makeorderservlet.java

java web services how to program

// MakeOrderServlet.java
// Retrieves user-input to invoke the Book Purchase Web service 
// of the specified Book Store.
package jws1casestudy.clients.web;

// Java core packages
import java.io.*;
import java.util.*;

// Java extension packages
import javax.servlet.*;
import javax.servlet.http.*;
import javax.xml.rpc.*;

// Deitel packages
import jws1casestudy.clients.stubs.bookpurchase.*;

public class MakeOrderServlet extends HttpServlet {
   
   private ServletContext servletContext;

   // obtain servlet context
   public void init( ServletConfig servletConfig )
      throws ServletException
   {
      servletContext = servletConfig.getServletContext();
   }

   // invoke Web service Book Purchase with user input
   protected void doPost( HttpServletRequest request,
      HttpServletResponse response )
      throws ServletException, IOException
   {

      // obtain session if exists
      HttpSession session = request.getSession( false );
      
      // if session does not exist, forward to start page
      if ( session == null ) {
         RequestDispatcher dispatcher =
            servletContext.getRequestDispatcher( 
               "/FindBook.html" );
         
         dispatcher.forward( null, null );
      }
      
      // obtain user input
      String firstName = request.getParameter( "firstname" );
      String lastName = request.getParameter( "lastname" );
      String email = request.getParameter( "email" );
      String streetAddress = 
         request.getParameter( "streetaddress" );

      String city = request.getParameter( "city" );
      String state = request.getParameter( "state" );
      String zip = request.getParameter( "zip" );
      String country = request.getParameter( "country" );
      String creditCard = request.getParameter( "creditcard" );
      
      // instantiate Customer instance
      Customer customer = new Customer();

      customer.setFirstName( firstName );
      customer.setLastName( lastName );
      customer.setEmailAddress( email );
      customer.setStreetAddress( streetAddress);
      customer.setCity( city );
      customer.setState( state );
      customer.setZipCode( zip );
      customer.setCountry( country );
      customer.setCreditCardNumber( creditCard );

      // obtain price quote contents from session
      String price = 
         ( String )session.getAttribute( "price" );
      
      String isbn = 
         ( String )session.getAttribute( "isbn" );
      
      String storeID = 
         ( String )session.getAttribute( "storeID" );
      
      String storeDescription = 
         ( String )session.getAttribute( "storeDescription" );

      // create PriceQuote from contents in session
      PriceQuote priceQuote = new PriceQuote();
      
      priceQuote.setIsbn( isbn );
      priceQuote.setPrice( Double.parseDouble( price ) );
      priceQuote.setStoreID( Integer.parseInt( storeID ) );
      priceQuote.setStoreDescription( storeDescription );
     
      // attempt to place order
      try {

         // create Web service stub factory
         BookPurchaseService bookPurchaseService =
            new BookPurchaseService_Impl();
         
         // obtain reference to Web service stub
         BookPurchase bookPurchase = 
            bookPurchaseService.getBookPurchase();
         
         // place order
         bookPurchase.orderBook( priceQuote, customer );
      }

      // handle Web service exceptions
      catch ( Exception exception ) {
         exception.printStackTrace();
      }

      // store customer information in session
      session.setAttribute( "firstName", firstName );
      session.setAttribute( "lastName", lastName );
      session.setAttribute( "email", email );
      session.setAttribute( "streetAddress", streetAddress );
      session.setAttribute( "city", city );
      session.setAttribute( "state", state );
      session.setAttribute( "zip", zip );
      session.setAttribute( "country", country );
      session.setAttribute( "creditCard", creditCard );
      
      // dispatch to order confirmation jsp
      RequestDispatcher dispatcher = 
         servletContext.getRequestDispatcher( 
            "/OrderConfirmation.jsp" );
      
      dispatcher.forward( request, response );
      
   } // end method doPost
   
} // end class MakeOrderServlet