mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs

   1 //
   2 // ClientRuntimeChannel.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.Reflection;
  31 using System.Runtime.Serialization;
  32 using System.ServiceModel.Channels;
  33 using System.ServiceModel.Description;
  34 using System.ServiceModel.Dispatcher;
  35 using System.ServiceModel.Security;
  36 using System.Threading;
  37 using System.Xml;
  38
  39 namespace System.ServiceModel.MonoInternal
  40 {
  41 #if DISABLE_REAL_PROXY
  42         // FIXME: This is a quick workaround for bug #571907
  43         public
  44 #endif
  45         interface IInternalContextChannel
  46         {
  47                 ContractDescription Contract { get; }
  48
  49                 OperationContext Context { set; }
  50
  51                 object Process (MethodBase method, string operationName, object [] parameters);
  52
  53                 IAsyncResult BeginProcess (MethodBase method, string operationName, object [] parameters, AsyncCallback callback, object asyncState);
  54
  55                 object EndProcess (MethodBase method, string operationName, object [] parameters, IAsyncResult result);
  56         }
  57
  58 #if DISABLE_REAL_PROXY
  59         // FIXME: This is a quick workaround for bug #571907
  60         public
  61 #endif
  62         class ClientRuntimeChannel
  63                 : CommunicationObject, IClientChannel, IInternalContextChannel
  64         {
  65                 ClientRuntime runtime;
  66                 EndpointAddress remote_address;
  67                 ContractDescription contract;
  68                 MessageVersion message_version;
  69                 TimeSpan default_open_timeout, default_close_timeout;
  70                 IChannel channel;
  71                 IChannelFactory factory;
  72                 OperationContext context;
  73
  74                 #region delegates
  75                 readonly ProcessDelegate _processDelegate;
  76
  77                 delegate object ProcessDelegate (MethodBase method, string operationName, object [] parameters);
  78
  79                 readonly RequestDelegate requestDelegate;
  80
  81                 delegate Message RequestDelegate (Message msg, TimeSpan timeout);
  82
  83                 readonly SendDelegate sendDelegate;
  84
  85                 delegate void SendDelegate (Message msg, TimeSpan timeout);
  86                 #endregion
  87
  88                 public ClientRuntimeChannel (ServiceEndpoint endpoint,
  89                         ChannelFactory channelFactory, EndpointAddress remoteAddress, Uri via)
  90                         : this (endpoint.CreateClientRuntime (null), endpoint.Contract, channelFactory.DefaultOpenTimeout, channelFactory.DefaultCloseTimeout, null, channelFactory.OpenedChannelFactory, endpoint.Binding.MessageVersion, remoteAddress, via)
  91                 {
  92                 }
  93
  94                 public ClientRuntimeChannel (ClientRuntime runtime, ContractDescription contract, TimeSpan openTimeout, TimeSpan closeTimeout, IChannel contextChannel, IChannelFactory factory, MessageVersion messageVersion, EndpointAddress remoteAddress, Uri via)
  95                 {
  96                         if (runtime == null)
  97                                 throw new ArgumentNullException ("runtime");
  98                         if (messageVersion == null)
  99                                 throw new ArgumentNullException ("messageVersion");
 100                         this.runtime = runtime;
 101                         this.remote_address = remoteAddress;
 102                         if (runtime.Via == null)
 103                                 runtime.Via = via ?? (remote_address != null ?remote_address.Uri : null);
 104                         this.contract = contract;
 105                         this.message_version = messageVersion;
 106                         default_open_timeout = openTimeout;
 107                         default_close_timeout = closeTimeout;
 108                         _processDelegate = new ProcessDelegate (Process);
 109                         requestDelegate = new RequestDelegate (Request);
 110                         sendDelegate = new SendDelegate (Send);
 111
 112                         // default values
 113                         AllowInitializationUI = true;
 114                         OperationTimeout = TimeSpan.FromMinutes (1);
 115
 116                         if (contextChannel != null)
 117                                 channel = contextChannel;
 118                         else {
 119                                 var method = factory.GetType ().GetMethod ("CreateChannel", new Type [] {typeof (EndpointAddress), typeof (Uri)});
 120                                 try {
 121                                         channel = (IChannel) method.Invoke (factory, new object [] {remote_address, Via});
 122                                         this.factory = factory;
 123                                 } catch (TargetInvocationException ex) {
 124                                         if (ex.InnerException != null)
 125                                                 throw ex.InnerException;
 126                                         else
 127                                                 throw;
 128                                 }
 129                         }
 130                 }
 131
 132                 public ContractDescription Contract {
 133                         get { return contract; }
 134                 }
 135
 136                 public ClientRuntime Runtime {
 137                         get { return runtime; }
 138                 }
 139
 140                 IRequestChannel RequestChannel {
 141                         get { return channel as IRequestChannel; }
 142                 }
 143
 144                 IOutputChannel OutputChannel {
 145                         get { return channel as IOutputChannel; }
 146                 }
 147
 148                 internal IDuplexChannel DuplexChannel {
 149                         get { return channel as IDuplexChannel; }
 150                 }
 151
 152                 public OperationContext Context {
 153                         set { context = value; }
 154                 }
 155
 156                 #region IClientChannel
 157
 158                 bool did_interactive_initialization;
 159
 160                 public bool AllowInitializationUI { get; set; }
 161
 162                 public bool DidInteractiveInitialization {
 163                         get { return did_interactive_initialization; }
 164                 }
 165
 166                 public Uri Via {
 167                         get { return runtime.Via; }
 168                 }
 169
 170                 class DelegatingWaitHandle : WaitHandle
 171                 {
 172                         public DelegatingWaitHandle (IAsyncResult [] results)
 173                         {
 174                                 this.results = results;
 175                         }
 176
 177                         IAsyncResult [] results;
 178
 179                         protected override void Dispose (bool disposing)
 180                         {
 181                                 if (disposing)
 182                                         foreach (var r in results)
 183                                                 r.AsyncWaitHandle.Close ();
 184                         }
 185
 186                         public override bool WaitOne ()
 187                         {
 188                                 foreach (var r in results)
 189                                         r.AsyncWaitHandle.WaitOne ();
 190                                 return true;
 191                         }
 192
 193                         public override bool WaitOne (int millisecondsTimeout)
 194                         {
 195                                 return WaitHandle.WaitAll (ResultWaitHandles, millisecondsTimeout);
 196                         }
 197
 198                         WaitHandle [] ResultWaitHandles {
 199                                 get {
 200                                         var arr = new WaitHandle [results.Length];
 201                                         for (int i = 0; i < arr.Length; i++)
 202                                                 arr [i] = results [i].AsyncWaitHandle;
 203                                         return arr;
 204                                 }
 205                         }
 206
 207                         public override bool WaitOne (int millisecondsTimeout, bool exitContext)
 208                         {
 209                                 return WaitHandle.WaitAll (ResultWaitHandles, millisecondsTimeout, exitContext);
 210                         }
 211
 212                         public override bool WaitOne (TimeSpan timeout, bool exitContext)
 213                         {
 214                                 return WaitHandle.WaitAll (ResultWaitHandles, timeout, exitContext);
 215                         }
 216                 }
 217
 218                 class DisplayUIAsyncResult : IAsyncResult
 219                 {
 220                         public DisplayUIAsyncResult (IAsyncResult [] results)
 221                         {
 222                                 this.results = results;
 223                         }
 224
 225                         IAsyncResult [] results;
 226
 227                         internal IAsyncResult [] Results {
 228                                 get { return results; }
 229                         }
 230
 231                         public object AsyncState {
 232                                 get { return null; }
 233                         }
 234
 235                         WaitHandle wait_handle;
 236
 237                         public WaitHandle AsyncWaitHandle {
 238                                 get {
 239                                         if (wait_handle == null)
 240                                                 wait_handle = new DelegatingWaitHandle (results);
 241                                         return wait_handle;
 242                                 }
 243                         }
 244
 245                         public bool CompletedSynchronously {
 246                                 get {
 247                                         foreach (var r in results)
 248                                                 if (!r.CompletedSynchronously)
 249                                                         return false;
 250                                         return true;
 251                                 }
 252                         }
 253                         public bool IsCompleted {
 254                                 get {
 255                                         foreach (var r in results)
 256                                                 if (!r.IsCompleted)
 257                                                         return false;
 258                                         return true;
 259                                 }
 260                         }
 261                 }
 262
 263                 public IAsyncResult BeginDisplayInitializationUI (
 264                         AsyncCallback callback, object state)
 265                 {
 266                         OnInitializationUI ();
 267                         IAsyncResult [] arr = new IAsyncResult [runtime.InteractiveChannelInitializers.Count];
 268                         int i = 0;
 269                         foreach (var init in runtime.InteractiveChannelInitializers)
 270                                 arr [i++] = init.BeginDisplayInitializationUI (this, callback, state);
 271                         return new DisplayUIAsyncResult (arr);
 272                 }
 273
 274                 public void EndDisplayInitializationUI (
 275                         IAsyncResult result)
 276                 {
 277                         DisplayUIAsyncResult r = (DisplayUIAsyncResult) result;
 278                         int i = 0;
 279                         foreach (var init in runtime.InteractiveChannelInitializers)
 280                                 init.EndDisplayInitializationUI (r.Results [i++]);
 281
 282                         did_interactive_initialization = true;
 283                 }
 284
 285                 public void DisplayInitializationUI ()
 286                 {
 287                         OnInitializationUI ();
 288                         foreach (var init in runtime.InteractiveChannelInitializers)
 289                                 init.EndDisplayInitializationUI (init.BeginDisplayInitializationUI (this, null, null));
 290
 291                         did_interactive_initialization = true;
 292                 }
 293
 294                 void OnInitializationUI ()
 295                 {
 296                         if (!AllowInitializationUI && runtime.InteractiveChannelInitializers.Count > 0)
 297                                 throw new InvalidOperationException ("AllowInitializationUI is set to false but the client runtime contains one or more InteractiveChannelInitializers.");
 298                 }
 299
 300                 public void Dispose ()
 301                 {
 302                         Close ();
 303                 }
 304
 305                 public event EventHandler<UnknownMessageReceivedEventArgs> UnknownMessageReceived;
 306
 307                 #endregion
 308
 309                 #region IContextChannel
 310
 311                 [MonoTODO]
 312                 public bool AllowOutputBatching { get; set; }
 313
 314                 public IInputSession InputSession {
 315                         get {
 316                                 ISessionChannel<IInputSession> ch = RequestChannel as ISessionChannel<IInputSession>;
 317                                 ch = ch ?? OutputChannel as ISessionChannel<IInputSession>;
 318                                 if (ch != null)
 319                                         return ch.Session;
 320                                 var dch = OutputChannel as ISessionChannel<IDuplexSession>;
 321                                 return dch != null ? dch.Session : null;
 322                         }
 323                 }
 324
 325                 public EndpointAddress LocalAddress {
 326                         get {
 327                                 var dc = OperationChannel as IDuplexChannel;
 328                                 return dc != null ? dc.LocalAddress : null;
 329                         }
 330                 }
 331
 332                 [MonoTODO]
 333                 public TimeSpan OperationTimeout { get; set; }
 334
 335                 public IOutputSession OutputSession {
 336                         get {
 337                                 ISessionChannel<IOutputSession> ch = RequestChannel as ISessionChannel<IOutputSession>;
 338                                 ch = ch ?? OutputChannel as ISessionChannel<IOutputSession>;
 339                                 if (ch != null)
 340                                         return ch.Session;
 341                                 var dch = OutputChannel as ISessionChannel<IDuplexSession>;
 342                                 return dch != null ? dch.Session : null;
 343                         }
 344                 }
 345
 346                 public EndpointAddress RemoteAddress {
 347                         get { return RequestChannel != null ? RequestChannel.RemoteAddress : OutputChannel.RemoteAddress; }
 348                 }
 349
 350                 public string SessionId {
 351                         get { return OutputSession != null ? OutputSession.Id : InputSession != null ? InputSession.Id : null; }
 352                 }
 353
 354                 #endregion
 355
 356                 // CommunicationObject
 357                 protected internal override TimeSpan DefaultOpenTimeout {
 358                         get { return default_open_timeout; }
 359                 }
 360
 361                 protected internal override TimeSpan DefaultCloseTimeout {
 362                         get { return default_close_timeout; }
 363                 }
 364
 365                 protected override void OnAbort ()
 366                 {
 367                         channel.Abort ();
 368                         if (factory != null) // ... is it valid?
 369                                 factory.Abort ();
 370                 }
 371
 372                 Action<TimeSpan> close_delegate;
 373
 374                 protected override IAsyncResult OnBeginClose (
 375                         TimeSpan timeout, AsyncCallback callback, object state)
 376                 {
 377                         if (close_delegate == null)
 378                                 close_delegate = new Action<TimeSpan> (OnClose);
 379                         return close_delegate.BeginInvoke (timeout, callback, state);
 380                 }
 381
 382                 protected override void OnEndClose (IAsyncResult result)
 383                 {
 384                         close_delegate.EndInvoke (result);
 385                 }
 386
 387                 protected override void OnClose (TimeSpan timeout)
 388                 {
 389                         DateTime start = DateTime.Now;
 390                         if (channel.State == CommunicationState.Opened)
 391                                 channel.Close (timeout);
 392                 }
 393
 394                 Action<TimeSpan> open_callback;
 395
 396                 protected override IAsyncResult OnBeginOpen (
 397                         TimeSpan timeout, AsyncCallback callback, object state)
 398                 {
 399                         if (open_callback == null)
 400                                 open_callback = new Action<TimeSpan> (OnOpen);
 401                         return open_callback.BeginInvoke (timeout, callback, state);
 402                 }
 403
 404                 protected override void OnEndOpen (IAsyncResult result)
 405                 {
 406                         if (open_callback == null)
 407                                 throw new InvalidOperationException ("Async open operation has not started");
 408                         open_callback.EndInvoke (result);
 409                 }
 410
 411                 protected override void OnOpen (TimeSpan timeout)
 412                 {
 413                         if (runtime.InteractiveChannelInitializers.Count > 0 && !DidInteractiveInitialization)
 414                                 throw new InvalidOperationException ("The client runtime is assigned interactive channel initializers, and in such case DisplayInitializationUI must be called before the channel is opened.");
 415                         if (channel.State == CommunicationState.Created)
 416                                 channel.Open (timeout);
 417                 }
 418
 419                 // IChannel
 420
 421                 IChannel OperationChannel {
 422                         get { return channel; }
 423                 }
 424
 425                 public T GetProperty<T> () where T : class
 426                 {
 427                         if (typeof (T) == typeof (MessageVersion))
 428                                 return (T) (object) message_version;
 429                         return OperationChannel.GetProperty<T> ();
 430                 }
 431
 432                 // IExtensibleObject<IContextChannel>
 433
 434                 IExtensionCollection<IContextChannel> extensions;
 435
 436                 public IExtensionCollection<IContextChannel> Extensions {
 437                         get {
 438                                 if (extensions == null)
 439                                         extensions = new ExtensionCollection<IContextChannel> (this);
 440                                 return extensions;
 441                         }
 442                 }
 443
 444                 #region Request/Output processing
 445
 446                 public IAsyncResult BeginProcess (MethodBase method, string operationName, object [] parameters, AsyncCallback callback, object asyncState)
 447                 {
 448                         if (context != null)
 449                                 throw new InvalidOperationException ("another operation is in progress");
 450                         context = OperationContext.Current;
 451
 452                         return _processDelegate.BeginInvoke (method, operationName, parameters, callback, asyncState);
 453                 }
 454
 455                 public object EndProcess (MethodBase method, string operationName, object [] parameters, IAsyncResult result)
 456                 {
 457
 458                         if (result == null)
 459                                 throw new ArgumentNullException ("result");
 460                         if (parameters == null)
 461                                 throw new ArgumentNullException ("parameters");
 462                         // FIXME: the method arguments should be verified to be
 463                         // identical to the arguments in the corresponding begin method.
 464                         object asyncResult = _processDelegate.EndInvoke (result);
 465                         context = null;
 466                         return asyncResult;
 467                 }
 468
 469                 public object Process (MethodBase method, string operationName, object [] parameters)
 470                 {
 471                         var previousContext = OperationContext.Current;
 472                         try {
 473                                 // Inherit the context from the calling thread
 474                                 if (this.context != null)
 475                                         OperationContext.Current = this.context;
 476
 477                                 return DoProcess (method, operationName, parameters);
 478                         } catch (Exception ex) {
 479                                 throw;
 480                         } finally {
 481                                 // Reset the context before the thread goes back into the pool
 482                                 OperationContext.Current = previousContext;
 483                         }
 484                 }
 485
 486                 object DoProcess (MethodBase method, string operationName, object [] parameters)
 487                 {
 488                         if (AllowInitializationUI)
 489                                 DisplayInitializationUI ();
 490                         OperationDescription od = SelectOperation (method, operationName, parameters);
 491
 492                         if (State != CommunicationState.Opened)
 493                                 Open ();
 494
 495                         if (!od.IsOneWay)
 496                                 return Request (od, parameters);
 497                         else {
 498                                 Output (od, parameters);
 499                                 return null;
 500                         }
 501                 }
 502
 503                 OperationDescription SelectOperation (MethodBase method, string operationName, object [] parameters)
 504                 {
 505                         string operation;
 506                         if (Runtime.OperationSelector != null)
 507                                 operation = Runtime.OperationSelector.SelectOperation (method, parameters);
 508                         else
 509                                 operation = operationName;
 510                         OperationDescription od = contract.Operations.Find (operation);
 511                         if (od == null)
 512                                 throw new Exception (String.Format ("OperationDescription for operation '{0}' was not found in its internally-generated contract.", operation));
 513                         return od;
 514                 }
 515
 516                 void Output (OperationDescription od, object [] parameters)
 517                 {
 518                         ClientOperation op = runtime.Operations [od.Name];
 519                         Send (CreateRequest (op, parameters), OperationTimeout);
 520                 }
 521
 522                 object Request (OperationDescription od, object [] parameters)
 523                 {
 524                         ClientOperation op = runtime.Operations [od.Name];
 525                         object [] inspections = new object [runtime.MessageInspectors.Count];
 526                         Message req = CreateRequest (op, parameters);
 527
 528                         for (int i = 0; i < inspections.Length; i++)
 529                                 inspections [i] = runtime.MessageInspectors [i].BeforeSendRequest (ref req, this);
 530
 531                         Message res = Request (req, OperationTimeout);
 532                         if (res.IsFault) {
 533                                 var resb = res.CreateBufferedCopy (runtime.MaxFaultSize);
 534                                 MessageFault fault = MessageFault.CreateFault (resb.CreateMessage (), runtime.MaxFaultSize);
 535                                 var conv = OperationChannel.GetProperty<FaultConverter> () ?? FaultConverter.GetDefaultFaultConverter (res.Version);
 536                                 Exception ex;
 537                                 if (!conv.TryCreateException (resb.CreateMessage (), fault, out ex)) {
 538                                         if (fault.HasDetail) {
 539                                                 Type detailType = typeof (ExceptionDetail);
 540                                                 var freader = fault.GetReaderAtDetailContents ();
 541                                                 DataContractSerializer ds = null;
 542                                                 foreach (var fci in op.FaultContractInfos)
 543                                                         if (res.Headers.Action == fci.Action || fci.Serializer.IsStartObject (freader)) {
 544                                                                 detailType = fci.Detail;
 545                                                                 ds = fci.Serializer;
 546                                                                 break;
 547                                                         }
 548                                                 if (ds == null)
 549                                                         ds = new DataContractSerializer (detailType);
 550                                                 var detail = ds.ReadObject (freader);
 551                                                 ex = (Exception) Activator.CreateInstance (typeof (FaultException<>).MakeGenericType (detailType), new object [] {detail, fault.Reason, fault.Code, res.Headers.Action});
 552                                         }
 553
 554                                         if (ex == null)
 555                                                 ex = new FaultException (fault);
 556                                 }
 557                                 throw ex;
 558                         }
 559
 560                         for (int i = 0; i < inspections.Length; i++)
 561                                 runtime.MessageInspectors [i].AfterReceiveReply (ref res, inspections [i]);
 562
 563                         if (op.DeserializeReply)
 564                                 return op.Formatter.DeserializeReply (res, parameters);
 565                         else
 566                                 return res;
 567                 }
 568
 569                 #region Message-based Request() and Send()
 570                 // They are internal for ClientBase<T>.ChannelBase use.
 571                 internal Message Request (Message msg, TimeSpan timeout)
 572                 {
 573                         if (RequestChannel != null)
 574                                 return RequestChannel.Request (msg, timeout);
 575                         else
 576                                 return RequestCorrelated (msg, timeout, OutputChannel);
 577                 }
 578
 579                 internal virtual Message RequestCorrelated (Message msg, TimeSpan timeout, IOutputChannel channel)
 580                 {
 581                         // FIXME: implement ConcurrencyMode check:
 582                         // if it is .Single && this instance for a callback channel && the operation is invoked inside service operation, then error.
 583
 584                         DateTime startTime = DateTime.Now;
 585                         OutputChannel.Send (msg, timeout);
 586                         return ((IDuplexChannel) channel).Receive (timeout - (DateTime.Now - startTime));
 587                 }
 588
 589                 internal IAsyncResult BeginRequest (Message msg, TimeSpan timeout, AsyncCallback callback, object state)
 590                 {
 591                         return requestDelegate.BeginInvoke (msg, timeout, callback, state);
 592                 }
 593
 594                 internal Message EndRequest (IAsyncResult result)
 595                 {
 596                         return requestDelegate.EndInvoke (result);
 597                 }
 598
 599                 internal void Send (Message msg, TimeSpan timeout)
 600                 {
 601                         if (OutputChannel != null)
 602                                 OutputChannel.Send (msg, timeout);
 603                         else
 604                                 RequestChannel.Request (msg, timeout); // and ignore returned message.
 605                 }
 606
 607                 internal IAsyncResult BeginSend (Message msg, TimeSpan timeout, AsyncCallback callback, object state)
 608                 {
 609                         return sendDelegate.BeginInvoke (msg, timeout, callback, state);
 610                 }
 611
 612                 internal void EndSend (IAsyncResult result)
 613                 {
 614                         sendDelegate.EndInvoke (result);
 615                 }
 616                 #endregion
 617
 618                 Message CreateRequest (ClientOperation op, object [] parameters)
 619                 {
 620                         MessageVersion version = message_version;
 621                         if (version == null)
 622                                 version = MessageVersion.Default;
 623
 624                         Message msg;
 625                         if (op.SerializeRequest)
 626                                 msg = op.Formatter.SerializeRequest (
 627                                         version, parameters);
 628                         else {
 629                                 if (parameters.Length != 1)
 630                                         throw new ArgumentException (String.Format ("Argument parameters does not match the expected input. It should contain only a Message, but has {0} parameters", parameters.Length));
 631                                 if (!(parameters [0] is Message))
 632                                         throw new ArgumentException (String.Format ("Argument should be only a Message, but has {0}", parameters [0] != null ? parameters [0].GetType ().FullName : "null"));
 633                                 msg = (Message) parameters [0];
 634                         }
 635
 636                         context = context ?? OperationContext.Current;
 637                         if (context != null) {
 638                                 // CopyHeadersFrom does not work here (brings duplicates -> error)
 639                                 foreach (var mh in context.OutgoingMessageHeaders) {
 640                                         int x = msg.Headers.FindHeader (mh.Name, mh.Namespace, mh.Actor);
 641                                         if (x >= 0)
 642                                                 msg.Headers.RemoveAt (x);
 643                                         msg.Headers.Add ((MessageHeader) mh);
 644                                 }
 645                                 msg.Properties.CopyProperties (context.OutgoingMessageProperties);
 646                         }
 647
 648                         // FIXME: disabling MessageId as it's not seen for bug #567672 case. But might be required for PeerDuplexChannel. Check it later.
 649                         //if (OutputSession != null)
 650                         //      msg.Headers.MessageId = new UniqueId (OutputSession.Id);
 651                         msg.Properties.AllowOutputBatching = AllowOutputBatching;
 652
 653                         if (msg.Version.Addressing.Equals (AddressingVersion.WSAddressing10)) {
 654                                 if (msg.Headers.MessageId == null)
 655                                         msg.Headers.MessageId = new UniqueId ();
 656                                 if (msg.Headers.ReplyTo == null)
 657                                         msg.Headers.ReplyTo = new EndpointAddress (Constants.WsaAnonymousUri);
 658                                 if (msg.Headers.To == null && RemoteAddress != null)
 659                                         msg.Headers.To = RemoteAddress.Uri;
 660                         }
 661
 662                         return msg;
 663                 }
 664
 665                 #endregion
 666         }
 667 }