Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.ServiceModel.Activities / System / ServiceModel / Activities / Dispatcher / transactioncontext.cs / 1305376 / transactioncontext.cs
//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.ServiceModel.Activities.Dispatcher { using System.Runtime; using System.Transactions; //1) On Tx.Prepare // Persist the instance. // When Persist completes Tx.Prepared called. // When Persist fails Tx.ForceRollback called. //2) On Tx.Commit // DurableInstance.OnTransactionCompleted(). //3) On Tx.Abort // DurableInstance.OnTransactionAborted() class TransactionContext : IEnlistmentNotification { static AsyncCallback handleEndPrepare = Fx.ThunkCallback(new AsyncCallback(HandleEndPrepare)); Transaction currentTransaction; WorkflowServiceInstance durableInstance; public TransactionContext(WorkflowServiceInstance durableInstance, Transaction currentTransaction) { Fx.Assert(durableInstance != null, "Null DurableInstance passed to TransactionContext."); Fx.Assert(currentTransaction != null, "Null Transaction passed to TransactionContext."); this.currentTransaction = currentTransaction.Clone(); this.durableInstance = durableInstance; this.currentTransaction.EnlistVolatile(this, EnlistmentOptions.EnlistDuringPrepareRequired); } public Transaction CurrentTransaction { get { return this.currentTransaction; } } void IEnlistmentNotification.Commit(Enlistment enlistment) { enlistment.Done(); this.durableInstance.TransactionCommitted(); } void IEnlistmentNotification.InDoubt(Enlistment enlistment) { enlistment.Done(); Fx.Assert(this.currentTransaction.TransactionInformation.Status == TransactionStatus.InDoubt, "Transaction state should be InDoubt at this point"); TransactionException exception = this.GetAbortedOrInDoubtTransactionException(); Fx.Assert(exception != null, "Need a valid TransactionException at this point"); this.durableInstance.OnTransactionAbortOrInDoubt(exception); } void IEnlistmentNotification.Prepare(PreparingEnlistment preparingEnlistment) { bool success = false; try { IAsyncResult result = new PrepareAsyncResult(this, TransactionContext.handleEndPrepare, preparingEnlistment); if (result.CompletedSynchronously) { PrepareAsyncResult.End(result); preparingEnlistment.Prepared(); } success = true; } //we need to swollow the TransactionException as it could because another party aborting it catch (TransactionException) {} finally { if (!success) { preparingEnlistment.ForceRollback(); } } } void IEnlistmentNotification.Rollback(Enlistment enlistment) { enlistment.Done(); Fx.Assert(this.currentTransaction.TransactionInformation.Status == TransactionStatus.Aborted,"Transaction state should be Aborted at this point"); TransactionException exception = this.GetAbortedOrInDoubtTransactionException(); Fx.Assert(exception != null, "Need a valid TransactionException at this point"); this.durableInstance.OnTransactionAbortOrInDoubt(exception); } TransactionException GetAbortedOrInDoubtTransactionException() { try { Fx.ThrowIfTransactionAbortedOrInDoubt(this.currentTransaction); } catch (TransactionException exception) { return exception; } return null; } static void HandleEndPrepare(IAsyncResult result) { PreparingEnlistment preparingEnlistment = (PreparingEnlistment)result.AsyncState; bool success = false; try { if (!result.CompletedSynchronously) { PrepareAsyncResult.End(result); preparingEnlistment.Prepared(); } success = true; } //we need to swollow the TransactionException as it could because another party aborting it catch (TransactionException) {} finally { if (!success) { preparingEnlistment.ForceRollback(); } } } class PrepareAsyncResult : AsyncResult { static readonly AsyncCompletion onEndPersist = new AsyncCompletion(OnEndPersist); readonly TransactionContext context; public PrepareAsyncResult(TransactionContext context, AsyncCallback callback, object state) : base(callback, state) { this.context = context; IAsyncResult result = null; using (PrepareTransactionalCall(this.context.currentTransaction)) { result = this.context.durableInstance.BeginPersist(TimeSpan.MaxValue, PrepareAsyncCompletion(PrepareAsyncResult.onEndPersist), this); } if (SyncContinue(result)) { Complete(true); } } public static void End(IAsyncResult result) { AsyncResult.End(result); } static bool OnEndPersist(IAsyncResult result) { PrepareAsyncResult thisPtr = (PrepareAsyncResult)result.AsyncState; thisPtr.context.durableInstance.EndPersist(result); thisPtr.context.durableInstance.OnTransactionPrepared(); return true; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- GrabHandleGlyph.cs
- RelationshipFixer.cs
- CodeAccessPermission.cs
- WindowsBrush.cs
- AudioFormatConverter.cs
- XmlSerializerVersionAttribute.cs
- ObjectSet.cs
- FlowDocument.cs
- DataTableNewRowEvent.cs
- safelinkcollection.cs
- GeometryGroup.cs
- UrlAuthorizationModule.cs
- CodeDOMProvider.cs
- InternalConfigHost.cs
- DataGridViewAutoSizeColumnsModeEventArgs.cs
- RemoteWebConfigurationHostStream.cs
- InputScopeManager.cs
- SqlVersion.cs
- List.cs
- SoapAttributeOverrides.cs
- VariableExpressionConverter.cs
- PiiTraceSource.cs
- DefaultPropertyAttribute.cs
- PartialTrustVisibleAssembliesSection.cs
- ReservationNotFoundException.cs
- CustomAttributeFormatException.cs
- ContentElement.cs
- DiscreteKeyFrames.cs
- ReplyChannel.cs
- ProjectedSlot.cs
- ProviderSettingsCollection.cs
- SetIterators.cs
- DataKeyCollection.cs
- BamlResourceContent.cs
- DependencyPropertyConverter.cs
- WebPartConnectionsCancelVerb.cs
- GetWinFXPath.cs
- ButtonBase.cs
- XMLSchema.cs
- ResourcePermissionBaseEntry.cs
- PointCollectionValueSerializer.cs
- SettingsPropertyCollection.cs
- ToolstripProfessionalRenderer.cs
- ChannelServices.cs
- tibetanshape.cs
- AnimationException.cs
- TreeNodeConverter.cs
- SchemaCollectionCompiler.cs
- XmlWrappingReader.cs
- UdpDuplexChannel.cs
- XpsResourcePolicy.cs
- DownloadProgressEventArgs.cs
- FileUtil.cs
- DataPointer.cs
- ComponentResourceKey.cs
- Inline.cs
- ProxyRpc.cs
- ResolveNameEventArgs.cs
- ConfigXmlText.cs
- Mapping.cs
- GcSettings.cs
- DockPanel.cs
- HostVisual.cs
- InfiniteIntConverter.cs
- PropertyTabChangedEvent.cs
- TrackingMemoryStreamFactory.cs
- ResourcePool.cs
- Int32CollectionConverter.cs
- ContainerFilterService.cs
- MSG.cs
- LassoHelper.cs
- XNodeValidator.cs
- OutputScopeManager.cs
- SqlUdtInfo.cs
- QuadraticBezierSegment.cs
- XslVisitor.cs
- WindowsGraphics2.cs
- ADMembershipUser.cs
- DropDownList.cs
- TileBrush.cs
- RadioButtonRenderer.cs
- XmlWrappingWriter.cs
- Journal.cs
- MultiPropertyDescriptorGridEntry.cs
- GenerateHelper.cs
- WebServiceResponse.cs
- XPathScanner.cs
- ResourceCodeDomSerializer.cs
- ContentControl.cs
- PrePostDescendentsWalker.cs
- ToolStripHighContrastRenderer.cs
- ClientCultureInfo.cs
- CodeCatchClause.cs
- StrongNameSignatureInformation.cs
- MsmqOutputChannel.cs
- ControlPager.cs
- remotingproxy.cs
- TextBreakpoint.cs
- SchemaInfo.cs
- InkCollectionBehavior.cs