// Purpose. Servlet
package article.servlet;
import java.util.*;
import java.io.*;
import javax.rmi.*; // PortableRemoteObject
import javax.naming.*; // InitialContext
import javax.servlet.*;
import javax.servlet.http.*;
public class StoreClientServlet extends javax.servlet.http.HttpServlet {
private RIStore theStore;
private ArrayList theItems;
public void init( ServletConfig sc ) {
try {
super.init( sc );
InitialContext ic = new InitialContext();
Object obj = ic.lookup( "StoreServer" );
theStore = (RIStore) PortableRemoteObject.narrow( obj, RIStore.class );
theItems = theStore.getItems();
} catch (ServletException ex) { ex.printStackTrace();
} catch (NamingException ex ) { ex.printStackTrace();
} catch (java.rmi.RemoteException ex ) { ex.printStackTrace();
} }
public void doGet( HttpServletRequest req, HttpServletResponse resp )
throws ServletException, IOException {
PrintWriter pw = resp.getWriter();
pw.println( "StoreClientServlet" );
HttpSession session = req.getSession();
// get the array of choices stored in the session object
ArrayList theChoices = (ArrayList) session.getAttribute( "theChoices" );
// get the text input element named "choice"
String choice = req.getParameter( "choice" );
// if this is the first request for this page
if (theChoices == null) {
theChoices = new ArrayList();
session.setAttribute( "theChoices", theChoices );
// remember the current selection
} else if ( ! choice.equals("0")) {
theChoices.add( new Integer( Integer.parseInt(choice) - 1 ) );
session.setAttribute( "theChoices", theChoices );
// time to place the order
} else {
StringBuffer response =
new StringBuffer( theStore.placeOrder( theChoices ) );
formatOrderConfirmation( response );
pw.println( response.toString() );
pw.println( "Top" );
session.invalidate();
return;
}
// always output the base form
pw.println( "
" );
}
private void formatOrderConfirmation( StringBuffer response ) {
for (int i=0; i < response.length()-4; i++)
if (response.charAt(i) == '\n') {
response.deleteCharAt(i);
response.insert( i, "