Experiments/Attic/MVC/Castle.MVC/StatePersister/SessionPersister.cs

   1 #region Apache Notice
   2 /*****************************************************************************
   3  *
   4  * Castle.MVC
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  ********************************************************************************/
  19 #endregion
  20
  21 #region Autors
  22
  23 /************************************************
  24 * Gilles Bayon
  25 *************************************************/
  26 #endregion
  27
  28 #region Using
  29
  30 using System;
  31 using System.Web;
  32 using System.Collections;
  33
  34 using Castle.MVC.States;
  35 #endregion
  36
  37 namespace Castle.MVC.StatePersister
  38 {
  39         /// <summary>
  40         /// This class provides simple session-based state persister for Web applications.
  41         /// </summary>
  42         public class SessionPersister : IStatePersister
  43         {
  44
  45                 #region Fields
  46
  47                 private IStateFactory _stateFactory = null;
  48
  49                 #endregion
  50
  51                 #region Constructors
  52                 /// <summary>
  53                 /// Constructor
  54                 /// </summary>
  55                 public SessionPersister()
  56                 {}
  57                 #endregion
  58
  59                 #region IStatePersister Members
  60
  61                 /// <summary>
  62                 /// State factory
  63                 /// </summary>
  64                 public IStateFactory StateFactory
  65                 {
  66                         get{ return _stateFactory;}
  67                         set{ _stateFactory = value; }
  68                 }
  69
  70                 /// <summary>
  71                 /// Saves state to the Session object.
  72                 /// </summary>
  73                 /// <param name="state">The state to save.</param>
  74                 public void Save(IState state)
  75                 {
  76                         //  put State object directly into Session
  77                         HttpContext.Current.Session[ BaseState.SESSION_KEY ] = state;
  78                 }
  79
  80                 /// <summary>
  81                 /// Loads the saved state.
  82                 /// </summary>
  83                 /// <returns>The saved state</returns>
  84                 public IState Load()
  85                 {
  86                         //  pull State object directly out of Session
  87                         IState state = HttpContext.Current.Session[ BaseState.SESSION_KEY ] as IState;
  88                         if (state==null)
  89                         {
  90                                 state = _stateFactory.Create();
  91                                 HttpContext.Current.Session[ BaseState.SESSION_KEY ] = state;
  92                         }
  93                         state.Reset();
  94                         return state;
  95                 }
  96
  97                 /// <summary>
  98                 /// Release a state
  99                 /// </summary>
 100                 /// <param name="state">The state to release.</param>
 101                 public void Release(IState state)
 102                 {
 103                         HttpContext.Current.Session.Remove( BaseState.SESSION_KEY );
 104                         _stateFactory.Release(state);
 105                 }
 106                 #endregion
 107         }
 108 }