Stock Market Using Corba

To write a program to develop a middle-ware component for retrieving Stock Market Exchange information using CORBA.

• Creating a module which contains a set of interface program and save it as a SimpleStocks.idl makes sure that module and interface name is different.
• Next declare the implementation file with ImplBase concept & contains details about stock maintenance.
• Create a server program  that initialize the ORB name the server object & bind the server object with the implementation file now server is ready.
• Create a client program by initialize the ORB. Make sure the name of server object and client object declared resembles the frame.
• Then provide the input to the client program and obtain the suitable output corresponding to it.

Compile & Execution Steps:

• idlj -fall -oldImplBase SimpleStocks.idl
• javac StockMarketImpl.java SimpleStocks\*.java
• javac StockMarket server.java SimpleStocks\*.java
• javac StockMarket client.java SimpleStocks\*.java
• start orbd -ORBInitialPort 1050
• start java StockMarket Server -ORBInitialPort 1050
• java StockMarket client -ORBInitialPort 1050 50.

Source code

Simplestock.idl

// Comment
module Simplestock
{
interface stockmarket
{
float get_price(in string symbol);
};
};

stockmarketimpl.java

// Comment
import org.omg.CORBA.*;
import simplestocks.*;
public class stockmarketimpl extends _stockmarketImplBase
{
 public float get_price(String symbol)
  {
  float price=0;
  for(int i=0;i<symbol.length();i++)
  {
   price+=(int)symbol.charAt(i);
  }
   price/=5;
   return price;
  }
   public stockmarketimpl()
  {
   super();
  }
 }

Stockmarketserv.java

// Comment
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import simplestocks.*;
public class stockmarketserv
{
 public static void main(String args[])
 {
  try
  {
     ORB orb=ORB.init(args,null);
     stockmarketimpl stockmarketimpl=new stockmarketimpl();
     orb.connect(stockmarketimpl);
     org.omg.CORBA.Object objRef=orb.resolve_initial_references("NameService");
     NamingContext ncRef=NamingContextHelper.narrow(objRef);
     NameComponent nc=new NameComponent("NASDAQ"," ");
     NameComponent path[]={nc};
     ncRef.rebind(path,stockmarketimpl);
     System.out.println("Stockmarket server is ready");
     Thread.currentThread().join();
    }
    catch(Exception e)
    {
     e.printStackTrace();
    }
   }
  }

stockmarketcli.java

// Comment
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import simplestocks.*;
public class stockmarketcli
{
 public static void main(String args[])
 {
  try
  {
   ORB orb=ORB.init(args,null);
   NamingContext ncRef=NamingContextHelper.narrow(orb.resolve_initial_references("NameService"));
   NameComponent path[]={new NameComponent("NASDAQ"," ")};
   stockmarket market=stockmarketHelper.narrow(ncRef.resolve(path));
   System.out.println("Rate of the company is"+market.get_price(args[2]));
   }
   catch(Exception e)
   {
    e.printStackTrace();
    }
   }
  }

Output Screen