com.impala.servlet.Balance.java Source code

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Here is the source code for com.impala.servlet.Balance.java

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package com.impala.servlet;

/**
 *
 * @author mulikevs
 */
//public class  {

import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import com.impala.balance.AMBalance;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.annotation.WebServlet;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * @author mulikevs
 *
 */
@WebServlet(name = "Balance", urlPatterns = { "/Balance" })
public class Balance extends HttpServlet {

    AMBalance airtelbalance = new AMBalance();
    //private Payment2 remittoairtel;

    private String statuscode = "00032";

    private String Statusdescription = "INTERNAL_SERVER_ERROR";

    private String CLIENT_URL = "";

    /**
     * 
     * @param config
     * @throws ServletException
     */
    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);

    }

    /**
     * 
     * @param request
     * @param response
     * @throws ServletException
     *             , IOException
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        OutputStream out = response.getOutputStream();

        response.setContentType("text/plain;charset=UTF-8");
        response.setDateHeader("Expires", new Date().getTime()); // Expiration
        // date
        response.setDateHeader("Date", new Date().getTime()); // Date and time
        try {
            // that the
            // message was
            // sent
            out.write(moneytransfer(request).getBytes());
        } catch (JSONException ex) {
            Logger.getLogger(Remit.class.getName()).log(Level.SEVERE, null, ex);
        }
        out.flush();
        out.close();
    }

    /**
     * 
     * @param request
     * @return
     * @throws IOException
     */
    private String moneytransfer(HttpServletRequest request) throws IOException, JSONException {

        // joined json string
        String join = "";
        JsonElement root = null;
        JsonElement root2 = null;
        JsonElement root3 = null;

        String responseobject = "";

        String nickname = "KENDYIPL";

        // These represent parameters received over the network
        String referenceid = "", customermsisdn = "", amount = "", batchref = "", username = "", password = "",
                narrative = "";
        //referenceid, customermsisdn, nickname,amount, batchref, username, password, narrative

        // Get all parameters, the keys of the parameters are specified
        List<String> lines = IOUtils.readLines(request.getReader());

        // used to format/join incoming JSon string
        join = StringUtils.join(lines.toArray(), "");

        //###############################################################################
        // instantiate the JSon
        //Note
        //The = sign is encoded to \u003d. Hence you need to use disableHtmlEscaping().
        //###############################################################################

        Gson g = new GsonBuilder().disableHtmlEscaping().create();
        //Gson g = new Gson();
        Map<String, String> expected = new HashMap<>();

        try {
            // parse the JSon string
            //referenceid, customermsisdn, nickname,amount, batchref, username, password, narrative

            root = new JsonParser().parse(join);

            password = root.getAsJsonObject().get("password").getAsString();

            username = root.getAsJsonObject().get("username").getAsString();

        } catch (Exception e) {

            expected.put("command_status", "COMMANDSTATUS_INVALID_PARAMETERS");
            String jsonResult = g.toJson(expected);
            System.out.println(e);

            return jsonResult;
        }

        // check for the presence of all required parameters
        if (StringUtils.isBlank(nickname) || StringUtils.isBlank(password) || StringUtils.isBlank(username)) {

            expected.put("username", username);

            expected.put("status_code", statuscode);
            expected.put("status_description", Statusdescription);
            String jsonResult = g.toJson(expected);

            return jsonResult;
        }

        //assign the remit url from properties.config

        String processtransaction = airtelbalance.AirtelBalance(nickname, username, password);
        //capture the switch respoinse.

        System.out.println(processtransaction);

        //pass the returned json string
        JsonElement roots = new JsonParser().parse(processtransaction);

        //exctract a specific json element from the object(status_code)
        Double balance = roots.getAsJsonObject().get("CheckBalanceResult").getAsDouble();

        //add 

        expected.put("username", username);

        expected.put("balance", balance.toString());

        String jsonResult = g.toJson(expected);

        return jsonResult;

    }

    /**
     * 
     * @param request
     * @param response
     * @throws ServletException
     *             , IOException
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

}