Multilingual App Engine App - TipsService.java

TipsService.java

package com.mindstorm.i18n.services;

import java.io.IOException;
import java.util.List;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.gson.Gson;
import com.mindstorm.i18n.dao.TipsDAO;
import com.mindstorm.i18n.entity.Tips;

public class TipsService extends HttpServlet {
        
        private static final Logger _logger = Logger.getLogger(TipsService.class.getName());

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse res)
                        throws ServletException, IOException {
                //If tipCode is provided, this is a specific row else all rows
                String tipCode = req.getParameter("tipCode");
                String tipRandom = req.getParameter("tipRandom");
                String tipLanguage = req.getParameter("tipLanguage");
                res.setCharacterEncoding("UTF-8");
                res.setContentType("text/json; charset=UTF-8");
                try {
                        if (tipCode != null && !tipCode.equals("")) {
                                if (tipRandom != null && tipRandom.equals("Y")) {
                                        String tip = TipsDAO.INSTANCE.getRandomTip(tipCode,Integer.parseInt(tipLanguage));
                                        res.getWriter().print(new Gson().toJson(tip));
                                }
                                else {
                                        Tips tip = TipsDAO.INSTANCE.getTips(tipCode);
                                        res.getWriter().print(new Gson().toJson(tip));
                                }
                        }
                        else {
                                List<Tips> tips = TipsDAO.INSTANCE.getTips();
                                res.getWriter().print("{\"results\":" +new Gson().toJson(tips)+"}");
                        }
                } catch (Exception e) {
                        _logger.info(e.getMessage());
                        res.getWriter().println("{status:\"failed\"}");
                }
        }
}