BaseChannelSinkWithProperties Class
Provides a base implementation for channel sinks that want to expose a dictionary interface to their properties.
Assembly: mscorlib (in mscorlib.dll)
'Declaration <ComVisibleAttribute(True)> _ <SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.Infrastructure)> _ <SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags := SecurityPermissionFlag.Infrastructure)> _ Public MustInherit Class BaseChannelSinkWithProperties _ Inherits BaseChannelObjectWithProperties 'Usage Dim instance As BaseChannelSinkWithProperties
Channel sinks provide a plug-in point that allows access to the underlying messages that are flowing through the channel as well as the stream that is used by the transport mechanism to send messages to a remote object. Channel sinks are linked together in a chain of channel sink providers, and all channel messages flow through this chain of sinks before the message is serialized and transported.
This class makes a link demand and an inheritance demand at the class level. A SecurityException is thrown when either the immediate caller or the derived class does not have infrastructure permission. For details about security demands, see Link Demands and Inheritance Demands.
Notes to Inheritors:When you inherit from BaseChannelSinkWithProperties, you must implement the Keys property and the Item property.
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _ Friend Class MyClientFormatterChannelSink Inherits BaseChannelSinkWithProperties Implements IClientChannelSink, IMessageSink Private nextClientSink As IClientChannelSink = Nothing Private nextMessageSink As IMessageSink = Nothing Public Sub New(nextSink As IClientChannelSink, nextMsgSink As IMessageSink) MyBase.New() nextClientSink = nextSink nextMessageSink = nextMsgSink End Sub 'New Public Sub ProcessMessage(msg As IMessage, requestHeaders As ITransportHeaders, _ requestStream As Stream, ByRef responseHeaders As ITransportHeaders, _ ByRef responseStream As Stream) _ Implements IClientChannelSink.ProcessMessage nextClientSink.ProcessMessage(msg, requestHeaders, requestStream, _ responseHeaders, responseStream) End Sub 'ProcessMessage Public Sub AsyncProcessRequest(sinkStack As IClientChannelSinkStack, _ msg As IMessage, headers As ITransportHeaders, myStream As Stream) _ Implements IClientChannelSink.AsyncProcessRequest sinkStack.Push(Me, Nothing) nextClientSink.AsyncProcessRequest(sinkStack, msg, headers, myStream) End Sub 'AsyncProcessRequest Public Sub AsyncProcessResponse(sinkStack As IClientResponseChannelSinkStack, _ state As Object, headers As ITransportHeaders, myStream As Stream) _ Implements IClientChannelSink.AsyncProcessResponse sinkStack.AsyncProcessResponse(headers, myStream) End Sub 'AsyncProcessResponse Public Function GetRequestStream(msg As IMessage, headers As ITransportHeaders) As Stream _ Implements IClientChannelSink.GetRequestStream Return Nothing End Function 'GetRequestStream Public ReadOnly Property NextChannelSink() As IClientChannelSink _ Implements IClientChannelSink.NextChannelSink Get Return nextClientSink End Get End Property Public ReadOnly Property NextSink() As IMessageSink _ Implements IMessageSink.NextSink Get Return nextMessageSink End Get End Property Public Overrides ReadOnly Property Properties() As Collections.IDictionary _ Implements IClientChannelSink.Properties Get End Get End Property Public Function AsyncProcessMessage(msg As IMessage, replySink As IMessageSink) As IMessageCtrl _ Implements IMessageSink.AsyncProcessMessage Return Nothing End Function 'AsyncProcessMessage Public Function SyncProcessMessage(msg As IMessage) As IMessage _ Implements IMessageSink.SyncProcessMessage Return nextMessageSink.SyncProcessMessage(msg) End Function 'SyncProcessMessage Default Public Overrides Property Item(key As Object) As Object Get If key Is GetType(MyKey) Then Return Me End If Return Nothing End Get Set Throw New NotSupportedException() End Set End Property Public Overrides ReadOnly Property Keys() As ICollection Get Dim myKeys As New ArrayList(0) myKeys.Add(GetType(MyKey)) Return myKeys End Get End Property End Class 'MyClientFormatterChannelSink Public Class MyKey End Class 'MyKey
public __gc class MyKey
{
};
private __gc class MyClientFormatterChannelSink :
public BaseChannelSinkWithProperties, public IClientChannelSink, public IMessageSink
{
private:
IClientChannelSink* nextClientSink;
IMessageSink* nextMessageSink;
public:
MyClientFormatterChannelSink() : nextClientSink(0), nextMessageSink(0) {}
MyClientFormatterChannelSink(IClientChannelSink* nextSink,
IMessageSink* nextMsgSink) : BaseChannelSinkWithProperties()
{
nextClientSink = nextSink;
nextMessageSink = nextMsgSink;
}
void ProcessMessage(IMessage* msg,
ITransportHeaders* requestHeaders, Stream* requestStream,
[Out]ITransportHeaders** responseHeaders, [Out]Stream** responseStream)
{
nextClientSink->ProcessMessage(msg, requestHeaders, requestStream,
responseHeaders, responseStream);
}
void AsyncProcessRequest(IClientChannelSinkStack* sinkStack,
IMessage* msg, ITransportHeaders* headers, Stream* myStream)
{
sinkStack->Push(this, 0);
nextClientSink->AsyncProcessRequest(sinkStack,msg,headers,myStream);
}
void AsyncProcessResponse(IClientResponseChannelSinkStack* sinkStack,
Object* /*state*/, ITransportHeaders* headers, Stream* myStream)
{
sinkStack->AsyncProcessResponse(headers, myStream);
}
Stream* GetRequestStream(IMessage* /*msg*/,ITransportHeaders* /*headers*/)
{
return 0;
}
__property IClientChannelSink* get_NextChannelSink()
{
return nextClientSink;
}
__property IMessageSink* get_NextSink()
{
return nextMessageSink;
}
IMessageCtrl* AsyncProcessMessage(IMessage* /*msg*/,
IMessageSink* /*replySink*/)
{
return 0;
}
IMessage* SyncProcessMessage(IMessage* msg)
{
return nextMessageSink->SyncProcessMessage(msg);
}
__property Object* get_Item( Object* key )
{
if (key == __typeof(MyKey))
return this;
return 0;
}
__property void set_Item( Object* /*value*/, Object* /*key*/ )
{
throw new NotSupportedException();
}
__property ICollection* get_Keys()
{
ArrayList* myKeys = new ArrayList(1);
myKeys->Add(__typeof(MyKey));
return myKeys;
}
};
public __gc class MyClientFormatterProvider : public IClientChannelSinkProvider
{
private:
IClientChannelSinkProvider* nextProvider;
public:
MyClientFormatterProvider() : nextProvider(0)
{
}
IClientChannelSink* CreateSink(IChannelSender* channel,
String* myUrl, Object* remoteChannelData)
{
IClientChannelSink* nextSink = 0;
IMessageSink* nextMsgSink = 0;
if (nextProvider!=0)
{
Console::WriteLine(S"Next client sink provider is: {0}", nextProvider);
// Create a sink chain calling the next sink provider's
// 'CreateSink' method.
nextSink=nextProvider->CreateSink(channel,myUrl,remoteChannelData);
nextMsgSink=dynamic_cast<IMessageSink*>(nextSink);
}
return new MyClientFormatterChannelSink(nextSink,nextMsgSink);
}
__property IClientChannelSinkProvider* get_Next()
{
return nextProvider;
}
__property void set_Next( IClientChannelSinkProvider* value )
{
nextProvider = value;
}
};
- SecurityPermission
For operating with infrastructure code. Demand value: SecurityAction.LinkDemand; Permission Value: SecurityPermissionFlag.Infrastructure
- SecurityPermission
For operating with infrastructure code. Demand value: SecurityAction.InheritanceDemand; Permission Value: SecurityPermissionFlag.Infrastructure
System.Runtime.Remoting.Channels.BaseChannelObjectWithProperties
System.Runtime.Remoting.Channels.BaseChannelSinkWithProperties
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.