RemotingServices.ExecuteMessage Método

Definición

Espacio de nombres:

System.Runtime.Remoting

Ensamblado:

mscorlib.dll

Se conecta al objeto remoto especificado y ejecuta la interfaz IMethodCallMessage suministrada en el mismo.

public:
 static System::Runtime::Remoting::Messaging::IMethodReturnMessage ^ ExecuteMessage(MarshalByRefObject ^ target, System::Runtime::Remoting::Messaging::IMethodCallMessage ^ reqMsg);

[System.Security.SecurityCritical]
public static System.Runtime.Remoting.Messaging.IMethodReturnMessage ExecuteMessage (MarshalByRefObject target, System.Runtime.Remoting.Messaging.IMethodCallMessage reqMsg);

[<System.Security.SecurityCritical>]
static member ExecuteMessage : MarshalByRefObject * System.Runtime.Remoting.Messaging.IMethodCallMessage -> System.Runtime.Remoting.Messaging.IMethodReturnMessage

Public Shared Function ExecuteMessage (target As MarshalByRefObject, reqMsg As IMethodCallMessage) As IMethodReturnMessage

Parámetros

target

MarshalByRefObject

Objeto remoto a cuyo método desea llamar.

reqMsg

IMethodCallMessage

Mensaje de llamada al método del objeto remoto especificado.

Devoluciones

IMethodReturnMessage

Respuesta del método remoto.

Atributos

SecurityCriticalAttribute

Excepciones

SecurityException

El llamador inmediato no tiene permisos de infraestructura.

RemotingException

Se llamó al método desde un contexto distinto al contexto nativo del objeto.

Ejemplos

En el ejemplo de código siguiente se muestra cómo usar el ExecuteMessage método para reenviar llamadas de método a objetos remotos.

[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::LinkDemand, 
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
virtual void ProcessMessageStart( IMessage^ requestMessage, bool /*bClientSide*/, bool /*bAsyncCall*/ )
{
   Console::WriteLine( "\nProcessMessageStart" );
   Console::WriteLine( "requestMessage = {0}", requestMessage );
   try
   {
      Console::WriteLine( "SessionId = {0}.", RemotingServices::GetSessionIdForMethodMessage( dynamic_cast<IMethodMessage^>(requestMessage) ) );
   }
   catch ( InvalidCastException^ ) 
   {
      Console::WriteLine( "The requestMessage is not an IMethodMessage*." );
   }

   IMethodCallMessage^ requestMethodCallMessage;
   try
   {
      requestMethodCallMessage = dynamic_cast<IMethodCallMessage^>(requestMessage);

      // Prints the details of the IMethodCallMessage* to the console.
      Console::WriteLine( "\nMethodCall details" );
      Console::WriteLine( "Uri = {0}", requestMethodCallMessage->Uri );
      Console::WriteLine( "TypeName = {0}", requestMethodCallMessage->TypeName );
      Console::WriteLine( "MethodName = {0}", requestMethodCallMessage->MethodName );
      Console::WriteLine( "ArgCount = {0}", requestMethodCallMessage->ArgCount );
      Console::WriteLine( "MethodCall::Args" );
      IEnumerator^ myEnum = requestMethodCallMessage->Args->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Object^ o = safe_cast<Object^>(myEnum->Current);
         Console::WriteLine( "\t {0}", o );

         // Sends this method call message to another server to replicate
         // the call at the second server.
         if ( requestMethodCallMessage->Uri == replicatedServiceUri )
         {
            String^ repSvr = String::Format(  "{0}{1}", const_cast<String^>(replicationServerUrl), const_cast<String^>(replicatedServiceUri) );
            SampleService^ replicationService = dynamic_cast<SampleService^>(Activator::GetObject( SampleService::typeid, repSvr ));
            IMethodReturnMessage^ returnMessage = RemotingServices::ExecuteMessage( replicationService, requestMethodCallMessage );

            // Prints the results of the method call stored in the IMethodReturnMessage*.
            Console::WriteLine( "\nMessage returned by ExecuteMessage." );
            Console::WriteLine( "\tException = {0}", returnMessage->Exception );
            Console::WriteLine( "\tReturnValue = {0}", returnMessage->ReturnValue );
            Console::WriteLine( "\tOutArgCount = {0}", returnMessage->OutArgCount );
            Console::WriteLine( "Return message OutArgs" );
            IEnumerator^ myEnum = requestMethodCallMessage->Args->GetEnumerator();
            while ( myEnum->MoveNext() )
            {
               Object^ o = safe_cast<Object^>(myEnum->Current);
               Console::WriteLine( "\t {0}", o );
            }
         }
      }
   }
   catch ( InvalidCastException^ ) 
   {
      Console::WriteLine( "The requestMessage is not a MethodCall" );
   }
}

public void ProcessMessageStart(IMessage requestMessage, bool bClientSide, bool bAsyncCall) {

   Console.WriteLine("\nProcessMessageStart");
   Console.WriteLine("requestMessage = {0}", requestMessage);

   try {
      Console.WriteLine("SessionId = {0}.",
          RemotingServices.GetSessionIdForMethodMessage((IMethodMessage)requestMessage));
   }
   catch (InvalidCastException) {
      Console.WriteLine("The requestMessage is not an IMethodMessage.");
   }

   IMethodCallMessage requestMethodCallMessage;

   try {
      requestMethodCallMessage = (IMethodCallMessage)requestMessage;
      // Prints the details of the IMethodCallMessage to the console.
      Console.WriteLine("\nMethodCall details");
      Console.WriteLine("Uri = {0}", requestMethodCallMessage.Uri);
      Console.WriteLine("TypeName = {0}", requestMethodCallMessage.TypeName);
      Console.WriteLine("MethodName = {0}", requestMethodCallMessage.MethodName);
      Console.WriteLine("ArgCount = {0}", requestMethodCallMessage.ArgCount);

      Console.WriteLine("MethodCall.Args");
      foreach(object o in requestMethodCallMessage.Args)
          Console.WriteLine("\t{0}", o);

      // Sends this method call message to another server to replicate
      // the call at the second server.
      if (requestMethodCallMessage.Uri == replicatedServiceUri) {

         SampleService replicationService =
            (SampleService)Activator.GetObject(typeof(SampleService),
            replicationServerUrl + replicatedServiceUri);

         IMethodReturnMessage returnMessage =
            RemotingServices.ExecuteMessage(replicationService, requestMethodCallMessage);

         // Prints the results of the method call stored in the IMethodReturnMessage.
         Console.WriteLine("\nMessage returned by ExecuteMessage.");
         Console.WriteLine("\tException = {0}", returnMessage.Exception);
         Console.WriteLine("\tReturnValue = {0}", returnMessage.ReturnValue);
         Console.WriteLine("\tOutArgCount = {0}", returnMessage.OutArgCount);
         Console.WriteLine("Return message OutArgs");

         foreach(object o in requestMethodCallMessage.Args)
            Console.WriteLine("\t{0}", o);
      }
   }
   catch (InvalidCastException) {
       Console.WriteLine("The requestMessage is not a MethodCall");
   }
}

<SecurityPermission(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.Infrastructure)> _
Public Sub ProcessMessageStart(requestMessage As IMessage, bClientSide As Boolean, bAsyncCall As Boolean) Implements IDynamicMessageSink.ProcessMessageStart

   Console.WriteLine(ControlChars.Cr + "ProcessMessageStart")
   Console.WriteLine("requestMessage = {0}", requestMessage)
   
   Try
      Console.WriteLine("SessionId = {0}.", RemotingServices.GetSessionIdForMethodMessage(CType(requestMessage, IMethodMessage)))
   Catch e As InvalidCastException
      Console.WriteLine("The requestMessage is not an IMethodMessage.")
   End Try
   
   Dim requestMethodCallMessage As IMethodCallMessage
   
   Try
      requestMethodCallMessage = CType(requestMessage, MethodCall)
      
      ' Prints the details of the IMethodCallMessage to the console
      Console.WriteLine(ControlChars.Cr + "MethodCall details")
      Console.WriteLine("Uri = {0}", requestMethodCallMessage.Uri)
      Console.WriteLine("TypeName = {0}", requestMethodCallMessage.TypeName)
      Console.WriteLine("MethodName = {0}", requestMethodCallMessage.MethodName)
      Console.WriteLine("ArgCount = {0}", requestMethodCallMessage.ArgCount)
      Console.WriteLine("MethodCall.Args")
      
      Dim o As Object
      For Each o In  requestMethodCallMessage.Args
         Console.WriteLine(ControlChars.Tab + "{0}", o)
      Next o 
      
      ' Sends this method call message to another server to replicate
      ' the call at the second server
      If requestMethodCallMessage.Uri = replicatedServiceUri Then
         
         Dim replicationService As SampleService = CType(Activator.GetObject(GetType(SampleService), replicationServerUrl + replicatedServiceUri), SampleService)
         Dim returnMessage As IMethodReturnMessage = RemotingServices.ExecuteMessage(replicationService, requestMethodCallMessage)
         
         ' Prints the results of the method call stored in the IMethodReturnMessage.
         Console.WriteLine(ControlChars.Cr + "Message returned by ExecuteMessage.")
         Console.WriteLine(ControlChars.Tab + "Exception = {0}", returnMessage.Exception)
         Console.WriteLine(ControlChars.Tab + "ReturnValue = {0}", returnMessage.ReturnValue)
         Console.WriteLine(ControlChars.Tab + "OutArgCount = {0}", returnMessage.OutArgCount)
         Console.WriteLine("Return message OutArgs")
         For Each o In  requestMethodCallMessage.Args
            Console.WriteLine(ControlChars.Tab + "{0}", o)
         Next o
         
      End If
      
   Catch e As InvalidCastException
      Console.WriteLine("The requestMessage is not a MethodCall")
   End Try

End Sub

Comentarios

El servidor usa el método actual en casos especiales para reenviar la llamada de método especificada a otro objeto, posiblemente remoto. Solo se puede llamar a este método cuando el autor de la llamada está en el contexto adecuado.