lab9

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package web;

import ejb.Average;
import ejb.MeanInterface;
import ejb.RootMeanSquare;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Student
 */
@WebServlet(name = "LabServlet", urlPatterns = {"/LabServlet"})
public class LabServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet LabServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet LabServlet at " + request.getContextPath() + "</h1>");
            out.println("<h2>Lab9</h2>");
            out.println("<form method='POST'>");
            out.println("<p>a = </p><input name='a'>");
            out.println("<p>b = </p><input name='b'>");
            out.println("<input type='submit' value='Oblicz'>");
            out.println("</form>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        MeanInterface average = null;
        MeanInterface rms = null;
        try {
            InitialContext ic = new InitialContext();
            average = (Average) ic.lookup("AVG");
            rms = (RootMeanSquare) ic.lookup("RMS"); //java:global/lab9/<module>/<bean>!<interface>
        } catch (NamingException ex) {

        }

        double a = Double.parseDouble(request.getParameter("a"));
        double b = Double.parseDouble(request.getParameter("b"));

        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet LabServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet LabServlet at " + request.getContextPath() + "</h1>");
            out.println("<h2>Lab9</h2>");
            out.println("<h4>");
            if(average != null && rms != null){
            out.println("Dla a = " + a + ", b = " + b + ", AVG = " + average.Mean(a, b) + ", RMS = " + rms.Mean(a, b));
            }
            out.println("</h4>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}