecified, this._internalTransaction, true); } catch (SqlException exception5) { ADP.TraceExceptionWithoutRethrow(exception5); validConnection.DoomThisConnection(); } catch (InvalidOperationException exception4) { ADP.TraceExceptionWithoutRethrow(exception4); validConnection.DoomThisConnection(); } } validConnection.CleanupConnectionOnTransactionCompletion(this._atomicTransaction); enlistment.Aborted(); } catch (OutOfMemoryException exception3) { connection.Abort(exception3); throw; } catch (StackOverflowException exception2) { connection.Abort(exception2); throw; } catch (ThreadAbortException exception) { connection.Abort(exception); throw; } }
// Called by the transaction to initiate commit sequence public void SinglePhaseCommit(SinglePhaseEnlistment enlistment) { Debug.Assert(null != enlistment, "null enlistment?"); SqlInternalConnection connection = GetValidConnection(); SqlConnection usersConnection = connection.Connection; RuntimeHelpers.PrepareConstrainedRegions(); try { // If the connection is dooomed, we can be certain that the // transaction will eventually be rolled back, and we shouldn't // attempt to commit it. if (connection.IsConnectionDoomed) { lock (connection) { _active = false; // set to inactive first, doesn't matter how the rest completes, this transaction is done. _connection = null; } enlistment.Aborted(SQL.ConnectionDoomed()); } else { Exception commitException; lock (connection) { try { // Now that we've acquired the lock, make sure we still have valid state for this operation. ValidateActiveOnConnection(connection); _active = false; // set to inactive first, doesn't matter how the rest completes, this transaction is done. _connection = null; // Set prior to ExecuteTransaction call in case this initiates a TransactionEnd event connection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Commit, null, IsolationLevel.Unspecified, _internalTransaction, true); commitException = null; } catch (SqlException e) { commitException = e; // Doom the connection, to make sure that the transaction is // eventually rolled back. // VSTS 144562: doom the connection while having the lock on it to prevent race condition with "Transaction Ended" Event connection.DoomThisConnection(); } catch (InvalidOperationException e) { commitException = e; connection.DoomThisConnection(); } } if (commitException != null) { // connection.ExecuteTransaction failed with exception if (_internalTransaction.IsCommitted) { // Even though we got an exception, the transaction // was committed by the server. enlistment.Committed(); } else if (_internalTransaction.IsAborted) { // The transaction was aborted, report that to // SysTx. enlistment.Aborted(commitException); } else { // The transaction is still active, we cannot // know the state of the transaction. enlistment.InDoubt(commitException); } // We eat the exception. This is called on the SysTx // thread, not the applications thread. If we don't // eat the exception an UnhandledException will occur, // causing the process to FailFast. } connection.CleanupConnectionOnTransactionCompletion(_atomicTransaction); if (commitException == null) { // connection.ExecuteTransaction succeeded enlistment.Committed(); } } } catch (System.OutOfMemoryException e) { usersConnection.Abort(e); throw; } catch (System.StackOverflowException e) { usersConnection.Abort(e); throw; } catch (System.Threading.ThreadAbortException e) { usersConnection.Abort(e); throw; } }
// Called by transaction to initiate abort sequence public void Rollback(SinglePhaseEnlistment enlistment) { Debug.Assert(null != enlistment, "null enlistment?"); SqlInternalConnection connection = GetValidConnection(); SqlConnection usersConnection = connection.Connection; RuntimeHelpers.PrepareConstrainedRegions(); try { lock (connection) { try { // Now that we've acquired the lock, make sure we still have valid state for this operation. ValidateActiveOnConnection(connection); _active = false; // set to inactive first, doesn't matter how the execute completes, this transaction is done. _connection = null; // Set prior to ExecuteTransaction call in case this initiates a TransactionEnd event // If we haven't already rolled back (or aborted) then tell the SQL Server to roll back if (!_internalTransaction.IsAborted) { connection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Rollback, null, IsolationLevel.Unspecified, _internalTransaction, true); } } catch (SqlException) { // Doom the connection, to make sure that the transaction is // eventually rolled back. // VSTS 144562: doom the connection while having the lock on it to prevent race condition with "Transaction Ended" Event connection.DoomThisConnection(); // Unlike SinglePhaseCommit, a rollback is a rollback, regardless // of how it happens, so SysTx won't throw an exception, and we // don't want to throw an exception either, because SysTx isn't // handling it and it may create a fail fast scenario. In the end, // there is no way for us to communicate to the consumer that this // failed for more serious reasons than usual. // // This is a bit like "should you throw if Close fails", however, // it only matters when you really need to know. In that case, // we have the tracing that we're doing to fallback on for the // investigation. } catch (InvalidOperationException) { connection.DoomThisConnection(); } } // it doesn't matter whether the rollback succeeded or not, we presume // that the transaction is aborted, because it will be eventually. connection.CleanupConnectionOnTransactionCompletion(_atomicTransaction); enlistment.Aborted(); } catch (System.OutOfMemoryException e) { usersConnection.Abort(e); throw; } catch (System.StackOverflowException e) { usersConnection.Abort(e); throw; } catch (System.Threading.ThreadAbortException e) { usersConnection.Abort(e); throw; } }