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.ServiceModel.Channels;
  32 using System.ServiceModel.Configuration;
  33 using System.ServiceModel.Description;
  34 using System.ServiceModel.Dispatcher;
  35 using System.ServiceModel.Security;
  36 using System.Reflection;
  37
  38 namespace System.ServiceModel
  39 {
  40         public abstract class ServiceHostBase
  41                 : CommunicationObject, IExtensibleObject<ServiceHostBase>, IDisposable
  42         {
  43                 ServiceCredentials credentials;
  44                 ServiceDescription description;
  45                 UriSchemeKeyedCollection base_addresses;
  46                 TimeSpan open_timeout, close_timeout, instance_idle_timeout;
  47                 ServiceThrottle throttle;
  48                 List<InstanceContext> contexts;
  49                 ReadOnlyCollection<InstanceContext> exposed_contexts;
  50                 ChannelDispatcherCollection channel_dispatchers;
  51                 IDictionary<string,ContractDescription> contracts;
  52                 int flow_limit = int.MaxValue;
  53                 IExtensionCollection<ServiceHostBase> extensions;
  54
  55                 protected ServiceHostBase ()
  56                 {
  57                         open_timeout = DefaultOpenTimeout;
  58                         close_timeout = DefaultCloseTimeout;
  59
  60                         credentials = new ServiceCredentials ();
  61                         throttle = new ServiceThrottle ();
  62                         contexts = new List<InstanceContext> ();
  63                         exposed_contexts = new ReadOnlyCollection<InstanceContext> (contexts);
  64                         channel_dispatchers = new ChannelDispatcherCollection (this);
  65                 }
  66
  67                 public event EventHandler<UnknownMessageReceivedEventArgs>
  68                         UnknownMessageReceived;
  69
  70                 public ReadOnlyCollection<Uri> BaseAddresses {
  71                         get { return new ReadOnlyCollection<Uri> (base_addresses.InternalItems); }
  72                 }
  73
  74                 internal Uri CreateUri (string sheme, Uri relatieUri) {
  75                         Uri baseUri = base_addresses.Contains (sheme) ? base_addresses [sheme] : null;
  76
  77                         if (relatieUri == null)
  78                                 return baseUri;
  79                         if (relatieUri.IsAbsoluteUri)
  80                                 return relatieUri;
  81                         if (baseUri == null)
  82                                 return null;
  83                         return new Uri (baseUri, relatieUri);
  84                 }
  85
  86                 public ChannelDispatcherCollection ChannelDispatchers {
  87                         get { return channel_dispatchers; }
  88                 }
  89
  90                 public ServiceAuthorizationBehavior Authorization {
  91                         get;
  92                         private set;
  93                 }
  94
  95                 [MonoTODO]
  96                 public ServiceCredentials Credentials {
  97                         get { return credentials; }
  98                 }
  99
 100                 public ServiceDescription Description {
 101                         get { return description; }
 102                 }
 103
 104                 protected IDictionary<string,ContractDescription> ImplementedContracts {
 105                         get { return contracts; }
 106                 }
 107
 108                 [MonoTODO]
 109                 public IExtensionCollection<ServiceHostBase> Extensions {
 110                         get {
 111                                 if (extensions == null)
 112                                         extensions = new ExtensionCollection<ServiceHostBase> (this);
 113                                 return extensions;
 114                         }
 115                 }
 116
 117                 protected internal override TimeSpan DefaultCloseTimeout {
 118                         get { return DefaultCommunicationTimeouts.Instance.CloseTimeout; }
 119                 }
 120
 121                 protected internal override TimeSpan DefaultOpenTimeout {
 122                         get { return DefaultCommunicationTimeouts.Instance.OpenTimeout; }
 123                 }
 124
 125                 public TimeSpan CloseTimeout {
 126                         get { return close_timeout; }
 127                         set { close_timeout = value; }
 128                 }
 129
 130                 public TimeSpan OpenTimeout {
 131                         get { return open_timeout; }
 132                         set { open_timeout = value; }
 133                 }
 134
 135                 public int ManualFlowControlLimit {
 136                         get { return flow_limit; }
 137                         set { flow_limit = value; }
 138                 }
 139
 140                 public ServiceEndpoint AddServiceEndpoint (
 141                         string implementedContract, Binding binding, string address)
 142                 {
 143                         return AddServiceEndpoint (implementedContract,
 144                                 binding,
 145                                 new Uri (address, UriKind.RelativeOrAbsolute));
 146                 }
 147
 148                 public ServiceEndpoint AddServiceEndpoint (
 149                         string implementedContract, Binding binding,
 150                         string address, Uri listenUri)
 151                 {
 152                         Uri uri = new Uri (address, UriKind.RelativeOrAbsolute);
 153                         return AddServiceEndpoint (
 154                                 implementedContract, binding, uri, uri);
 155                 }
 156
 157                 public ServiceEndpoint AddServiceEndpoint (
 158                         string implementedContract, Binding binding,
 159                         Uri address)
 160                 {
 161                         return AddServiceEndpoint (implementedContract, binding, address, address);
 162                 }
 163
 164                 public ServiceEndpoint AddServiceEndpoint (
 165                         string implementedContract, Binding binding,
 166                         Uri address, Uri listenUri)
 167                 {
 168                         EndpointAddress ea = BuildEndpointAddress (address, binding);
 169                         ContractDescription cd = GetContract (implementedContract);
 170                         if (cd == null)
 171                                 throw new InvalidOperationException (String.Format ("Contract '{0}' was not found in the implemented contracts in this service host.", implementedContract));
 172                         return AddServiceEndpointCore (cd, binding, ea, listenUri);
 173                 }
 174
 175                 Type PopulateType (string typeName)
 176                 {
 177                         Type type = Type.GetType (typeName);
 178                         if (type != null)
 179                                 return type;
 180                         foreach (ContractDescription cd in ImplementedContracts.Values) {
 181                                 type = cd.ContractType.Assembly.GetType (typeName);
 182                                 if (type != null)
 183                                         return type;
 184                         }
 185                         return null;
 186                 }
 187
 188                 ContractDescription GetContract (string typeName)
 189                 {
 190                         //FIXME: hack hack hack
 191                         ImplementedContracts ["IHttpGetHelpPageAndMetadataContract"] =
 192                                 ContractDescription.GetContract (typeof (IHttpGetHelpPageAndMetadataContract));
 193
 194                         // FIXME: As long as I tried, *only* IMetadataExchange
 195                         // is the exception case that does not require full
 196                         // type name. Hence I treat it as a special case.
 197                         if (typeName == ServiceMetadataBehavior.MexContractName) {
 198                                 if (!Description.Behaviors.Contains (typeof (ServiceMetadataBehavior)) && Array.IndexOf (Description.ServiceType.GetInterfaces (), typeof (IMetadataExchange)) < 0)
 199                                         throw new InvalidOperationException (
 200                                                 "Add ServiceMetadataBehavior to the ServiceHost to add a endpoint for IMetadataExchange contract.");
 201
 202                                 ImplementedContracts [ServiceMetadataBehavior.MexContractName] =
 203                                         ContractDescription.GetContract (typeof (IMetadataExchange));
 204
 205                                 foreach (ContractDescription cd in ImplementedContracts.Values)
 206                                         if (cd.ContractType == typeof (IMetadataExchange))
 207                                                 return cd;
 208                                 return null;
 209                         }
 210
 211                         Type type = PopulateType (typeName);
 212                         if (type == null)
 213                                 return null;
 214
 215                         foreach (ContractDescription cd in ImplementedContracts.Values) {
 216                                 // FIXME: This check is a negative side effect
 217                                 // of the above hack.
 218                                 if (cd.ContractType == typeof (IMetadataExchange))
 219                                         continue;
 220
 221                                 if (cd.ContractType == type ||
 222                                     cd.ContractType.IsSubclassOf (type) ||
 223                                     type.IsInterface && cd.ContractType.GetInterface (type.FullName) == type)
 224                                         return cd;
 225                         }
 226                         return null;
 227                 }
 228
 229                 internal EndpointAddress BuildEndpointAddress (Uri address, Binding binding)
 230                 {
 231                         if (!address.IsAbsoluteUri) {
 232                                 // Find a Base address with matching scheme,
 233                                 // and build new absolute address
 234                                 if (!base_addresses.Contains (binding.Scheme))
 235                                         throw new InvalidOperationException (String.Format ("Could not find base address that matches Scheme {0} for endpoint {1}", binding.Scheme, binding.Name));
 236
 237                                 Uri baseaddr = base_addresses [binding.Scheme];
 238
 239                                 if (!baseaddr.AbsoluteUri.EndsWith ("/"))
 240                                         baseaddr = new Uri (baseaddr.AbsoluteUri + "/");
 241                                 address = new Uri (baseaddr, address);
 242                         }
 243                         return new EndpointAddress (address);
 244                 }
 245
 246                 internal ServiceEndpoint AddServiceEndpointCore (
 247                         ContractDescription cd, Binding binding, EndpointAddress address, Uri listenUri)
 248                 {
 249                         foreach (ServiceEndpoint e in Description.Endpoints)
 250                                 if (e.Contract == cd)
 251                                         return e;
 252                         ServiceEndpoint se = new ServiceEndpoint (cd, binding, address);
 253                         se.ListenUri = listenUri.IsAbsoluteUri ? listenUri : new Uri (address.Uri, listenUri);
 254                         Description.Endpoints.Add (se);
 255                         return se;
 256                 }
 257
 258                 [MonoTODO]
 259                 protected virtual void ApplyConfiguration ()
 260                 {
 261                         if (Description == null)
 262                                 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");
 263
 264                         ServiceElement service = GetServiceElement ();
 265
 266                         //TODO: Should we call here LoadServiceElement ?
 267                         if (service != null) {
 268
 269                                 //base addresses
 270                                 HostElement host = service.Host;
 271                                 foreach (BaseAddressElement baseAddress in host.BaseAddresses) {
 272                                         this.base_addresses.Add (new Uri (baseAddress.BaseAddress));
 273                                 }
 274
 275                                 // services
 276                                 foreach (ServiceEndpointElement endpoint in service.Endpoints) {
 277                                         // FIXME: consider BindingName as well
 278                                         ServiceEndpoint se = AddServiceEndpoint (
 279                                                 endpoint.Contract,
 280                                                 ConfigUtil.CreateBinding (endpoint.Binding, endpoint.BindingConfiguration),
 281                                                 endpoint.Address.ToString ());
 282                                 }
 283                                 // behaviors
 284                                 // TODO: use EvaluationContext of ServiceElement.
 285                                 ServiceBehaviorElement behavior = ConfigUtil.BehaviorsSection.ServiceBehaviors.Find (service.BehaviorConfiguration);
 286                                 if (behavior != null) {
 287                                         for (int i = 0; i < behavior.Count; i++) {
 288                                                 BehaviorExtensionElement bxel = behavior [i];
 289                                                 IServiceBehavior b = (IServiceBehavior) behavior [i].CreateBehavior ();
 290                                                 if (b != null)
 291                                                         Description.Behaviors.Add (b);
 292                                         }
 293                                 }
 294                         }
 295                         // TODO: consider commonBehaviors here
 296
 297                         // ensure ServiceAuthorizationBehavior
 298                         Authorization = Description.Behaviors.Find<ServiceAuthorizationBehavior> ();
 299                         if (Authorization == null) {
 300                                 Authorization = new ServiceAuthorizationBehavior ();
 301                                 Description.Behaviors.Add (Authorization);
 302                         }
 303
 304                         // ensure ServiceDebugBehavior
 305                         ServiceDebugBehavior debugBehavior = Description.Behaviors.Find<ServiceDebugBehavior> ();
 306                         if (debugBehavior == null) {
 307                                 debugBehavior = new ServiceDebugBehavior ();
 308                                 Description.Behaviors.Add (debugBehavior);
 309                         }
 310                 }
 311
 312                 private ServiceElement GetServiceElement() {
 313                         Type serviceType = Description.ServiceType;
 314                         if (serviceType == null)
 315                                 return null;
 316
 317                         return ConfigUtil.ServicesSection.Services [serviceType.FullName];
 318                 }
 319
 320                 internal ContractDescription GetContract (string name, string ns)
 321                 {
 322                         foreach (ContractDescription d in ImplementedContracts.Values)
 323                                 if (d.Name == name && d.Namespace == ns)
 324                                         return d;
 325                         return null;
 326                 }
 327
 328                 protected abstract ServiceDescription CreateDescription (
 329                         out IDictionary<string,ContractDescription> implementedContracts);
 330
 331                 protected void InitializeDescription (UriSchemeKeyedCollection baseAddresses)
 332                 {
 333                         this.base_addresses = baseAddresses;
 334                         IDictionary<string,ContractDescription> retContracts;
 335                         description = CreateDescription (out retContracts);
 336                         contracts = retContracts;
 337
 338                         ApplyConfiguration ();
 339                 }
 340
 341                 protected virtual void InitializeRuntime ()
 342                 {
 343                         //First validate the description, which should call all behaviors
 344                         //'Validate' method.
 345                         ValidateDescription ();
 346
 347                         //Build all ChannelDispatchers, one dispatcher per user configured EndPoint.
 348                         //We must keep thet ServiceEndpoints as a seperate collection, since the user
 349                         //can change the collection in the description during the behaviors events.
 350                         Dictionary<ServiceEndpoint, ChannelDispatcher> endPointToDispatcher = new Dictionary<ServiceEndpoint,ChannelDispatcher>();
 351                         ServiceEndpoint[] endPoints = new ServiceEndpoint[Description.Endpoints.Count];
 352                         Description.Endpoints.CopyTo (endPoints, 0);
 353                         foreach (ServiceEndpoint se in endPoints) {
 354                                 //Let all behaviors add their binding parameters
 355                                 BindingParameterCollection commonParams =
 356                                         new BindingParameterCollection ();
 357                                 AddBindingParameters (commonParams, se);
 358                                 ChannelDispatcher channel = BuildChannelDispatcher (se, commonParams);
 359                                 ChannelDispatchers.Add (channel);
 360                                 endPointToDispatcher[se] = channel;
 361                         }
 362
 363                         //After the ChannelDispatchers are created, and attached to the service host
 364                         //Apply dispatching behaviors.
 365                         foreach (IServiceBehavior b in Description.Behaviors)
 366                                 b.ApplyDispatchBehavior (Description, this);
 367
 368                         foreach(KeyValuePair<ServiceEndpoint, ChannelDispatcher> val in endPointToDispatcher)
 369                                 ApplyDispatchBehavior(val.Value, val.Key);
 370                 }
 371
 372                 private void ValidateDescription ()
 373                 {
 374                         foreach (IServiceBehavior b in Description.Behaviors)
 375                                 b.Validate (Description, this);
 376                         foreach (ServiceEndpoint endPoint in Description.Endpoints)
 377                                 endPoint.Validate ();
 378                 }
 379
 380                 private void ApplyDispatchBehavior (ChannelDispatcher dispatcher, ServiceEndpoint endPoint) {
 381                         foreach (IContractBehavior b in endPoint.Contract.Behaviors)
 382                                 b.ApplyDispatchBehavior (endPoint.Contract, endPoint, dispatcher.Endpoints[0].DispatchRuntime);
 383                         foreach (IEndpointBehavior b in endPoint.Behaviors)
 384                                 b.ApplyDispatchBehavior (endPoint, dispatcher.Endpoints [0]);
 385                         foreach (OperationDescription operation in endPoint.Contract.Operations) {
 386                                 foreach (IOperationBehavior b in operation.Behaviors)
 387                                         b.ApplyDispatchBehavior (operation, dispatcher.Endpoints [0].DispatchRuntime.Operations [operation.Name]);
 388                         }
 389
 390                 }
 391
 392                 internal ChannelDispatcher BuildChannelDispatcher (ServiceEndpoint se, BindingParameterCollection commonParams) {
 393
 394                         //User the binding parameters to build the channel listener and Dispatcher
 395                         IChannelListener lf = BuildListener (se, commonParams);
 396                         ChannelDispatcher cd = new ChannelDispatcher (
 397                                 lf, se.Binding.Name);
 398                         cd.MessageVersion = se.Binding.MessageVersion;
 399                         if (cd.MessageVersion == null)
 400                                 cd.MessageVersion = MessageVersion.Default;
 401
 402                         //Attach one EndpointDispacher to the ChannelDispatcher
 403                         EndpointDispatcher endpoint_dispatcher =
 404                                 new EndpointDispatcher (se.Address, se.Contract.Name, se.Contract.Namespace);
 405                         endpoint_dispatcher.DispatchRuntime.Type = Description.ServiceType;
 406                         endpoint_dispatcher.ContractFilter = GetContractFilter (se.Contract);
 407                         endpoint_dispatcher.ChannelDispatcher = cd;
 408                         cd.Endpoints.Add (endpoint_dispatcher);
 409
 410                         //Build the dispatch operations
 411                         DispatchRuntime db = endpoint_dispatcher.DispatchRuntime;
 412                         foreach (OperationDescription od in se.Contract.Operations)
 413                                 if (!db.Operations.Contains (od.Name))
 414                                         PopulateDispatchOperation (db, od);
 415
 416                         return cd;
 417                 }
 418
 419                 private MessageFilter GetContractFilter (ContractDescription contractDescription)
 420                 {
 421                         List<string> actions = new List<string> ();
 422                         foreach (OperationDescription od in contractDescription.Operations)
 423                                 foreach (MessageDescription md in od.Messages)
 424                                         if (md.Direction == MessageDirection.Input)
 425                                                 if (md.Action == "*")
 426                                                         return new MatchAllMessageFilter ();
 427                                                 else
 428                                                         actions.Add (md.Action);
 429
 430                         return new ActionMessageFilter (actions.ToArray ());
 431                 }
 432
 433                 private void AddBindingParameters (BindingParameterCollection commonParams, ServiceEndpoint endPoint) {
 434
 435                         commonParams.Add (ChannelProtectionRequirements.CreateFromContract (endPoint.Contract));
 436                         foreach (IServiceBehavior b in Description.Behaviors)
 437                                 b.AddBindingParameters (Description, this, Description.Endpoints, commonParams);
 438
 439                         foreach (IContractBehavior b in endPoint.Contract.Behaviors)
 440                                 b.AddBindingParameters (endPoint.Contract, endPoint, commonParams);
 441                         foreach (IEndpointBehavior b in endPoint.Behaviors)
 442                                 b.AddBindingParameters (endPoint, commonParams);
 443                         foreach (OperationDescription operation in endPoint.Contract.Operations) {
 444                                 foreach (IOperationBehavior b in operation.Behaviors)
 445                                         b.AddBindingParameters (operation, commonParams);
 446                         }
 447                 }
 448
 449                 void PopulateDispatchOperation (DispatchRuntime db, OperationDescription od) {
 450                         string reqA = null, resA = null;
 451                         foreach (MessageDescription m in od.Messages) {
 452                                 if (m.Direction == MessageDirection.Input)
 453                                         reqA = m.Action;
 454                                 else
 455                                         resA = m.Action;
 456                         }
 457                         DispatchOperation o =
 458                                 od.IsOneWay ?
 459                                 new DispatchOperation (db, od.Name, reqA) :
 460                                 new DispatchOperation (db, od.Name, reqA, resA);
 461                         bool has_void_reply = false;
 462                         foreach (MessageDescription md in od.Messages) {
 463                                 if (md.Direction == MessageDirection.Input &&
 464                                         md.Body.Parts.Count == 1 &&
 465                                         md.Body.Parts [0].Type == typeof (Message))
 466                                         o.DeserializeRequest = false;
 467                                 if (md.Direction == MessageDirection.Output &&
 468                                         md.Body.ReturnValue != null) {
 469                                         if (md.Body.ReturnValue.Type == typeof (Message))
 470                                                 o.SerializeReply = false;
 471                                         else if (md.Body.ReturnValue.Type == typeof (void))
 472                                                 has_void_reply = true;
 473                                 }
 474                         }
 475
 476                         // Setup Invoker
 477                         // FIXME: support async method
 478                         if (od.SyncMethod != null)
 479                                 o.Invoker = new SyncMethodInvoker (od.SyncMethod);
 480                         else
 481                                 o.Invoker = new AsyncMethodInvoker (od.BeginMethod, od.EndMethod);
 482
 483                         // Setup Formater
 484                         o.Formatter = BaseMessagesFormatter.Create (od);
 485
 486                         if (o.Action == "*" && o.ReplyAction == "*") {
 487                                 //Signature : Message  (Message)
 488                                 //          : void  (Message)
 489                                 //FIXME: void (IChannel)
 490                                 if (!o.DeserializeRequest && (!o.SerializeReply || has_void_reply))
 491                                         db.UnhandledDispatchOperation = o;
 492                         }
 493
 494                         db.Operations.Add (o);
 495                 }
 496
 497                 [MonoTODO]
 498                 protected void LoadConfigurationSection (ServiceElement element)
 499                 {
 500                         ServicesSection services = ConfigUtil.ServicesSection;
 501                 }
 502
 503                 void DoOpen (TimeSpan timeout)
 504                 {
 505                         foreach (var cd in ChannelDispatchers) {
 506                                 cd.Open (timeout);
 507                                 // This is likely hack.
 508                                 if (cd is ChannelDispatcher)
 509                                         ((ChannelDispatcher) cd).StartLoop ();
 510                         }
 511                 }
 512
 513                 IChannelListener BuildListener (ServiceEndpoint se,
 514                         BindingParameterCollection pl)
 515                 {
 516                         Binding b = se.Binding;
 517                         if (b.CanBuildChannelListener<IReplySessionChannel> (pl))
 518                                 return b.BuildChannelListener<IReplySessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 519                         if (b.CanBuildChannelListener<IReplyChannel> (pl))
 520                                 return b.BuildChannelListener<IReplyChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 521                         if (b.CanBuildChannelListener<IInputSessionChannel> (pl))
 522                                 return b.BuildChannelListener<IInputSessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 523                         if (b.CanBuildChannelListener<IInputChannel> (pl))
 524                                 return b.BuildChannelListener<IInputChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 525
 526                         if (b.CanBuildChannelListener<IDuplexChannel> (pl))
 527                                 return b.BuildChannelListener<IDuplexChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 528                         if (b.CanBuildChannelListener<IDuplexSessionChannel> (pl))
 529                                 return b.BuildChannelListener<IDuplexSessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 530                         throw new InvalidOperationException ("None of the listener channel types is supported");
 531                 }
 532
 533                 [MonoTODO]
 534                 protected override sealed void OnAbort ()
 535                 {
 536                 }
 537
 538                 Action<TimeSpan> close_delegate;
 539                 Action<TimeSpan> open_delegate;
 540
 541                 protected override sealed IAsyncResult OnBeginClose (
 542                         TimeSpan timeout, AsyncCallback callback, object state)
 543                 {
 544                         if (close_delegate != null)
 545                                 close_delegate = new Action<TimeSpan> (OnClose);
 546                         return close_delegate.BeginInvoke (timeout, callback, state);
 547                 }
 548
 549                 protected override sealed IAsyncResult OnBeginOpen (
 550                         TimeSpan timeout, AsyncCallback callback, object state)
 551                 {
 552                         if (open_delegate == null)
 553                                 open_delegate = new Action<TimeSpan> (OnOpen);
 554                         return open_delegate.BeginInvoke (timeout, callback, state);
 555                 }
 556
 557                 protected override void OnClose (TimeSpan timeout)
 558                 {
 559                         DateTime start = DateTime.Now;
 560                         ReleasePerformanceCounters ();
 561                         List<ChannelDispatcherBase> l = new List<ChannelDispatcherBase> (ChannelDispatchers);
 562                         foreach (ChannelDispatcherBase e in l) {
 563                                 try {
 564                                         TimeSpan ts = timeout - (DateTime.Now - start);
 565                                         if (ts < TimeSpan.Zero)
 566                                                 e.Abort ();
 567                                         else
 568                                                 e.Close (ts);
 569                                 } catch (Exception ex) {
 570                                         Console.WriteLine ("ServiceHostBase failed to close the channel dispatcher:");
 571                                         Console.WriteLine (ex);
 572                                 }
 573                         }
 574                 }
 575
 576                 protected override sealed void OnOpen (TimeSpan timeout)
 577                 {
 578                         InitializeRuntime ();
 579                         DoOpen (timeout);
 580                 }
 581
 582                 protected override void OnEndClose (IAsyncResult result)
 583                 {
 584                         if (close_delegate == null)
 585                                 throw new InvalidOperationException ("Async close operation has not started");
 586                         close_delegate.EndInvoke (result);
 587                 }
 588
 589                 protected override sealed void OnEndOpen (IAsyncResult result)
 590                 {
 591                         if (open_delegate == null)
 592                                 throw new InvalidOperationException ("Aync open operation has not started");
 593                         open_delegate.EndInvoke (result);
 594                 }
 595
 596                 protected override void OnOpened ()
 597                 {
 598                 }
 599
 600                 [MonoTODO]
 601                 protected void ReleasePerformanceCounters ()
 602                 {
 603                 }
 604
 605                 void IDisposable.Dispose ()
 606                 {
 607                         Close ();
 608                 }
 609
 610                 class SyncMethodInvoker : IOperationInvoker
 611                 {
 612                         readonly MethodInfo _methodInfo;
 613                         public SyncMethodInvoker (MethodInfo methodInfo) {
 614                                 _methodInfo = methodInfo;
 615                         }
 616
 617                         #region IOperationInvoker Members
 618
 619                         public bool IsSynchronous {
 620                                 get { return true; }
 621                         }
 622
 623                         public object [] AllocateParameters () {
 624                                 return new object [_methodInfo.GetParameters ().Length];
 625                         }
 626
 627                         public object Invoke (object instance, object [] parameters)
 628             {
 629                                 return _methodInfo.Invoke (instance, parameters);
 630                         }
 631
 632                         public IAsyncResult InvokeBegin (object instance, object [] inputs, AsyncCallback callback, object state) {
 633                                 throw new NotSupportedException ();
 634                         }
 635
 636                         public object InvokeEnd (object instance, out object [] outputs, IAsyncResult result) {
 637                                 throw new NotSupportedException ();
 638                         }
 639
 640                         #endregion
 641                 }
 642
 643                 class AsyncMethodInvoker : IOperationInvoker
 644                 {
 645                         readonly MethodInfo _beginMethodInfo, _endMethodInfo;
 646                         public AsyncMethodInvoker (MethodInfo beginMethodInfo, MethodInfo endMethodInfo) {
 647                                 _beginMethodInfo = beginMethodInfo;
 648                                 _endMethodInfo = endMethodInfo;
 649                         }
 650
 651                         #region IOperationInvoker Members
 652
 653                         public bool IsSynchronous {
 654                                 get { return false; }
 655                         }
 656
 657                         public object [] AllocateParameters () {
 658                                 return new object [_beginMethodInfo.GetParameters ().Length - 2 + _endMethodInfo.GetParameters().Length-1];
 659                         }
 660
 661                         public object Invoke (object instance, object [] parameters) {
 662                                 throw new NotImplementedException ("Can't invoke async method synchronously");
 663                                 //BUGBUG: need to differentiate between input and output parameters.
 664                                 IAsyncResult asyncResult = InvokeBegin(instance, parameters, delegate(IAsyncResult ignore) { }, null);
 665                                 asyncResult.AsyncWaitHandle.WaitOne();
 666                                 return InvokeEnd(instance, out parameters, asyncResult);
 667                         }
 668
 669                         public IAsyncResult InvokeBegin (object instance, object [] inputs, AsyncCallback callback, object state) {
 670                                 if (inputs.Length + 2 != _beginMethodInfo.GetParameters ().Length)
 671                                         throw new ArgumentException ("Wrong number of input parameters");
 672                                 object [] fullargs = new object [_beginMethodInfo.GetParameters ().Length];
 673                                 Array.Copy (inputs, fullargs, inputs.Length);
 674                                 fullargs [inputs.Length] = callback;
 675                                 fullargs [inputs.Length + 1] = state;
 676                                 return (IAsyncResult) _beginMethodInfo.Invoke (instance, fullargs);
 677                         }
 678
 679                         public object InvokeEnd (object instance, out object [] outputs, IAsyncResult asyncResult) {
 680                                 outputs = new object [_endMethodInfo.GetParameters ().Length - 1];
 681                                 object [] fullargs = new object [_endMethodInfo.GetParameters ().Length];
 682                                 fullargs [outputs.Length] = asyncResult;
 683                                 object result = _endMethodInfo.Invoke (instance, fullargs);
 684                                 Array.Copy (fullargs, outputs, outputs.Length);
 685                                 return result;
 686                         }
 687
 688                         #endregion
 689                 }
 690         }
 691 }