DS Experiment No 8

Aim- To write a program to print “Hello World” in CORBA.

Hello.idl

module HelloApp{

 interface Hello  {

 string sayHello();

 oneway void shutdown();

 };

};

HelloServer.java

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);

     HelloPOATie tie = new HelloPOATie(helloImpl, rootpoa);

     Hello href = tie._this(orb);

     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 ..."); }}

HelloClient.java

import HelloApp.*;

import org.omg.CosNaming.*;

import org.omg.CosNaming.NamingContextPackage.*;

import org.omg.CORBA.*;

public class HelloClient{

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";

     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:

Microsoft Windows [Version 6.1.7601]

Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Windows\system32>cd\

C:\>cd C:\jdk1.8.0_111\bin

C:\jdk1.8.0_111\bin>java HelloClient -ORBInitialPort 1050 -ORBInitialHost localh

ost

Obtained a handle on server object: IOR:000000000000001749444c3a48656c6c6f417070

2f48656c6c6f3a312e300000000000010000000000000086000102000000000b31302e312e37352e

35330000c0e1000000000031afabcb0000000020a778de0900000001000000000000000100000008

526f6f74504f41000000000800000001000000001400000000000002000000010000002000000000

0001000100000002050100010001002000010109000000010001010000000026000000020002

Hello world !!

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