Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / Net / Cache / RequestCache.cs / 1305376 / RequestCache.cs
/*++ Copyright (c) Microsoft Corporation Module Name: RequestCache.cs Abstract: The file specifies interfaces used to communicate with Request Caching subsystem. Author: Alexei Vopilov 21-Dec-2002 Revision History: Jan 25 2004 - Changed the visibility of the class from public to internal. --*/ namespace System.Net.Cache { using System; using System.Diagnostics; using System.Text; using System.IO; using System.Collections.Specialized; using System.Threading; // The class specifies the contract for a caching storage to participate in the caching protocol. // The required functionality is to retrieve cached data and update cache based on a string as a Key. // It is also assumed that cache does storage quota management so it can remove expired cached entries under limited space conditions. // Note that no implementation methods should block as there is no Async API exposed by this type. internal abstract class RequestCache { internal static readonly char[] LineSplits = new char[] {'\r','\n'}; private bool _IsPrivateCache; private bool _CanWrite; protected RequestCache( bool isPrivateCache, bool canWrite) { _IsPrivateCache = isPrivateCache; _CanWrite = canWrite; } internal bool IsPrivateCache {get {return _IsPrivateCache;}} internal bool CanWrite {get {return _CanWrite;}} // Returns a read data stream and metadata associated with a cached entry. // Returns Stream.Null if there is no entry found. //An opened cache entry be preserved until the stream is closed. // internal abstract Stream Retrieve(string key, out RequestCacheEntry cacheEntry); // Returns a write cache stream associated with the string Key. // Passed parameters allow cache to update an entry metadata accordingly. //The commit operation should happen on the stream closure. // internal abstract Stream Store( string key, long contentLength, DateTime expiresUtc, DateTime lastModifiedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata ); // // Removes an entry from the cache. // internal abstract void Remove(string key); // // Updates only metadata associated with a cached entry. // internal abstract void Update( string key, DateTime expiresUtc, DateTime lastModifiedUtc, DateTime lastSynchronizedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata); // // Does not throw on failure internal abstract bool TryRetrieve(string key, out RequestCacheEntry cacheEntry, out Stream readStream); // // Does not throw on failure internal abstract bool TryStore( string key, long contentLength, DateTime expiresUtc, DateTime lastModifiedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata, out Stream writeStream); // // Does not throw on failure internal abstract bool TryRemove(string key); // // Does not throw on failure internal abstract bool TryUpdate( string key, DateTime expiresUtc, DateTime lastModifiedUtc, DateTime lastSynchronizedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata); // // This can be looked as a design hole since we have to keep the entry // locked for the case when we want to update that previously retrieved entry. // I think RequestCache contract should allow to detect that a new physical cache entry // does not match to the "entry being updated" and so to should ignore updates on replaced entries. // internal abstract void UnlockEntry(Stream retrieveStream); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. /*++ Copyright (c) Microsoft Corporation Module Name: RequestCache.cs Abstract: The file specifies interfaces used to communicate with Request Caching subsystem. Author: Alexei Vopilov 21-Dec-2002 Revision History: Jan 25 2004 - Changed the visibility of the class from public to internal. --*/ namespace System.Net.Cache { using System; using System.Diagnostics; using System.Text; using System.IO; using System.Collections.Specialized; using System.Threading; // The class specifies the contract for a caching storage to participate in the caching protocol. // The required functionality is to retrieve cached data and update cache based on a string as a Key. // It is also assumed that cache does storage quota management so it can remove expired cached entries under limited space conditions. // Note that no implementation methods should block as there is no Async API exposed by this type. internal abstract class RequestCache { internal static readonly char[] LineSplits = new char[] {'\r','\n'}; private bool _IsPrivateCache; private bool _CanWrite; protected RequestCache( bool isPrivateCache, bool canWrite) { _IsPrivateCache = isPrivateCache; _CanWrite = canWrite; } internal bool IsPrivateCache {get {return _IsPrivateCache;}} internal bool CanWrite {get {return _CanWrite;}} // Returns a read data stream and metadata associated with a cached entry. // Returns Stream.Null if there is no entry found. //An opened cache entry be preserved until the stream is closed. // internal abstract Stream Retrieve(string key, out RequestCacheEntry cacheEntry); // Returns a write cache stream associated with the string Key. // Passed parameters allow cache to update an entry metadata accordingly. //The commit operation should happen on the stream closure. // internal abstract Stream Store( string key, long contentLength, DateTime expiresUtc, DateTime lastModifiedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata ); // // Removes an entry from the cache. // internal abstract void Remove(string key); // // Updates only metadata associated with a cached entry. // internal abstract void Update( string key, DateTime expiresUtc, DateTime lastModifiedUtc, DateTime lastSynchronizedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata); // // Does not throw on failure internal abstract bool TryRetrieve(string key, out RequestCacheEntry cacheEntry, out Stream readStream); // // Does not throw on failure internal abstract bool TryStore( string key, long contentLength, DateTime expiresUtc, DateTime lastModifiedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata, out Stream writeStream); // // Does not throw on failure internal abstract bool TryRemove(string key); // // Does not throw on failure internal abstract bool TryUpdate( string key, DateTime expiresUtc, DateTime lastModifiedUtc, DateTime lastSynchronizedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata); // // This can be looked as a design hole since we have to keep the entry // locked for the case when we want to update that previously retrieved entry. // I think RequestCache contract should allow to detect that a new physical cache entry // does not match to the "entry being updated" and so to should ignore updates on replaced entries. // internal abstract void UnlockEntry(Stream retrieveStream); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CollectionAdapters.cs
- SoapSchemaExporter.cs
- ResourcePool.cs
- Partitioner.cs
- ThreadStartException.cs
- Application.cs
- IOThreadScheduler.cs
- SelectingProviderEventArgs.cs
- DbConnectionPoolGroup.cs
- Publisher.cs
- MasterPageParser.cs
- ConsumerConnectionPointCollection.cs
- ToolStripHighContrastRenderer.cs
- TableLayoutPanelCellPosition.cs
- TextSimpleMarkerProperties.cs
- SqlDataRecord.cs
- Dispatcher.cs
- Crc32.cs
- ElementHostPropertyMap.cs
- PrefixQName.cs
- SafeWaitHandle.cs
- HostingEnvironmentSection.cs
- StorageEndPropertyMapping.cs
- XmlSchemaValidator.cs
- CatalogZoneBase.cs
- HttpAsyncResult.cs
- WaitForChangedResult.cs
- indexingfiltermarshaler.cs
- _HeaderInfo.cs
- XsdBuildProvider.cs
- CompensationToken.cs
- FixedSOMTableCell.cs
- ShaderEffect.cs
- SchemaElement.cs
- DateTimePicker.cs
- Panel.cs
- NullExtension.cs
- DataServiceQueryOfT.cs
- GroupJoinQueryOperator.cs
- RemotingConfigParser.cs
- TryCatch.cs
- KerberosRequestorSecurityTokenAuthenticator.cs
- Pkcs7Recipient.cs
- PenThreadWorker.cs
- SymbolPair.cs
- XmlSiteMapProvider.cs
- RedBlackList.cs
- MDIControlStrip.cs
- VisualTreeUtils.cs
- DataControlButton.cs
- PerfCounters.cs
- WindowsToolbar.cs
- InputLanguageCollection.cs
- HtmlGenericControl.cs
- LockCookie.cs
- MarshalByValueComponent.cs
- ToolStripManager.cs
- TextTreePropertyUndoUnit.cs
- ColorEditor.cs
- InstalledFontCollection.cs
- WebPartManager.cs
- IxmlLineInfo.cs
- DispatcherHooks.cs
- CultureMapper.cs
- NavigationWindowAutomationPeer.cs
- UIElement3D.cs
- Table.cs
- Sql8ConformanceChecker.cs
- Instrumentation.cs
- ListMarkerSourceInfo.cs
- SecurityTokenContainer.cs
- Config.cs
- RemotingConfigParser.cs
- QilVisitor.cs
- ConstraintCollection.cs
- GifBitmapDecoder.cs
- URLAttribute.cs
- JsonEnumDataContract.cs
- Brushes.cs
- ConnectionProviderAttribute.cs
- SignatureDescription.cs
- httpserverutility.cs
- tibetanshape.cs
- XmlArrayItemAttributes.cs
- parserscommon.cs
- ObjectDataSourceSelectingEventArgs.cs
- DelimitedListTraceListener.cs
- WebReferencesBuildProvider.cs
- Site.cs
- WorkItem.cs
- TextViewDesigner.cs
- ListViewItem.cs
- MemberAccessException.cs
- HttpRawResponse.cs
- ParameterCollectionEditorForm.cs
- RepeatBehavior.cs
- XmlSchema.cs
- Decorator.cs
- SecureUICommand.cs
- XPathParser.cs