public void Rollback(string transactionName)
{
SqlConnection.ExecutePermission.Demand(); // MDAC 81476
ZombieCheck();
SqlStatistics statistics = null;
IntPtr hscp;
Bid.ScopeEnter(out hscp, "<sc.SqlTransaction.Rollback|API> %d# transactionName='%ls'", ObjectID, transactionName);
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try {
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(_connection);
statistics = SqlStatistics.StartTimer(Statistics);
_isFromAPI = true;
_internalTransaction.Rollback(transactionName);
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException e) {
_connection.Abort(e);
throw;
}
catch (System.StackOverflowException e) {
_connection.Abort(e);
throw;
}
catch (System.Threading.ThreadAbortException e) {
_connection.Abort(e);
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
finally {
_isFromAPI = false;
SqlStatistics.StopTimer(statistics);
Bid.ScopeLeave(ref hscp);
}
}
/// <include file='../../../../../../doc/snippets/Microsoft.Data.SqlClient/SqlCommandBuilder.xml' path='docs/members[@name="SqlCommandBuilder"]/DeriveParameters/*'/>
public static void DeriveParameters(SqlCommand command)
{
#if NETFRAMEWORK
SqlConnection.ExecutePermission.Demand();
#endif
if (null == command)
{
throw ADP.ArgumentNull(nameof(command));
}
#if NETFRAMEWORK
TdsParser bestEffortCleanupTarget = null;
#endif
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if NETFRAMEWORK
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif // DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(command.Connection);
#endif // NETFRAMEWORK
command.DeriveParameters();
#if NETFRAMEWORK
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif // DEBUG
#endif // NETFRAMEWORK
}
catch (OutOfMemoryException e)
{
command?.Connection?.Abort(e);
throw;
}
catch (StackOverflowException e)
{
command?.Connection?.Abort(e);
throw;
}
catch (ThreadAbortException e)
{
command?.Connection?.Abort(e);
#if NETFRAMEWORK
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
#endif
throw;
}
}
// Check for connection validity
private SqlInternalConnection GetValidConnection()
{
SqlInternalConnection connection = _connection;
if (null == connection && _atomicTransaction.TransactionInformation.Status != SysTx.TransactionStatus.Aborted)
{
throw ADP.ObjectDisposed(this);
}
return(connection);
}
// Check for connection validity
private SqlInternalConnection GetValidConnection()
{
SqlInternalConnection connection = _connection;
if (null == connection)
{
throw ADP.ObjectDisposed(this);
}
return(connection);
}
static public void DeriveParameters(SqlCommand command) // MDAC 65927\
{
SqlConnection.ExecutePermission.Demand();
if (null == command)
{
throw ADP.ArgumentNull("command");
}
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try {
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(command.Connection);
command.DeriveParameters();
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif
}
catch (System.OutOfMemoryException e) {
if (null != command && null != command.Connection)
{
command.Connection.Abort(e);
}
throw;
}
catch (System.StackOverflowException e) {
if (null != command && null != command.Connection)
{
command.Connection.Abort(e);
}
throw;
}
catch (System.Threading.ThreadAbortException e) {
if (null != command && null != command.Connection)
{
command.Connection.Abort(e);
}
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
}
internal SqlInternalTransaction(SqlInternalConnection innerConnection, TransactionType type, SqlTransaction outerTransaction, long transactionId)
{
_innerConnection = innerConnection;
_transactionType = type;
if (null != outerTransaction)
{
_parent = new WeakReference(outerTransaction);
}
_transactionId = transactionId;
RestoreBrokenConnection = false;
ConnectionHasBeenRestored = false;
}
/// <include file='..\..\..\..\..\..\..\doc\snippets\Microsoft.Data.SqlClient\SqlTransaction.xml' path='docs/members[@name="SqlTransaction"]/DisposeDisposing/*' />
protected override void Dispose(bool disposing)
{
if (disposing)
{
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(_connection);
if (!IsZombied && !IsYukonPartialZombie)
{
_internalTransaction.Dispose();
}
}
#if DEBUG
finally
{
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException e)
{
_connection.Abort(e);
throw;
}
catch (System.StackOverflowException e)
{
_connection.Abort(e);
throw;
}
catch (System.Threading.ThreadAbortException e)
{
_connection.Abort(e);
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
}
base.Dispose(disposing);
}
////////////////////////////////////////////////////////////////////////////////////////
// INTERNAL METHODS
////////////////////////////////////////////////////////////////////////////////////////
internal void Zombie()
{
// For Yukon, we have to defer "zombification" until
// we get past the users' next rollback, else we'll
// throw an exception there that is a breaking change.
// Of course, if the connection is already closed,
// then we're free to zombify...
SqlInternalConnection internalConnection = (_connection.InnerConnection as SqlInternalConnection);
if (internalConnection == null || _isFromAPI)
{
_internalTransaction = null; // pre-yukon zombification
}
}
internal SqlInternalTransaction(SqlInternalConnection innerConnection, TransactionType type, SqlTransaction outerTransaction, long transactionId)
{
SqlClientEventSource.Log.TryPoolerTraceEvent("SqlInternalTransaction.ctor | RES | CPOOL | Object Id {0}, Created for connection {1}, outer transaction {2}, Type {3}", ObjectID, innerConnection.ObjectID, outerTransaction?.ObjectID, (int)type);
_innerConnection = innerConnection;
_transactionType = type;
if (null != outerTransaction)
{
_parent = new WeakReference <SqlTransaction>(outerTransaction);
}
_transactionId = transactionId;
RestoreBrokenConnection = false;
ConnectionHasBeenRestored = false;
}
public void Initialize()
{
// if we get here, then we know for certain that we're the delegated
// transaction.
SqlInternalConnection connection = _connection;
SqlConnection usersConnection = connection.Connection;
SqlClientEventSource.Log.TryTraceEvent("SqlDelegatedTransaction.Initialize | RES | CPOOL | Object Id {0}, Client Connection Id {1}, delegating transaction.", ObjectID, usersConnection?.ClientConnectionId);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
if (connection.IsEnlistedInTransaction)
{
SqlClientEventSource.Log.TryTraceEvent("SqlDelegatedTransaction.Initialize | RES | CPOOL | {0}, Client Connection Id {1}, was enlisted, now defecting.", ObjectID, usersConnection?.ClientConnectionId);
// defect first
connection.EnlistNull();
}
_internalTransaction = new SqlInternalTransaction(connection, TransactionType.Delegated, null);
connection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Begin, null, _isolationLevel, _internalTransaction, true);
// Handle case where ExecuteTran didn't produce a new transaction, but also didn't throw.
if (null == connection.CurrentTransaction)
{
connection.DoomThisConnection();
throw ADP.InternalError(ADP.InternalErrorCode.UnknownTransactionFailure);
}
_active = true;
}
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;
}
}
internal SqlTransaction(SqlInternalConnection internalConnection, SqlConnection con,
IsolationLevel iso, SqlInternalTransaction internalTransaction)
{
_isolationLevel = iso;
_connection = con;
if (internalTransaction == null)
{
_internalTransaction = new SqlInternalTransaction(internalConnection, TransactionType.LocalFromAPI, this);
}
else
{
Debug.Assert(internalConnection.CurrentTransaction == internalTransaction, "Unexpected Parser.CurrentTransaction state!");
_internalTransaction = internalTransaction;
_internalTransaction.InitParent(this);
}
}
// Event notification that transaction ended. This comes from the subscription to the Transaction's
// ended event via the internal connection. If it occurs without a prior Rollback or SinglePhaseCommit call,
// it indicates the transaction was ended externally (generally that one of the DTC participants aborted
// the transaction).
internal void TransactionEnded(Transaction transaction)
{
SqlInternalConnection connection = _connection;
if (connection != null)
{
lock (connection)
{
if (_atomicTransaction.Equals(transaction))
{
// No need to validate active on connection, this operation can be called on completed transactions
_active = false;
_connection = null;
}
}
}
}
////////////////////////////////////////////////////////////////////////////////////////
// INTERNAL METHODS
////////////////////////////////////////////////////////////////////////////////////////
internal void Zombie()
{
// SQLBUDT #402544 For Yukon, we have to defer "zombification" until
// we get past the users' next rollback, else we'll
// throw an exception there that is a breaking change.
// Of course, if the connection is aready closed,
// then we're free to zombify...
SqlInternalConnection internalConnection = (_connection.InnerConnection as SqlInternalConnection);
if (null != internalConnection && internalConnection.IsYukonOrNewer && !_isFromAPI)
{
SqlClientEventSource.Log.AdvanceTrace("<sc.SqlTransaction.Zombie|ADV> {0}# yukon deferred zombie", ObjectID);
}
else
{
_internalTransaction = null; // pre-yukon zombification
}
}
// Event notification that transaction ended. This comes from the subscription to the Transaction's
// ended event via the internal connection. If it occurs without a prior Rollback or SinglePhaseCommit call,
// it indicates the transaction was ended externally (generally that one the the DTC participants aborted
// the transaction).
internal void TransactionEnded(SysTx.Transaction transaction)
{
SqlInternalConnection connection = _connection;
if (connection != null)
{
Bid.Trace("<sc.SqlDelegatedTransaction.TransactionEnded|RES|CPOOL> %d#, Connection %d#, transaction completed externally.\n", ObjectID, connection.ObjectID);
lock (connection) {
if (_atomicTransaction.Equals(transaction))
{
// No need to validate active on connection, this operation can be called on completed transactions
_active = false;
_connection = null;
}
}
}
}
////////////////////////////////////////////////////////////////////////////////////////
// INTERNAL METHODS
////////////////////////////////////////////////////////////////////////////////////////
internal void Zombie()
{
// For 2005, we have to defer "zombification" until
// we get past the users' next rollback, else we'll
// throw an exception there that is a breaking change.
// Of course, if the connection is already closed,
// then we're free to zombify...
SqlInternalConnection internalConnection = (_connection.InnerConnection as SqlInternalConnection);
if (null != internalConnection && !_isFromAPI)
{
SqlClientEventSource.Log.TryAdvancedTraceEvent("SqlTransaction.Zombie | ADV | Object Id {0} 2005 deferred zombie", ObjectID);
}
else
{
_internalTransaction = null; // pre-2005 zombification
}
}
// Event notification that transaction ended. This comes from the subscription to the Transaction's
// ended event via the internal connection. If it occurs without a prior Rollback or SinglePhaseCommit call,
// it indicates the transaction was ended externally (generally that one of the DTC participants aborted
// the transaction).
internal void TransactionEnded(Transaction transaction)
{
SqlInternalConnection connection = _connection;
if (connection != null)
{
SqlClientEventSource.Log.TraceEvent("<sc.SqlDelegatedTransaction.TransactionEnded|RES|CPOOL> {0}, Connection {1}, transaction completed externally.", ObjectID, connection.ObjectID);
lock (connection)
{
if (_atomicTransaction.Equals(transaction))
{
// No need to validate active on connection, this operation can be called on completed transactions
_active = false;
_connection = null;
}
}
}
}
internal SqlInternalTransaction(SqlInternalConnection innerConnection, TransactionType type, SqlTransaction outerTransaction, long transactionId)
{
Bid.PoolerTrace("<sc.SqlInternalTransaction.ctor|RES|CPOOL> %d#, Created for connection %d#, outer transaction %d#, Type %d\n",
ObjectID,
innerConnection.ObjectID,
(null != outerTransaction) ? outerTransaction.ObjectID : -1,
(int)type);
_innerConnection = innerConnection;
_transactionType = type;
if (null != outerTransaction)
{
_parent = new WeakReference(outerTransaction);
}
_transactionId = transactionId;
RestoreBrokenConnection = false;
ConnectionHasBeenRestored = false;
}
// Dooms connection and throws and error if not a valid, active, delegated transaction for the given
// connection. Designed to be called AFTER a lock is placed on the connection, otherwise a normal return
// may not be trusted.
private void ValidateActiveOnConnection(SqlInternalConnection connection)
{
bool valid = _active && (connection == _connection) && (connection.DelegatedTransaction == this);
if (!valid)
{
// Invalid indicates something BAAAD happened (Commit after TransactionEnded, for instance)
// Doom anything remotely involved.
if (null != connection)
{
connection.DoomThisConnection();
}
if (connection != _connection && null != _connection)
{
_connection.DoomThisConnection();
}
throw ADP.InternalError(ADP.InternalErrorCode.UnpooledObjectHasWrongOwner); //TODO: Create a new code
}
}
private bool _active; // Is the transaction active?
internal SqlDelegatedTransaction(SqlInternalConnection connection, SysTx.Transaction tx)
{
Debug.Assert(null != connection, "null connection?");
_connection = connection;
_atomicTransaction = tx;
_active = false;
SysTx.IsolationLevel systxIsolationLevel = tx.IsolationLevel;
// We need to map the System.Transactions IsolationLevel to the one
// that System.Data uses and communicates to SqlServer. We could
// arguably do that in Initialize when the transaction is delegated,
// however it is better to do this before we actually begin the process
// of delegation, in case System.Transactions adds another isolation
// level we don't know about -- we can throw the exception at a better
// place.
switch (systxIsolationLevel)
{
case SysTx.IsolationLevel.ReadCommitted:
_isolationLevel = IsolationLevel.ReadCommitted;
break;
case SysTx.IsolationLevel.ReadUncommitted:
_isolationLevel = IsolationLevel.ReadUncommitted;
break;
case SysTx.IsolationLevel.RepeatableRead:
_isolationLevel = IsolationLevel.RepeatableRead;
break;
case SysTx.IsolationLevel.Serializable:
_isolationLevel = IsolationLevel.Serializable;
break;
case SysTx.IsolationLevel.Snapshot:
_isolationLevel = IsolationLevel.Snapshot;
break;
default:
throw SQL.UnknownSysTxIsolationLevel(systxIsolationLevel);
}
}
// Event notification that transaction ended. This comes from the subscription to the Transaction's
// ended event via the internal connection. If it occurs without a prior Rollback or SinglePhaseCommit call,
// it indicates the transaction was ended externally (generally that one of the DTC participants aborted
// the transaction).
internal void TransactionEnded(Transaction transaction)
{
SqlInternalConnection connection = _connection;
if (connection != null)
{
SqlClientEventSource.Log.TryTraceEvent("SqlDelegatedTransaction.TransactionEnded | RES | CPOOL | Object Id {0}, Connection Id {1}, transaction completed externally.", ObjectID, connection?._objectID);
lock (connection)
{
if (_atomicTransaction.Equals(transaction))
{
// No need to validate active on connection, this operation can be called on completed transactions
_active = false;
_connection = null;
}
// Safest approach is to doom this connection, whose transaction has been aborted externally.
// If we want to avoid dooming the connection for performance, state needs to be properly restored. (future TODO)
connection.DoomThisConnection();
}
}
}
internal void FailoverCheck(SqlInternalConnection connection, bool actualUseFailoverPartner, SqlConnectionString userConnectionOptions, string actualFailoverPartner)
{
if (UseFailoverPartner != actualUseFailoverPartner)
{
base.PoolGroup.Clear();
_useFailoverPartner = actualUseFailoverPartner;
}
// Only construct a new permission set when we're connecting to the
// primary data source, not the failover partner.
if (!_useFailoverPartner && _failoverPartner != actualFailoverPartner)
{
// NOTE: we optimistically generate the permission set to keep
// lock short, but we only do this when we get a new
// failover partner.
lock (this)
{
if (_failoverPartner != actualFailoverPartner)
{
_failoverPartner = actualFailoverPartner;
}
}
}
}
override protected void Deactivate()
{
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.SqlInternalConnection.Deactivate|ADV> {0} deactivating", ObjectID);
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(Connection);
SqlReferenceCollection referenceCollection = (SqlReferenceCollection)ReferenceCollection;
if (null != referenceCollection)
{
referenceCollection.Deactivate();
}
// Invoke subclass-specific deactivation logic
InternalDeactivate();
}
#if DEBUG
finally
{
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException)
{
DoomThisConnection();
throw;
}
catch (System.StackOverflowException)
{
DoomThisConnection();
throw;
}
catch (System.Threading.ThreadAbortException)
{
DoomThisConnection();
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
catch (Exception e)
{
// UNDONE - should not be catching all exceptions!!!
if (!ADP.IsCatchableExceptionType(e))
{
throw;
}
// if an exception occurred, the inner connection will be
// marked as unusable and destroyed upon returning to the
// pool
DoomThisConnection();
ADP.TraceExceptionWithoutRethrow(e);
}
}
virtual internal SqlTransaction BeginSqlTransaction(IsolationLevel iso, string transactionName, bool shouldReconnect)
{
SqlStatistics statistics = null;
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(Connection);
statistics = SqlStatistics.StartTimer(Connection.Statistics);
SqlConnection.ExecutePermission.Demand(); // MDAC 81476
ValidateConnectionForExecute(null);
if (HasLocalTransactionFromAPI)
{
throw ADP.ParallelTransactionsNotSupported(Connection);
}
if (iso == IsolationLevel.Unspecified)
{
iso = IsolationLevel.ReadCommitted; // Default to ReadCommitted if unspecified.
}
SqlTransaction transaction = new SqlTransaction(this, Connection, iso, AvailableInternalTransaction);
transaction.InternalTransaction.RestoreBrokenConnection = shouldReconnect;
ExecuteTransaction(TransactionRequest.Begin, transactionName, iso, transaction.InternalTransaction, false);
transaction.InternalTransaction.RestoreBrokenConnection = false;
return(transaction);
}
#if DEBUG
finally
{
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException e)
{
Connection.Abort(e);
throw;
}
catch (System.StackOverflowException e)
{
Connection.Abort(e);
throw;
}
catch (System.Threading.ThreadAbortException e)
{
Connection.Abort(e);
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
finally
{
SqlStatistics.StopTimer(statistics);
}
}
override public void EnlistTransaction(SysTx.Transaction transaction)
{
SqlConnection.VerifyExecutePermission();
ValidateConnectionForExecute(null);
// If a connection has a local transaction outstanding and you try
// to enlist in a DTC transaction, SQL Server will rollback the
// local transaction and then do the enlist (7.0 and 2000). So, if
// the user tries to do this, throw.
if (HasLocalTransaction)
{
throw ADP.LocalTransactionPresent();
}
if (null != transaction && transaction.Equals(EnlistedTransaction))
{
// No-op if this is the current transaction
return;
}
// If a connection is already enlisted in a DTC transaction and you
// try to enlist in another one, in 7.0 the existing DTC transaction
// would roll back and then the connection would enlist in the new
// one. In SQL 2000 & 2005, when you enlist in a DTC transaction
// while the connection is already enlisted in a DTC transaction,
// the connection simply switches enlistments. Regardless, simply
// enlist in the user specified distributed transaction. This
// behavior matches OLEDB and ODBC.
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(Connection);
Enlist(transaction);
}
#if DEBUG
finally
{
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException e)
{
Connection.Abort(e);
throw;
}
catch (System.StackOverflowException e)
{
Connection.Abort(e);
throw;
}
catch (System.Threading.ThreadAbortException e)
{
Connection.Abort(e);
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
}
/// <include file='..\..\..\..\..\..\..\doc\snippets\Microsoft.Data.SqlClient\SqlTransaction.xml' path='docs/members[@name="SqlTransaction"]/Rollback2/*' />
override public void Rollback()
{
if (IsYukonPartialZombie)
{
// Put something in the trace in case a customer has an issue
SqlClientEventSource.Log.AdvanceTrace("<sc.SqlTransaction.Rollback|ADV> {0}# partial zombie no rollback required", ObjectID);
_internalTransaction = null; // yukon zombification
}
else
{
ZombieCheck();
SqlStatistics statistics = null;
long scopeID = SqlClientEventSource.Log.ScopeEnterEvent("<sc.SqlTransaction.Rollback|API> {0}#", ObjectID);
SqlClientEventSource.Log.CorrelationTraceEvent("<sc.SqlTransaction.Rollback|API|Correlation> ObjectID {0}#, ActivityID {1}", ObjectID, ActivityCorrelator.Current.ToString());
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(_connection);
statistics = SqlStatistics.StartTimer(Statistics);
_isFromAPI = true;
_internalTransaction.Rollback();
}
#if DEBUG
finally
{
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException e)
{
_connection.Abort(e);
throw;
}
catch (System.StackOverflowException e)
{
_connection.Abort(e);
throw;
}
catch (System.Threading.ThreadAbortException e)
{
_connection.Abort(e);
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
finally
{
_isFromAPI = false;
SqlStatistics.StopTimer(statistics);
SqlClientEventSource.Log.ScopeLeaveEvent(scopeID);
}
}
}
////////////////////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
////////////////////////////////////////////////////////////////////////////////////////
/// <include file='..\..\..\..\..\..\..\doc\snippets\Microsoft.Data.SqlClient\SqlTransaction.xml' path='docs/members[@name="SqlTransaction"]/Commit/*' />
override public void Commit()
{
SqlConnection.ExecutePermission.Demand(); // MDAC 81476
ZombieCheck();
SqlStatistics statistics = null;
long scopeID = SqlClientEventSource.Log.ScopeEnterEvent("<sc.SqlTransaction.Commit|API> {0}#", ObjectID);
SqlClientEventSource.Log.CorrelationTraceEvent("<sc.SqlTransaction.Commit|API|Correlation> ObjectID {0}#, ActivityID {1}", ObjectID, ActivityCorrelator.Current.ToString());
TdsParser bestEffortCleanupTarget = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
bestEffortCleanupTarget = SqlInternalConnection.GetBestEffortCleanupTarget(_connection);
statistics = SqlStatistics.StartTimer(Statistics);
_isFromAPI = true;
_internalTransaction.Commit();
}
#if DEBUG
finally
{
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
catch (System.OutOfMemoryException e)
{
_connection.Abort(e);
throw;
}
catch (System.StackOverflowException e)
{
_connection.Abort(e);
throw;
}
catch (System.Threading.ThreadAbortException e)
{
_connection.Abort(e);
SqlInternalConnection.BestEffortCleanup(bestEffortCleanupTarget);
throw;
}
catch (SqlException e)
{
// GitHub Issue #130 - When a timeout exception has occurred on transaction completion request,
// this connection may not be in reusable state.
// We will abort this connection and make sure it does not go back to the pool.
var innerException = e.InnerException as Win32Exception;
if (innerException != null && innerException.NativeErrorCode == TdsEnums.SNI_WAIT_TIMEOUT)
{
_connection.Abort(e);
}
throw;
}
finally
{
_isFromAPI = false;
SqlStatistics.StopTimer(statistics);
SqlClientEventSource.Log.ScopeLeaveEvent(scopeID);
}
}
public void Initialize()
{
// if we get here, then we know for certain that we're the delegated
// transaction.
SqlInternalConnection connection = _connection;
SqlConnection usersConnection = connection.Connection;
Bid.Trace("<sc.SqlDelegatedTransaction.Initialize|RES|CPOOL> %d#, Connection %d#, delegating transaction.\n", ObjectID, connection.ObjectID);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
if (connection.IsEnlistedInTransaction)
{ // defect first
Bid.Trace("<sc.SqlDelegatedTransaction.Initialize|RES|CPOOL> %d#, Connection %d#, was enlisted, now defecting.\n", ObjectID, connection.ObjectID);
connection.EnlistNull();
}
_internalTransaction = new SqlInternalTransaction(connection, TransactionType.Delegated, null);
connection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Begin, null, _isolationLevel, _internalTransaction, true);
// Handle case where ExecuteTran didn't produce a new transaction, but also didn't throw.
if (null == connection.CurrentTransaction)
{
connection.DoomThisConnection();
throw ADP.InternalError(ADP.InternalErrorCode.UnknownTransactionFailure);
}
_active = true;
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
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;
}
}
public Byte[] Promote()
{
// Operations that might be affected by multi-threaded use MUST be done inside the lock.
// Don't read values off of the connection outside the lock unless it doesn't really matter
// from an operational standpoint (i.e. logging connection's ObjectID should be fine,
// but the PromotedDTCToken can change over calls. so that must be protected).
SqlInternalConnection connection = GetValidConnection();
Exception promoteException;
byte[] returnValue = null;
SqlConnection usersConnection = connection.Connection;
Bid.Trace("<sc.SqlDelegatedTransaction.Promote|RES|CPOOL> %d#, Connection %d#, promoting transaction.\n", ObjectID, connection.ObjectID);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
lock (connection)
{
try
{
// Now that we've acquired the lock, make sure we still have valid state for this operation.
ValidateActiveOnConnection(connection);
connection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Promote, null, IsolationLevel.Unspecified, _internalTransaction, true);
returnValue = _connection.PromotedDTCToken;
// For Global Transactions, we need to set the Transaction Id since we use a Non-MSDTC Promoter type.
if (_connection.IsGlobalTransaction)
{
if (SysTxForGlobalTransactions.SetDistributedTransactionIdentifier == null)
{
throw SQL.UnsupportedSysTxForGlobalTransactions();
}
if (!_connection.IsGlobalTransactionsEnabledForServer)
{
throw SQL.GlobalTransactionsNotEnabled();
}
SysTxForGlobalTransactions.SetDistributedTransactionIdentifier.Invoke(_atomicTransaction, new object[] { this, GetGlobalTxnIdentifierFromToken() });
}
promoteException = null;
}
catch (SqlException e)
{
promoteException = e;
ADP.TraceExceptionWithoutRethrow(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)
{
promoteException = e;
ADP.TraceExceptionWithoutRethrow(e);
connection.DoomThisConnection();
}
}
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
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;
}
if (promoteException != null)
{
throw SQL.PromotionFailed(promoteException);
}
return(returnValue);
}
// Called by transaction to initiate abort sequence
public void Rollback(SysTx.SinglePhaseEnlistment enlistment)
{
Debug.Assert(null != enlistment, "null enlistment?");
SqlInternalConnection connection = GetValidConnection();
SqlConnection usersConnection = connection.Connection;
Bid.Trace("<sc.SqlDelegatedTransaction.Rollback|RES|CPOOL> %d#, Connection %d#, aborting transaction.\n", ObjectID, connection.ObjectID);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
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 e)
{
ADP.TraceExceptionWithoutRethrow(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();
// 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 e)
{
ADP.TraceExceptionWithoutRethrow(e);
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();
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
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 the transaction to initiate commit sequence
public void SinglePhaseCommit(SysTx.SinglePhaseEnlistment enlistment)
{
Debug.Assert(null != enlistment, "null enlistment?");
SqlInternalConnection connection = GetValidConnection();
SqlConnection usersConnection = connection.Connection;
Bid.Trace("<sc.SqlDelegatedTransaction.SinglePhaseCommit|RES|CPOOL> %d#, Connection %d#, committing transaction.\n", ObjectID, connection.ObjectID);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if DEBUG
TdsParser.ReliabilitySection tdsReliabilitySection = new TdsParser.ReliabilitySection();
RuntimeHelpers.PrepareConstrainedRegions();
try {
tdsReliabilitySection.Start();
#else
{
#endif //DEBUG
// 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;
ADP.TraceExceptionWithoutRethrow(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;
ADP.TraceExceptionWithoutRethrow(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();
}
}
}
#if DEBUG
finally {
tdsReliabilitySection.Stop();
}
#endif //DEBUG
}
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;
}
}
