JAVA CODE FOR CORBA

INTERFACE:

module HelloApp

{

    interface Hello

{

    string sayHello();

    oneway void shutdown();

       };

   };

PROGRAM: (SERVER)

import HelloApp.*;

import org.omg.CosNaming.*;

import org.omg.CosNaming.NamingContextPackage.*;

import org.omg.CORBA.*;

import org.omg.PortableServer.*;

import org.omg.PortableServer.POA;

import java.util.Properties;

class HelloImpl extends HelloPOA

 {

    private ORB orb;

     public void setORB(ORB orb_val)

        {

         orb = orb_val;

        }

   

      public String sayHello()

         {

           return "\nHello world !!\n";

          }

   

       public void shutdown()

        {

           orb.shutdown(false);

         }

     }

       public class HelloServer

       {

           public static void main(String args[])

{

            try

            {

      

             ORB orb = ORB.init(args, null);

             POA rootpoa = POAHelper.narrow(orb.resolve_initial_references("RootPOA"));

              rootpoa.the_POAManager().activate();

             HelloImpl helloImpl = new HelloImpl();

             helloImpl.setORB(orb);

             org.omg.CORBA.Object ref = rootpoa.servant_to_reference(helloImpl);

             Hello href = HelloHelper.narrow(ref);

             org.omg.CORBA.Object objRef =

             orb.resolve_initial_references("NameService");

             NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);

             String name = "Hello";

 NameComponent path[] = ncRef.to_name( name );

              ncRef.rebind(path, href);

             System.out.println("HelloServer ready and waiting ...");

             orb.run();

  }  

           

    catch (Exception e)

            {

            System.err.println("ERROR: " + e);

            e.printStackTrace(System.out);

            }

System.out.println("HelloServer Exiting ...");

           

      }

}

PROGRAM: (CLIENT)

import HelloApp.*;

import org.omg.CosNaming.*;

import org.omg.CosNaming.NamingContextPackage.*;

import org.omg.CORBA.*;

public class HelloClient

{

   static Hello helloImpl;

   public static void main(String args[])

    {

      try

      {

               ORB orb = ORB.init(args, null);

                org.omg.CORBA.Object objRef =

                orb.resolve_initial_references("NameService");

                NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);

       

              String name = "Hello";

              helloImpl = HelloHelper.narrow(ncRef.resolve_str(name));

             System.out.println("Obtained a handle on server object: " + helloImpl);

             System.out.println(helloImpl.sayHello());

             helloImpl.shutdown();

            }

             catch (Exception e)

            {

              System.out.println("ERROR : " + e) ;

              e.printStackTrace(System.out);

              }

        }

 } 

OUTPUT:

SERVER:                                                                     CLIENT:

Obtained a handle on server sobject:Hello

Hello World!!

HelloServer Exiting ...