mcs/class/System.ServiceModel/System.ServiceModel.Channels/ReplyChannelBase.cs

   1 //
   2 // ReplyChannelBase.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 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.IO;
  31 using System.Net;
  32 using System.Net.Sockets;
  33 using System.Net.Security;
  34 using System.ServiceModel;
  35 using System.ServiceModel.Description;
  36 using System.ServiceModel.Security;
  37 using System.Threading;
  38 using System.Xml;
  39
  40 namespace System.ServiceModel.Channels
  41 {
  42         internal abstract class InternalReplyChannelBase : ReplyChannelBase
  43         {
  44                 public InternalReplyChannelBase (ChannelListenerBase listener)
  45                         : base (listener)
  46                 {
  47                         local_address = new EndpointAddress (listener.Uri);
  48                 }
  49
  50                 EndpointAddress local_address;
  51
  52                 public override EndpointAddress LocalAddress {
  53                         get { return local_address; }
  54                 }
  55         }
  56
  57         internal abstract class ReplyChannelBase : ChannelBase, IReplyChannel
  58         {
  59                 public ReplyChannelBase (ChannelListenerBase listener)
  60                         : base (listener)
  61                 {
  62                         this.listener = listener;
  63                 }
  64
  65                 ChannelListenerBase listener;
  66
  67                 public ChannelListenerBase Listener {
  68                         get { return listener; }
  69                 }
  70
  71                 public abstract EndpointAddress LocalAddress { get; }
  72
  73                 public override T GetProperty<T> ()
  74                 {
  75                         if (typeof (T) == typeof (MessageVersion) && listener is IHasMessageEncoder)
  76                                 return (T) (object) ((IHasMessageEncoder) listener).MessageEncoder.MessageVersion;
  77                         if (typeof (T) == typeof (IChannelListener))
  78                                 return (T) (object) listener;
  79                         return base.GetProperty<T> ();
  80                 }
  81
  82                 // FIXME: this is wrong. Implement all of them in each channel.
  83                 protected override void OnAbort ()
  84                 {
  85                         OnClose (TimeSpan.Zero);
  86                 }
  87
  88                 protected override void OnClose (TimeSpan timeout)
  89                 {
  90                         if (CurrentAsyncThread != null)
  91                                 if (!CancelAsync (timeout))
  92                                         CurrentAsyncThread.Abort ();
  93                 }
  94
  95                 public virtual bool CancelAsync (TimeSpan timeout)
  96                 {
  97                         // FIXME: It should wait for the actual completion.
  98                         return CurrentAsyncResult == null;
  99                         //return CurrentAsyncResult == null || CurrentAsyncResult.AsyncWaitHandle.WaitOne (timeout);
 100                 }
 101
 102                 public virtual bool TryReceiveRequest ()
 103                 {
 104                         RequestContext dummy;
 105                         return TryReceiveRequest (DefaultReceiveTimeout, out dummy);
 106                 }
 107
 108                 public abstract bool TryReceiveRequest (TimeSpan timeout, out RequestContext context);
 109
 110                 delegate bool TryReceiveDelegate (TimeSpan timeout, out RequestContext context);
 111                 TryReceiveDelegate try_recv_delegate;
 112
 113                 object async_result_lock = new object ();
 114                 protected Thread CurrentAsyncThread { get; private set; }
 115                 protected IAsyncResult CurrentAsyncResult { get; private set; }
 116
 117                 public virtual IAsyncResult BeginTryReceiveRequest (TimeSpan timeout, AsyncCallback callback, object state)
 118                 {
 119                         if (CurrentAsyncResult != null)
 120                                 throw new InvalidOperationException ("Another async TryReceiveRequest operation is in progress");
 121                         if (try_recv_delegate == null)
 122                                 try_recv_delegate = new TryReceiveDelegate (delegate (TimeSpan tout, out RequestContext ctx) {
 123                                         lock (async_result_lock) {
 124                                                 if (CurrentAsyncResult != null)
 125                                                         CurrentAsyncThread = Thread.CurrentThread;
 126                                         }
 127                                         try {
 128                                                 return TryReceiveRequest (tout, out ctx);
 129                                         } catch (XmlException ex) {
 130                                                 Console.WriteLine ("Xml Exception (Dropped Connection?):" + ex.Message);
 131                                                 //on dropped connection,
 132                                                 //whatever you do don't crash
 133                                                 //the whole app.  Ignore for now
 134                                         } catch (SocketException ex) {
 135                                                 Console.WriteLine ("Socket Exception (Dropped Connection?):" + ex.Message);
 136                                                 //on dropped connection,
 137                                                 //whatever you do don't crash
 138                                                 //the whole app.  Ignore for now
 139                                         } catch (IOException ex) {
 140                                                 Console.WriteLine ("I/O Exception (Dropped Connection?):" + ex.Message);
 141                                                 //on dropped connection,
 142                                                 //whatever you do don't crash
 143                                                 //the whole app.  Ignore for now
 144                                         } finally {
 145                                                 lock (async_result_lock) {
 146                                                         CurrentAsyncResult = null;
 147                                                         CurrentAsyncThread = null;
 148                                                 }
 149                                         }
 150                                         ctx = null;
 151                                         return false;
 152                                         });
 153                         RequestContext dummy;
 154                         IAsyncResult result;
 155                         lock (async_result_lock) {
 156                                 result = CurrentAsyncResult = try_recv_delegate.BeginInvoke (timeout, out dummy, callback, state);
 157                         }
 158                         // Note that at this point CurrentAsyncResult can be null here if delegate has run to completion
 159                         return result;
 160                 }
 161
 162                 public virtual bool EndTryReceiveRequest (IAsyncResult result)
 163                 {
 164                         RequestContext dummy;
 165                         return EndTryReceiveRequest (result, out dummy);
 166                 }
 167
 168                 public virtual bool EndTryReceiveRequest (IAsyncResult result, out RequestContext context)
 169                 {
 170                         if (try_recv_delegate == null)
 171                                 throw new InvalidOperationException ("BeginTryReceiveRequest operation has not started");
 172                         return try_recv_delegate.EndInvoke (out context, result);
 173                 }
 174
 175                 public virtual bool WaitForRequest ()
 176                 {
 177                         return WaitForRequest (DefaultReceiveTimeout);
 178                 }
 179
 180                 public abstract bool WaitForRequest (TimeSpan timeout);
 181
 182                 Func<TimeSpan,bool> wait_delegate;
 183
 184                 public virtual IAsyncResult BeginWaitForRequest (TimeSpan timeout, AsyncCallback callback, object state)
 185                 {
 186                         if (wait_delegate == null)
 187                                 wait_delegate = new Func<TimeSpan,bool> (WaitForRequest);
 188                         return wait_delegate.BeginInvoke (timeout, callback, state);
 189                 }
 190
 191                 public virtual bool EndWaitForRequest (IAsyncResult result)
 192                 {
 193                         if (wait_delegate == null)
 194                                 throw new InvalidOperationException ("BeginWaitForRequest operation has not started");
 195                         return wait_delegate.EndInvoke (result);
 196                 }
 197
 198                 public virtual RequestContext ReceiveRequest ()
 199                 {
 200                         return ReceiveRequest (DefaultReceiveTimeout);
 201                 }
 202
 203                 public abstract RequestContext ReceiveRequest (TimeSpan timeout);
 204
 205                 public virtual IAsyncResult BeginReceiveRequest (AsyncCallback callback, object state)
 206                 {
 207                         return BeginReceiveRequest (DefaultReceiveTimeout, callback, state);
 208                 }
 209
 210                 Func<TimeSpan,RequestContext> recv_delegate;
 211                 public virtual IAsyncResult BeginReceiveRequest (TimeSpan timeout, AsyncCallback callback, object state)
 212                 {
 213                         if (recv_delegate == null)
 214                                 recv_delegate = new Func<TimeSpan,RequestContext> (ReceiveRequest);
 215                         return recv_delegate.BeginInvoke (timeout, callback, state);
 216                 }
 217
 218                 public virtual RequestContext EndReceiveRequest (IAsyncResult result)
 219                 {
 220                         if (recv_delegate == null)
 221                                 throw new InvalidOperationException ("BeginReceiveRequest operation has not started");
 222                         return recv_delegate.EndInvoke (result);
 223                 }
 224
 225                 Action<TimeSpan> open_delegate, close_delegate;
 226
 227                 protected override IAsyncResult OnBeginOpen (TimeSpan timeout,
 228                         AsyncCallback callback, object state)
 229                 {
 230                         if (open_delegate == null)
 231                                 open_delegate = new Action<TimeSpan> (OnOpen);
 232                         return open_delegate.BeginInvoke (timeout, callback, state);
 233                 }
 234
 235                 protected override void OnEndOpen (IAsyncResult result)
 236                 {
 237                         if (open_delegate == null)
 238                                 throw new InvalidOperationException ("async open operation has not started");
 239                         open_delegate.EndInvoke (result);
 240                 }
 241
 242                 protected override IAsyncResult OnBeginClose (TimeSpan timeout,
 243                         AsyncCallback callback, object state)
 244                 {
 245                         if (close_delegate == null)
 246                                 close_delegate = new Action<TimeSpan> (OnClose);
 247                         return close_delegate.BeginInvoke (timeout, callback, state);
 248                 }
 249
 250                 protected override void OnEndClose (IAsyncResult result)
 251                 {
 252                         if (close_delegate == null)
 253                                 throw new InvalidOperationException ("async close operation has not started");
 254                         close_delegate.EndInvoke (result);
 255                 }
 256         }
 257 }