Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Server / System / Data / Services / UpdateTracker.cs / 1305376 / UpdateTracker.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // //// Provides a class used to track updates for callbacks. // // // @owner [....] //--------------------------------------------------------------------- namespace System.Data.Services { using System.Collections.Generic; using System.Data.Services.Providers; using System.Diagnostics; using System.Reflection; ///Provides a class used to track updates for callbacks. internal class UpdateTracker { #region Private fields. ////// A dictionary of containers mapping to the changes on those /// containers, each of which consists of an element and the /// action taken on it. /// private Dictionary> items; /// Underlying data service instance. private IDataService service; #endregion Private fields. ///Initializes a new /// underlying data source instance. private UpdateTracker(IDataService service) { this.service = service; this.items = new Dictionaryinstance. >(ReferenceEqualityComparer .Instance); } /// Fires the notification for a single action. /// Service on which methods should be invoked. /// Object to be tracked. /// Container in which object is changed. /// Action affecting target. internal static void FireNotification(IDataService service, object target, ResourceSetWrapper container, UpdateOperations action) { Debug.Assert(service != null, "service != null"); AssertActionValues(target, container); MethodInfo[] methods = container.ChangeInterceptors; if (methods != null) { object[] parameters = new object[2]; parameters[0] = target; parameters[1] = action; for (int i = 0; i < methods.Length; i++) { try { methods[i].Invoke(service.Instance, parameters); } catch (TargetInvocationException exception) { ErrorHandler.HandleTargetInvocationException(exception); throw; } } } } ////// Create a new instance of update tracker /// /// underlying data service. ////// Returns a new instance of UpdateTracker. /// internal static UpdateTracker CreateUpdateTracker(IDataService service) { return new UpdateTracker(service); } ///Fires all notifications internal void FireNotifications() { object[] parameters = new object[2]; foreach (var item in this.items) { MethodInfo[] methods = item.Key.ChangeInterceptors; Debug.Assert(methods != null, "methods != null - should not have been tracking changes to the container otherwise."); foreach (var element in item.Value) { parameters[0] = this.service.Updatable.ResolveResource(element.Key); parameters[1] = element.Value; for (int i = 0; i < methods.Length; i++) { try { methods[i].Invoke(this.service.Instance, parameters); } catch (TargetInvocationException exception) { ErrorHandler.HandleTargetInvocationException(exception); throw; } } } // Make elements elegible for garbage collection. item.Value.Clear(); } // Make dictionary elegible for garbage collection. this.items = null; } ////// Tracks the specified /// Object to be tracked. /// Container in which object is changed. /// Action affecting target. ///for a /// given on the . /// /// If internal void TrackAction(object target, ResourceSetWrapper container, UpdateOperations action) { AssertActionValues(target, container); Debug.Assert(this.items != null, "this.items != null - otherwise FireNotification has already been called"); // If it won't be necessary for us to fire authorizatio methods, // skip tracking altogether. if (container.ChangeInterceptors == null) { return; } // Get the container for which the change has taken place. Dictionarywas already being tracked, the actions are OR'ed together. ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ImageCodecInfoPrivate.cs
- SmiContext.cs
- PageParser.cs
- ArcSegment.cs
- EdgeModeValidation.cs
- Point3DAnimationBase.cs
- DesignerPerfEventProvider.cs
- SystemColorTracker.cs
- LinkArea.cs
- TextReturnReader.cs
- HtmlDocument.cs
- QilScopedVisitor.cs
- ImageButton.cs
- CssTextWriter.cs
- DesignSurfaceManager.cs
- HttpChannelBindingToken.cs
- ADMembershipProvider.cs
- ProfileManager.cs
- StorageRoot.cs
- IndependentAnimationStorage.cs
- VerificationAttribute.cs
- HybridDictionary.cs
- InfoCardArgumentException.cs
- DurationConverter.cs
- thaishape.cs
- CategoryAttribute.cs
- PowerStatus.cs
- SqlFunctionAttribute.cs
- SqlTransaction.cs
- EntityTypeBase.cs
- FaultContext.cs
- TraceLog.cs
- DPCustomTypeDescriptor.cs
- IChannel.cs
- PagerSettings.cs
- GlobalProxySelection.cs
- CompoundFileStorageReference.cs
- NavigationWindowAutomationPeer.cs
- ListenerBinder.cs
- CollectionChangeEventArgs.cs
- EditingCommands.cs
- ZipPackagePart.cs
- MissingMemberException.cs
- RectAnimationUsingKeyFrames.cs
- SchemaHelper.cs
- PageCodeDomTreeGenerator.cs
- RepeaterDesigner.cs
- BasicViewGenerator.cs
- InvalidPrinterException.cs
- MeshGeometry3D.cs
- NameObjectCollectionBase.cs
- CodeTypeDeclaration.cs
- Authorization.cs
- XamlSerializationHelper.cs
- MessageVersionConverter.cs
- Semaphore.cs
- CustomError.cs
- LocalizationParserHooks.cs
- DefaultAssemblyResolver.cs
- FixedSOMPageConstructor.cs
- Compiler.cs
- GeneratedView.cs
- EmptyStringExpandableObjectConverter.cs
- UTF8Encoding.cs
- GeneralTransform3DGroup.cs
- Queue.cs
- WebBrowserDocumentCompletedEventHandler.cs
- DataGridViewBand.cs
- DrawingAttributes.cs
- ParagraphVisual.cs
- DefaultEvaluationContext.cs
- AppSettingsExpressionEditor.cs
- SharedUtils.cs
- PrintingPermissionAttribute.cs
- SafeRightsManagementQueryHandle.cs
- InternalMappingException.cs
- UpdatePanel.cs
- GlyphManager.cs
- HTTPNotFoundHandler.cs
- WmlPageAdapter.cs
- ComponentDispatcherThread.cs
- WindowCollection.cs
- TemplateBuilder.cs
- MessageBox.cs
- BypassElement.cs
- CacheForPrimitiveTypes.cs
- ProgressBar.cs
- CodeSubDirectoriesCollection.cs
- HGlobalSafeHandle.cs
- NamespaceListProperty.cs
- ToolboxItemCollection.cs
- SelectedDatesCollection.cs
- WhitespaceRuleLookup.cs
- DashStyle.cs
- MenuItem.cs
- BitArray.cs
- SecureConversationServiceCredential.cs
- XPathParser.cs
- OrderPreservingMergeHelper.cs
- Inflater.cs