com.dardenestates.code.src.Servlets.JsonServlet.java Source code

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Here is the source code for com.dardenestates.code.src.Servlets.JsonServlet.java

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/*
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package com.dardenestates.code.src.Servlets;

import static Util.MakeDataSource.makeDataSource;
import Util.RequestObjectVariables;
import Util.RoutingEnum;
import com.dardenestates.code.src.CONTROLLER.ControllerInterface;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonPrimitive;
import com.mysql.cj.jdbc.MysqlDataSource;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.LogManager;
import java.util.logging.Logger;
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 Miltron
 */
@WebServlet(name = "JsonServlet", urlPatterns = { "/JsonServlet" })
public class JsonServlet 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("application/json");

        BufferedReader reader = request.getReader();
        List<String> message = new ArrayList();
        JsonObject jsonObject;

        if (reader.ready()) {
            JsonParser jsonParser = new JsonParser();

            try {
                jsonObject = jsonParser.parse(reader).getAsJsonObject();

            } catch (Exception e) {
                System.out.println(e.getMessage());
                System.out.println(e.getStackTrace());
                jsonObject = new JsonObject();
                jsonObject.add("Exception_Code", new JsonPrimitive("malformed request structure"));
            }

        } else {
            jsonObject = new JsonObject();
            jsonObject.add("Exception_Code", new JsonPrimitive("Empty Request"));
            System.out.println(" Empty Request ");
        }
        try (PrintWriter out = response.getWriter()) {

            out.write(jsonObject.toString());

        }

        //extract the commandkey
        String commandKey = jsonObject.get("COMMANDKEY").getAsString();
        // route the command
        RoutingEnum routingEnum = RoutingEnum.valueOf(commandKey);
        ControllerInterface command = routingEnum.getExecutable();
        String urlLocation = routingEnum.getResponseURL();

        if (command.validate(jsonObject, message, makeDataSource())) {
            MysqlDataSource dataSource = new MysqlDataSource();
            if (command.processRequest(jsonObject, message, dataSource)) {
                response.sendRedirect(urlLocation);
            }
        }

        //get the value of command
        //match it with the enum

    }

    // <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>

}