RealProxy Konstruktory
Definice
Důležité
Některé informace platí pro předběžně vydaný produkt, který se může zásadně změnit, než ho výrobce nebo autor vydá. Microsoft neposkytuje žádné záruky, výslovné ani předpokládané, týkající se zde uváděných informací.
Inicializuje novou instanci RealProxy třídy .
Přetížení
RealProxy() |
Inicializuje novou instanci třídy RealProxy s výchozími hodnotami. |
RealProxy(Type) |
Inicializuje novou instanci RealProxy třídy, která představuje vzdálený objekt zadaného Typeobjektu . |
RealProxy(Type, IntPtr, Object) |
Inicializuje novou instanci RealProxy třídy . |
RealProxy()
Inicializuje novou instanci třídy RealProxy s výchozími hodnotami.
protected:
RealProxy();
protected RealProxy ();
Protected Sub New ()
Příklady
using namespace System;
using namespace System::Collections;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Activation;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Proxies;
using namespace System::Runtime::Remoting::Messaging;
using namespace System::Runtime::Remoting::Contexts;
using namespace System::Security::Permissions;
ref class CustomServer;
[SecurityPermissionAttribute(SecurityAction::Demand, Flags=SecurityPermissionFlag::Infrastructure)]
public ref class MyProxy: public RealProxy
{
private:
String^ myUri;
MarshalByRefObject^ myMarshalByRefObject;
public:
MyProxy()
: RealProxy()
{
Console::WriteLine( "MyProxy Constructor Called..." );
myMarshalByRefObject = dynamic_cast<MarshalByRefObject^>(Activator::CreateInstance( CustomServer::typeid ));
ObjRef^ myObjRef = RemotingServices::Marshal( myMarshalByRefObject );
myUri = myObjRef->URI;
}
MyProxy( Type^ type1 )
: RealProxy( type1 )
{
Console::WriteLine( "MyProxy Constructor Called..." );
myMarshalByRefObject = dynamic_cast<MarshalByRefObject^>(Activator::CreateInstance( type1 ));
ObjRef^ myObjRef = RemotingServices::Marshal( myMarshalByRefObject );
myUri = myObjRef->URI;
}
MyProxy( Type^ type1, MarshalByRefObject^ targetObject )
: RealProxy( type1 )
{
Console::WriteLine( "MyProxy Constructor Called..." );
myMarshalByRefObject = targetObject;
ObjRef^ myObjRef = RemotingServices::Marshal( myMarshalByRefObject );
myUri = myObjRef->URI;
}
virtual IMessage^ Invoke( IMessage^ myMessage ) override
{
Console::WriteLine( "MyProxy 'Invoke method' Called..." );
if ( dynamic_cast<IMethodCallMessage^>(myMessage) )
{
Console::WriteLine( "IMethodCallMessage*" );
}
if ( dynamic_cast<IMethodReturnMessage^>(myMessage) )
{
Console::WriteLine( "IMethodReturnMessage*" );
}
if ( dynamic_cast<IConstructionCallMessage^>(myMessage) )
{
// Initialize a new instance of remote object
IConstructionReturnMessage^ myIConstructionReturnMessage = this->InitializeServerObject( static_cast<IConstructionCallMessage^>(myMessage) );
ConstructionResponse^ constructionResponse = gcnew ConstructionResponse( nullptr,static_cast<IMethodCallMessage^>(myMessage) );
return constructionResponse;
}
IDictionary^ myIDictionary = myMessage->Properties;
IMessage^ returnMessage;
myIDictionary[ "__Uri" ] = myUri;
// Synchronously dispatch messages to server.
returnMessage = ChannelServices::SyncDispatchMessage( myMessage );
// Pushing return value and OUT parameters back onto stack.
IMethodReturnMessage^ myMethodReturnMessage = dynamic_cast<IMethodReturnMessage^>(returnMessage);
return returnMessage;
}
virtual ObjRef^ CreateObjRef( Type^ ServerType ) override
{
Console::WriteLine( "CreateObjRef Method Called ..." );
CustomObjRef ^ myObjRef = gcnew CustomObjRef( myMarshalByRefObject,ServerType );
myObjRef->URI = myUri;
return myObjRef;
}
[System::Security::Permissions::SecurityPermissionAttribute(
System::Security::Permissions::SecurityAction::LinkDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
virtual void GetObjectData( SerializationInfo^ info, StreamingContext context ) override
{
// Add your custom data if any here.
RealProxy::GetObjectData( info, context );
}
[System::Security::Permissions::SecurityPermissionAttribute(
System::Security::Permissions::SecurityAction::Demand,
Flags=System::Security::Permissions::SecurityPermissionFlag::SerializationFormatter)]
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::InheritanceDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
ref class CustomObjRef: public ObjRef
{
public:
CustomObjRef( MarshalByRefObject^ myMarshalByRefObject, Type^ serverType )
: ObjRef( myMarshalByRefObject, serverType )
{
Console::WriteLine( "ObjRef 'Constructor' called" );
}
// Override this method to store custom data.
virtual void GetObjectData( SerializationInfo^ info, StreamingContext context ) override
{
ObjRef::GetObjectData( info, context );
}
};
};
[AttributeUsageAttribute(AttributeTargets::Class)]
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::LinkDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::InheritanceDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
public ref class MyProxyAttribute: public ProxyAttribute
{
public:
MyProxyAttribute(){}
// Create an instance of ServicedComponentProxy
virtual MarshalByRefObject^ CreateInstance( Type^ serverType ) override
{
return ProxyAttribute::CreateInstance( serverType );
}
virtual RealProxy^ CreateProxy( ObjRef^ objRef1, Type^ serverType, Object^ serverObject, Context^ serverContext ) override
{
MyProxy^ myCustomProxy = gcnew MyProxy( serverType );
if ( serverContext != nullptr )
{
RealProxy::SetStubData( myCustomProxy, serverContext );
}
if ( ( !serverType->IsMarshalByRef) && (serverContext == nullptr) )
{
throw gcnew RemotingException( "Bad Type for CreateProxy" );
}
return myCustomProxy;
}
};
[MyProxyAttribute]
ref class CustomServer: public ContextBoundObject
{
public:
CustomServer()
{
Console::WriteLine( "CustomServer Base Class constructor called" );
}
void HelloMethod( String^ str )
{
Console::WriteLine( "HelloMethod of Server is invoked with message : {0}", str );
}
};
// Acts as a custom proxy user.
int main()
{
Console::WriteLine( "" );
Console::WriteLine( "CustomProxy Sample" );
Console::WriteLine( "================" );
Console::WriteLine( "" );
// Create an instance of MyProxy.
MyProxy^ myProxyInstance = gcnew MyProxy( CustomServer::typeid );
// Get a CustomServer proxy.
CustomServer^ myHelloServer = static_cast<CustomServer^>(myProxyInstance->GetTransparentProxy());
// Get stubdata.
Console::WriteLine( "GetStubData = {0}", RealProxy::GetStubData( myProxyInstance ) );
// Get ProxyType.
Console::WriteLine( "Type of object represented by RealProxy is : {0}", myProxyInstance->GetProxiedType() );
myHelloServer->HelloMethod( "RealProxy Sample" );
Console::WriteLine( "" );
// Get a reference object from server.
Console::WriteLine( "Create an objRef object to be marshalled across Application Domains..." );
ObjRef^ CustomObjRef = myProxyInstance->CreateObjRef( CustomServer::typeid );
Console::WriteLine( "URI of 'ObjRef' object = {0}", CustomObjRef->URI );
return 0;
}
using System;
using System.Collections;
using System.Runtime.Serialization;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Proxies;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Contexts;
namespace Samples
{
[AttributeUsage(AttributeTargets.Class)]
public class MyProxyAttribute : ProxyAttribute
{
public MyProxyAttribute()
{
}
// Create an instance of ServicedComponentProxy
public override MarshalByRefObject CreateInstance(Type serverType)
{
return base.CreateInstance(serverType);
}
public override RealProxy CreateProxy(ObjRef objRef1,
Type serverType,
object serverObject,
Context serverContext)
{
MyProxy myCustomProxy = new MyProxy(serverType);
if(serverContext != null)
{
RealProxy.SetStubData(myCustomProxy,serverContext);
}
if((!serverType.IsMarshalByRef)&&(serverContext == null))
{
throw new RemotingException("Bad Type for CreateProxy");
}
return myCustomProxy;
}
}
[MyProxyAttribute]
public class CustomServer :ContextBoundObject
{
public CustomServer()
{
Console.WriteLine("CustomServer Base Class constructor called");
}
public void HelloMethod(string str)
{
Console.WriteLine("HelloMethod of Server is invoked with message : " + str);
}
}
public class MyProxy : RealProxy
{
String myUri;
MarshalByRefObject myMarshalByRefObject;
public MyProxy(): base()
{
Console.WriteLine("MyProxy Constructor Called...");
myMarshalByRefObject = (MarshalByRefObject)Activator.CreateInstance(typeof(CustomServer));
ObjRef myObjRef = RemotingServices.Marshal(myMarshalByRefObject);
myUri = myObjRef.URI;
}
public MyProxy(Type type1): base(type1)
{
Console.WriteLine("MyProxy Constructor Called...");
myMarshalByRefObject = (MarshalByRefObject)Activator.CreateInstance(type1);
ObjRef myObjRef = RemotingServices.Marshal(myMarshalByRefObject);
myUri = myObjRef.URI;
}
public MyProxy(Type type1, MarshalByRefObject targetObject) : base(type1)
{
Console.WriteLine("MyProxy Constructor Called...");
myMarshalByRefObject = targetObject;
ObjRef myObjRef = RemotingServices.Marshal(myMarshalByRefObject);
myUri = myObjRef.URI;
}
public override IMessage Invoke(IMessage myMessage)
{
Console.WriteLine("MyProxy 'Invoke method' Called...");
if (myMessage is IMethodCallMessage)
{
Console.WriteLine("IMethodCallMessage");
}
if (myMessage is IMethodReturnMessage)
{
Console.WriteLine("IMethodReturnMessage");
}
if (myMessage is IConstructionCallMessage)
{
// Initialize a new instance of remote object
IConstructionReturnMessage myIConstructionReturnMessage =
this.InitializeServerObject((IConstructionCallMessage)myMessage);
ConstructionResponse constructionResponse = new
ConstructionResponse(null,(IMethodCallMessage) myMessage);
return constructionResponse;
}
IDictionary myIDictionary = myMessage.Properties;
IMessage returnMessage;
myIDictionary["__Uri"] = myUri;
// Synchronously dispatch messages to server.
returnMessage = ChannelServices.SyncDispatchMessage(myMessage);
// Pushing return value and OUT parameters back onto stack.
IMethodReturnMessage myMethodReturnMessage = (IMethodReturnMessage)returnMessage;
return returnMessage;
}
public override ObjRef CreateObjRef(Type ServerType)
{
Console.WriteLine ("CreateObjRef Method Called ...");
CustomObjRef myObjRef = new CustomObjRef(myMarshalByRefObject,ServerType);
myObjRef.URI = myUri ;
return myObjRef;
}
public override void GetObjectData( SerializationInfo info,
StreamingContext context)
{
// Add your custom data if any here.
base.GetObjectData(info, context);
}
public class CustomObjRef :ObjRef
{
public CustomObjRef(MarshalByRefObject myMarshalByRefObject,Type serverType):
base(myMarshalByRefObject,serverType)
{
Console.WriteLine("ObjRef 'Constructor' called");
}
// Override this method to store custom data.
public override void GetObjectData(SerializationInfo info,
StreamingContext context)
{
base.GetObjectData(info,context);
}
}
}
public class ProxySample
{
// Acts as a custom proxy user.
public static void Main()
{
Console.WriteLine("");
Console.WriteLine("CustomProxy Sample");
Console.WriteLine("================");
Console.WriteLine("");
// Create an instance of MyProxy.
MyProxy myProxyInstance = new MyProxy(typeof(CustomServer));
// Get a CustomServer proxy.
CustomServer myHelloServer = (CustomServer)myProxyInstance.GetTransparentProxy();
// Get stubdata.
Console.WriteLine("GetStubData = " + RealProxy.GetStubData(myProxyInstance).ToString());
// Get ProxyType.
Console.WriteLine("Type of object represented by RealProxy is :"
+ myProxyInstance.GetProxiedType());
myHelloServer.HelloMethod("RealProxy Sample");
Console.WriteLine("");
// Get a reference object from server.
Console.WriteLine("Create an objRef object to be marshalled across Application Domains...");
ObjRef CustomObjRef = myProxyInstance.CreateObjRef(typeof(CustomServer));
Console.WriteLine("URI of 'ObjRef' object = " + CustomObjRef.URI);
}
}
}
Imports System.Collections
Imports System.Runtime.Serialization
Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Activation
Imports System.Runtime.Remoting.Channels
Imports System.Runtime.Remoting.Proxies
Imports System.Runtime.Remoting.Messaging
Imports System.Runtime.Remoting.Contexts
Imports System.Security.Permissions
Namespace Samples
<SecurityPermissionAttribute(SecurityAction.Demand, Flags := SecurityPermissionFlag.Infrastructure), _
AttributeUsage(AttributeTargets.Class)> _
Public Class MyProxyAttribute
Inherits ProxyAttribute
Public Sub New()
End Sub
' Create an instance of ServicedComponentProxy
Public Overrides Function CreateInstance(serverType As Type) As MarshalByRefObject
Return MyBase.CreateInstance(serverType)
End Function 'CreateInstance
Public Overrides Function CreateProxy(objRef1 As ObjRef, serverType As Type, _
serverObject As Object, serverContext As Context) As RealProxy
Dim myCustomProxy As New MyProxy(serverType)
If Not (serverContext Is Nothing) Then
RealProxy.SetStubData(myCustomProxy, serverContext)
End If
If Not serverType.IsMarshalByRef And serverContext Is Nothing Then
Throw New RemotingException("Bad Type for CreateProxy")
End If
Return myCustomProxy
End Function 'CreateProxy
End Class
<MyProxyAttribute()> _
Public Class CustomServer
Inherits ContextBoundObject
Public Sub New()
Console.WriteLine("CustomServer Base Class constructor called")
End Sub
Public Sub HelloMethod(str As String)
Console.WriteLine("HelloMethod of Server is invoked with message : " + str)
End Sub
End Class
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
Public Class MyProxy
Inherits RealProxy
Private myUri As String
Private myMarshalByRefObject As MarshalByRefObject
Public Sub New()
MyBase.New()
Console.WriteLine("MyProxy Constructor Called...")
myMarshalByRefObject = _
CType(Activator.CreateInstance(GetType(CustomServer)), MarshalByRefObject)
Dim myObjRef As ObjRef = RemotingServices.Marshal(myMarshalByRefObject)
myUri = myObjRef.URI
End Sub
Public Sub New(type1 As Type)
MyBase.New(type1)
Console.WriteLine("MyProxy Constructor Called...")
myMarshalByRefObject = CType(Activator.CreateInstance(type1), MarshalByRefObject)
Dim myObjRef As ObjRef = RemotingServices.Marshal(myMarshalByRefObject)
myUri = myObjRef.URI
End Sub
Public Sub New(type1 As Type, targetObject As MarshalByRefObject)
MyBase.New(type1)
Console.WriteLine("MyProxy Constructor Called...")
myMarshalByRefObject = targetObject
Dim myObjRef As ObjRef = RemotingServices.Marshal(myMarshalByRefObject)
myUri = myObjRef.URI
End Sub
Public Overrides Function Invoke(myMessage As IMessage) As IMessage
Console.WriteLine("MyProxy 'Invoke method' Called...")
If TypeOf myMessage Is IMethodCallMessage Then
Console.WriteLine("IMethodCallMessage")
End If
If TypeOf myMessage Is IMethodReturnMessage Then
Console.WriteLine("IMethodReturnMessage")
End If
If TypeOf myMessage Is IConstructionCallMessage Then
' Initialize a new instance of remote object
Dim myIConstructionReturnMessage As IConstructionReturnMessage = _
Me.InitializeServerObject(CType(myMessage, IConstructionCallMessage))
Dim constructionResponse As _
New ConstructionResponse(Nothing, CType(myMessage, IMethodCallMessage))
Return constructionResponse
End If
Dim myIDictionary As IDictionary = myMessage.Properties
Dim returnMessage As IMessage
myIDictionary("__Uri") = myUri
' Synchronously dispatch messages to server.
returnMessage = ChannelServices.SyncDispatchMessage(myMessage)
' Pushing return value and OUT parameters back onto stack.
Dim myMethodReturnMessage As IMethodReturnMessage = _
CType(returnMessage, IMethodReturnMessage)
Return returnMessage
End Function 'Invoke
Public Overrides Function CreateObjRef(ServerType As Type) As ObjRef
Console.WriteLine("CreateObjRef Method Called ...")
Dim myObjRef As New CustomObjRef(myMarshalByRefObject, ServerType)
myObjRef.URI = myUri
Return myObjRef
End Function 'CreateObjRef
Public Overrides Sub GetObjectData(info As SerializationInfo, context As StreamingContext)
' Add your custom data if any here.
MyBase.GetObjectData(info, context)
End Sub
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
Public Class CustomObjRef
Inherits ObjRef
Public Sub New(myMarshalByRefObject As MarshalByRefObject, serverType As Type)
MyBase.New(myMarshalByRefObject, serverType)
Console.WriteLine("ObjRef 'Constructor' called")
End Sub
' Override this method to store custom data.
<SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter:=true)> _
Public Overrides Sub GetObjectData(info As SerializationInfo, context As StreamingContext)
MyBase.GetObjectData(info, context)
End Sub
End Class
End Class
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
Public Class ProxySample
' Acts as a custom proxy user.
Public Shared Sub Main()
Console.WriteLine("")
Console.WriteLine("CustomProxy Sample")
Console.WriteLine("================")
Console.WriteLine("")
' Create an instance of MyProxy.
Dim myProxyInstance As New MyProxy(GetType(CustomServer))
' Get a CustomServer proxy.
Dim myHelloServer As CustomServer = _
CType(myProxyInstance.GetTransparentProxy(), CustomServer)
' Get stubdata.
Console.WriteLine("GetStubData = " + RealProxy.GetStubData(myProxyInstance).ToString())
' Get ProxyType.
Console.WriteLine("Type of object represented by RealProxy is :" + _
myProxyInstance.GetProxiedType().ToString())
myHelloServer.HelloMethod("RealProxy Sample")
Console.WriteLine("")
' Get a reference object from server.
Console.WriteLine("Create an objRef object to be marshalled across Application Domains...")
Dim CustomObjRef As ObjRef = myProxyInstance.CreateObjRef(GetType(CustomServer))
Console.WriteLine("URI of 'ObjRef' object = " + CustomObjRef.URI)
End Sub
End Class
End Namespace 'Samples.AspNet.VB
Platí pro
RealProxy(Type)
protected:
RealProxy(Type ^ classToProxy);
protected RealProxy (Type classToProxy);
[System.Security.SecurityCritical]
protected RealProxy (Type classToProxy);
new System.Runtime.Remoting.Proxies.RealProxy : Type -> System.Runtime.Remoting.Proxies.RealProxy
[<System.Security.SecurityCritical>]
new System.Runtime.Remoting.Proxies.RealProxy : Type -> System.Runtime.Remoting.Proxies.RealProxy
Protected Sub New (classToProxy As Type)
Parametry
- Atributy
Výjimky
classToProxy
není rozhraní a není odvozeno z MarshalByRefObject.
Příklady
// Create an instance of MyProxy.
MyProxy^ myProxyInstance = gcnew MyProxy( CustomServer::typeid );
// Get a CustomServer proxy.
CustomServer^ myHelloServer = static_cast<CustomServer^>(myProxyInstance->GetTransparentProxy());
// Create an instance of MyProxy.
MyProxy myProxyInstance = new MyProxy(typeof(CustomServer));
// Get a CustomServer proxy.
CustomServer myHelloServer = (CustomServer)myProxyInstance.GetTransparentProxy();
' Create an instance of MyProxy.
Dim myProxyInstance As New MyProxy(GetType(CustomServer))
' Get a CustomServer proxy.
Dim myHelloServer As CustomServer = _
CType(myProxyInstance.GetTransparentProxy(), CustomServer)
Poznámky
Aktuální metoda vytvoří transparentní proxy server, ke kterému je možné přistupovat prostřednictvím GetTransparentProxy metody .
Klient, který používá objekt přes jakýkoli druh hranice vzdálené komunikace, ve skutečnosti pro objekt používá transparentní proxy server. Transparentní proxy server dává dojem, že se skutečný objekt nachází v prostoru klienta. Dosahuje toho přesměrováním volání provedených na skutečném objektu pomocí infrastruktury vzdálené komunikace.
Transparentní proxy server je uložený instancí třídy spravovaného modulu runtime RealProxy. Implementuje RealProxy část funkce, která je potřebná k předávání operací z transparentního proxy serveru. Všimněte si, že objekt proxy dědí přidruženou sémantiku spravovaných objektů, jako je uvolňování paměti a podpora polí a metod, a může být rozšířen o nové třídy. Proxy server má duální povahu: funguje jako objekt stejné třídy jako vzdálený objekt (transparentní proxy server) a je samotným spravovaným objektem.
Platí pro
RealProxy(Type, IntPtr, Object)
Inicializuje novou instanci RealProxy třídy .
protected:
RealProxy(Type ^ classToProxy, IntPtr stub, System::Object ^ stubData);
protected RealProxy (Type classToProxy, IntPtr stub, object stubData);
[System.Security.SecurityCritical]
protected RealProxy (Type classToProxy, IntPtr stub, object stubData);
new System.Runtime.Remoting.Proxies.RealProxy : Type * nativeint * obj -> System.Runtime.Remoting.Proxies.RealProxy
[<System.Security.SecurityCritical>]
new System.Runtime.Remoting.Proxies.RealProxy : Type * nativeint * obj -> System.Runtime.Remoting.Proxies.RealProxy
Protected Sub New (classToProxy As Type, stub As IntPtr, stubData As Object)
Parametry
- stub
-
IntPtr
nativeint
Zástupná procedura, která se má přidružit k nové instanci proxy.
- stubData
- Object
Zástupná data, která se mají nastavit pro zadanou zástupnou proceduru a novou instanci proxy serveru.
- Atributy
Výjimky
classToProxy
není rozhraní a není odvozeno z MarshalByRefObject.
Poznámky
Zástupná data používají vlastní uživatelé proxy k rozhodování, co dělat s příchozím voláním metody. Zástupnými daty můžou být například informace o kontextu serveru, které můžete použít k určení, jestli se má volání spustit místně, nebo jestli ho odeslat přes infrastrukturu vzdálené komunikace.