.Net Remoting – Part4 A Custom Proxy

namespace CustProxyLib
{
public abstract class BaseRemoteObject : MarshalByRefObject
{
public abstract void setValue(int pValue);
public abstract int getValue();
public abstract string DoWork(string s);
}
}

namespace CustProxyServer
{

class CustProxyServer : BaseRemoteObject
{
int mValue;

public override void setValue(int pValue)
{
Console.WriteLine("CustProxyServer.setValue old={0} new={1}", mValue, pValue);
mValue = pValue;
}

public override int getValue()
{
Console.WriteLine("CustProxyServer.getValue val={0}", mValue);
return mValue;
}

public override string DoWork(string s)
{
Console.WriteLine("DoWork method invoked on server");
return "Remote greetings from – " + s;
}

public CustProxyServer()
{
Console.WriteLine("CustProxyServer.ctor – remote singleton created");
}

} // class CustProxyServer

class CustProxyServerStarter
{
[STAThread]
static void Main(string[] args)
{
TcpChannel chnl = new TcpChannel(1200);
ChannelServices.RegisterChannel(chnl);

RemotingConfiguration.RegisterWellKnownServiceType(
typeof(CustProxyServer), "CustProxyServer.tcp", WellKnownObjectMode.Singleton );

Console.WriteLine("CustProxyServer Remote Server On Port 1200 (using Tcp Protocol)…");
Console.WriteLine("Press <enter> to exit");
Console.ReadLine();
}
}
}
</enter>

using CustProxyLib;

namespace CustProxyClient
{
public class CustomProxy : RealProxy
{
string _url;
string _uri;
IMessageSink _sinkChain;

public CustomProxy(Type type, string url)
: base(type)
{
_url = url;
IChannel[] registeredChannels = ChannelServices.RegisteredChannels;
foreach(IChannel chnl in registeredChannels)
{
if (chnl is IChannelSender)
{
IChannelSender chnlSender = (IChannelSender) chnl;
_sinkChain = chnlSender.CreateMessageSink(_url, null, out _uri);
if (_sinkChain != null)
break;
}
} // foreach
if (_sinkChain == null)
{
throw new Exception("No channel has been found for " + _url);
}
} // ctor

public override IMessage Invoke(IMessage msg)
{
IDictionary d = msg.Properties;
d["__Uri"] = _url;

// process the request mesage here
IMessage retMsg = _sinkChain.SyncProcessMessage(msg);
// process the return message here
return retMsg;
}
} // class CustomProxy

class CustProxyClient
{
[STAThread]
static void Main(string[] args)
{
TcpChannel chnl = new TcpChannel();
ChannelServices.RegisterChannel(chnl);

CustomProxy prx = new CustomProxy(typeof(BaseRemoteObject),
"Tcp://localhost:1200/CustProxyServer.tcp");
BaseRemoteObject brObj = (BaseRemoteObject) prx.GetTransparentProxy();

brObj.setValue(411);
Console.WriteLine("Custom Proxy Remote Server: {0} value:{1}",
brObj.DoWork("Narendra"), brObj.getValue());

}
}
}