br.cefetmg.radar.services.GetTransports.java Source code

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Here is the source code for br.cefetmg.radar.services.GetTransports.java

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/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package br.cefetmg.radar.services;

import br.cefetmg.radar.dao.TransportDAO;
import br.cefetmg.radar.entity.Incident;
import br.cefetmg.radar.message.Result;
import br.cefetmg.radar.util.typeadapter.HibernateProxyTypeAdapter;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
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 rafae_000
 */
@WebServlet(name = "GetTransports", urlPatterns = { "/gettransports" })
public class GetTransports 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 {
        GsonBuilder b = new GsonBuilder();

        b.registerTypeAdapterFactory(HibernateProxyTypeAdapter.FACTORY);

        Gson gson = b.create();

        response.setContentType("text/json;charset=UTF-8");
        request.setCharacterEncoding("UTF-8");

        PrintWriter out = response.getWriter();
        try {
            TransportDAO transportDAO = new TransportDAO();

            List<Incident> list = transportDAO.GetTransports();

            out.println(gson.toJson(list));

        } catch (Exception ex) {
            StringBuilder error = new StringBuilder();

            for (StackTraceElement element : ex.getStackTrace()) {
                error.append(element.toString());
                error.append("\n");
            }
            out.println(gson.toJson(new Result(Result.ERRO, error.toString())));
            response.setStatus(500);
        }

        out.close();
    }

    // <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>

}