mcs/class/corlib/System.Runtime.Remoting.Proxies/RemotingProxy.cs

   1 //
   2 // System.Runtime.Remoting.Proxies.RemotingProxy.cs
   3 //
   4 // Authors:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //   Lluis Sanchez Gual (lsg@ctv.es)
   7 //
   8 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Reflection;
  36 using System.Runtime.Remoting.Messaging;
  37 using System.Runtime.Remoting.Activation;
  38 using System.Runtime.Remoting.Channels;
  39 using System.Runtime.Remoting.Contexts;
  40 using System.Runtime.CompilerServices;
  41 using System.Threading;
  42
  43
  44 namespace System.Runtime.Remoting.Proxies
  45 {
  46
  47         internal class RemotingProxy : RealProxy, IRemotingTypeInfo
  48         {
  49                 static MethodInfo _cache_GetTypeMethod = typeof(System.Object).GetMethod("GetType");
  50                 static MethodInfo _cache_GetHashCodeMethod = typeof(System.Object).GetMethod("GetHashCode");
  51
  52                 IMessageSink _sink;
  53                 bool _hasEnvoySink;
  54                 ConstructionCall _ctorCall;
  55                 string _targetUri;
  56
  57                 internal RemotingProxy (Type type, ClientIdentity identity) : base (type, identity)
  58                 {
  59                         _sink = identity.ChannelSink;
  60                         _hasEnvoySink = false;
  61                         _targetUri = identity.TargetUri;
  62                 }
  63
  64                 internal RemotingProxy (Type type, string activationUrl, object[] activationAttributes) : base (type)
  65                 {
  66                         _hasEnvoySink = false;
  67                         _ctorCall = ActivationServices.CreateConstructionCall (type, activationUrl, activationAttributes);
  68                 }
  69
  70                 public override IMessage Invoke (IMessage request)
  71                 {
  72                         MonoMethodMessage mMsg = (MonoMethodMessage) request;
  73
  74                         if (mMsg.MethodBase == _cache_GetHashCodeMethod)
  75                                 return new MethodResponse(ObjectIdentity.GetHashCode(), null, null, request as IMethodCallMessage);
  76
  77                         if (mMsg.MethodBase == _cache_GetTypeMethod)
  78                                 return new MethodResponse(GetProxiedType(), null, null, request as IMethodCallMessage);
  79
  80                         mMsg.Uri = _targetUri;
  81                         ((IInternalMessage)mMsg).TargetIdentity = _objectIdentity;
  82
  83                         _objectIdentity.NotifyClientDynamicSinks (true, request, true, false);
  84
  85                         IMessage response;
  86                         IMessageSink sink;
  87
  88                         // Needs to go through the client context sink?
  89                         if (Thread.CurrentContext.HasExitSinks && !_hasEnvoySink)
  90                                 sink = Thread.CurrentContext.GetClientContextSinkChain ();
  91                         else
  92                                 sink = _sink;
  93
  94                         if (mMsg.CallType == CallType.Sync)
  95                                 response = sink.SyncProcessMessage (request);
  96                         else
  97                         {
  98                                 AsyncResult ares = mMsg.AsyncResult;
  99                                 IMessageCtrl mctrl = sink.AsyncProcessMessage (request, ares);
 100                                 if (ares != null) ares.SetMessageCtrl (mctrl);
 101                                 response = new ReturnMessage (null, new object[0], 0, null, mMsg);
 102                         }
 103
 104                         _objectIdentity.NotifyClientDynamicSinks (false, request, true, false);
 105
 106                         return response;
 107                 }
 108
 109                 internal void AttachIdentity (Identity identity)
 110                 {
 111                         _objectIdentity = identity;
 112
 113                         if (identity is ClientActivatedIdentity)        // It is a CBO
 114                         {
 115                                 ClientActivatedIdentity cai = (ClientActivatedIdentity)identity;
 116                                 _targetContext = cai.Context;
 117                                 AttachServer (cai.GetServerObject ());
 118                         }
 119
 120                         if (identity is ClientIdentity)
 121                         {
 122                                 ((ClientIdentity)identity).ClientProxy = (MarshalByRefObject) GetTransparentProxy();
 123                                 _targetUri = ((ClientIdentity)identity).TargetUri;
 124                         }
 125                         else
 126                                 _targetUri = identity.ObjectUri;
 127
 128                         if (_objectIdentity.EnvoySink != null)
 129                         {
 130                                 _sink = _objectIdentity.EnvoySink;
 131                                 _hasEnvoySink = true;
 132                         }
 133                         else
 134                                 _sink = _objectIdentity.ChannelSink;
 135
 136                         _ctorCall = null;       // Object already constructed
 137                 }
 138
 139                 internal IMessage ActivateRemoteObject (IMethodMessage request)
 140                 {
 141                         if (_ctorCall == null)  // It must be a WKO
 142                                 return new ConstructionResponse (this, null, (IMethodCallMessage) request);     // Ignore constructor call for WKOs
 143
 144                         _ctorCall.CopyFrom (request);
 145                         return ActivationServices.Activate (this, _ctorCall);
 146                 }
 147
 148                 public string TypeName
 149                 {
 150                         get
 151                         {
 152                                 if (_objectIdentity is ClientIdentity) {
 153                                         ObjRef oref = _objectIdentity.CreateObjRef (null);
 154                                         if (oref.TypeInfo != null) return oref.TypeInfo.TypeName;
 155                                 }
 156                                 return GetProxiedType().AssemblyQualifiedName;
 157                         }
 158
 159                         set
 160                         {
 161                                 throw new NotSupportedException ();
 162                         }
 163                 }
 164
 165                 public bool CanCastTo (Type fromType, object o)
 166                 {
 167                         if (_objectIdentity is ClientIdentity) {
 168                                 ObjRef oref = _objectIdentity.CreateObjRef (null);
 169                                 if (oref.IsReferenceToWellKnow && (fromType.IsInterface || GetProxiedType() == typeof(MarshalByRefObject))) return true;
 170                                 if (oref.TypeInfo != null) return oref.TypeInfo.CanCastTo (fromType, o);
 171                         }
 172                         return fromType.IsAssignableFrom (GetProxiedType());
 173                 }
 174
 175                 ~RemotingProxy()
 176                 {
 177                         if (_objectIdentity != null)
 178                         {
 179                                 if (!(_objectIdentity is ClientActivatedIdentity))      // Local CBO proxy?
 180                                         RemotingServices.DisposeIdentity (_objectIdentity);
 181                         }
 182                 }
 183
 184         }
 185 }