mcs/class/System.ServiceModel/System.ServiceModel/InstanceContext.cs

   1 //
   2 // InstanceContext.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2005-2006 Novell, Inc.  http://www.novell.com
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 using System;
  29 using System.Collections.Generic;
  30 using System.ServiceModel.Channels;
  31 using System.ServiceModel.Dispatcher;
  32
  33 namespace System.ServiceModel
  34 {
  35         public sealed class InstanceContext : CommunicationObject,
  36                 IExtensibleObject<InstanceContext>
  37         {
  38                 ServiceHostBase host;
  39                 object implementation;
  40                 int manual_flow_limit;
  41                 InstanceManager instance_manager;
  42                 bool is_user_instance_provider;
  43                 bool is_user_context_provider;
  44                 ExtensionCollection<InstanceContext> _extensions;
  45
  46                 static InstanceContextIdleCallback idle_callback = new InstanceContextIdleCallback(NotifyIdle);
  47
  48                 public InstanceContext (object implementation)
  49                         : this (null, implementation)
  50                 {
  51                 }
  52
  53                 public InstanceContext (ServiceHostBase host)
  54                         : this (host, null)
  55                 {
  56                 }
  57
  58                 public InstanceContext (ServiceHostBase host, object implementation)
  59                         : this (host, implementation, true)
  60                 {
  61                 }
  62
  63                 internal InstanceContext (ServiceHostBase host, object implementation, bool userContextProvider)
  64                 {
  65                         this.host = host;
  66                         this.implementation = implementation;
  67                         is_user_context_provider = userContextProvider;
  68                 }
  69
  70                 internal bool IsUserProvidedInstance {
  71                         get {
  72                                 return is_user_instance_provider;
  73                         }
  74                 }
  75
  76                 internal bool IsUserProvidedContext {
  77                         get { return is_user_context_provider; }
  78                 }
  79
  80                 internal InstanceManager InstanceManager {
  81                         get { return instance_manager; }
  82                         set { instance_manager = value; }
  83                 }
  84
  85                 protected internal override TimeSpan DefaultCloseTimeout {
  86                         get { return host.DefaultCloseTimeout; }
  87                 }
  88
  89                 protected internal override TimeSpan DefaultOpenTimeout {
  90                         get { return host.DefaultOpenTimeout; }
  91                 }
  92
  93                 public IExtensionCollection<InstanceContext> Extensions {
  94                         get {
  95                                 if (_extensions == null)
  96                                         _extensions = new ExtensionCollection<InstanceContext> (this);
  97                                 return _extensions;
  98                         }
  99                 }
 100
 101                 public ServiceHostBase Host {
 102                         get { return host; }
 103                 }
 104
 105                 public ICollection<IChannel> IncomingChannels {
 106                         get { throw new NotImplementedException (); }
 107                 }
 108
 109                 public int ManualFlowControlLimit {
 110                         get { return manual_flow_limit; }
 111                         set { manual_flow_limit = value; }
 112                 }
 113
 114                 public ICollection<IChannel> OutgoingChannels {
 115                         get { throw new NotImplementedException (); }
 116                 }
 117
 118                 public object GetServiceInstance ()
 119                 {
 120                         return GetServiceInstance (null);
 121                 }
 122
 123                 public object GetServiceInstance (Message message)
 124                 {
 125                         if (implementation == null && instance_manager != null) {
 126                                 implementation = instance_manager.GetServiceInstance (this, message, ref is_user_instance_provider);
 127                         }
 128                         return implementation;
 129                 }
 130
 131                 public int IncrementManualFlowControlLimit (int incrementBy)
 132                 {
 133                         throw new NotImplementedException ();
 134                 }
 135
 136                 internal void CloseIfIdle () {
 137                         if (instance_manager.InstanceContextProvider != null && !IsUserProvidedContext) {
 138                                 if (!instance_manager.InstanceContextProvider.IsIdle (this)) {
 139                                         instance_manager.InstanceContextProvider.NotifyIdle (IdleCallback, this);
 140                                 }
 141                                 else {
 142                                         if (State != CommunicationState.Closed)
 143                                                 Close ();
 144                                 }
 145                         }
 146                 }
 147
 148                 static void NotifyIdle (InstanceContext ctx) {
 149                         ctx.CloseIfIdle ();
 150                 }
 151
 152                 internal InstanceContextIdleCallback IdleCallback {
 153                         get {
 154                                 return idle_callback;
 155                         }
 156                 }
 157
 158                 public void ReleaseServiceInstance ()
 159                 {
 160                         instance_manager.ReleaseServiceInstance (this, implementation);
 161                         // This does NOT dispose the instance implementation. See DispatrchRuntimeTest.TestInstanceBehavior2 (which never reports "Dispose").
 162                         implementation = null;
 163                 }
 164
 165                 void DisposeInstance ()
 166                 {
 167                         var disp = implementation as IDisposable;
 168                         if (disp != null)
 169                                 disp.Dispose ();
 170                         implementation = null;
 171                 }
 172
 173                 protected override void OnAbort ()
 174                 {
 175                         DisposeInstance ();
 176                 }
 177
 178                 protected override void OnFaulted ()
 179                 {
 180                         DisposeInstance ();
 181                         base.OnFaulted ();
 182                 }
 183
 184                 protected override void OnClosed ()
 185                 {
 186                         DisposeInstance ();
 187                         base.OnClosed ();
 188                 }
 189
 190                 [MonoTODO]
 191                 protected override void OnOpened ()
 192                 {
 193                         base.OnOpened ();
 194                 }
 195
 196                 protected override void OnOpening ()
 197                 {
 198                         base.OnOpening ();
 199                         if (instance_manager != null)
 200                                 instance_manager.Initialize (this);
 201                 }
 202
 203                 Action<TimeSpan> open_delegate, close_delegate;
 204
 205                 protected override IAsyncResult OnBeginOpen (
 206                         TimeSpan timeout, AsyncCallback callback, object state)
 207                 {
 208                         if (open_delegate == null)
 209                                 open_delegate = new Action<TimeSpan> (OnOpen);
 210                         return open_delegate.BeginInvoke (timeout, callback, state);
 211                 }
 212
 213                 protected override void OnEndOpen (IAsyncResult result)
 214                 {
 215                         open_delegate.EndInvoke (result);
 216                 }
 217
 218                 protected override void OnOpen (TimeSpan timeout)
 219                 {
 220                 }
 221
 222                 protected override IAsyncResult OnBeginClose (
 223                         TimeSpan timeout, AsyncCallback callback, object state)
 224                 {
 225                         if (close_delegate == null)
 226                                 close_delegate = new Action<TimeSpan> (OnClose);
 227                         return close_delegate.BeginInvoke (timeout, callback, state);
 228                 }
 229
 230                 protected override void OnEndClose (IAsyncResult result)
 231                 {
 232                         close_delegate.EndInvoke (result);
 233                 }
 234
 235                 protected override void OnClose (TimeSpan timeout)
 236                 {
 237                 }
 238         }
 239 }