Develop a middleware component for retrieving Stock Market Exchange information

[vinayakakhil]

Develop a middleware component for retrieving Stock Market Exchange information using CORBA

Code:

Stock Market.idl
module SimpleStocks{
interface StockMarket
{
  float get_price(in string symbol);
};
};

StockMarketClient.java
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import SimpleStocks.*;

public class StockMarketClient
{

  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("Price of My company is"+market.get_price("My_COMPANY"));
}
catch(Exception e){
e.printStackTrace();
}
}
}
StockMarketImpl
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();}
}
StockMarketServer

import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import SimpleStocks.*;

public class StockMarketServer
{

  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();
}
}
}

EXECUTION STEPS
1.cREATE A INTERFACE(idl,CPP)
2.Create IMPLEMENTATION PROGRAM
3.sERVER PROGRAM
4.Client program
5.cOMMAND
idltojava -fno-cpp interfacename.idl
javac servant
javac server
javac client
tnameserv -ORBInitialPort 900
java HelloServer in another window
cmd
java StockMarketClient