static internal void BestEffortCleanup(TdsParser target)
{
if (null != target)
{
target.BestEffortCleanup();
}
}
private int _freeStateObjectCount; // Number of available free sessions
internal TdsParserSessionPool(TdsParser parser)
{
_parser = parser;
_cache = new List <TdsParserStateObject>();
_freeStateObjects = new TdsParserStateObject[MaxInactiveCount];
_freeStateObjectCount = 0;
}
private int _freeStateObjectCount; // Number of available free sessions
internal TdsParserSessionPool(TdsParser parser)
{
_parser = parser;
_cache = new List <TdsParserStateObject>();
_freeStateObjects = new TdsParserStateObject[MaxInactiveCount];
_freeStateObjectCount = 0;
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.TdsParserSessionPool.ctor|ADV> {0} created session pool for parser {1}", ObjectID, parser.ObjectID);
}
////////////////////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
////////////////////////////////////////////////////////////////////////////////////////
override public void Commit()
{
SqlConnection.ExecutePermission.Demand(); // MDAC 81476
ZombieCheck();
SqlStatistics statistics = null;
IntPtr hscp;
Bid.ScopeEnter(out hscp, "<sc.SqlTransaction.Commit|API> %d#", ObjectID);
Bid.CorrelationTrace("<sc.SqlTransaction.Commit|API|Correlation> ObjectID%d#, ActivityID %ls", 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);
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;
}
finally {
_isFromAPI = false;
SqlStatistics.StopTimer(statistics);
Bid.ScopeLeave(ref hscp);
}
}
/// <include file='..\..\..\..\..\..\..\doc\snippets\Microsoft.Data.SqlClient\SqlTransaction.xml' path='docs/members[@name="SqlTransaction"]/Save/*' />
public void Save(string savePointName)
{
SqlConnection.ExecutePermission.Demand(); // MDAC 81476
ZombieCheck();
SqlStatistics statistics = null;
long scopeID = SqlClientEventSource.Log.ScopeEnterEvent("<sc.SqlTransaction.Save|API> {0}# savePointName='{1}'", ObjectID, savePointName);
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);
_internalTransaction.Save(savePointName);
}
#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);
SqlClientEventSource.Log.ScopeLeaveEvent(scopeID);
}
}
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;
}
}
/// <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;
}
}
internal TdsParserStateObject CreateSessionObject(TdsParser tdsParser, TdsParserStateObject _pMarsPhysicalConObj, bool v)
{
if (TdsParserStateObjectFactory.UseManagedSNI)
{
return(new TdsParserStateObjectManaged(tdsParser, _pMarsPhysicalConObj, true));
}
else
{
return(new TdsParserStateObjectNative(tdsParser, _pMarsPhysicalConObj, true));
}
}
public TdsParserStateObject CreateTdsParserStateObject(TdsParser parser)
{
if (UseManagedSNI)
{
return(new TdsParserStateObjectManaged(parser));
}
else
{
return(new TdsParserStateObjectNative(parser));
}
}
private int _freeStateObjectCount; // Number of available free sessions
internal TdsParserSessionPool(TdsParser parser)
{
_parser = parser;
_cache = new List <TdsParserStateObject>();
_freeStateObjects = new TdsParserStateObject[MaxInactiveCount];
_freeStateObjectCount = 0;
if (Bid.AdvancedOn)
{
Bid.Trace("<sc.TdsParserSessionPool.ctor|ADV> %d# created session pool for parser %d\n", ObjectID, parser.ObjectID);
}
}
override internal void ValidateConnectionForExecute(SqlCommand command)
{
SqlDataReader reader = FindLiveReader(null);
if (null != reader)
{
// if MARS is on, then a datareader associated with the command exists
// or if MARS is off, then a datareader exists
TdsParser parser = command.Connection.Parser;
throw ADP.OpenReaderExists(parser.MARSOn); // MDAC 66411
}
}
// Reads off from the network buffer and caches bytes. Only reads one column value in the current row.
static internal bool TryCreate(SqlMetaDataPriv metadata, TdsParser parser, TdsParserStateObject stateObj, out SqlCachedBuffer buffer)
{
int cb = 0;
ulong plplength;
byte[] byteArr;
List <byte[]> cachedBytes = new List <byte[]>();
buffer = null;
// the very first length is already read.
if (!parser.TryPlpBytesLeft(stateObj, out plplength))
{
return(false);
}
// For now we only handle Plp data from the parser directly.
Debug.Assert(metadata.metaType.IsPlp, "SqlCachedBuffer call on a non-plp data");
do
{
if (plplength == 0)
{
break;
}
do
{
cb = (plplength > (ulong)_maxChunkSize) ? _maxChunkSize : (int)plplength;
byteArr = new byte[cb];
if (!stateObj.TryReadPlpBytes(ref byteArr, 0, cb, out cb))
{
return(false);
}
Debug.Assert(cb == byteArr.Length);
if (cachedBytes.Count == 0)
{
// Add the Byte order mark if needed if we read the first array
AddByteOrderMark(byteArr, cachedBytes);
}
cachedBytes.Add(byteArr);
plplength -= (ulong)cb;
} while (plplength > 0);
if (!parser.TryPlpBytesLeft(stateObj, out plplength))
{
return(false);
}
} while (plplength > 0);
Debug.Assert(stateObj._longlen == 0 && stateObj._longlenleft == 0);
buffer = new SqlCachedBuffer(cachedBytes);
return(true);
}
/// <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);
}
public TdsParserStateObject CreateTdsParserStateObject(TdsParser parser)
{
if (UseManagedSNI)
{
SqlClientEventSource.Log.TryTraceEvent("TdsParserStateObjectFactory.CreateTdsParserStateObject | Info | Found AppContext switch '{0}' enabled, managed networking implementation will be used."
, UseManagedNetworkingOnWindows);
return(new TdsParserStateObjectManaged(parser));
}
else
{
SqlClientEventSource.Log.TryTraceEvent("TdsParserStateObjectFactory.CreateTdsParserStateObject | Info | AppContext switch '{0}' not enabled, native networking implementation will be used."
, UseManagedNetworkingOnWindows);
return(new TdsParserStateObjectNative(parser));
}
}
public TdsParserStateObject CreateTdsParserStateObject(TdsParser parser)
{
return(new TdsParserStateObjectManaged(parser));
}
/// <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);
}
}
/// <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
if (Bid.AdvancedOn)
{
Bid.Trace("<sc.SqlTransaction.Rollback|ADV> %d# partial zombie no rollback required\n", ObjectID);
}
_internalTransaction = null; // yukon zombification
}
else
{
ZombieCheck();
SqlStatistics statistics = null;
IntPtr hscp;
Bid.ScopeEnter(out hscp, "<sc.SqlTransaction.Rollback|API> %d#", ObjectID);
Bid.CorrelationTrace("<sc.SqlTransaction.Rollback|API|Correlation> ObjectID%d#, ActivityID %ls\n", 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);
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);
Bid.ScopeLeave(ref hscp);
}
}
}
private void EnlistNonNull(SysTx.Transaction tx)
{
Debug.Assert(null != tx, "null transaction?");
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.SqlInternalConnection.EnlistNonNull|ADV> {0}, transaction {1}.", ObjectID, tx.GetHashCode());
bool hasDelegatedTransaction = false;
if (Is2005OrNewer)
{
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.SqlInternalConnection.EnlistNonNull|ADV> {0}, attempting to delegate", ObjectID);
// Promotable transactions are only supported on 2005
// servers or newer.
SqlDelegatedTransaction delegatedTransaction = new SqlDelegatedTransaction(this, tx);
try
{
// NOTE: System.Transactions claims to resolve all
// potential race conditions between multiple delegate
// requests of the same transaction to different
// connections in their code, such that only one
// attempt to delegate will succeed.
// NOTE: PromotableSinglePhaseEnlist will eventually
// make a round trip to the server; doing this inside
// a lock is not the best choice. We presume that you
// aren't trying to enlist concurrently on two threads
// and leave it at that -- We don't claim any thread
// safety with regard to multiple concurrent requests
// to enlist the same connection in different
// transactions, which is good, because we don't have
// it anyway.
// PromotableSinglePhaseEnlist may not actually promote
// the transaction when it is already delegated (this is
// the way they resolve the race condition when two
// threads attempt to delegate the same Lightweight
// Transaction) In that case, we can safely ignore
// our delegated transaction, and proceed to enlist
// in the promoted one.
// NOTE: Global Transactions is an Azure SQL DB only
// feature where the Transaction Manager (TM) is not
// MS-DTC. Sys.Tx added APIs to support Non MS-DTC
// promoter types/TM in .NET 4.6.1. Following directions
// from .NETFX shiproom, to avoid a "hard-dependency"
// (compile time) on Sys.Tx, we use reflection to invoke
// the new APIs. Further, the _isGlobalTransaction flag
// indicates that this is an Azure SQL DB Transaction
// that could be promoted to a Global Transaction (it's
// always false for on-prem Sql Server). The Promote()
// call in SqlDelegatedTransaction makes sure that the
// right Sys.Tx.dll is loaded and that Global Transactions
// are actually allowed for this Azure SQL DB.
if (_isGlobalTransaction)
{
if (SysTxForGlobalTransactions.EnlistPromotableSinglePhase == null)
{
// This could be a local Azure SQL DB transaction.
hasDelegatedTransaction = tx.EnlistPromotableSinglePhase(delegatedTransaction);
}
else
{
hasDelegatedTransaction = (bool)SysTxForGlobalTransactions.EnlistPromotableSinglePhase.Invoke(tx, new object[] { delegatedTransaction, _globalTransactionTMID });
}
}
else
{
// This is an MS-DTC distributed transaction
hasDelegatedTransaction = tx.EnlistPromotableSinglePhase(delegatedTransaction);
}
if (hasDelegatedTransaction)
{
this.DelegatedTransaction = delegatedTransaction;
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.SqlInternalConnection.EnlistNonNull|ADV> {0}, delegated to transaction {1} with transactionId=0x{2}", ObjectID, null != CurrentTransaction ? CurrentTransaction.ObjectID : 0, null != CurrentTransaction ? CurrentTransaction.TransactionId : SqlInternalTransaction.NullTransactionId);
}
}
catch (SqlException e)
{
// we do not want to eat the error if it is a fatal one
if (e.Class >= TdsEnums.FATAL_ERROR_CLASS)
{
throw;
}
// if the parser is null or its state is not openloggedin, the connection is no longer good.
SqlInternalConnectionTds tdsConnection = this as SqlInternalConnectionTds;
if (tdsConnection != null)
{
TdsParser parser = tdsConnection.Parser;
if (parser == null || parser.State != TdsParserState.OpenLoggedIn)
{
throw;
}
}
ADP.TraceExceptionWithoutRethrow(e);
// In this case, SqlDelegatedTransaction.Initialize
// failed and we don't necessarily want to reject
// things -- there may have been a legitimate reason
// for the failure.
}
}
if (!hasDelegatedTransaction)
{
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.SqlInternalConnection.EnlistNonNull|ADV> {0}, delegation not possible, enlisting.", ObjectID);
byte[] cookie = null;
if (_isGlobalTransaction)
{
if (SysTxForGlobalTransactions.GetPromotedToken == null)
{
throw SQL.UnsupportedSysTxForGlobalTransactions();
}
cookie = (byte[])SysTxForGlobalTransactions.GetPromotedToken.Invoke(tx, null);
}
else
{
if (null == _whereAbouts)
{
byte[] dtcAddress = GetDTCAddress();
if (null == dtcAddress)
{
throw SQL.CannotGetDTCAddress();
}
_whereAbouts = dtcAddress;
}
cookie = GetTransactionCookie(tx, _whereAbouts);
}
// send cookie to server to finish enlistment
PropagateTransactionCookie(cookie);
_isEnlistedInTransaction = true;
SqlClientEventSource.Log.TryAdvancedTraceEvent("<sc.SqlInternalConnection.EnlistNonNull|ADV> {0}, enlisted with transaction {1} with transactionId=0x{2}", ObjectID, null != CurrentTransaction ? CurrentTransaction.ObjectID : 0, null != CurrentTransaction ? CurrentTransaction.TransactionId : SqlInternalTransaction.NullTransactionId);
}
EnlistedTransaction = tx; // Tell the base class about our enlistment
// If we're on a 2005 or newer server, and we we delegate the
// transaction successfully, we will have done a begin transaction,
// which produces a transaction id that we should execute all requests
// on. The TdsParser or SmiEventSink will store this information as
// the current transaction.
//
// Likewise, propagating a transaction to a 2005 or newer server will
// produce a transaction id that The TdsParser or SmiEventSink will
// store as the current transaction.
//
// In either case, when we're working with a 2005 or newer server
// we better have a current transaction by now.
Debug.Assert(!Is2005OrNewer || null != CurrentTransaction, "delegated/enlisted transaction with null current transaction?");
}
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);
}
}
private readonly WritePacketCache _writePacketCache = new WritePacketCache(); // Store write packets that are ready to be re-used
public TdsParserStateObjectNative(TdsParser parser) : base(parser)
{
}
private Dictionary <IntPtr, SNIPacket> _pendingWritePackets = new Dictionary <IntPtr, SNIPacket>(); // Stores write packets that have been sent to SNI, but have not yet finished writing (i.e. we are waiting for SNI's callback)
internal TdsParserStateObjectNative(TdsParser parser, TdsParserStateObject physicalConnection, bool async) :
base(parser, physicalConnection, async)
{
}
internal TdsParserStateObject CreateSessionObject(TdsParser tdsParser, TdsParserStateObject _pMarsPhysicalConObj, bool v)
{
return(new TdsParserStateObjectManaged(tdsParser, _pMarsPhysicalConObj, true));
}
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"]/RollbackTransactionName/*' />
public void Rollback(string transactionName)
{
SqlConnection.ExecutePermission.Demand(); // MDAC 81476
ZombieCheck();
SqlStatistics statistics = null;
using (TryEventScope.Create("<sc.SqlTransaction.Rollback|API> {0} transactionName='{1}'", 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);
}
}
}
