[Mono-list] Bi-directional remoting

[Steve Mentzer]

... which is also why this won't work when the client is behind a =
firewall or nat'ing device.

because of this little detail, it renders the technology almost useless. =
:)


-----Original Message-----
From: Lluis Sanchez [mailto:lluis@ideary.com]
Sent: Friday, February 21, 2003 12:30 PM
To: Bawcom, Aaron; Urs Muff; mono-list@lists.ximian.com
Subject: Re: [Mono-list] Bi-directional remoting


Correct. The client TcpChannel starts a listener using any free port. =
This
port info is added to the object reference sent to the server. When the
server calls a method of that object, it creates a new direct connection =
to
the client.

----- Original Message -----
From: "Bawcom, Aaron" <aaron_bawcom@intrusion.com>
To: "'Lluis Sanchez'" <lluis@ideary.com>; "Urs Muff" <umuff@quark.com>;
<mono-list@lists.ximian.com>
Sent: Friday, February 21, 2003 9:14 PM
Subject: RE: [Mono-list] Bi-directional remoting


> This creates an entirely new TCP connection right? It doesn't use the
> existing TCP session already in place correct?
>
> -----Original Message-----
> From: Lluis Sanchez [mailto:lluis@ideary.com]
> Sent: Friday, February 21, 2003 12:51 PM
> To: Urs Muff; mono-list@lists.ximian.com
> Subject: Re: [Mono-list] Bi-directional remoting
>
>
> Bi-directional remotingHi,
>
> In the client configuration file change <channel ref=3D"tcp"> to =
<channel
> ref=3D"tcp" port=3D"0">. This will create a tcp listener in the client
(however,
> in mono configuration files don't work yet).
>
> Lluis.
>
> ----- Original Message -----
> From: Urs Muff
> To: 'mono-list@lists.ximian.com'
> Sent: Friday, February 21, 2003 7:26 PM
> Subject: [Mono-list] Bi-directional remoting
>
>
> How would you create such a bi-directional channel?  All the samples I
used
> so far are only server-client, but not the other way around. I have a
> delegate that I want to implement on the client side.  The class
> implementing the callback sits on the client (of course). I even use =
the
> common abstract pattern described by a Microsoft KB article, but still =
no
> luck. Debug output: ASP.Net Server starting Server.Do start An =
unhandled
> exception of type 'System.Runtime.Remoting.RemotingException'
> occurred in mscorlib.dll
> Additional information: This remoting proxy has no channel sink which
means
> either the server has no registered server channels that are =
listening, or
> this application has no suitable client channel to talk to the server.
>
>
> Here is the sample code:
>
>
> CommonLib: [both server and client have access]
> -----------------------------------------------
> using System;
> using System.Runtime.Remoting;
> public delegate void BaseEventHandler(object sender,RemoteEventArgs =
e);
> [Serializable] public class RemoteEventArgs : EventArgs {
>         public static new RemoteEventArgs Empty =3D new =
RemoteEventArgs(); }
> public abstract class RemoteCallback : MarshalByRefObject {
>         [System.Runtime.Remoting.Messaging.OneWay]
>         public void Callback(object sender,RemoteEventArgs e)
>         {
>                 CallbackImpl(sender,e);
>         }
>         protected abstract void CallbackImpl(object =
sender,RemoteEventArgs
> e); } public interface IServer {
>         event BaseEventHandler Evt;
>         void Do();
> }
>
>
> ASP.Net Server:
> --------------------------------------------
> class S : MarshalByRefObject, IServer
> {
>         public event BaseEventHandler Evt;
>         public void Do()
>         {
>                 System.Diagnostics.Debug.WriteLine("Server.Do start");
>                 if (Evt !=3D null) Evt(this,RemoteEventArgs.Empty);
>                 System.Diagnostics.Debug.WriteLine("Server.Do end");
>         }
> }
> public class Service1 : System.Web.Services.WebService
> {
>         ... // standard web service stuff (autogenerated)
>         static bool Init =3D false;
>         [WebMethod]
>         public void StartUp()
>         {
>                 if (!Init)
>                 {
>                         =
RemotingConfiguration.Configure("/Server.config");
>                         Init =3D true;
>                 }
>                 System.Diagnostics.Debug.WriteLine("ASP.Net Server
> starting");
>         }
> }
> <configuration>
>   <system.runtime.remoting>
>     <application>
>       <service>
>         <wellknown
>            mode=3D"Singleton"
>            type=3D"S, Server"
>            objectUri=3D"S"
>         />
>       </service>
>       <channels>
>         <channel ref=3D"tcp" port=3D"8085">
>           <serverProviders>
>                 <formatter ref=3D"binary"/>
>           </serverProviders>
>         </channel>
>       </channels>
>     </application>
>   </system.runtime.remoting>
> </configuration>
> Client:
> --------------------------------------------
> using System;
> using System.Runtime.Remoting;
> public class Test
> {
>         static void Main()
>         {
>                 =
RemotingConfiguration.Configure("../../Client.config");
>
>                 new Client.localhost.Service1().StartUp();
>                 IServer s =3D
> Activator.GetObject(typeof(IServer),"tcp://localhost:8085/S") as =
IServer;
>                 s.Evt +=3D new BaseEventHandler(
>                         new ClientChangedCallback().Callback);
>                 s.Do();
>                 System.Diagnostics.Debug.WriteLine("I never get =
here");
>         }
> }
> public class ClientChangedCallback : RemoteCallback
> {
>         protected override void CallbackImpl(object =
sender,RemoteEventArgs
> e)
>         {
>                 System.Diagnostics.Debug.WriteLine("And of course I =
never
> get here");
>         }
> }
> <configuration>
>   <system.runtime.remoting>
>      <application>
>         <channels>
>            <channel ref=3D"tcp">
>               <clientProviders>
>                  <formatter ref=3D"binary"/>
>               </clientProviders>
>            </channel>
>         </channels>
>      </application>
>   </system.runtime.remoting>
> </configuration>
>
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