mcs/class/System.ServiceModel/System.ServiceModel/ServiceHostBase.cs

   1 //
   2 // ServiceHostBase.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.Collections.ObjectModel;
  31 using System.Linq;
  32 using System.ServiceModel.Channels;
  33 using System.ServiceModel.Configuration;
  34 using System.ServiceModel.Description;
  35 using System.ServiceModel.Dispatcher;
  36 using System.ServiceModel.Security;
  37 using System.Reflection;
  38
  39 namespace System.ServiceModel
  40 {
  41         public abstract partial class ServiceHostBase
  42                 : CommunicationObject, IExtensibleObject<ServiceHostBase>, IDisposable
  43         {
  44                 ServiceCredentials credentials;
  45                 ServiceDescription description;
  46                 UriSchemeKeyedCollection base_addresses;
  47                 TimeSpan open_timeout, close_timeout, instance_idle_timeout;
  48                 ServiceThrottle throttle;
  49                 List<InstanceContext> contexts;
  50                 ReadOnlyCollection<InstanceContext> exposed_contexts;
  51                 ChannelDispatcherCollection channel_dispatchers;
  52                 IDictionary<string,ContractDescription> contracts;
  53                 int flow_limit = int.MaxValue;
  54                 IExtensionCollection<ServiceHostBase> extensions;
  55
  56                 protected ServiceHostBase ()
  57                 {
  58                         open_timeout = DefaultOpenTimeout;
  59                         close_timeout = DefaultCloseTimeout;
  60
  61                         credentials = new ServiceCredentials ();
  62                         throttle = new ServiceThrottle ();
  63                         contexts = new List<InstanceContext> ();
  64                         exposed_contexts = new ReadOnlyCollection<InstanceContext> (contexts);
  65                         channel_dispatchers = new ChannelDispatcherCollection (this);
  66                 }
  67
  68                 public event EventHandler<UnknownMessageReceivedEventArgs>
  69                         UnknownMessageReceived;
  70
  71                 internal void OnUnknownMessageReceived (Message message)
  72                 {
  73                         if (UnknownMessageReceived != null)
  74                                 UnknownMessageReceived (this, new UnknownMessageReceivedEventArgs (message));
  75                         else
  76                                 // FIXME: better be logged
  77                                 throw new EndpointNotFoundException (String.Format ("The request message has the target '{0}' with action '{1}' which is not reachable in this service contract", message.Headers.To, message.Headers.Action));
  78                 }
  79
  80                 public ReadOnlyCollection<Uri> BaseAddresses {
  81                         get {
  82                                 if (base_addresses == null)
  83                                         base_addresses = new UriSchemeKeyedCollection ();
  84                                 return new ReadOnlyCollection<Uri> (base_addresses.InternalItems);
  85                         }
  86                 }
  87
  88                 internal Uri CreateUri (string scheme, Uri relativeUri)
  89                 {
  90                         Uri baseUri = base_addresses.Contains (scheme) ? base_addresses [scheme] : null;
  91
  92                         if (relativeUri == null)
  93                                 return baseUri;
  94                         if (relativeUri.IsAbsoluteUri)
  95                                 return relativeUri;
  96                         if (baseUri == null)
  97                                 return null;
  98                         var s = relativeUri.ToString ();
  99                         if (s.Length == 0)
 100                                 return baseUri;
 101                         var l = baseUri.LocalPath;
 102                         var r = relativeUri.ToString ();
 103
 104                         if (l.Length > 0 && l [l.Length - 1] != '/' && r [0] != '/')
 105                                 return new Uri (String.Concat (baseUri.ToString (), "/", r));
 106                         else
 107                                 return new Uri (String.Concat (baseUri.ToString (), r));
 108                 }
 109
 110                 public ChannelDispatcherCollection ChannelDispatchers {
 111                         get { return channel_dispatchers; }
 112                 }
 113
 114                 public ServiceAuthorizationBehavior Authorization {
 115                         get;
 116                         private set;
 117                 }
 118
 119                 [MonoTODO]
 120                 public ServiceCredentials Credentials {
 121                         get { return credentials; }
 122                 }
 123
 124                 public ServiceDescription Description {
 125                         get { return description; }
 126                 }
 127
 128                 protected IDictionary<string,ContractDescription> ImplementedContracts {
 129                         get { return contracts; }
 130                 }
 131
 132                 [MonoTODO]
 133                 public IExtensionCollection<ServiceHostBase> Extensions {
 134                         get {
 135                                 if (extensions == null)
 136                                         extensions = new ExtensionCollection<ServiceHostBase> (this);
 137                                 return extensions;
 138                         }
 139                 }
 140
 141                 protected internal override TimeSpan DefaultCloseTimeout {
 142                         get { return DefaultCommunicationTimeouts.Instance.CloseTimeout; }
 143                 }
 144
 145                 protected internal override TimeSpan DefaultOpenTimeout {
 146                         get { return DefaultCommunicationTimeouts.Instance.OpenTimeout; }
 147                 }
 148
 149                 public TimeSpan CloseTimeout {
 150                         get { return close_timeout; }
 151                         set { close_timeout = value; }
 152                 }
 153
 154                 public TimeSpan OpenTimeout {
 155                         get { return open_timeout; }
 156                         set { open_timeout = value; }
 157                 }
 158
 159                 public int ManualFlowControlLimit {
 160                         get { return flow_limit; }
 161                         set { flow_limit = value; }
 162                 }
 163
 164                 protected void AddBaseAddress (Uri baseAddress)
 165                 {
 166                         if (base_addresses == null)
 167                                 throw new InvalidOperationException ("Base addresses must be added before the service description is initialized");
 168                         base_addresses.Add (baseAddress);
 169                 }
 170
 171                 public ServiceEndpoint AddServiceEndpoint (
 172                         string implementedContract, Binding binding, string address)
 173                 {
 174                         return AddServiceEndpoint (implementedContract,
 175                                 binding,
 176                                 new Uri (address, UriKind.RelativeOrAbsolute));
 177                 }
 178
 179                 public ServiceEndpoint AddServiceEndpoint (
 180                         string implementedContract, Binding binding,
 181                         string address, Uri listenUri)
 182                 {
 183                         Uri uri = new Uri (address, UriKind.RelativeOrAbsolute);
 184                         return AddServiceEndpoint (
 185                                 implementedContract, binding, uri, listenUri);
 186                 }
 187
 188                 public ServiceEndpoint AddServiceEndpoint (
 189                         string implementedContract, Binding binding,
 190                         Uri address)
 191                 {
 192                         return AddServiceEndpoint (implementedContract, binding, address, address);
 193                 }
 194
 195                 public ServiceEndpoint AddServiceEndpoint (
 196                         string implementedContract, Binding binding,
 197                         Uri address, Uri listenUri)
 198                 {
 199                         EndpointAddress ea = BuildEndpointAddress (address, binding);
 200                         ContractDescription cd = GetContract (implementedContract, binding.Namespace == "http://schemas.microsoft.com/ws/2005/02/mex/bindings");
 201                         if (cd == null)
 202                                 throw new InvalidOperationException (String.Format ("Contract '{0}' was not found in the implemented contracts in this service host.", implementedContract));
 203                         return AddServiceEndpointCore (cd, binding, ea, listenUri);
 204                 }
 205
 206                 Type PopulateType (string typeName)
 207                 {
 208                         Type type = Type.GetType (typeName);
 209                         if (type != null)
 210                                 return type;
 211                         foreach (ContractDescription cd in ImplementedContracts.Values) {
 212                                 type = cd.ContractType.Assembly.GetType (typeName);
 213                                 if (type != null)
 214                                         return type;
 215                         }
 216                         return null;
 217                 }
 218
 219                 ContractDescription mex_contract, help_page_contract;
 220
 221                 ContractDescription GetContract (string name, bool mexBinding)
 222                 {
 223                         // FIXME: not sure if they should really be special cases.
 224                         switch (name) {
 225                         case "IHttpGetHelpPageAndMetadataContract":
 226                                 if (help_page_contract == null)
 227                                         help_page_contract = ContractDescription.GetContract (typeof (IHttpGetHelpPageAndMetadataContract));
 228                                 return help_page_contract;
 229                         case "IMetadataExchange":
 230                                 // this is certainly looking special (or we may
 231                                 // be missing something around ServiceMetadataExtension).
 232                                 // It seems .NET WCF has some "infrastructure"
 233                                 // endpoints. .NET ServiceHost fails to Open()
 234                                 // if it was added only IMetadataExchange
 235                                 // endpoint (and you'll see the word
 236                                 // "infrastructure" in the exception message).
 237                                 if (mexBinding && Description.Behaviors.Find<ServiceMetadataBehavior> () == null)
 238                                         break;
 239                                 if (mex_contract == null)
 240                                         mex_contract = ContractDescription.GetContract (typeof (IMetadataExchange));
 241                                 return mex_contract;
 242                         }
 243
 244                         Type type = PopulateType (name);
 245                         if (type == null)
 246                                 return null;
 247
 248                         foreach (ContractDescription cd in ImplementedContracts.Values) {
 249                                 // This check is a negative side effect of the above match-by-name design.
 250                                 if (cd.ContractType == typeof (IMetadataExchange))
 251                                         continue;
 252
 253                                 if (cd.ContractType == type ||
 254                                     cd.ContractType.IsSubclassOf (type) ||
 255                                     type.IsInterface && cd.ContractType.GetInterface (type.FullName) == type)
 256                                         return cd;
 257                         }
 258                         return null;
 259                 }
 260
 261                 internal EndpointAddress BuildEndpointAddress (Uri address, Binding binding)
 262                 {
 263                         if (!address.IsAbsoluteUri) {
 264                                 // Find a Base address with matching scheme,
 265                                 // and build new absolute address
 266                                 if (!base_addresses.Contains (binding.Scheme))
 267                                         throw new InvalidOperationException (String.Format ("Could not find base address that matches Scheme {0} for endpoint {1}", binding.Scheme, binding.Name));
 268
 269                                 Uri baseaddr = base_addresses [binding.Scheme];
 270
 271                                 if (!baseaddr.AbsoluteUri.EndsWith ("/") && address.OriginalString.Length > 0) // with empty URI it should not add '/' to possible file name of the absolute URI
 272                                         baseaddr = new Uri (baseaddr.AbsoluteUri + "/");
 273                                 address = new Uri (baseaddr, address);
 274                         }
 275                         return new EndpointAddress (address);
 276                 }
 277
 278                 internal ServiceEndpoint AddServiceEndpointCore (
 279                         ContractDescription cd, Binding binding, EndpointAddress address, Uri listenUri)
 280                 {
 281                         foreach (ServiceEndpoint e in Description.Endpoints)
 282                                 if (e.Contract == cd && e.Binding == binding && e.Address == address && e.ListenUri.Equals (listenUri))
 283                                         return e;
 284                         ServiceEndpoint se = new ServiceEndpoint (cd, binding, address);
 285                         se.ListenUri = listenUri.IsAbsoluteUri ? listenUri : new Uri (address.Uri, listenUri);
 286                         Description.Endpoints.Add (se);
 287                         return se;
 288                 }
 289
 290                 protected virtual void ApplyConfiguration ()
 291                 {
 292                         if (Description == null)
 293                                 throw new InvalidOperationException ("ApplyConfiguration requires that the Description property be initialized. Either provide a valid ServiceDescription in the CreateDescription method or override the ApplyConfiguration method to provide an alternative implementation");
 294
 295                         ServiceElement service = GetServiceElement ();
 296
 297                         //TODO: Should we call here LoadServiceElement ?
 298                         if (service != null) {
 299
 300                                 //base addresses
 301                                 HostElement host = service.Host;
 302                                 foreach (BaseAddressElement baseAddress in host.BaseAddresses) {
 303                                         AddBaseAddress (new Uri (baseAddress.BaseAddress));
 304                                 }
 305
 306                                 // behaviors
 307                                 // TODO: use EvaluationContext of ServiceElement.
 308                                 ServiceBehaviorElement behavior = ConfigUtil.BehaviorsSection.ServiceBehaviors [service.BehaviorConfiguration];
 309                                 if (behavior != null) {
 310                                         foreach (var bxe in behavior) {
 311                                                 IServiceBehavior b = (IServiceBehavior) bxe.CreateBehavior ();
 312                                                 Description.Behaviors.Add (b);
 313                                         }
 314                                 }
 315
 316                                 // services
 317                                 foreach (ServiceEndpointElement endpoint in service.Endpoints) {
 318                                         ServiceEndpoint se = AddServiceEndpoint (
 319                                                 endpoint.Contract,
 320                                                 ConfigUtil.CreateBinding (endpoint.Binding, endpoint.BindingConfiguration),
 321                                                 endpoint.Address.ToString ());
 322                                         // endpoint behaviors
 323                                         EndpointBehaviorElement epbehavior = ConfigUtil.BehaviorsSection.EndpointBehaviors [endpoint.BehaviorConfiguration];
 324                                         if (epbehavior != null)
 325                                                 foreach (var bxe in epbehavior) {
 326                                                         IEndpointBehavior b = (IEndpointBehavior) bxe.CreateBehavior ();
 327                                                         se.Behaviors.Add (b);
 328                                         }
 329                                 }
 330                         }
 331                         // TODO: consider commonBehaviors here
 332
 333                         // ensure ServiceAuthorizationBehavior
 334                         Authorization = Description.Behaviors.Find<ServiceAuthorizationBehavior> ();
 335                         if (Authorization == null) {
 336                                 Authorization = new ServiceAuthorizationBehavior ();
 337                                 Description.Behaviors.Add (Authorization);
 338                         }
 339
 340                         // ensure ServiceDebugBehavior
 341                         ServiceDebugBehavior debugBehavior = Description.Behaviors.Find<ServiceDebugBehavior> ();
 342                         if (debugBehavior == null) {
 343                                 debugBehavior = new ServiceDebugBehavior ();
 344                                 Description.Behaviors.Add (debugBehavior);
 345                         }
 346                 }
 347
 348                 private ServiceElement GetServiceElement() {
 349                         Type serviceType = Description.ServiceType;
 350                         if (serviceType == null)
 351                                 return null;
 352
 353                         return ConfigUtil.ServicesSection.Services [serviceType.FullName];
 354                 }
 355
 356                 protected abstract ServiceDescription CreateDescription (
 357                         out IDictionary<string,ContractDescription> implementedContracts);
 358
 359                 protected void InitializeDescription (UriSchemeKeyedCollection baseAddresses)
 360                 {
 361                         this.base_addresses = baseAddresses;
 362                         IDictionary<string,ContractDescription> retContracts;
 363                         description = CreateDescription (out retContracts);
 364                         contracts = retContracts;
 365
 366                         ApplyConfiguration ();
 367                 }
 368
 369                 protected virtual void InitializeRuntime ()
 370                 {
 371                         //First validate the description, which should call all behaviors
 372                         //'Validate' method.
 373                         ValidateDescription ();
 374
 375                         //Build all ChannelDispatchers, one dispatcher per user configured EndPoint.
 376                         //We must keep thet ServiceEndpoints as a seperate collection, since the user
 377                         //can change the collection in the description during the behaviors events.
 378                         ServiceEndpoint[] endPoints = new ServiceEndpoint[Description.Endpoints.Count];
 379                         Description.Endpoints.CopyTo (endPoints, 0);
 380                         var builder = new DispatcherBuilder ();
 381                         foreach (ServiceEndpoint se in endPoints) {
 382
 383                                 var commonParams = new BindingParameterCollection ();
 384                                 foreach (IServiceBehavior b in Description.Behaviors)
 385                                         b.AddBindingParameters (Description, this, Description.Endpoints, commonParams);
 386
 387                                 var channel = builder.BuildChannelDispatcher (Description.ServiceType, se, commonParams);
 388                                 if (!ChannelDispatchers.Contains (channel))
 389                                         ChannelDispatchers.Add (channel);
 390                         }
 391
 392                         //After the ChannelDispatchers are created, and attached to the service host
 393                         //Apply dispatching behaviors.
 394                         foreach (IServiceBehavior b in Description.Behaviors)
 395                                 b.ApplyDispatchBehavior (Description, this);
 396
 397                         builder.ApplyDispatchBehaviors ();
 398                 }
 399
 400                 private void ValidateDescription ()
 401                 {
 402                         foreach (IServiceBehavior b in Description.Behaviors)
 403                                 b.Validate (Description, this);
 404                         foreach (ServiceEndpoint endPoint in Description.Endpoints)
 405                                 endPoint.Validate ();
 406
 407                         if (Description.Endpoints.FirstOrDefault (e => e.Contract != mex_contract) == null)
 408                                 throw new InvalidOperationException ("The ServiceHost must have at least one application endpoint (that does not include metadata exchange contract) defined by either configuration, behaviors or call to AddServiceEndpoint methods.");
 409                 }
 410
 411                 [MonoTODO]
 412                 protected void LoadConfigurationSection (ServiceElement element)
 413                 {
 414                         ServicesSection services = ConfigUtil.ServicesSection;
 415                 }
 416
 417                 [MonoTODO]
 418                 protected override sealed void OnAbort ()
 419                 {
 420                 }
 421
 422                 Action<TimeSpan> close_delegate;
 423                 Action<TimeSpan> open_delegate;
 424
 425                 protected override sealed IAsyncResult OnBeginClose (
 426                         TimeSpan timeout, AsyncCallback callback, object state)
 427                 {
 428                         if (close_delegate != null)
 429                                 close_delegate = new Action<TimeSpan> (OnClose);
 430                         return close_delegate.BeginInvoke (timeout, callback, state);
 431                 }
 432
 433                 protected override sealed IAsyncResult OnBeginOpen (
 434                         TimeSpan timeout, AsyncCallback callback, object state)
 435                 {
 436                         if (open_delegate == null)
 437                                 open_delegate = new Action<TimeSpan> (OnOpen);
 438                         return open_delegate.BeginInvoke (timeout, callback, state);
 439                 }
 440
 441                 protected override void OnClose (TimeSpan timeout)
 442                 {
 443                         DateTime start = DateTime.Now;
 444                         ReleasePerformanceCounters ();
 445                         List<ChannelDispatcherBase> l = new List<ChannelDispatcherBase> (ChannelDispatchers);
 446                         foreach (ChannelDispatcherBase e in l) {
 447                                 try {
 448                                         TimeSpan ts = timeout - (DateTime.Now - start);
 449                                         if (ts < TimeSpan.Zero)
 450                                                 e.Abort ();
 451                                         else
 452                                                 e.Close (ts);
 453                                 } catch (Exception ex) {
 454                                         Console.WriteLine ("ServiceHostBase failed to close the channel dispatcher:");
 455                                         Console.WriteLine (ex);
 456                                 }
 457                         }
 458                 }
 459
 460                 protected override sealed void OnOpen (TimeSpan timeout)
 461                 {
 462                         DateTime start = DateTime.Now;
 463                         InitializeRuntime ();
 464                         foreach (var cd in ChannelDispatchers)
 465                                 cd.Open (timeout - (DateTime.Now - start));
 466
 467                         // FIXME: remove this hack. It should make sure that each ChannelDispatcher's loop has started, using WaitHandle.WaitAll() or something similar.
 468                         System.Threading.Thread.Sleep (300);
 469                 }
 470
 471                 protected override void OnEndClose (IAsyncResult result)
 472                 {
 473                         if (close_delegate == null)
 474                                 throw new InvalidOperationException ("Async close operation has not started");
 475                         close_delegate.EndInvoke (result);
 476                 }
 477
 478                 protected override sealed void OnEndOpen (IAsyncResult result)
 479                 {
 480                         if (open_delegate == null)
 481                                 throw new InvalidOperationException ("Aync open operation has not started");
 482                         open_delegate.EndInvoke (result);
 483                 }
 484
 485                 protected override void OnOpened ()
 486                 {
 487                         base.OnOpened ();
 488                 }
 489
 490                 [MonoTODO]
 491                 protected void ReleasePerformanceCounters ()
 492                 {
 493                 }
 494
 495                 void IDisposable.Dispose ()
 496                 {
 497                         Close ();
 498                 }
 499
 500                 /*
 501                 class SyncMethodInvoker : IOperationInvoker
 502                 {
 503                         readonly MethodInfo _methodInfo;
 504                         public SyncMethodInvoker (MethodInfo methodInfo) {
 505                                 _methodInfo = methodInfo;
 506                         }
 507
 508                         #region IOperationInvoker Members
 509
 510                         public bool IsSynchronous {
 511                                 get { return true; }
 512                         }
 513
 514                         public object [] AllocateParameters () {
 515                                 return new object [_methodInfo.GetParameters ().Length];
 516                         }
 517
 518                         public object Invoke (object instance, object [] parameters)
 519             {
 520                                 return _methodInfo.Invoke (instance, parameters);
 521                         }
 522
 523                         public IAsyncResult InvokeBegin (object instance, object [] inputs, AsyncCallback callback, object state) {
 524                                 throw new NotSupportedException ();
 525                         }
 526
 527                         public object InvokeEnd (object instance, out object [] outputs, IAsyncResult result) {
 528                                 throw new NotSupportedException ();
 529                         }
 530
 531                         #endregion
 532                 }
 533
 534                 class AsyncMethodInvoker : IOperationInvoker
 535                 {
 536                         readonly MethodInfo _beginMethodInfo, _endMethodInfo;
 537                         public AsyncMethodInvoker (MethodInfo beginMethodInfo, MethodInfo endMethodInfo) {
 538                                 _beginMethodInfo = beginMethodInfo;
 539                                 _endMethodInfo = endMethodInfo;
 540                         }
 541
 542                         #region IOperationInvoker Members
 543
 544                         public bool IsSynchronous {
 545                                 get { return false; }
 546                         }
 547
 548                         public object [] AllocateParameters () {
 549                                 return new object [_beginMethodInfo.GetParameters ().Length - 2 + _endMethodInfo.GetParameters().Length-1];
 550                         }
 551
 552                         public object Invoke (object instance, object [] parameters) {
 553                                 throw new NotImplementedException ("Can't invoke async method synchronously");
 554                                 //BUGBUG: need to differentiate between input and output parameters.
 555                                 IAsyncResult asyncResult = InvokeBegin(instance, parameters, delegate(IAsyncResult ignore) { }, null);
 556                                 asyncResult.AsyncWaitHandle.WaitOne();
 557                                 return InvokeEnd(instance, out parameters, asyncResult);
 558                         }
 559
 560                         public IAsyncResult InvokeBegin (object instance, object [] inputs, AsyncCallback callback, object state) {
 561                                 if (inputs.Length + 2 != _beginMethodInfo.GetParameters ().Length)
 562                                         throw new ArgumentException ("Wrong number of input parameters");
 563                                 object [] fullargs = new object [_beginMethodInfo.GetParameters ().Length];
 564                                 Array.Copy (inputs, fullargs, inputs.Length);
 565                                 fullargs [inputs.Length] = callback;
 566                                 fullargs [inputs.Length + 1] = state;
 567                                 return (IAsyncResult) _beginMethodInfo.Invoke (instance, fullargs);
 568                         }
 569
 570                         public object InvokeEnd (object instance, out object [] outputs, IAsyncResult asyncResult) {
 571                                 outputs = new object [_endMethodInfo.GetParameters ().Length - 1];
 572                                 object [] fullargs = new object [_endMethodInfo.GetParameters ().Length];
 573                                 fullargs [outputs.Length] = asyncResult;
 574                                 object result = _endMethodInfo.Invoke (instance, fullargs);
 575                                 Array.Copy (fullargs, outputs, outputs.Length);
 576                                 return result;
 577                         }
 578
 579                         #endregion
 580                 }
 581                 */
 582         }
 583
 584         /// <summary>
 585         ///  Builds ChannelDispatchers as appropriate to service the service endpoints.
 586         /// </summary>
 587         /// <remarks>Will re-use ChannelDispatchers when two endpoint uris are the same</remarks>
 588         partial class DispatcherBuilder
 589         {
 590                 List<ChannelDispatcher> built_dispatchers = new List<ChannelDispatcher> ();
 591                 Dictionary<ServiceEndpoint, EndpointDispatcher> ep_to_dispatcher_ep = new Dictionary<ServiceEndpoint, EndpointDispatcher> ();
 592
 593                 internal ChannelDispatcher BuildChannelDispatcher (Type serviceType, ServiceEndpoint se, BindingParameterCollection commonParams)
 594                 {
 595                         //Let all behaviors add their binding parameters
 596                         AddBindingParameters (commonParams, se);
 597
 598                         // See if there's an existing channel that matches this endpoint
 599                         ChannelDispatcher cd = FindExistingDispatcher (se);
 600                         EndpointDispatcher ep;
 601                         if (cd != null) {
 602                                 ep = cd.InitializeServiceEndpoint (serviceType, se);
 603                         } else {
 604                                 // Use the binding parameters to build the channel listener and Dispatcher.
 605                                 IChannelListener lf = BuildListener (se, commonParams);
 606                                 cd = new ChannelDispatcher (
 607                                         lf, se.Binding.Name);
 608                                 ep = cd.InitializeServiceEndpoint (serviceType, se);
 609                                 built_dispatchers.Add (cd);
 610                         }
 611                         ep_to_dispatcher_ep[se] = ep;
 612                         return cd;
 613                 }
 614
 615                 ChannelDispatcher FindExistingDispatcher (ServiceEndpoint se)
 616                 {
 617                         return built_dispatchers.FirstOrDefault ((ChannelDispatcher cd) => (cd.Listener.Uri.Equals (se.ListenUri)) && cd.MessageVersion.Equals (se.Binding.MessageVersion));
 618                 }
 619
 620                 internal void ApplyDispatchBehaviors ()
 621                 {
 622                         foreach (KeyValuePair<ServiceEndpoint, EndpointDispatcher> val in ep_to_dispatcher_ep)
 623                                 ApplyDispatchBehavior (val.Value, val.Key);
 624                 }
 625
 626                 private void ApplyDispatchBehavior (EndpointDispatcher ed, ServiceEndpoint endPoint)
 627                 {
 628                         foreach (IContractBehavior b in endPoint.Contract.Behaviors)
 629                                 b.ApplyDispatchBehavior (endPoint.Contract, endPoint, ed.DispatchRuntime);
 630                         foreach (IEndpointBehavior b in endPoint.Behaviors)
 631                                 b.ApplyDispatchBehavior (endPoint, ed);
 632                         foreach (OperationDescription operation in endPoint.Contract.Operations) {
 633                                 foreach (IOperationBehavior b in operation.Behaviors)
 634                                         b.ApplyDispatchBehavior (operation, ed.DispatchRuntime.Operations [operation.Name]);
 635                         }
 636
 637                 }
 638
 639                 private void AddBindingParameters (BindingParameterCollection commonParams, ServiceEndpoint endPoint) {
 640
 641                         commonParams.Add (ChannelProtectionRequirements.CreateFromContract (endPoint.Contract));
 642
 643                         foreach (IContractBehavior b in endPoint.Contract.Behaviors)
 644                                 b.AddBindingParameters (endPoint.Contract, endPoint, commonParams);
 645                         foreach (IEndpointBehavior b in endPoint.Behaviors)
 646                                 b.AddBindingParameters (endPoint, commonParams);
 647                         foreach (OperationDescription operation in endPoint.Contract.Operations) {
 648                                 foreach (IOperationBehavior b in operation.Behaviors)
 649                                         b.AddBindingParameters (operation, commonParams);
 650                         }
 651                 }
 652
 653                 static IChannelListener BuildListener (ServiceEndpoint se,
 654                         BindingParameterCollection pl)
 655                 {
 656                         Binding b = se.Binding;
 657                         if (b.CanBuildChannelListener<IReplySessionChannel> (pl))
 658                                 return b.BuildChannelListener<IReplySessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 659                         if (b.CanBuildChannelListener<IReplyChannel> (pl))
 660                                 return b.BuildChannelListener<IReplyChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 661                         if (b.CanBuildChannelListener<IInputSessionChannel> (pl))
 662                                 return b.BuildChannelListener<IInputSessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 663                         if (b.CanBuildChannelListener<IInputChannel> (pl))
 664                                 return b.BuildChannelListener<IInputChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 665
 666                         if (b.CanBuildChannelListener<IDuplexChannel> (pl))
 667                                 return b.BuildChannelListener<IDuplexChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 668                         if (b.CanBuildChannelListener<IDuplexSessionChannel> (pl))
 669                                 return b.BuildChannelListener<IDuplexSessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 670                         throw new InvalidOperationException ("None of the listener channel types is supported");
 671                 }
 672         }
 673 }