Services/Transaction/Castle.Services.Transaction/CallContextActivityManager.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.Services.Transaction
  16 {
  17         using System;
  18         using System.Runtime.Remoting.Messaging;
  19
  20         public class CallContextActivityManager : MarshalByRefObject, IActivityManager
  21         {
  22                 private const string Key = "Castle.Services.Transaction.Activity";
  23
  24                 private object lockObj = new object();
  25
  26                 /// <summary>
  27                 /// Initializes a new instance of the <see cref="CallContextActivityManager"/> class.
  28                 /// </summary>
  29                 public CallContextActivityManager()
  30                 {
  31                         CallContext.SetData(Key, null);
  32                 }
  33
  34                 #region MarshalByRefObject
  35
  36                 ///<summary>
  37                 ///Obtains a lifetime service object to control the lifetime policy for this instance.
  38                 ///</summary>
  39                 ///
  40                 ///<returns>
  41                 ///An object of type <see cref="T:System.Runtime.Remoting.Lifetime.ILease"></see> used to control the lifetime policy for this instance. This is the current lifetime service object for this instance if one exists; otherwise, a new lifetime service object initialized to the value of the <see cref="P:System.Runtime.Remoting.Lifetime.LifetimeServices.LeaseManagerPollTime"></see> property.
  42                 ///</returns>
  43                 ///
  44                 ///<exception cref="T:System.Security.SecurityException">The immediate caller does not have infrastructure permission. </exception><filterpriority>2</filterpriority><PermissionSet><IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="RemotingConfiguration, Infrastructure" /></PermissionSet>
  45                 public override object InitializeLifetimeService()
  46                 {
  47                         return null;
  48                 }
  49
  50                 #endregion
  51
  52                 /// <summary>
  53                 /// Gets the current activity.
  54                 /// </summary>
  55                 /// <value>The current activity.</value>
  56                 public Activity CurrentActivity
  57                 {
  58                         get
  59                         {
  60                                 lock(lockObj)
  61                                 {
  62                                         Activity activity = (Activity) CallContext.GetData(Key);
  63
  64                                         if (activity == null)
  65                                         {
  66                                                 activity = new Activity();
  67                                                 CallContext.SetData(Key, activity);
  68                                         }
  69
  70                                         return activity;
  71                                 }
  72                         }
  73                 }
  74         }
  75 }