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/*
* CustomerDetails.java
*
* Created on March 17, 2008, 1:00 AM
*/
package web;
import java.io.*;
import java.net.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.Resource;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.transaction.UserTransaction;
import persistence.*;
/**
*
* @author adminuser
* @version
*/
@PersistenceContext(name = "persistence/LogicalName", unitName = "webappPU")
public class CustomerDetails extends HttpServlet {
@Resource
private UserTransaction utx;
/** Processes requests for both HTTP GET and POST methods.
* @param request servlet request
* @param response servlet response
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
// TODO output your page here
out.println("");
out.println("");
out.println("Servlet CustomerDetails");
out.println("");
out.println("");
out.println("Servlet CustomerDetails at " + request.getContextPath () + "
");
out.println("Search Customer Information
");
out.println("Pl. select from 1,2,3,4,5 as a customer number
");
String customerNr = request.getParameter("customer_nr");
if((customerNr != null) && !(customerNr.equals(""))) {
WebCustomer customer = findByID(new Integer(customerNr));
if(customer != null){
out.println("Customer's info for nr. " + customerNr + ": " + customer.getCustname());
}else{
out.println("Customer not found.");
}
}
out.println("");
out.println("");
out.println("");
out.close();
}
//
/** Handles the HTTP GET method.
* @param request servlet request
* @param response servlet response
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/** Handles the HTTP POST method.
* @param request servlet request
* @param response servlet response
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/** Returns a short description of the servlet.
*/
public String getServletInfo() {
return "Short description";
}
//
protected WebCustomer findByID(Integer customerNr) {
WebCustomer customer=null;
try {
Context ctx = (Context) new InitialContext().lookup("java:comp/env");
utx.begin();
EntityManager em = (EntityManager) ctx.lookup("persistence/LogicalName");
customer = em.find(WebCustomer.class, customerNr);
utx.commit();
// TODO:
// em.persist(object); utx.commit();
} catch(Exception e) {
Logger.getLogger(getClass().getName()).log(Level.SEVERE,"exception caught", e);
throw new RuntimeException(e);
}
return customer;
}
}