The document describes a stock market application created using CORBA. It defines stock interfaces and data types in an IDL file. It implements the server using a POA and registers it with the naming service. The client connects to the server object, allows registration of companies and customers, and has options to buy/sell shares or view details. The code provides an example of building a distributed stock trading application using CORBA.

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EX NO :6 DATE : 27-8-2014
STOCK APPLICATION USING CORBA
NAME : M.F.JERINCE RAJA ROLLNO : 12LMC004
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STOCK.IDL
*********
module stck_market
{
interface stock
{
const unsigned short SIZE = 20;
typedef string name[SIZE];
typedef short id[6];
typedef short amount[10];
typedef long shares[SIZE];
typedef string addr[SIZE];
long buyshare(in long amt,in long share);
long sellshare(in long amt,in long share);
};
};
STOCKIMPL
**********
import stck_market.*;
import org.omg.CORBA.*;
class stckimpl extends stockPOA
{
private ORB orb;
public stckimpl(ORB orb)
{
this.orb = orb;
}
public int buyshare(int amt,int share)
{
return(amt*share);
}
public int sellshare(int amt,int share)
{
return(amt*share);
}
}
SERVER
******
import stck_market.*;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import org.omg.PortableServer.*;
import org.omg.PortableServer.POA;
import org.omg.CosNaming.NamingContextPackage.*;
public class server
{
public static void main(String args[])

2. {
try
{
ORB orb = ORB.init(args, null);
stckimpl imp_obj = new stckimpl(orb);
POA rootpoa =
POAHelper.narrow(orb.resolve_initial_references("RootPOA"));
rootpoa.the_POAManager().activate();
org.omg.CORBA.Object ref =
rootpoa.servant_to_reference(imp_obj);
stock href = stockHelper.narrow(ref);
org.omg.CORBA.Object objRef =
orb.resolve_initial_references("NameService");
NamingContextExt ncRef =
NamingContextExtHelper.narrow(objRef);
String name = "stock";
NameComponent path[] = ncRef.to_name( name );
ncRef.rebind(path, href);
System.out.println(" Server ready... ");
orb.run();
}
catch (Exception e)
{
System.err.println("ERROR: " + e);
e.printStackTrace(System.out);
}
System.out.println("Server Exiting ....");
}
}
CLIENT
*******
import stck_market.*;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import java.io.*;
public class client
{
public static void main(String args[])
{
try
{
int cmid = 0, csid = 0, repeat = 1,n;
int comp_id[] = new int[6];
String comp_name[] = new String[stck_market.stock.SIZE];
int shr[] = new int[stck_market.stock.SIZE];
int shr_pri[] = new int[stck_market.stock.SIZE];
String comp_addr[] = new String[stck_market.stock.SIZE];
int amt[] = new int[stck_market.stock.SIZE];

3. int cust_id[] = new int[6];
String cust_name[] = new String[stck_market.stock.SIZE];
int cust_shr[] = new int[stck_market.stock.SIZE];
String cust_addr[] = new String[stck_market.stock.SIZE];
int cust_amt[] = new int[stck_market.stock.SIZE];
int ctshr_pri[] = new int[stck_market.stock.SIZE];
BufferedReader br = new BufferedReader(new
InputStreamReader(System.in));
ORB orb = ORB.init(args, null);
org.omg.CORBA.Object objRef =
orb.resolve_initial_references("NameService");
NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
String name = "stock";
stock obj = stockHelper.narrow(ncRef.resolve_str(name));
System.out.println("Handle obtained on server object: "+obj);
System.out.println(" CORBA APPLICATION FOR STOCK MARKET ");
System.out.println(" ~~~~~ ~~~~~~~~~~~ ~~~ ~~~~~ ~~~~~~ ");
System.out.println(" Enter the number of company & customer to be
registered : ");
n = Integer.parseInt(br.readLine());
for(int i=0;i<n;i++)
{
System.out.println("tt Company Registration ");
System.out.println(" Enter the company ID : ");
comp_id[i] = Integer.parseInt(br.readLine());
System.out.println(" Enter the company name : ");
comp_name[i] = br.readLine();
System.out.println(" Enter the company address : ");
comp_addr[i] = br.readLine();
System.out.println(" Enter the company shares : ");
shr[i] = Integer.parseInt(br.readLine());
System.out.println(" Enter the unit prize of shares : ");
shr_pri[i] = Integer.parseInt(br.readLine());
System.out.println(" Enter the total amount of shares owned :
");
amt[i] = Integer.parseInt(br.readLine());
System.out.println("tt Customer Registration ");
System.out.println(" Enter the customer ID : ");
cust_id[i] = Integer.parseInt(br.readLine());
System.out.println(" Enter the customer name : ");
cust_name[i] = br.readLine();
System.out.println(" Enter the customer address : ");
cust_addr[i] = br.readLine();
System.out.println(" Enter the number of shares owned : ");
cust_shr[i] = Integer.parseInt(br.readLine());
System.out.println(" Enter the unit prize of shares : ");
ctshr_pri[i] = Integer.parseInt(br.readLine());
System.out.println(" Enter the total amount of shares owned :
");
cust_amt[i] = Integer.parseInt(br.readLine());
}
do
{
System.out.println(" 1 - > BUY SHARES 2 - > SELL SHARES 3 - > LIST
THE DETAILS ");
System.out.println(" Enter the choice : ");
int ch = Integer.parseInt(br.readLine());
switch(ch)
{
case 1:
System.out.println("t BUY SHARES ");
System.out.println(" Enter the company ID : ");
cmid = Integer.parseInt(br.readLine());

4. System.out.println(" Enter the customer ID : ");
csid = Integer.parseInt(br.readLine());
for(int i=0;i<n;i++)
{
if(cmid==comp_id[i] && csid==cust_id[i])
{
System.out.println(" Enter the number of shares to buy : ");
int share = Integer.parseInt(br.readLine());
int unit_price = shr_pri[i];
int cur_amt = obj.buyshare(unit_price,share);
System.out.println(" Shares bought : "+share);
System.out.println(" Total amount : "+cur_amt);
shr[i] = shr[i] - share;
amt[i] = amt[i] - cur_amt;
cust_shr[i] = cust_shr[i] + share;
cust_amt[i] = cust_amt[i] + cur_amt;
break;
}}
break;
case 2:
System.out.println("t SELL SHARES ");
System.out.println(" Enter the company ID : ");
cmid = Integer.parseInt(br.readLine());
System.out.println(" Enter the customer ID : ");
csid = Integer.parseInt(br.readLine());
for(int i=0;i<n;i++)
{
if(cmid==comp_id[i] && csid==cust_id[i])
{
System.out.println(" Enter the number of shares to sell : ");
int share = Integer.parseInt(br.readLine());
int unit_price = ctshr_pri[i];
int cur_amt = obj.sellshare(unit_price,share);
System.out.println(" Shares sold : "+share);
System.out.println(" Total amount : "+cur_amt);
shr[i] = shr[i] + share;
amt[i] = amt[i] + cur_amt;
cust_shr[i] = cust_shr[i] - share;
cust_amt[i] = cust_amt[i] - cur_amt;
break;
}
}
break;
case 3:
for(int i=0;i<n;i++)
{
System.out.println("ttt Company Details ");
System.out.println("t Company ID : "+comp_id[i]);
System.out.println("t Company name : "+comp_name[i]);
System.out.println("t Company Shares : "+shr[i]);
System.out.println("t Total Amount of Shares Owned : "+amt[i]);
System.out.println("ttt Customer Details ");
System.out.println("t Customer ID : "+cust_id[i]);
System.out.println("t Customer Name : "+cust_name[i]);
System.out.println("t Total Number of Shares Owned : "+cust_shr[i]);
System.out.println("t Total Amount of Shares Owned : "+cust_amt[i]);

5. }
break;
}
System.out.println(" Press 1 to continue... ");
repeat = Integer.parseInt(br.readLine());
}while(repeat==1);
}
catch (Exception e1)
{
System.out.println("ERROR : " + e1) ;
e1.printStackTrace(System.out);
}
}
}
OUTPUT
******
Z:st>idlj -fall stock.idl
Z:st>javac *.java
Note: .stck_marketstockPOA.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Z:st>javac *.java stck_market/*.java
Note: stck_marketstockPOA.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Z:st>orbd -ORBInitialPort 2500
Z:st>java server -ORBInitialPort 2500
Server ready...
CORBA APPLICATION FOR STOCK MARKET
~~~~~ ~~~~~~~~~~~ ~~~ ~~~~~ ~~~~~~
Enter the number of company & customer to be registered :
1
Company Registration
Enter the company ID :
1234
Enter the company name :
cicso
Enter the company address :
northstreet
Enter the company shares :
100
Enter the unit priCe of shares :
50
Enter the total amount of shares owned :
80
Customer Registration
Enter the customer ID :
101
Enter the customer name :
RAJA
Enter the customer address :
M.G,.R nagar
Enter the number of shares owned :
40
Enter the unit prize of shares :

6. 40
Enter the total amount of shares owned :
10
1 - > BUY SHARES 2 - > SELL SHARES 3 - > LIST THE DETAILS
Enter the choice :
1
BUY SHARES
Enter the company ID :
1234
Enter the customer ID :
101
Enter the number of shares to buy :
15
Shares bought : 15
Total amount : 750
Press 1 to continue...

7. 40
Enter the total amount of shares owned :
10
1 - > BUY SHARES 2 - > SELL SHARES 3 - > LIST THE DETAILS
Enter the choice :
1
BUY SHARES
Enter the company ID :
1234
Enter the customer ID :
101
Enter the number of shares to buy :
15
Shares bought : 15
Total amount : 750
Press 1 to continue...