Java tutorial
/* * 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 com.boha.rivers.gate; import com.boha.rivers.transfer.RequestDTO; import com.boha.rivers.transfer.ResponseDTO; import com.boha.rivers.util.DataUtil; import com.boha.rivers.util.PlatformUtil; import com.google.gson.Gson; import java.io.IOException; import java.io.PrintWriter; import java.math.BigDecimal; import java.util.logging.Level; import java.util.logging.Logger; import javax.ejb.EJB; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * * @author Chris */ @WebServlet(name = "PhotoServlet", urlPatterns = { "/PS" }) public class PhotoServlet extends HttpServlet { @EJB DataUtil dataUtil; @EJB PlatformUtil platformUtil; /** * 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("application/json;charset=UTF-8"); PrintWriter out = response.getWriter(); long start = System.currentTimeMillis(); ResponseDTO ur = new ResponseDTO(); String json; Gson gson = new Gson(); try { boolean isMultipart = ServletFileUpload.isMultipartContent(request); if (isMultipart) { //ur = photoUtil.downloadPhotos(request, dataUtil, platformUtil); } else { RequestDTO dto = getRequest(gson, request); switch (dto.getRequestType()) { } } } catch (Exception e) { logger.log(Level.SEVERE, "Servlet file upload FAILED, check it out!", e); ur.setStatusCode(113); ur.setMessage("Error. Generic server exception"); } finally { json = gson.toJson(ur); out.println(json); out.close(); long end = System.currentTimeMillis(); logger.log(Level.INFO, "PhotoServlet done, elapsed: {0} seconds", getElapsed(start, end)); } } public static double getElapsed(long start, long end) { BigDecimal m = new BigDecimal(end - start).divide(new BigDecimal(1000)); return m.doubleValue(); } static final Logger logger = Logger.getLogger("PhotoServlet"); // <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); } private RequestDTO getRequest(Gson gson, HttpServletRequest req) { String json = req.getParameter("JSON"); RequestDTO cr = gson.fromJson(json, RequestDTO.class); if (cr == null) { cr = new RequestDTO(); } return cr; } /** * 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> }