GetGroupChatServ.java Source code

Introduction

Here is the source code for GetGroupChatServ.java

Source

/*
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 * and open the template in the editor.
 */

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import model.AgentDetail;
import model.ChatMsg;
import model.GroupDetail;
import model.StateMaster;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;
import util.NewHibernateUtil;

/**
 *
 * @author rushin
 */
public class GetGroupChatServ 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 {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        try {

            SessionFactory sf = NewHibernateUtil.getSessionFactory();
            Session ss = sf.openSession();
            Transaction tr = ss.beginTransaction();

            int gid = Integer.parseInt(request.getParameter("gid"));

            GroupDetail gd = (GroupDetail) ss.get(GroupDetail.class, gid);

            System.out.println("Group id is :" + gd.getGId());

            Criteria cr = ss.createCriteria(ChatMsg.class);
            cr.add(Restrictions.eq("gId", gd));
            cr.addOrder(Order.desc("cmid"));
            cr.setMaxResults(25);
            ArrayList<ChatMsg> cm = (ArrayList<ChatMsg>) cr.list();
            Collections.reverse(cm);

            System.out.println("size of the msg array :" + cm.size());
            request.setAttribute("msgs", cm);
            request.setAttribute("gobj", gd);

            RequestDispatcher rd = request.getRequestDispatcher("groupchat.jsp");
            rd.forward(request, response);

        } catch (HibernateException he) {
            System.out.print(he.getMessage());
        }
    }

    // <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 {
        processRequest(request, response);
    }

    /**
     * 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 {
        processRequest(request, response);
    }

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

}