mcs/class/System.ServiceModel/System.ServiceModel.Dispatcher/ChannelDispatcher.cs

   1 //
   2 // ChannelDispatcher.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2005,2009 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.Collections.ObjectModel;
  31 using System.Linq;
  32 using System.Reflection;
  33 using System.ServiceModel.Channels;
  34 using System.Threading;
  35 using System.Transactions;
  36 using System.ServiceModel;
  37 using System.ServiceModel.Description;
  38 using System.Net.Sockets;
  39 using System.Xml;
  40 using System.IO;
  41
  42 namespace System.ServiceModel.Dispatcher
  43 {
  44         public class ChannelDispatcher : ChannelDispatcherBase
  45         {
  46                 class EndpointDispatcherCollection : SynchronizedCollection<EndpointDispatcher>
  47                 {
  48                         public EndpointDispatcherCollection (ChannelDispatcher owner)
  49                         {
  50                                 this.owner = owner;
  51                         }
  52
  53                         ChannelDispatcher owner;
  54
  55                         protected override void ClearItems ()
  56                         {
  57                                 foreach (var ed in this)
  58                                         ed.ChannelDispatcher = null;
  59                                 base.ClearItems ();
  60                         }
  61
  62                         protected override void InsertItem (int index, EndpointDispatcher item)
  63                         {
  64                                 item.ChannelDispatcher = owner;
  65                                 base.InsertItem (index, item);
  66                         }
  67
  68                         protected override void RemoveItem (int index)
  69                         {
  70                                 if (index < Count)
  71                                         this [index].ChannelDispatcher = null;
  72                                 base.RemoveItem (index);
  73                         }
  74
  75                         protected override void SetItem (int index, EndpointDispatcher item)
  76                         {
  77                                 item.ChannelDispatcher = owner;
  78                                 base.SetItem (index, item);
  79                         }
  80                 }
  81
  82                 ServiceHostBase host;
  83
  84                 string binding_name;
  85                 Collection<IErrorHandler> error_handlers
  86                         = new Collection<IErrorHandler> ();
  87                 IChannelListener listener;
  88                 internal IDefaultCommunicationTimeouts timeouts; // FIXME: remove internal
  89                 MessageVersion message_version;
  90                 bool receive_sync, include_exception_detail_in_faults,
  91                         manual_addressing, is_tx_receive;
  92                 int max_tx_batch_size;
  93                 SynchronizedCollection<IChannelInitializer> initializers
  94                         = new SynchronizedCollection<IChannelInitializer> ();
  95                 IsolationLevel tx_isolation_level;
  96                 TimeSpan tx_timeout;
  97                 ServiceThrottle throttle;
  98
  99                 Guid identifier = Guid.NewGuid ();
 100                 ManualResetEvent async_event = new ManualResetEvent (false);
 101
 102                 ListenerLoopManager loop_manager;
 103                 SynchronizedCollection<EndpointDispatcher> endpoints;
 104
 105                 [MonoTODO ("get binding info from config")]
 106                 public ChannelDispatcher (IChannelListener listener)
 107                         : this (listener, null)
 108                 {
 109                 }
 110
 111                 public ChannelDispatcher (
 112                         IChannelListener listener, string bindingName)
 113                         : this (listener, bindingName, null)
 114                 {
 115                 }
 116
 117                 public ChannelDispatcher (
 118                         IChannelListener listener, string bindingName,
 119                         IDefaultCommunicationTimeouts timeouts)
 120                 {
 121                         if (listener == null)
 122                                 throw new ArgumentNullException ("listener");
 123                         Init (listener, bindingName, timeouts);
 124                 }
 125
 126                 private void Init (IChannelListener listener, string bindingName,
 127                         IDefaultCommunicationTimeouts timeouts)
 128                 {
 129                         this.listener = listener;
 130                         this.binding_name = bindingName;
 131                         // IChannelListener is often a ChannelListenerBase
 132                         // which implements IDefaultCommunicationTimeouts.
 133                         this.timeouts = timeouts ?? listener as IDefaultCommunicationTimeouts ?? DefaultCommunicationTimeouts.Instance;
 134                         endpoints = new EndpointDispatcherCollection (this);
 135                 }
 136
 137                 internal EndpointDispatcher InitializeServiceEndpoint (Type serviceType, ServiceEndpoint se)
 138                 {
 139                         //Attach one EndpointDispacher to the ChannelDispatcher
 140                         EndpointDispatcher ed = new EndpointDispatcher (se.Address, se.Contract.Name, se.Contract.Namespace);
 141                         this.Endpoints.Add (ed);
 142                         ed.InitializeServiceEndpoint (false, serviceType, se);
 143                         return ed;
 144                 }
 145
 146                 public string BindingName {
 147                         get { return binding_name; }
 148                 }
 149
 150                 public SynchronizedCollection<IChannelInitializer> ChannelInitializers {
 151                         get { return initializers; }
 152                 }
 153
 154                 protected internal override TimeSpan DefaultCloseTimeout {
 155                         get { return timeouts.CloseTimeout; }
 156                 }
 157
 158                 protected internal override TimeSpan DefaultOpenTimeout {
 159                         get { return timeouts.OpenTimeout; }
 160                 }
 161
 162                 public Collection<IErrorHandler> ErrorHandlers {
 163                         get { return error_handlers; }
 164                 }
 165
 166                 public SynchronizedCollection<EndpointDispatcher> Endpoints {
 167                         get { return endpoints; }
 168                 }
 169
 170                 [MonoTODO]
 171                 public bool IsTransactedAccept {
 172                         get { throw new NotImplementedException (); }
 173                 }
 174
 175                 public bool IsTransactedReceive {
 176                         get { return is_tx_receive; }
 177                         set { is_tx_receive = value; }
 178                 }
 179
 180                 public bool ManualAddressing {
 181                         get { return manual_addressing; }
 182                         set { manual_addressing = value; }
 183                 }
 184
 185                 public int MaxTransactedBatchSize {
 186                         get { return max_tx_batch_size; }
 187                         set { max_tx_batch_size = value; }
 188                 }
 189
 190                 public override ServiceHostBase Host {
 191                         get { return host; }
 192                 }
 193
 194                 public override IChannelListener Listener {
 195                         get { return listener; }
 196                 }
 197
 198                 public MessageVersion MessageVersion {
 199                         get { return message_version; }
 200                         set { message_version = value; }
 201                 }
 202
 203                 public bool ReceiveSynchronously {
 204                         get { return receive_sync; }
 205                         set {
 206                                 ThrowIfDisposedOrImmutable ();
 207                                 receive_sync = value;
 208                         }
 209                 }
 210
 211                 public bool IncludeExceptionDetailInFaults {
 212                         get { return include_exception_detail_in_faults; }
 213                         set { include_exception_detail_in_faults = value; }
 214                 }
 215
 216                 public ServiceThrottle ServiceThrottle {
 217                         get { return throttle; }
 218                         set { throttle = value; }
 219                 }
 220
 221                 public IsolationLevel TransactionIsolationLevel {
 222                         get { return tx_isolation_level; }
 223                         set { tx_isolation_level = value; }
 224                 }
 225
 226                 public TimeSpan TransactionTimeout {
 227                         get { return tx_timeout; }
 228                         set { tx_timeout = value; }
 229                 }
 230
 231                 protected internal override void Attach (ServiceHostBase host)
 232                 {
 233                         this.host = host;
 234                         var bl = listener as IChannelDispatcherBoundListener;
 235                         if (bl != null)
 236                                 bl.ChannelDispatcher = this;
 237                 }
 238
 239                 public override void CloseInput ()
 240                 {
 241                         if (loop_manager != null)
 242                                 loop_manager.CloseInput ();
 243                 }
 244
 245                 protected internal override void Detach (ServiceHostBase host)
 246                 {
 247                         this.host = null;
 248                 }
 249
 250                 protected override void OnAbort ()
 251                 {
 252                         if (loop_manager != null)
 253                                 loop_manager.Stop (TimeSpan.FromTicks (1));
 254                 }
 255
 256                 Action<TimeSpan> open_delegate;
 257                 Action<TimeSpan> close_delegate;
 258
 259                 protected override IAsyncResult OnBeginClose (TimeSpan timeout,
 260                         AsyncCallback callback, object state)
 261                 {
 262                         if (close_delegate == null)
 263                                 close_delegate = new Action<TimeSpan> (OnClose);
 264                         return close_delegate.BeginInvoke (timeout, callback, state);
 265                 }
 266
 267                 protected override IAsyncResult OnBeginOpen (TimeSpan timeout,
 268                         AsyncCallback callback, object state)
 269                 {
 270                         if (open_delegate == null)
 271                                 open_delegate = new Action<TimeSpan> (OnOpen);
 272                         return open_delegate.BeginInvoke (timeout, callback, state);
 273                 }
 274
 275                 protected override void OnClose (TimeSpan timeout)
 276                 {
 277                         if (loop_manager != null)
 278                                 loop_manager.Stop (timeout);
 279                 }
 280
 281                 protected override void OnClosed ()
 282                 {
 283                         if (host != null)
 284                                 host.ChannelDispatchers.Remove (this);
 285                         base.OnClosed ();
 286                 }
 287
 288                 protected override void OnEndClose (IAsyncResult result)
 289                 {
 290                         close_delegate.EndInvoke (result);
 291                 }
 292
 293                 protected override void OnEndOpen (IAsyncResult result)
 294                 {
 295                         open_delegate.EndInvoke (result);
 296                 }
 297
 298                 protected override void OnOpen (TimeSpan timeout)
 299                 {
 300                         if (Host == null || MessageVersion == null)
 301                                 throw new InvalidOperationException ("Service host is not attached to this ChannelDispatcher.");
 302
 303                         loop_manager.Setup (timeout);
 304                 }
 305
 306                 protected override void OnOpening ()
 307                 {
 308                         base.OnOpening ();
 309                         loop_manager = new ListenerLoopManager (this);
 310                 }
 311
 312                 protected override void OnOpened ()
 313                 {
 314                         base.OnOpened ();
 315                         StartLoop ();
 316                 }
 317
 318                 void StartLoop ()
 319                 {
 320                         // FIXME: not sure if it should be filled here.
 321                         if (ServiceThrottle == null)
 322                                 ServiceThrottle = new ServiceThrottle (this);
 323
 324                         loop_manager.Start ();
 325                 }
 326         }
 327
 328                 // isolated from ChannelDispatcher
 329                 class ListenerLoopManager
 330                 {
 331                         ChannelDispatcher owner;
 332                         AutoResetEvent throttle_wait_handle = new AutoResetEvent (false);
 333                         AutoResetEvent creator_handle = new AutoResetEvent (false);
 334                         ManualResetEvent stop_handle = new ManualResetEvent (false);
 335                         bool loop;
 336                         Thread loop_thread;
 337                         DateTime close_started;
 338                         TimeSpan close_timeout;
 339                         Func<IAsyncResult> channel_acceptor;
 340                         List<IChannel> channels = new List<IChannel> ();
 341                         AddressFilterMode address_filter_mode;
 342                         List<ISession> sessions = new List<ISession> ();
 343
 344                         public ListenerLoopManager (ChannelDispatcher owner)
 345                         {
 346                                 this.owner = owner;
 347                                 var sba = owner.Host != null ? owner.Host.Description.Behaviors.Find<ServiceBehaviorAttribute> () : null;
 348                                 if (sba != null)
 349                                         address_filter_mode = sba.AddressFilterMode;
 350                         }
 351
 352                         public void Setup (TimeSpan openTimeout)
 353                         {
 354                                 if (owner.Listener.State != CommunicationState.Created)
 355                                         throw new InvalidOperationException ("Tried to open the channel listener which is bound to ChannelDispatcher, but it is not at Created state");
 356                                 owner.Listener.Open (openTimeout);
 357
 358                                 // It is tested at Open(), but strangely it is not instantiated at this point.
 359                                 foreach (var ed in owner.Endpoints)
 360                                         if (ed.DispatchRuntime.InstanceContextProvider == null && (ed.DispatchRuntime.Type == null || ed.DispatchRuntime.Type.GetConstructor (Type.EmptyTypes) == null))
 361                                                 throw new InvalidOperationException ("There is no default constructor for the service Type in the DispatchRuntime");
 362                                 SetupChannelAcceptor ();
 363                         }
 364
 365                         public void Start ()
 366                         {
 367                                 if (loop_thread == null)
 368                                         loop_thread = new Thread (new ThreadStart (Loop));
 369                                 loop_thread.Start ();
 370                         }
 371
 372                         Func<IAsyncResult> CreateAcceptor<TChannel> (IChannelListener l) where TChannel : class, IChannel
 373                         {
 374                                 IChannelListener<TChannel> r = l as IChannelListener<TChannel>;
 375                                 if (r == null)
 376                                         return null;
 377                                 AsyncCallback callback = delegate (IAsyncResult result) {
 378                                         try {
 379                                                 ChannelAccepted (r.EndAcceptChannel (result));
 380                                         } catch (Exception ex) {
 381                                                 Logger.Error ("Exception during finishing channel acceptance.", ex);
 382                                                 creator_handle.Set ();
 383                                         }
 384                                 };
 385                                 return delegate {
 386                                         try {
 387                                                 return r.BeginAcceptChannel (callback, null);
 388                                         } catch (Exception ex) {
 389                                                 Logger.Error ("Exception during accepting channel.", ex);
 390                                                 throw;
 391                                         }
 392                                 };
 393                         }
 394
 395                         void SetupChannelAcceptor ()
 396                         {
 397                                 var l = owner.Listener;
 398                                 channel_acceptor =
 399                                         CreateAcceptor<IReplyChannel> (l) ??
 400                                         CreateAcceptor<IReplySessionChannel> (l) ??
 401                                         CreateAcceptor<IInputChannel> (l) ??
 402                                         CreateAcceptor<IInputSessionChannel> (l) ??
 403                                         CreateAcceptor<IDuplexChannel> (l) ??
 404                                         CreateAcceptor<IDuplexSessionChannel> (l);
 405                                 if (channel_acceptor == null)
 406                                         throw new InvalidOperationException (String.Format ("Unrecognized channel listener type: {0}", l.GetType ()));
 407                         }
 408
 409                         public void Stop (TimeSpan timeout)
 410                         {
 411                                 if (loop_thread == null)
 412                                         return;
 413
 414                                 close_started = DateTime.Now;
 415                                 close_timeout = timeout;
 416                                 loop = false;
 417                                 creator_handle.Set ();
 418                                 throttle_wait_handle.Set (); // break primary loop
 419                                 if (stop_handle != null) {
 420                                         stop_handle.WaitOne (timeout > TimeSpan.Zero ? timeout : TimeSpan.FromTicks (1));
 421                                         stop_handle.Close ();
 422                                         stop_handle = null;
 423                                 }
 424                                 if (owner.Listener.State != CommunicationState.Closed) {
 425                                         Logger.Warning (String.Format ("Channel listener '{0}' is not closed. Aborting.", owner.Listener.GetType ()));
 426                                         owner.Listener.Abort ();
 427                                 }
 428                                 if (loop_thread != null && loop_thread.IsAlive)
 429                                         loop_thread.Abort ();
 430                                 loop_thread = null;
 431                         }
 432
 433                         void AddChannel (IChannel ch)
 434                         {
 435                                 channels.Add (ch);
 436                                 var ich = ch as ISessionChannel<IInputSession>;
 437                                 if (ich != null && ich.Session != null) {
 438                                         lock (sessions) {
 439                                                 var session = sessions.FirstOrDefault (s => s.Id == ich.Session.Id);
 440                                                 if (session == null)
 441                                                         sessions.Add (session);
 442                                         }
 443                                 }
 444                         }
 445
 446                         void RemoveChannel (IChannel ch)
 447                         {
 448                                 channels.Remove (ch); // zonbie, if exists
 449                                 var ich = ch as ISessionChannel<IInputSession>;
 450
 451                                 if (ich != null && ich.Session != null)
 452                                         sessions.Remove (ich.Session);
 453                         }
 454
 455                         public void CloseInput ()
 456                         {
 457                                 foreach (var ch in channels.ToArray ()) {
 458                                         if (ch.State == CommunicationState.Closed) {
 459                                                 lock (channels) {
 460                                                         RemoveChannel (ch);
 461                                                 }
 462                                         }
 463                                         else {
 464                                                 try {
 465                                                         ch.Close (close_timeout - (DateTime.Now - close_started));
 466                                                 } catch (Exception ex) {
 467                                                         // FIXME: log it.
 468                                                         Logger.Error (String.Format ("Exception on closing channel ({0})", ch.GetType ()), ex);
 469                                                         ch.Abort ();
 470                                                 }
 471                                         }
 472                                 }
 473                         }
 474
 475                         void Loop ()
 476                         {
 477                                 try {
 478                                         LoopCore ();
 479                                 } catch (Exception ex) {
 480                                         Logger.Error (String.Format ("ListenerLoopManager caught an exception inside dispatcher loop, which is likely thrown by the channel listener {0}", owner.Listener), ex);
 481                                 } finally {
 482                                         if (stop_handle != null)
 483                                                 stop_handle.Set ();
 484                                 }
 485                         }
 486
 487                         void LoopCore ()
 488                         {
 489                                 loop = true;
 490
 491                                 // FIXME: use WaitForChannel() for (*only* for) transacted channel listeners.
 492                                 // http://social.msdn.microsoft.com/Forums/en-US/wcf/thread/3faa4a5e-8602-4dbe-a181-73b3f581835e
 493
 494                                 while (loop) {
 495                                         // FIXME: take MaxConcurrentCalls into consideration appropriately.
 496                                         while (loop && channels.Count < Math.Min (owner.ServiceThrottle.MaxConcurrentSessions, owner.ServiceThrottle.MaxConcurrentCalls)) {
 497                                                 // FIXME: this should not be required, but saves multi-ChannelDispatcher case (Throttling enabled) for HTTP standalone listener...
 498                                                 Thread.Sleep (100);
 499                                                 channel_acceptor ();
 500                                                 creator_handle.WaitOne (); // released by ChannelAccepted()
 501                                         }
 502                                         if (!loop)
 503                                                 break;
 504                                         throttle_wait_handle.WaitOne (); // released by IChannel.Close()
 505                                 }
 506                                 try {
 507                                         owner.Listener.Close ();
 508                                 } catch (Exception ex) {
 509                                         Logger.Error (String.Format ("Exception while closing IChannelListener ({0})", owner.Listener.GetType ()), ex);
 510                                 } finally {
 511                                         // make sure to close both listener and channels.
 512                                         owner.CloseInput ();
 513                                 }
 514                         }
 515
 516                         void ChannelAccepted (IChannel ch)
 517                         {
 518                         try {
 519                                 if (ch == null) // could happen when it was aborted
 520                                         return;
 521                                 if (!loop) {
 522                                         var dis = ch as IDisposable;
 523                                         if (dis != null)
 524                                                 dis.Dispose ();
 525                                         return;
 526                                 }
 527
 528                                 lock (channels)
 529                                         AddChannel (ch);
 530                                 ch.Opened += delegate {
 531                                         ch.Faulted += delegate {
 532                                                 lock (channels)
 533                                                         if (channels.Contains (ch))
 534                                                                 RemoveChannel (ch);
 535                                                 throttle_wait_handle.Set (); // release loop wait lock.
 536                                                 };
 537                                         ch.Closed += delegate {
 538                                                 lock (channels)
 539                                                         if (channels.Contains (ch))
 540                                                                 RemoveChannel (ch);
 541                                                 throttle_wait_handle.Set (); // release loop wait lock.
 542                                                 };
 543                                         };
 544                                 ch.Open ();
 545                         } finally {
 546                                 creator_handle.Set ();
 547                         }
 548
 549                                 ProcessRequestOrInput (ch);
 550                         }
 551
 552                         void ProcessRequestOrInput (IChannel ch)
 553                         {
 554                                 var reply = ch as IReplyChannel;
 555                                 var input = ch as IInputChannel;
 556
 557                                 if (reply != null) {
 558                                         if (owner.ReceiveSynchronously) {
 559                                                 RequestContext rc;
 560                                                 if (reply.TryReceiveRequest (owner.timeouts.ReceiveTimeout, out rc))
 561                                                         ProcessRequest (reply, rc);
 562                                         } else {
 563                                                 reply.BeginTryReceiveRequest (owner.timeouts.ReceiveTimeout, TryReceiveRequestDone, reply);
 564                                         }
 565                                 } else if (input != null) {
 566                                         if (owner.ReceiveSynchronously) {
 567                                                 Message msg;
 568                                                 if (input.TryReceive (owner.timeouts.ReceiveTimeout, out msg))
 569                                                         ProcessInput (input, msg);
 570                                         } else {
 571                                                 input.BeginTryReceive (owner.timeouts.ReceiveTimeout, TryReceiveDone, input);
 572                                         }
 573                                 }
 574                         }
 575
 576                         void TryReceiveRequestDone (IAsyncResult result)
 577                         {
 578                                 RequestContext rc;
 579                                 var reply = (IReplyChannel) result.AsyncState;
 580                                 if (reply.EndTryReceiveRequest (result, out rc))
 581                                         ProcessRequest (reply, rc);
 582                                 else
 583                                         reply.Close ();
 584                         }
 585
 586                         void TryReceiveDone (IAsyncResult result)
 587                         {
 588                                 Message msg;
 589                                 var input = (IInputChannel) result.AsyncState;
 590                                 try {
 591                                         if (input.EndTryReceive (result, out msg))
 592                                                 ProcessInput (input, msg);
 593                                         else
 594                                                 input.Close ();
 595                                 } catch (ObjectDisposedException) {
 596                                         input.Close ();
 597                                 }
 598                         }
 599
 600                         void ProcessRequest (IReplyChannel reply, RequestContext rc)
 601                         {
 602                                 try {
 603                                         var req = rc.RequestMessage;
 604                                         var ed = FindEndpointDispatcher (req);
 605                                         new InputOrReplyRequestProcessor (ed.DispatchRuntime, reply).ProcessReply (rc);
 606                                 } catch (Exception ex) {
 607                                         Message res;
 608                                         if (ProcessErrorWithHandlers (reply, ex, out res))
 609                                                 return;
 610
 611                                         if ((!(ex is SocketException)) &&
 612                                             (!(ex is XmlException)) &&
 613                                             (!(ex is IOException)))
 614                                                 rc.Reply (res);
 615
 616                                         reply.Close (owner.DefaultCloseTimeout); // close the channel
 617                                 } finally {
 618                                         if (rc != null)
 619                                                 rc.Close ();
 620                                         // unless it is closed by session/call manager, move it back to the loop to receive the next message.
 621                                         if (loop && reply.State != CommunicationState.Closed)
 622                                                 ProcessRequestOrInput (reply);
 623                                 }
 624                         }
 625
 626                         bool ProcessErrorWithHandlers (IChannel ch, Exception ex, out Message res)
 627                         {
 628                                 res = null;
 629
 630                                 foreach (var eh in owner.ErrorHandlers)
 631                                         if (eh.HandleError (ex))
 632                                                 return true; // error is handled appropriately.
 633
 634                                 Logger.Error ("An error occured, to be handled", ex);
 635
 636                                 foreach (var eh in owner.ErrorHandlers)
 637                                         eh.ProvideFault (ex, owner.MessageVersion, ref res);
 638                                 if (res == null) {
 639                                         var conv = ch.GetProperty<FaultConverter> () ?? FaultConverter.GetDefaultFaultConverter (owner.MessageVersion);
 640                                         if (!conv.TryCreateFaultMessage (ex, out res))
 641                                                 res = Message.CreateMessage (owner.MessageVersion, new FaultCode ("Receiver"), ex.Message, owner.MessageVersion.Addressing.FaultNamespace);
 642                                 }
 643
 644                                 return false;
 645                         }
 646
 647                         void ProcessInput (IInputChannel input, Message message)
 648                         {
 649                                 try {
 650                                         EndpointDispatcher candidate = null;
 651                                         candidate = FindEndpointDispatcher (message);
 652                                         new InputOrReplyRequestProcessor (candidate.DispatchRuntime, input).ProcessInput (message);
 653                                 }
 654                                 catch (Exception ex) {
 655                                         Message dummy;
 656                                         ProcessErrorWithHandlers (input, ex, out dummy);
 657                                 } finally {
 658                                         // unless it is closed by session/call manager, move it back to the loop to receive the next message.
 659                                         if (loop && input.State != CommunicationState.Closed)
 660                                                 ProcessRequestOrInput (input);
 661                                 }
 662                         }
 663
 664                         EndpointDispatcher FindEndpointDispatcher (Message message) {
 665                                 EndpointDispatcher candidate = null;
 666                                 bool hasEndpointMatch = false;
 667                                 foreach (var endpoint in owner.Endpoints) {
 668                                         if (endpoint.AddressFilter.Match (message)) {
 669                                                 hasEndpointMatch = true;
 670                                                 if (!endpoint.ContractFilter.Match (message))
 671                                                         continue;
 672                                                 var newdis = endpoint;
 673                                                 if (candidate == null || candidate.FilterPriority < newdis.FilterPriority)
 674                                                         candidate = newdis;
 675                                                 else if (candidate.FilterPriority == newdis.FilterPriority)
 676                                                         throw new MultipleFilterMatchesException ();
 677                                         }
 678                                 }
 679                                 if (candidate == null && !hasEndpointMatch) {
 680                                         if (owner.Host != null)
 681                                                 owner.Host.OnUnknownMessageReceived (message);
 682                                         // we have to return a fault to the client anyways...
 683                                         throw new EndpointNotFoundException ();
 684                                 }
 685                                 else if (candidate == null)
 686                                         // FIXME: It is not a good place to check, but anyways detach this error from EndpointNotFoundException.
 687                                         throw new ActionNotSupportedException (String.Format ("Action '{0}' did not match any operations in the target contract", message.Headers.Action));
 688
 689                                 return candidate;
 690                         }
 691                 }
 692 }