RemotingServices.ExecuteMessage メソッドとは何？わかりやすく解説 Weblio辞書

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.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

RemotingServices.ExecuteMessage メソッド

指定したリモートオブジェクトに接続し、そのオブジェクトで提供された IMethodCallMessage を実行します。

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

Visual Basic (宣言)

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

Visual Basic (使用法)

Dim target As MarshalByRefObject
Dim reqMsg As IMethodCallMessage
Dim returnValue As IMethodReturnMessage

returnValue = RemotingServices.ExecuteMessage(target, reqMsg)

public static IMethodReturnMessage ExecuteMessage
 (
    MarshalByRefObject target,
    IMethodCallMessage reqMsg
)

C++

public:
static IMethodReturnMessage^ ExecuteMessage (
    MarshalByRefObject^ target, 
    IMethodCallMessage^ reqMsg
)

public static IMethodReturnMessage ExecuteMessage
 (
    MarshalByRefObject target, 
    IMethodCallMessage reqMsg
)

JScript

public static function ExecuteMessage
 (
    target : MarshalByRefObject, 
    reqMsg : IMethodCallMessage
) : IMethodReturnMessage

パラメータ

target: メソッドを呼び出す対象のリモートオブジェクト。

reqMsg: 指定したリモートオブジェクトのメソッドへのメソッド呼び出しメッセージ。

戻り値
リモートメソッドの応答。

例外

例外の種類	条件
SecurityException	直前の呼び出し元に、インフラストラクチャアクセス許可がありません。
RemotingException	メソッドがオブジェクトのネイティブコンテキスト以外のコンテキストから呼び出されました。

解説

現在のメソッドは、特別な場合にサーバーによって使用され、指定したメソッドの呼び出しを別のオブジェクト (リモートオブジェクトの場合もある) に転送します。このメソッドは、呼び出し元が適切なコンテキスト内にある場合にだけ呼び出すことができます。

使用例

ExecuteMessage メソッドを使用して、リモートオブジェクトにメソッド呼び出しを転送する方法のコード例を次に示します。

Visual Basic

<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 'ProcessMessageStart

[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
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");
   }
}

C++

[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,boolean
 bClientSide,
    boolean bAsyncCall)
{
    Console.WriteLine("\nProcessMessageStart");
    Console.WriteLine("requestMessage = {0}", requestMessage);
    try {
        Console.WriteLine("SessionId = {0}.", RemotingServices.
            GetSessionIdForMethodMessage((IMethodMessage)requestMessage));
    }
    catch (InvalidCastException exp) {
        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.get_Uri());
        Console.WriteLine("TypeName = {0}", requestMethodCallMessage.
            get_TypeName());
        Console.WriteLine("MethodName = {0}", requestMethodCallMessage.
            get_MethodName());
        Console.WriteLine("ArgCount = {0}",
            (System.Int32)requestMethodCallMessage.get_ArgCount());
        Console.WriteLine("MethodCall.Args");            
        Object o = null;
        for (int iCtr = 0; iCtr < requestMethodCallMessage.get_Args().
            get_Length(); iCtr++) {
            o = requestMethodCallMessage.get_Args()[iCtr];
            Console.WriteLine("\t{0}", o);
        }
        // Sends this method call message to another server to replicate
        // the call at the second server.
        if (requestMethodCallMessage.get_Uri().Equals(replicatedServiceUri))
 {
            SampleService replicationService = (SampleService)(Activator.
                GetObject(SampleService.class.ToType(), 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.
                get_Exception());
            Console.WriteLine("\tReturnValue = {0}", returnMessage.
                get_ReturnValue());
            Console.WriteLine("\tOutArgCount = {0}", 
                (System.Int32)returnMessage.get_OutArgCount());
            Console.WriteLine("Return message OutArgs");              
                  
            for (int iCtr1 = 0; iCtr1 <
 requestMethodCallMessage.get_Args().
                get_Length(); iCtr1++) {
                o = requestMethodCallMessage.get_Args()[iCtr1];
                Console.WriteLine("\t{0}", o);
            }
        }
    }
    catch (InvalidCastException exp) {
        Console.WriteLine("The requestMessage is not a MethodCall");
    }
} //ProcessMessageStart

.NET Framework のセキュリティ

SecurityPermission (インフラストラクチャコードを操作するために必要なアクセス許可)。要求値 : SecurityAction.LinkDemand; アクセス許可値 : SecurityPermissionFlag.Infrastructure

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
RemotingServices クラス
RemotingServices メンバ
System.Runtime.Remoting 名前空間

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