IMethodMessage インターフェイスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

IMethodMessage インターフェイス

メソッドメッセージのインターフェイスを定義します。

名前空間: System.Runtime.Remoting.Messaging
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<ComVisibleAttribute(True)> _
Public Interface IMethodMessage
    Inherits IMessage

Visual Basic (使用法)

Dim instance As IMethodMessage

[ComVisibleAttribute(true)] 
public interface IMethodMessage : IMessage

C++

[ComVisibleAttribute(true)] 
public interface class IMethodMessage : IMessage

/** @attribute ComVisibleAttribute(true) */ 
public interface IMethodMessage extends IMessage

JScript

ComVisibleAttribute(true) 
public interface IMethodMessage extends IMessage

解説

メソッドメッセージは、リモートのメソッドに情報を送信したり、リモートのメソッドから情報を受信したりするために使用します。たとえば、リモートのメソッド呼び出しに使用されるメッセージは、IMethodMessage インターフェイスを実装します。

使用例

RealProxy.Invoke をオーバーライドして、メッセージの情報をコンソールに書き込むカスタムプロキシについては、次のコード例を参照してください。この例では、リモート呼び出しを実行せずすぐに制御を戻します。

Visual Basic

<PermissionSet(SecurityAction.Demand, Name:="FullTrust")>
 _
Public Class MyProxyClass
   Inherits RealProxy
   Private myObjectInstance As Object
 = Nothing
   Private myType As Type = Nothing
   
   Public Sub New(argType
 As Type)
      MyBase.New(argType)
      myType = argType
      myObjectInstance = Activator.CreateInstance(argType)
   End Sub 'New
   
   ' Overriding the Invoke method of RealProxy.
   Public Overrides Function
 Invoke(message As IMessage) As IMessage
      Dim myMethodMessage As IMethodMessage
 = CType(message, IMethodMessage)
      
      Console.WriteLine("**** Begin Invoke ****")
      Console.WriteLine(ControlChars.Tab + "Type is : "
 + myType.ToString())
      Console.WriteLine(ControlChars.Tab + "Method name : "
 + myMethodMessage.MethodName)
      
      Dim i As Integer
      For i = 0 To myMethodMessage.ArgCount
 - 1
         Console.WriteLine(ControlChars.Tab + "ArgName is : "
 + myMethodMessage.GetArgName(i))
         Console.WriteLine(ControlChars.Tab + "ArgValue is: "
 + myMethodMessage.GetArg(i))
      Next i
      
      If myMethodMessage.HasVarArgs Then
         Console.WriteLine(ControlChars.Tab + " The method have
 variable arguments!!")
      Else
         Console.WriteLine(ControlChars.Tab + " The method does
 not have variable arguments!!")
      End If 
      ' Dispatch the method call to the real object.
      Dim returnValue As Object
 = myType.InvokeMember(myMethodMessage.MethodName, _
                     BindingFlags.InvokeMethod, Nothing, myObjectInstance,
 myMethodMessage.Args)
      Console.WriteLine("**** End Invoke ****")
      
      ' Build the return message to pass back to the transparent proxy.
      Dim myReturnMessage As New
 ReturnMessage(returnValue, Nothing, 0, Nothing,
 _
                                                         CType(message, IMethodCallMessage))
      Return myReturnMessage
   End Function 'Invoke
End Class 'MyProxyClass

[PermissionSet(SecurityAction.Demand, Name="FullTrust")]
public class MyProxyClass : RealProxy
{
   private Object  myObjectInstance  = null;
   private Type    myType      = null;

   public MyProxyClass(Type argType) : base(argType)
   {
      myType = argType;
      myObjectInstance = Activator.CreateInstance(argType);
   }

   // Overriding the Invoke method of RealProxy.
   public override IMessage Invoke(IMessage message)
   {
      IMethodMessage myMethodMessage = (IMethodMessage)message;

      Console.WriteLine("**** Begin Invoke ****");
      Console.WriteLine("\tType is : " + myType);
      Console.WriteLine("\tMethod name : " +  myMethodMessage.MethodName);

      for (int i=0; i < myMethodMessage.ArgCount;
 i++)
      {
         Console.WriteLine("\tArgName is : " + myMethodMessage.GetArgName(i));
         Console.WriteLine("\tArgValue is: " + myMethodMessage.GetArg(i));
      }

      if(myMethodMessage.HasVarArgs)
          Console.WriteLine("\t The method have variable arguments!!");
      else
          Console.WriteLine("\t The method does not have variable arguments!!");

      // Dispatch the method call to the real object.
      Object returnValue = myType.InvokeMember( myMethodMessage.MethodName, BindingFlags.InvokeMethod,
 null,
                                           myObjectInstance, myMethodMessage.Args
 );
      Console.WriteLine("**** End Invoke ****");

      // Build the return message to pass back to the transparent proxy.
      ReturnMessage myReturnMessage = new ReturnMessage( returnValue,
 null, 0, null,
          (IMethodCallMessage)message );
      return myReturnMessage;
   }
}

C++

// This class requires full trust
[PermissionSetAttribute(SecurityAction::Demand, Name = "FullTrust")]
public ref class MyProxyClass: public
 RealProxy
{
private:
   Object^ myObjectInstance;
   Type^ myType;

public:
   MyProxyClass( Type^ argType )
      : RealProxy( argType )
   {
      myType = argType;
      myObjectInstance = Activator::CreateInstance( argType );
   }

   // Overriding the Invoke method of RealProxy.
   virtual IMessage^ Invoke( IMessage^ message ) override
   {
      IMethodMessage^ myMethodMessage = dynamic_cast<IMethodMessage^>(message);
      Console::WriteLine( "**** Begin Invoke ****" );
      Console::WriteLine( "\tType is : {0}", myType );
      Console::WriteLine( "\tMethod name : {0}", myMethodMessage->MethodName
 );
      for ( int i = 0; i < myMethodMessage->ArgCount;
 i++ )
      {
         Console::WriteLine( "\tArgName is : {0}", myMethodMessage->GetArgName(
 i ) );
         Console::WriteLine( "\tArgValue is: {0}", myMethodMessage->GetArg(
 i ) );

      }
      if ( myMethodMessage->HasVarArgs )
            Console::WriteLine( "\t The method have variable arguments!!"
 );
      else
            Console::WriteLine( "\t The method does not have variable arguments!!"
 );

      
      // Dispatch the method call to the real Object*.
      Object^ returnValue = myType->InvokeMember( myMethodMessage->MethodName,
 BindingFlags::InvokeMethod, nullptr, myObjectInstance, myMethodMessage->Args
 );
      Console::WriteLine( "**** End Invoke ****" );
      
      // Build the return message to pass back to the transparent proxy.
      ReturnMessage^ myReturnMessage = gcnew ReturnMessage( returnValue,nullptr,0,nullptr,dynamic_cast<IMethodCallMessage^>(message)
 );
      return myReturnMessage;
   }
};