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                 [MonoTODO]
  87                 public ChannelDispatcherCollection ChannelDispatchers {
  88                         get { return channel_dispatchers; }
  89                 }
  90
  91                 public ServiceAuthorizationBehavior Authorization {
  92                         get;
  93                         private set;
  94                 }
  95
  96                 [MonoTODO]
  97                 public ServiceCredentials Credentials {
  98                         get { return credentials; }
  99                 }
 100
 101                 public ServiceDescription Description {
 102                         get { return description; }
 103                 }
 104
 105                 protected IDictionary<string,ContractDescription> ImplementedContracts {
 106                         get { return contracts; }
 107                 }
 108
 109                 [MonoTODO]
 110                 public IExtensionCollection<ServiceHostBase> Extensions {
 111                         get {
 112                                 if (extensions == null)
 113                                         extensions = new ExtensionCollection<ServiceHostBase> (this);
 114                                 return extensions;
 115                         }
 116                 }
 117
 118                 protected internal override TimeSpan DefaultCloseTimeout {
 119                         get { return DefaultCommunicationTimeouts.Instance.CloseTimeout; }
 120                 }
 121
 122                 protected internal override TimeSpan DefaultOpenTimeout {
 123                         get { return DefaultCommunicationTimeouts.Instance.OpenTimeout; }
 124                 }
 125
 126                 public TimeSpan CloseTimeout {
 127                         get { return close_timeout; }
 128                         set { close_timeout = value; }
 129                 }
 130
 131                 public TimeSpan OpenTimeout {
 132                         get { return open_timeout; }
 133                         set { open_timeout = value; }
 134                 }
 135
 136                 public int ManualFlowControlLimit {
 137                         get { return flow_limit; }
 138                         set { flow_limit = value; }
 139                 }
 140
 141                 public ServiceEndpoint AddServiceEndpoint (
 142                         string implementedContract, Binding binding, string address)
 143                 {
 144                         return AddServiceEndpoint (implementedContract,
 145                                 binding,
 146                                 new Uri (address, UriKind.RelativeOrAbsolute));
 147                 }
 148
 149                 public ServiceEndpoint AddServiceEndpoint (
 150                         string implementedContract, Binding binding,
 151                         string address, Uri listenUri)
 152                 {
 153                         Uri uri = new Uri (address, UriKind.RelativeOrAbsolute);
 154                         return AddServiceEndpoint (
 155                                 implementedContract, binding, uri, uri);
 156                 }
 157
 158                 public ServiceEndpoint AddServiceEndpoint (
 159                         string implementedContract, Binding binding,
 160                         Uri address)
 161                 {
 162                         return AddServiceEndpoint (implementedContract, binding, address, address);
 163                 }
 164
 165                 public ServiceEndpoint AddServiceEndpoint (
 166                         string implementedContract, Binding binding,
 167                         Uri address, Uri listenUri)
 168                 {
 169                         EndpointAddress ea = BuildEndpointAddress (address, binding);
 170                         ContractDescription cd = GetContract (implementedContract);
 171                         if (cd == null)
 172                                 throw new InvalidOperationException (String.Format ("Contract '{0}' was not found in the implemented contracts in this service host.", implementedContract));
 173                         return AddServiceEndpointCore (cd, binding, ea, listenUri);
 174                 }
 175
 176                 Type PopulateType (string typeName)
 177                 {
 178                         Type type = Type.GetType (typeName);
 179                         if (type != null)
 180                                 return type;
 181                         foreach (ContractDescription cd in ImplementedContracts.Values) {
 182                                 type = cd.ContractType.Assembly.GetType (typeName);
 183                                 if (type != null)
 184                                         return type;
 185                         }
 186                         return null;
 187                 }
 188
 189                 ContractDescription GetContract (string typeName)
 190                 {
 191                         //FIXME: hack hack hack
 192                         ImplementedContracts ["IHttpGetHelpPageAndMetadataContract"] =
 193                                 ContractDescription.GetContract (typeof (IHttpGetHelpPageAndMetadataContract));
 194
 195                         // FIXME: As long as I tried, *only* IMetadataExchange
 196                         // is the exception case that does not require full
 197                         // type name. Hence I treat it as a special case.
 198                         if (typeName == ServiceMetadataBehavior.MexContractName) {
 199                                 if (!Description.Behaviors.Contains (typeof (ServiceMetadataBehavior)) && Array.IndexOf (Description.ServiceType.GetInterfaces (), typeof (IMetadataExchange)) < 0)
 200                                         throw new InvalidOperationException (
 201                                                 "Add ServiceMetadataBehavior to the ServiceHost to add a endpoint for IMetadataExchange contract.");
 202
 203                                 ImplementedContracts [ServiceMetadataBehavior.MexContractName] =
 204                                         ContractDescription.GetContract (typeof (IMetadataExchange));
 205
 206                                 foreach (ContractDescription cd in ImplementedContracts.Values)
 207                                         if (cd.ContractType == typeof (IMetadataExchange))
 208                                                 return cd;
 209                                 return null;
 210                         }
 211
 212                         Type type = PopulateType (typeName);
 213                         if (type == null)
 214                                 return null;
 215
 216                         foreach (ContractDescription cd in ImplementedContracts.Values) {
 217                                 // FIXME: This check is a negative side effect
 218                                 // of the above hack.
 219                                 if (cd.ContractType == typeof (IMetadataExchange))
 220                                         continue;
 221
 222                                 if (cd.ContractType == type ||
 223                                     cd.ContractType.IsSubclassOf (type) ||
 224                                     type.IsInterface && cd.ContractType.GetInterface (type.FullName) == type)
 225                                         return cd;
 226                         }
 227                         return null;
 228                 }
 229
 230                 internal EndpointAddress BuildEndpointAddress (Uri address, Binding binding)
 231                 {
 232                         if (!address.IsAbsoluteUri) {
 233                                 // Find a Base address with matching scheme,
 234                                 // and build new absolute address
 235                                 if (!base_addresses.Contains (binding.Scheme))
 236                                         throw new InvalidOperationException (String.Format ("Could not find base address that matches Scheme {0} for endpoint {1}", binding.Scheme, binding.Name));
 237
 238                                 Uri baseaddr = base_addresses [binding.Scheme];
 239
 240                                 if (!baseaddr.AbsoluteUri.EndsWith ("/"))
 241                                         baseaddr = new Uri (baseaddr.AbsoluteUri + "/");
 242                                 address = new Uri (baseaddr, address);
 243                         }
 244                         return new EndpointAddress (address);
 245                 }
 246
 247                 internal ServiceEndpoint AddServiceEndpointCore (
 248                         ContractDescription cd, Binding binding, EndpointAddress address, Uri listenUri)
 249                 {
 250                         foreach (ServiceEndpoint e in Description.Endpoints)
 251                                 if (e.Contract == cd)
 252                                         return e;
 253                         ServiceEndpoint se = new ServiceEndpoint (cd, binding, address);
 254                         se.ListenUri = listenUri.IsAbsoluteUri ? listenUri : new Uri (address.Uri, listenUri);
 255                         Description.Endpoints.Add (se);
 256                         return se;
 257                 }
 258
 259                 [MonoTODO]
 260                 protected virtual void ApplyConfiguration ()
 261                 {
 262                         if (Description == null)
 263                                 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");
 264
 265                         ServiceElement service = GetServiceElement ();
 266
 267                         //TODO: Should we call here LoadServiceElement ?
 268                         if (service != null) {
 269
 270                                 //base addresses
 271                                 HostElement host = service.Host;
 272                                 foreach (BaseAddressElement baseAddress in host.BaseAddresses) {
 273                                         this.base_addresses.Add (new Uri (baseAddress.BaseAddress));
 274                                 }
 275
 276                                 // services
 277                                 foreach (ServiceEndpointElement endpoint in service.Endpoints) {
 278                                         // FIXME: consider BindingName as well
 279                                         ServiceEndpoint se = AddServiceEndpoint (
 280                                                 endpoint.Contract,
 281                                                 ConfigUtil.CreateBinding (endpoint.Binding, endpoint.BindingConfiguration),
 282                                                 endpoint.Address.ToString ());
 283                                 }
 284                                 // behaviors
 285                                 // TODO: use EvaluationContext of ServiceElement.
 286                                 ServiceBehaviorElement behavior = ConfigUtil.BehaviorsSection.ServiceBehaviors.Find (service.BehaviorConfiguration);
 287                                 if (behavior != null) {
 288                                         for (int i = 0; i < behavior.Count; i++) {
 289                                                 BehaviorExtensionElement bxel = behavior [i];
 290                                                 IServiceBehavior b = (IServiceBehavior) behavior [i].CreateBehavior ();
 291                                                 if (b != null)
 292                                                         Description.Behaviors.Add (b);
 293                                         }
 294                                 }
 295                         }
 296                         // TODO: consider commonBehaviors here
 297
 298                         // ensure ServiceAuthorizationBehavior
 299                         Authorization = Description.Behaviors.Find<ServiceAuthorizationBehavior> ();
 300                         if (Authorization == null) {
 301                                 Authorization = new ServiceAuthorizationBehavior ();
 302                                 Description.Behaviors.Add (Authorization);
 303                         }
 304
 305                         // ensure ServiceDebugBehavior
 306                         ServiceDebugBehavior debugBehavior = Description.Behaviors.Find<ServiceDebugBehavior> ();
 307                         if (debugBehavior == null) {
 308                                 debugBehavior = new ServiceDebugBehavior ();
 309                                 Description.Behaviors.Add (debugBehavior);
 310                         }
 311                 }
 312
 313                 private ServiceElement GetServiceElement() {
 314                         Type serviceType = Description.ServiceType;
 315                         if (serviceType == null)
 316                                 return null;
 317
 318                         return ConfigUtil.ServicesSection.Services [serviceType.FullName];
 319                 }
 320
 321                 internal ContractDescription GetContract (string name, string ns)
 322                 {
 323                         foreach (ContractDescription d in ImplementedContracts.Values)
 324                                 if (d.Name == name && d.Namespace == ns)
 325                                         return d;
 326                         return null;
 327                 }
 328
 329                 protected abstract ServiceDescription CreateDescription (
 330                         out IDictionary<string,ContractDescription> implementedContracts);
 331
 332                 protected void InitializeDescription (UriSchemeKeyedCollection baseAddresses)
 333                 {
 334                         this.base_addresses = baseAddresses;
 335                         IDictionary<string,ContractDescription> retContracts;
 336                         description = CreateDescription (out retContracts);
 337                         contracts = retContracts;
 338
 339                         ApplyConfiguration ();
 340                 }
 341
 342                 protected virtual void InitializeRuntime ()
 343                 {
 344                         //First validate the description, which should call all behaviors
 345                         //'Validate' method.
 346                         ValidateDescription ();
 347
 348                         //Build all ChannelDispatchers, one dispatcher per user configured EndPoint.
 349                         //We must keep thet ServiceEndpoints as a seperate collection, since the user
 350                         //can change the collection in the description during the behaviors events.
 351                         Dictionary<ServiceEndpoint, ChannelDispatcher> endPointToDispatcher = new Dictionary<ServiceEndpoint,ChannelDispatcher>();
 352                         ServiceEndpoint[] endPoints = new ServiceEndpoint[Description.Endpoints.Count];
 353                         Description.Endpoints.CopyTo (endPoints, 0);
 354                         foreach (ServiceEndpoint se in endPoints) {
 355                                 //Let all behaviors add their binding parameters
 356                                 BindingParameterCollection commonParams =
 357                                         new BindingParameterCollection ();
 358                                 AddBindingParameters (commonParams, se);
 359                                 ChannelDispatcher channel = BuildChannelDispatcher (se, commonParams);
 360                                 ChannelDispatchers.Add (channel);
 361                                 endPointToDispatcher[se] = channel;
 362                         }
 363
 364                         //After the ChannelDispatchers are created, and attached to the service host
 365                         //Apply dispatching behaviors.
 366                         foreach (IServiceBehavior b in Description.Behaviors)
 367                                 b.ApplyDispatchBehavior (Description, this);
 368
 369                         foreach(KeyValuePair<ServiceEndpoint, ChannelDispatcher> val in endPointToDispatcher)
 370                                 ApplyDispatchBehavior(val.Value, val.Key);
 371                 }
 372
 373                 private void ValidateDescription ()
 374                 {
 375                         foreach (IServiceBehavior b in Description.Behaviors)
 376                                 b.Validate (Description, this);
 377                         foreach (ServiceEndpoint endPoint in Description.Endpoints)
 378                                 endPoint.Validate ();
 379                 }
 380
 381                 private void ApplyDispatchBehavior (ChannelDispatcher dispatcher, ServiceEndpoint endPoint) {
 382                         foreach (IContractBehavior b in endPoint.Contract.Behaviors)
 383                                 b.ApplyDispatchBehavior (endPoint.Contract, endPoint, dispatcher.Endpoints[0].DispatchRuntime);
 384                         foreach (IEndpointBehavior b in endPoint.Behaviors)
 385                                 b.ApplyDispatchBehavior (endPoint, dispatcher.Endpoints [0]);
 386                         foreach (OperationDescription operation in endPoint.Contract.Operations) {
 387                                 foreach (IOperationBehavior b in operation.Behaviors)
 388                                         b.ApplyDispatchBehavior (operation, dispatcher.Endpoints [0].DispatchRuntime.Operations [operation.Name]);
 389                         }
 390
 391                 }
 392
 393                 internal ChannelDispatcher BuildChannelDispatcher (ServiceEndpoint se, BindingParameterCollection commonParams) {
 394
 395                         //User the binding parameters to build the channel listener and Dispatcher
 396                         IChannelListener lf = BuildListener (se, commonParams);
 397                         ChannelDispatcher cd = new ChannelDispatcher (
 398                                 lf, se.Binding.Name);
 399                         cd.MessageVersion = se.Binding.MessageVersion;
 400                         if (cd.MessageVersion == null)
 401                                 cd.MessageVersion = MessageVersion.Default;
 402
 403                         //Attach one EndpointDispacher to the ChannelDispatcher
 404                         EndpointDispatcher endpoint_dispatcher =
 405                                 new EndpointDispatcher (se.Address, se.Contract.Name, se.Contract.Namespace);
 406                         endpoint_dispatcher.DispatchRuntime.Type = Description.ServiceType;
 407                         endpoint_dispatcher.ContractFilter = GetContractFilter (se.Contract);
 408                         endpoint_dispatcher.ChannelDispatcher = cd;
 409                         cd.Endpoints.Add (endpoint_dispatcher);
 410
 411                         //Build the dispatch operations
 412                         DispatchRuntime db = endpoint_dispatcher.DispatchRuntime;
 413                         foreach (OperationDescription od in se.Contract.Operations)
 414                                 if (!db.Operations.Contains (od.Name))
 415                                         PopulateDispatchOperation (db, od);
 416
 417                         return cd;
 418                 }
 419
 420                 private MessageFilter GetContractFilter (ContractDescription contractDescription)
 421                 {
 422                         List<string> actions = new List<string> ();
 423                         foreach (OperationDescription od in contractDescription.Operations)
 424                                 foreach (MessageDescription md in od.Messages)
 425                                         if (md.Direction == MessageDirection.Input)
 426                                                 if (md.Action == "*")
 427                                                         return new MatchAllMessageFilter ();
 428                                                 else
 429                                                         actions.Add (md.Action);
 430
 431                         return new ActionMessageFilter (actions.ToArray ());
 432                 }
 433
 434                 private void AddBindingParameters (BindingParameterCollection commonParams, ServiceEndpoint endPoint) {
 435
 436                         commonParams.Add (ChannelProtectionRequirements.CreateFromContract (endPoint.Contract));
 437                         foreach (IServiceBehavior b in Description.Behaviors)
 438                                 b.AddBindingParameters (Description, this, Description.Endpoints, commonParams);
 439
 440                         foreach (IContractBehavior b in endPoint.Contract.Behaviors)
 441                                 b.AddBindingParameters (endPoint.Contract, endPoint, commonParams);
 442                         foreach (IEndpointBehavior b in endPoint.Behaviors)
 443                                 b.AddBindingParameters (endPoint, commonParams);
 444                         foreach (OperationDescription operation in endPoint.Contract.Operations) {
 445                                 foreach (IOperationBehavior b in operation.Behaviors)
 446                                         b.AddBindingParameters (operation, commonParams);
 447                         }
 448                 }
 449
 450                 void PopulateDispatchOperation (DispatchRuntime db, OperationDescription od) {
 451                         string reqA = null, resA = null;
 452                         foreach (MessageDescription m in od.Messages) {
 453                                 if (m.Direction == MessageDirection.Input)
 454                                         reqA = m.Action;
 455                                 else
 456                                         resA = m.Action;
 457                         }
 458                         DispatchOperation o =
 459                                 od.IsOneWay ?
 460                                 new DispatchOperation (db, od.Name, reqA) :
 461                                 new DispatchOperation (db, od.Name, reqA, resA);
 462                         bool has_void_reply = false;
 463                         foreach (MessageDescription md in od.Messages) {
 464                                 if (md.Direction == MessageDirection.Input &&
 465                                         md.Body.Parts.Count == 1 &&
 466                                         md.Body.Parts [0].Type == typeof (Message))
 467                                         o.DeserializeRequest = false;
 468                                 if (md.Direction == MessageDirection.Output &&
 469                                         md.Body.ReturnValue != null) {
 470                                         if (md.Body.ReturnValue.Type == typeof (Message))
 471                                                 o.SerializeReply = false;
 472                                         else if (md.Body.ReturnValue.Type == typeof (void))
 473                                                 has_void_reply = true;
 474                                 }
 475                         }
 476
 477                         // Setup Invoker
 478                         // FIXME: support async method
 479                         if (od.SyncMethod != null)
 480                                 o.Invoker = new SyncMethodInvoker (od.SyncMethod);
 481                         else
 482                                 o.Invoker = new AsyncMethodInvoker (od.BeginMethod, od.EndMethod);
 483
 484                         // Setup Formater
 485                         o.Formatter = BaseMessagesFormatter.Create (od);
 486
 487                         if (o.Action == "*" && o.ReplyAction == "*") {
 488                                 //Signature : Message  (Message)
 489                                 //          : void  (Message)
 490                                 //FIXME: void (IChannel)
 491                                 if (!o.DeserializeRequest && (!o.SerializeReply || has_void_reply))
 492                                         db.UnhandledDispatchOperation = o;
 493                         }
 494
 495                         db.Operations.Add (o);
 496                 }
 497
 498                 [MonoTODO]
 499                 protected void LoadConfigurationSection (ServiceElement element)
 500                 {
 501                         ServicesSection services = ConfigUtil.ServicesSection;
 502                 }
 503
 504                 void DoOpen (TimeSpan timeout)
 505                 {
 506                         foreach (var cd in ChannelDispatchers) {
 507                                 cd.Open (timeout);
 508                                 // This is likely hack.
 509                                 if (cd is ChannelDispatcher)
 510                                         ((ChannelDispatcher) cd).StartLoop ();
 511                         }
 512                 }
 513
 514                 IChannelListener BuildListener (ServiceEndpoint se,
 515                         BindingParameterCollection pl)
 516                 {
 517                         Binding b = se.Binding;
 518                         if (b.CanBuildChannelListener<IReplySessionChannel> (pl))
 519                                 return b.BuildChannelListener<IReplySessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 520                         if (b.CanBuildChannelListener<IReplyChannel> (pl))
 521                                 return b.BuildChannelListener<IReplyChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 522                         if (b.CanBuildChannelListener<IInputSessionChannel> (pl))
 523                                 return b.BuildChannelListener<IInputSessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 524                         if (b.CanBuildChannelListener<IInputChannel> (pl))
 525                                 return b.BuildChannelListener<IInputChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 526
 527                         if (b.CanBuildChannelListener<IDuplexChannel> (pl))
 528                                 return b.BuildChannelListener<IDuplexChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 529                         if (b.CanBuildChannelListener<IDuplexSessionChannel> (pl))
 530                                 return b.BuildChannelListener<IDuplexSessionChannel> (se.ListenUri, "", se.ListenUriMode, pl);
 531                         throw new InvalidOperationException ("None of the listener channel types is supported");
 532                 }
 533
 534                 [MonoTODO]
 535                 protected override sealed void OnAbort ()
 536                 {
 537                 }
 538
 539                 Action<TimeSpan> close_delegate;
 540                 Action<TimeSpan> open_delegate;
 541
 542                 protected override sealed IAsyncResult OnBeginClose (
 543                         TimeSpan timeout, AsyncCallback callback, object state)
 544                 {
 545                         if (close_delegate != null)
 546                                 close_delegate = new Action<TimeSpan> (OnClose);
 547                         return close_delegate.BeginInvoke (timeout, callback, state);
 548                 }
 549
 550                 protected override sealed IAsyncResult OnBeginOpen (
 551                         TimeSpan timeout, AsyncCallback callback, object state)
 552                 {
 553                         if (open_delegate == null)
 554                                 open_delegate = new Action<TimeSpan> (OnOpen);
 555                         return open_delegate.BeginInvoke (timeout, callback, state);
 556                 }
 557
 558                 protected override void OnClose (TimeSpan timeout)
 559                 {
 560                         DateTime start = DateTime.Now;
 561                         ReleasePerformanceCounters ();
 562                         List<ChannelDispatcherBase> l = new List<ChannelDispatcherBase> (ChannelDispatchers);
 563                         foreach (ChannelDispatcherBase e in l) {
 564                                 try {
 565                                         TimeSpan ts = timeout - (DateTime.Now - start);
 566                                         if (ts < TimeSpan.Zero)
 567                                                 e.Abort ();
 568                                         else
 569                                                 e.Close (ts);
 570                                 } catch (Exception ex) {
 571                                         Console.WriteLine ("ServiceHostBase failed to close the channel dispatcher:");
 572                                         Console.WriteLine (ex);
 573                                 }
 574                         }
 575                 }
 576
 577                 protected override sealed void OnOpen (TimeSpan timeout)
 578                 {
 579                         InitializeRuntime ();
 580                         DoOpen (timeout);
 581                 }
 582
 583                 protected override void OnEndClose (IAsyncResult result)
 584                 {
 585                         if (close_delegate == null)
 586                                 throw new InvalidOperationException ("Async close operation has not started");
 587                         close_delegate.EndInvoke (result);
 588                 }
 589
 590                 protected override sealed void OnEndOpen (IAsyncResult result)
 591                 {
 592                         if (open_delegate == null)
 593                                 throw new InvalidOperationException ("Aync open operation has not started");
 594                         open_delegate.EndInvoke (result);
 595                 }
 596
 597                 protected override void OnOpened ()
 598                 {
 599                 }
 600
 601                 [MonoTODO]
 602                 protected void ReleasePerformanceCounters ()
 603                 {
 604                 }
 605
 606                 void IDisposable.Dispose ()
 607                 {
 608                         Close ();
 609                 }
 610
 611                 class SyncMethodInvoker : IOperationInvoker
 612                 {
 613                         readonly MethodInfo _methodInfo;
 614                         public SyncMethodInvoker (MethodInfo methodInfo) {
 615                                 _methodInfo = methodInfo;
 616                         }
 617
 618                         #region IOperationInvoker Members
 619
 620                         public bool IsSynchronous {
 621                                 get { return true; }
 622                         }
 623
 624                         public object [] AllocateParameters () {
 625                                 return new object [_methodInfo.GetParameters ().Length];
 626                         }
 627
 628                         public object Invoke (object instance, object [] parameters)
 629             {
 630                                 return _methodInfo.Invoke (instance, parameters);
 631                         }
 632
 633                         public IAsyncResult InvokeBegin (object instance, object [] inputs, AsyncCallback callback, object state) {
 634                                 throw new NotSupportedException ();
 635                         }
 636
 637                         public object InvokeEnd (object instance, out object [] outputs, IAsyncResult result) {
 638                                 throw new NotSupportedException ();
 639                         }
 640
 641                         #endregion
 642                 }
 643
 644                 class AsyncMethodInvoker : IOperationInvoker
 645                 {
 646                         readonly MethodInfo _beginMethodInfo, _endMethodInfo;
 647                         public AsyncMethodInvoker (MethodInfo beginMethodInfo, MethodInfo endMethodInfo) {
 648                                 _beginMethodInfo = beginMethodInfo;
 649                                 _endMethodInfo = endMethodInfo;
 650                         }
 651
 652                         #region IOperationInvoker Members
 653
 654                         public bool IsSynchronous {
 655                                 get { return false; }
 656                         }
 657
 658                         public object [] AllocateParameters () {
 659                                 return new object [_beginMethodInfo.GetParameters ().Length - 2 + _endMethodInfo.GetParameters().Length-1];
 660                         }
 661
 662                         public object Invoke (object instance, object [] parameters) {
 663                                 throw new NotImplementedException ("Can't invoke async method synchronously");
 664                                 //BUGBUG: need to differentiate between input and output parameters.
 665                                 IAsyncResult asyncResult = InvokeBegin(instance, parameters, delegate(IAsyncResult ignore) { }, null);
 666                                 asyncResult.AsyncWaitHandle.WaitOne();
 667                                 return InvokeEnd(instance, out parameters, asyncResult);
 668                         }
 669
 670                         public IAsyncResult InvokeBegin (object instance, object [] inputs, AsyncCallback callback, object state) {
 671                                 if (inputs.Length + 2 != _beginMethodInfo.GetParameters ().Length)
 672                                         throw new ArgumentException ("Wrong number of input parameters");
 673                                 object [] fullargs = new object [_beginMethodInfo.GetParameters ().Length];
 674                                 Array.Copy (inputs, fullargs, inputs.Length);
 675                                 fullargs [inputs.Length] = callback;
 676                                 fullargs [inputs.Length + 1] = state;
 677                                 return (IAsyncResult) _beginMethodInfo.Invoke (instance, fullargs);
 678                         }
 679
 680                         public object InvokeEnd (object instance, out object [] outputs, IAsyncResult asyncResult) {
 681                                 outputs = new object [_endMethodInfo.GetParameters ().Length - 1];
 682                                 object [] fullargs = new object [_endMethodInfo.GetParameters ().Length];
 683                                 fullargs [outputs.Length] = asyncResult;
 684                                 object result = _endMethodInfo.Invoke (instance, fullargs);
 685                                 Array.Copy (fullargs, outputs, outputs.Length);
 686                                 return result;
 687                         }
 688
 689                         #endregion
 690                 }
 691         }
 692 }