internal OletxTransactionManager( string nodeName ) { lock ( ClassSyncObject ) { // If we have not already initialized the shim factory and started the notification // thread, do so now. if (null == OletxTransactionManager.proxyShimFactory) { Int32 error = NativeMethods.GetNotificationFactory( OletxTransactionManager.ShimWaitHandle.SafeWaitHandle, out OletxTransactionManager.proxyShimFactory ); if (0 != error) { throw TransactionException.Create(SR.GetString(SR.TraceSourceOletx), SR.GetString(SR.UnableToGetNotificationShimFactory), null); } ThreadPool.UnsafeRegisterWaitForSingleObject( OletxTransactionManager.ShimWaitHandle, new WaitOrTimerCallback(OletxTransactionManager.ShimNotificationCallback), null, -1, false ); } } this.dtcTransactionManagerLock = new ReaderWriterLock(); this.nodeNameField = nodeName; // The DTC proxy doesn't like an empty string for node name on 64-bit platforms when // running as WOW64. It treats any non-null node name as a "remote" node and turns off // the WOW64 bit, causing problems when reading the registry. So if we got on empty // string for the node name, just treat it as null. if ((null != this.nodeNameField) && (0 == this.nodeNameField.Length)) { this.nodeNameField = null; } if (DiagnosticTrace.Verbose) { DistributedTransactionManagerCreatedTraceRecord.Trace(SR.GetString(SR.TraceSourceOletx), this.GetType(), this.nodeNameField ); } // Initialize the properties from config. configuredTransactionOptions.IsolationLevel = isolationLevelProperty = TransactionManager.DefaultIsolationLevel; configuredTransactionOptions.Timeout = timeoutProperty = TransactionManager.DefaultTimeout; this.internalResourceManager = new OletxInternalResourceManager(this); dtcTransactionManagerLock.AcquireWriterLock(-1); try { this.dtcTransactionManager = new DtcTransactionManager(this.nodeNameField, this); } finally { dtcTransactionManagerLock.ReleaseWriterLock(); } if (resourceManagerHashTable == null) { resourceManagerHashTable = new Hashtable(2); resourceManagerHashTableLock = new System.Threading.ReaderWriterLock(); } }
internal OletxCommittableTransaction CreateTransaction( TransactionOptions properties ) { OletxCommittableTransaction tx = null; RealOletxTransaction realTransaction = null; ITransactionShim transactionShim = null; Guid txIdentifier = Guid.Empty; OutcomeEnlistment outcomeEnlistment = null; // Demand the distributed transation permission to create one of // these. DistributedTransactionPermission txPerm = new DistributedTransactionPermission(PermissionState.Unrestricted); txPerm.Demand(); TransactionManager.ValidateIsolationLevel(properties.IsolationLevel); // Never create a transaction with an IsolationLevel of Unspecified. if (IsolationLevel.Unspecified == properties.IsolationLevel) { properties.IsolationLevel = configuredTransactionOptions.IsolationLevel; } properties.Timeout = TransactionManager.ValidateTimeout(properties.Timeout); this.dtcTransactionManagerLock.AcquireReaderLock(-1); try { // OletxTransactionIsolationLevel oletxIsoLevel = OletxTransactionManager.ConvertIsolationLevel(properties.IsolationLevel); UInt32 oletxTimeout = DtcTransactionManager.AdjustTimeout(properties.Timeout); outcomeEnlistment = new OutcomeEnlistment(); IntPtr outcomeEnlistmentHandle = IntPtr.Zero; RuntimeHelpers.PrepareConstrainedRegions(); try { outcomeEnlistmentHandle = HandleTable.AllocHandle(outcomeEnlistment); dtcTransactionManager.ProxyShimFactory.BeginTransaction( oletxTimeout, oletxIsoLevel, outcomeEnlistmentHandle, out txIdentifier, out transactionShim ); } catch (COMException ex) { OletxTransactionManager.ProxyException(ex); throw; } finally { if (transactionShim == null && outcomeEnlistmentHandle != IntPtr.Zero) { HandleTable.FreeHandle(outcomeEnlistmentHandle); } } realTransaction = new RealOletxTransaction( this, transactionShim, outcomeEnlistment, txIdentifier, oletxIsoLevel, true ); tx = new OletxCommittableTransaction(realTransaction); if (DiagnosticTrace.Information) { TransactionCreatedTraceRecord.Trace(SR.GetString(SR.TraceSourceOletx), tx.TransactionTraceId ); } } finally { this.dtcTransactionManagerLock.ReleaseReaderLock(); } return(tx); }
internal OletxTransactionManager( string nodeName ) { lock ( ClassSyncObject ) { // If we have not already initialized the shim factory and started the notification // thread, do so now. if (null == OletxTransactionManager.proxyShimFactory ) { Int32 error = NativeMethods.GetNotificationFactory( OletxTransactionManager.ShimWaitHandle.SafeWaitHandle, out OletxTransactionManager.proxyShimFactory ); if ( 0 != error ) { throw TransactionException.Create( SR.GetString( SR.TraceSourceOletx ), SR.GetString( SR.UnableToGetNotificationShimFactory ), null ); } ThreadPool.UnsafeRegisterWaitForSingleObject( OletxTransactionManager.ShimWaitHandle, new WaitOrTimerCallback( OletxTransactionManager.ShimNotificationCallback ), null, -1, false ); } } this.dtcTransactionManagerLock = new ReaderWriterLock(); this.nodeNameField = nodeName; // The DTC proxy doesn't like an empty string for node name on 64-bit platforms when // running as WOW64. It treats any non-null node name as a "remote" node and turns off // the WOW64 bit, causing problems when reading the registry. So if we got on empty // string for the node name, just treat it as null. if (( null != this.nodeNameField ) && ( 0 == this.nodeNameField.Length )) { this.nodeNameField = null; } if ( DiagnosticTrace.Verbose ) { DistributedTransactionManagerCreatedTraceRecord.Trace( SR.GetString( SR.TraceSourceOletx ), this.GetType(), this.nodeNameField ); } // Initialize the properties from config. configuredTransactionOptions.IsolationLevel = isolationLevelProperty = TransactionManager.DefaultIsolationLevel; configuredTransactionOptions.Timeout = timeoutProperty = TransactionManager.DefaultTimeout; this.internalResourceManager = new OletxInternalResourceManager( this ); dtcTransactionManagerLock.AcquireWriterLock( -1 ); try { this.dtcTransactionManager = new DtcTransactionManager( this.nodeNameField, this ); } finally { dtcTransactionManagerLock.ReleaseWriterLock(); } if (resourceManagerHashTable == null) { resourceManagerHashTable = new Hashtable(2); resourceManagerHashTableLock = new System.Threading.ReaderWriterLock(); } }