Using the Remoting Callbacks in .Net Applications

Using the Remoting Callbacks in .Net Applications

- 中国WEB开发者网络 (http://www.webasp.net)
-- 技术教程 (http://www.webasp.net/article/)
--- Using the Remoting Callbacks in .Net Applications (http://www.webasp.net/article/4/3986.htm)

-- 作者：未知
-- 发布日期： 2003-07-12

RemoteObjectX

This is a .Net Service - transactional and poolable object register into the COM+ catalog and config as a remoting object. There are attributes for assembly and class necessary for this object configuration in the COM+ catalog. The other change, the remote class is derived from the ServicedComponent. This is a standard stuff for the .Net Service configuration.

using RKiss.RemoteObject;    // abstract definitions

[assembly: ApplicationName("RemoteObjectX")]
[assembly: ApplicationID("026B9E80-6B07-45f0-8EBF-BD35B5D3BB77")]
[assembly: Description("Remoting COM+ test")]
[assembly: ApplicationActivation(ActivationOption.Library)]        // accepted by Beta2
[assembly: ApplicationAccessControl(Value = false, Authentication = AuthenticationOption.None)]

namespace RKiss.RemoteObjectX
{
   [Guid("B19A2AD2-31F2-4c6e-B5A6-24495670BE02")]
   [Description("Remoting Object")]
   [ObjectPooling(Enabled=true,MinPoolSize=3,MaxPoolSize=64)]
   [Transaction(TransactionOption.Required)]
   [ConstructionEnabled(Default="server=ATZ-ROMAN;uid=sa;pwd=;database=Logger")]
   [EventTrackingEnabled]
   public class RmObjectX : ServicedComponent, IRmObject
   {
    ...
   }
}

Note that object has to run in the COM+ library only, that's the limitation of the Beta2 and it will be fix it in the RTM version.

RemoteObjectWS

This is a Web Service object generated by wizard and modify for the remoting purpose. The following code snippet shows its boilerplate:

using RKiss.RemoteObject;    // abstract definitions

namespace RemoteObjectWS
{
   public class RmObjectWS : MarshalByRefObject, IRmObject
   {
      public RmObjectWS()
      {
        ...
      }

      #region Component Designer generated code
        ...
      #endregion

      [WebMethod]
      public string Echo(string msg)
      {
        ...
      }
      // stateless callbacks
      [WebMethod]
      public string GiveMeCallback(int timeinsec, string ticketId, object objwire)
      {
        ...
      }
   }
}

Note that this project has to be unzip and move it into the localhost\RemoteObjectWS directory in prior of opening the solution.

HostServer
This is a server program to host a remote object. It's a very simply console program to perform a configuration of the remote object(s). There are two kinds of options for this configuration as I mentioned earlier. The option 1 is commented.

namespace RKiss.ServerActivation
{
   public class Server
   {
     public static int Main(string [] args)
     {
        try
        {
           /* option 1
           TcpChannel chan = new TcpChannel(12345);
           ChannelServices.RegisterChannel(chan);

           RemotingConfiguration.RegisterWellKnownServiceType(
                        Type.GetType("RKiss.RemoteObjectA.RmObjectA, RemoteObjectA"),
                        @"RemoteTest/ObjectA",
                        WellKnownObjectMode.SingleCall);

           RemotingConfiguration.RegisterWellKnownServiceType(
                        Type.GetType("RKiss.RemoteObjectX.RmObjectX, RemoteObjectX"),
                        @"RemoteTest/ObjectX",
                        WellKnownObjectMode.Singleton);

           */
           // option 2
           RemotingConfiguration.Configure(@"..\..\HostServer.exe.config");
           }
           catch(Exception ex)
           {
             System.Console.WriteLine(ex.Message);
           }

        System.Console.WriteLine("Hit <enter> to exit...");
        System.Console.ReadLine();
        return 0;
     }
   }
}

webasp.net