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
  56                 internal RemotingProxy (Type type, ClientIdentity identity) : base (type, identity)
  57                 {
  58                         _sink = identity.ChannelSink;
  59                         _hasEnvoySink = false;
  60                         _targetUri = identity.TargetUri;
  61                 }
  62
  63                 internal RemotingProxy (Type type, string activationUrl, object[] activationAttributes) : base (type)
  64                 {
  65                         _hasEnvoySink = false;
  66                         _ctorCall = ActivationServices.CreateConstructionCall (type, activationUrl, activationAttributes);
  67                 }
  68
  69                 public override IMessage Invoke (IMessage request)
  70                 {
  71                         IMethodCallMessage mm = request as IMethodCallMessage;
  72
  73                         if (mm != null) {
  74                                 if (mm.MethodBase == _cache_GetHashCodeMethod)
  75                                         return new MethodResponse(ObjectIdentity.GetHashCode(), null, null, mm);
  76
  77                                 if (mm.MethodBase == _cache_GetTypeMethod)
  78                                         return new MethodResponse(GetProxiedType(), null, null, mm);
  79                         }
  80
  81                         IInternalMessage im = request as IInternalMessage;
  82                         if (im != null) {
  83                                 if (im.Uri == null) im.Uri = _targetUri;
  84                                 im.TargetIdentity = _objectIdentity;
  85                         }
  86
  87                         _objectIdentity.NotifyClientDynamicSinks (true, request, true, false);
  88
  89                         IMessage response;
  90                         IMessageSink sink;
  91
  92                         // Needs to go through the client context sink?
  93                         if (Thread.CurrentContext.HasExitSinks && !_hasEnvoySink)
  94                                 sink = Thread.CurrentContext.GetClientContextSinkChain ();
  95                         else
  96                                 sink = _sink;
  97
  98                         MonoMethodMessage mMsg = request as MonoMethodMessage;
  99                         if (mMsg == null || mMsg.CallType == CallType.Sync)
 100                                 response = sink.SyncProcessMessage (request);
 101                         else
 102                         {
 103                                 AsyncResult ares = mMsg.AsyncResult;
 104                                 IMessageCtrl mctrl = sink.AsyncProcessMessage (request, ares);
 105                                 if (ares != null) ares.SetMessageCtrl (mctrl);
 106                                 response = new ReturnMessage (null, new object[0], 0, null, mMsg);
 107                         }
 108
 109                         _objectIdentity.NotifyClientDynamicSinks (false, request, true, false);
 110
 111                         return response;
 112                 }
 113
 114                 internal void AttachIdentity (Identity identity)
 115                 {
 116                         _objectIdentity = identity;
 117
 118                         if (identity is ClientActivatedIdentity)        // It is a CBO
 119                         {
 120                                 ClientActivatedIdentity cai = (ClientActivatedIdentity)identity;
 121                                 _targetContext = cai.Context;
 122                                 AttachServer (cai.GetServerObject ());
 123                                 cai.SetClientProxy ((MarshalByRefObject) GetTransparentProxy());
 124                         }
 125
 126                         if (identity is ClientIdentity)
 127                         {
 128                                 ((ClientIdentity)identity).ClientProxy = (MarshalByRefObject) GetTransparentProxy();
 129                                 _targetUri = ((ClientIdentity)identity).TargetUri;
 130                         }
 131                         else
 132                                 _targetUri = identity.ObjectUri;
 133
 134                         if (_objectIdentity.EnvoySink != null)
 135                         {
 136                                 _sink = _objectIdentity.EnvoySink;
 137                                 _hasEnvoySink = true;
 138                         }
 139                         else
 140                                 _sink = _objectIdentity.ChannelSink;
 141
 142                         _ctorCall = null;       // Object already constructed
 143                 }
 144
 145                 internal IMessage ActivateRemoteObject (IMethodMessage request)
 146                 {
 147                         if (_ctorCall == null)  // It must be a WKO
 148                                 return new ConstructionResponse (this, null, (IMethodCallMessage) request);     // Ignore constructor call for WKOs
 149
 150                         _ctorCall.CopyFrom (request);
 151                         return ActivationServices.Activate (this, _ctorCall);
 152                 }
 153
 154                 public string TypeName
 155                 {
 156                         get
 157                         {
 158                                 if (_objectIdentity is ClientIdentity) {
 159                                         ObjRef oref = _objectIdentity.CreateObjRef (null);
 160                                         if (oref.TypeInfo != null) return oref.TypeInfo.TypeName;
 161                                 }
 162                                 return GetProxiedType().AssemblyQualifiedName;
 163                         }
 164
 165                         set
 166                         {
 167                                 throw new NotSupportedException ();
 168                         }
 169                 }
 170
 171                 public bool CanCastTo (Type fromType, object o)
 172                 {
 173                         if (_objectIdentity is ClientIdentity) {
 174                                 ObjRef oref = _objectIdentity.CreateObjRef (null);
 175                                 if (oref.IsReferenceToWellKnow && (fromType.IsInterface || GetProxiedType() == typeof(MarshalByRefObject))) return true;
 176                                 if (oref.TypeInfo != null) return oref.TypeInfo.CanCastTo (fromType, o);
 177                         }
 178                         return fromType.IsAssignableFrom (GetProxiedType());
 179                 }
 180
 181                 ~RemotingProxy()
 182                 {
 183                         if (_objectIdentity != null)
 184                         {
 185                                 if (!(_objectIdentity is ClientActivatedIdentity))      // Local CBO proxy?
 186                                         RemotingServices.DisposeIdentity (_objectIdentity);
 187                         }
 188                 }
 189
 190         }
 191 }