Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / PartitionResolver.cs / 1305376 / PartitionResolver.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web { using System; using System.Configuration; using System.Collections; using System.Threading; using System.IO; using System.Web; using System.Web.Caching; using System.Web.Util; using System.Data; using System.Data.SqlClient; using System.Text; using System.Security.Principal; using System.Xml; using System.Collections.Specialized; using System.Configuration.Provider; using System.Globalization; using System.Web.Management; using System.Web.Hosting; using System.Web.Configuration; using System.Security.Permissions; public interface IPartitionResolver { void Initialize(); string ResolvePartition(Object key); } internal interface IPartitionInfo { string GetTracingPartitionString(); } internal delegate IPartitionInfo CreatePartitionInfo(string connectionString); class PartitionManager : IDisposable { internal PartitionManager(CreatePartitionInfo createCallback) { _createCallback = createCallback; } HybridDictionary _partitions = new HybridDictionary(); ReaderWriterLock _lock = new ReaderWriterLock(); CreatePartitionInfo _createCallback; internal object GetPartition(IPartitionResolver partitionResolver, string id) { if (EtwTrace.IsTraceEnabled(EtwTraceLevel.Verbose, EtwTraceFlags.Infrastructure)) EtwTrace.Trace(EtwTraceType.ETW_TYPE_SESSIONSTATE_PARTITION_START, HttpContext.Current.WorkerRequest, partitionResolver.GetType().FullName, id); string partitionString = null; string errorMessage = null; IPartitionInfo partitionInfo = null; try { try { partitionString = partitionResolver.ResolvePartition(id); if (partitionString == null) { throw new HttpException( SR.GetString(SR.Bad_partition_resolver_connection_string, partitionResolver.GetType().FullName)); } } catch (Exception e) { errorMessage = e.Message; throw; } try { _lock.AcquireReaderLock(-1); partitionInfo = (IPartitionInfo)_partitions[partitionString]; if (partitionInfo != null) { Debug.Trace("PartitionManager", "id=" + id + "; partitionString=" + partitionString); return partitionInfo; } } finally { if (_lock.IsReaderLockHeld) { _lock.ReleaseReaderLock(); } } // Not found. Has to add it. try { _lock.AcquireWriterLock(-1); // One more time partitionInfo = (IPartitionInfo)_partitions[partitionString]; if (partitionInfo == null) { partitionInfo = _createCallback(partitionString); Debug.Trace("PartitionManager", "Add a new partition; id=" + id + "; partitionString=" + partitionString); _partitions.Add(partitionString, partitionInfo); } Debug.Trace("PartitionManager", "id=" + id + "; partitionString=" + partitionString); return partitionInfo; } finally { if (_lock.IsWriterLockHeld) { _lock.ReleaseWriterLock(); } } } finally { if (EtwTrace.IsTraceEnabled(EtwTraceLevel.Verbose, EtwTraceFlags.Infrastructure)) { string msg = errorMessage; if (msg == null) { if (partitionInfo != null) { msg = partitionInfo.GetTracingPartitionString(); } else { msg = String.Empty; } } EtwTrace.Trace(EtwTraceType.ETW_TYPE_SESSIONSTATE_PARTITION_END, HttpContext.Current.WorkerRequest, msg); } } } public void Dispose() { if (_partitions == null) { return; } try { _lock.AcquireWriterLock(-1); if (_partitions != null) { foreach (PartitionInfo partitionInfo in _partitions.Values) { partitionInfo.Dispose(); } _partitions = null; } } catch { // ignore exceptions in dispose } finally { if (_lock.IsWriterLockHeld) { _lock.ReleaseWriterLock(); } } } } internal class PartitionInfo : IDisposable, IPartitionInfo { ResourcePool _rpool; internal PartitionInfo(ResourcePool rpool) { _rpool = rpool; } internal object RetrieveResource() { return _rpool.RetrieveResource(); } internal void StoreResource(IDisposable o) { _rpool.StoreResource(o); } protected virtual string TracingPartitionString { get { return String.Empty; } } string IPartitionInfo.GetTracingPartitionString() { return TracingPartitionString; } public void Dispose() { if (_rpool == null) { return; } lock (this) { if (_rpool != null) { _rpool.Dispose(); _rpool = null; } } } }; } // 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
- StylusPointProperties.cs
- ToggleProviderWrapper.cs
- SignatureDescription.cs
- SchemaDeclBase.cs
- CategoryAttribute.cs
- DocumentManager.cs
- NullRuntimeConfig.cs
- DeclaredTypeElementCollection.cs
- XmlNodeReader.cs
- XslVisitor.cs
- Context.cs
- SimpleHandlerFactory.cs
- RSAPKCS1KeyExchangeDeformatter.cs
- UserControlParser.cs
- AsyncResult.cs
- DataControlFieldCell.cs
- ContentDisposition.cs
- RayMeshGeometry3DHitTestResult.cs
- SiteMapProvider.cs
- PersistenceTask.cs
- ProcessThread.cs
- BindingListCollectionView.cs
- RelationshipNavigation.cs
- TransformerInfo.cs
- AsyncCodeActivity.cs
- versioninfo.cs
- ConsoleTraceListener.cs
- BitmapCacheBrush.cs
- DefaultTraceListener.cs
- ProfileParameter.cs
- NetSectionGroup.cs
- MultiDataTrigger.cs
- DbConnectionStringBuilder.cs
- CmsUtils.cs
- ModelItemExtensions.cs
- GeometryHitTestParameters.cs
- SelectorAutomationPeer.cs
- SqlWriter.cs
- FontConverter.cs
- BindingContext.cs
- Queue.cs
- util.cs
- ConditionValidator.cs
- ChildDocumentBlock.cs
- WebPartMenu.cs
- UnmanagedBitmapWrapper.cs
- ExpressionBinding.cs
- ConfigXmlComment.cs
- EventWaitHandleSecurity.cs
- _Connection.cs
- sqlnorm.cs
- SizeValueSerializer.cs
- CreateUserWizardStep.cs
- PixelFormatConverter.cs
- TraceData.cs
- Dispatcher.cs
- ProfileService.cs
- EventListenerClientSide.cs
- FrameDimension.cs
- ConfigXmlSignificantWhitespace.cs
- TextEditorSelection.cs
- XmlNodeList.cs
- DataGridViewImageCell.cs
- TranslateTransform.cs
- XmlSchemaFacet.cs
- PeerSecurityManager.cs
- ArrayElementGridEntry.cs
- metadatamappinghashervisitor.cs
- HtmlTableCell.cs
- AtomMaterializerLog.cs
- FontFamilyValueSerializer.cs
- KeyedHashAlgorithm.cs
- ProxyGenerationError.cs
- DrawingDrawingContext.cs
- XmlTypeAttribute.cs
- DBBindings.cs
- DebugHandleTracker.cs
- Control.cs
- HttpRuntime.cs
- COMException.cs
- EntityDataSourceDesigner.cs
- CachedPathData.cs
- DesignDataSource.cs
- ProcessModelSection.cs
- RequestTimeoutManager.cs
- _ContextAwareResult.cs
- ISFClipboardData.cs
- OperatingSystemVersionCheck.cs
- TypeUnloadedException.cs
- sapiproxy.cs
- BindingsSection.cs
- DisableDpiAwarenessAttribute.cs
- CodeNamespace.cs
- XmlDocumentFragment.cs
- SQLBinaryStorage.cs
- _NegoStream.cs
- HtmlForm.cs
- RegisteredArrayDeclaration.cs
- PageParserFilter.cs
- CacheEntry.cs