ActiveRecord/Castle.ActiveRecord/Framework/Scopes/HybridWebThreadScopeInfo.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.ActiveRecord.Framework.Scopes
  16 {
  17         using System;
  18         using System.Collections;
  19         using System.Runtime.CompilerServices;
  20         using System.Web;
  21         using Castle.ActiveRecord.Framework;
  22
  23         /// <summary>
  24         /// This <see cref="IThreadScopeInfo"/> implementation will first try to get the current scope from the current
  25         /// request, and if not found, will use a thread lcoal scope.
  26         /// </summary>
  27         /// <remarks>
  28         /// This is used for scenarios where most of the you need per request scope, but you also does some work outside a
  29         /// request (in a thread pool thread, for instnace).
  30         /// </remarks>
  31         public class HybridWebThreadScopeInfo : AbstractThreadScopeInfo, IWebThreadScopeInfo
  32         {
  33                 const string ActiveRecordCurrentStack = "activerecord.currentstack";
  34
  35                 [ThreadStatic] static Stack stack;
  36
  37                 /// <summary>
  38                 /// Gets the current stack.
  39                 /// </summary>
  40                 /// <value>The current stack.</value>
  41                 public override Stack CurrentStack
  42                 {
  43                         [MethodImpl(MethodImplOptions.Synchronized)]
  44                         get
  45                         {
  46                                 HttpContext current = HttpContext.Current;
  47
  48                                 if (current == null)
  49                                 {
  50                                         if (stack == null)
  51                                         {
  52                                                 stack = new Stack();
  53                                         }
  54
  55                                         return stack;
  56                                 }
  57
  58                                 Stack contextstack = (Stack)current.Items[ActiveRecordCurrentStack];
  59
  60                                 if (contextstack == null)
  61                                 {
  62                                         contextstack = new Stack();
  63
  64                                         current.Items[ActiveRecordCurrentStack] = contextstack;
  65                                 }
  66
  67                                 return contextstack;
  68                         }
  69                 }
  70         }
  71 }