class/System.Web.Mvc/System.Web.Mvc/DefaultViewLocationCache.cs

   1 /* ****************************************************************************
   2  *
   3  * Copyright (c) Microsoft Corporation. All rights reserved.
   4  *
   5  * This software is subject to the Microsoft Public License (Ms-PL).
   6  * A copy of the license can be found in the license.htm file included
   7  * in this distribution.
   8  *
   9  * You must not remove this notice, or any other, from this software.
  10  *
  11  * ***************************************************************************/
  12
  13 namespace System.Web.Mvc {
  14     using System;
  15     using System.Diagnostics.CodeAnalysis;
  16     using System.Web.Caching;
  17     using System.Web.Mvc.Resources;
  18
  19     [SuppressMessage("Microsoft.Security", "CA2112:SecuredTypesShouldNotExposeFields",
  20         Justification = "The Null field does not have access to secure information")]
  21     public class DefaultViewLocationCache : IViewLocationCache {
  22         private static readonly TimeSpan _defaultTimeSpan = new TimeSpan(0, 15, 0);
  23
  24         public DefaultViewLocationCache()
  25             : this(_defaultTimeSpan) {
  26         }
  27
  28         public DefaultViewLocationCache(TimeSpan timeSpan) {
  29             if (timeSpan.Ticks < 0) {
  30                 throw new InvalidOperationException(MvcResources.DefaultViewLocationCache_NegativeTimeSpan);
  31             }
  32             TimeSpan = timeSpan;
  33         }
  34
  35         [SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes",
  36             Justification = "The reference type is immutable. ")]
  37         public static readonly IViewLocationCache Null = new NullViewLocationCache();
  38
  39         public TimeSpan TimeSpan {
  40             get;
  41             private set;
  42         }
  43
  44         #region IViewLocationCache Members
  45         public string GetViewLocation(HttpContextBase httpContext, string key) {
  46             if (httpContext == null) {
  47                 throw new ArgumentNullException("httpContext");
  48             }
  49             return (string)httpContext.Cache[key];
  50         }
  51
  52         public void InsertViewLocation(HttpContextBase httpContext, string key, string virtualPath) {
  53             if (httpContext == null) {
  54                 throw new ArgumentNullException("httpContext");
  55             }
  56             httpContext.Cache.Insert(key, virtualPath, null /* dependencies */, Cache.NoAbsoluteExpiration, TimeSpan);
  57         }
  58         #endregion
  59     }
  60 }