mypackage.DBInformation.java Source code

Introduction

Here is the source code for mypackage.DBInformation.java

Source

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

import com.mongodb.*;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.MongoIterable;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 *
 * @author Kapil Gehlot
 */
public class DBInformation extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            try {
                String dbName = request.getParameter("dbname");
                MongoClient mongoClient = new MongoClient("localhost", 27017);
                HttpSession httpSession = request.getSession(false);
                MongoDatabase mongoDatabase = mongoClient.getDatabase(dbName);
                MongoIterable<String> mongoIterable = mongoDatabase.listCollectionNames();
                MongoCursor<String> mongoCursor = mongoIterable.iterator();
                JSONObject jSONObject = new JSONObject();
                JSONObject jSONObject1 = new JSONObject();
                JSONArray jSONArray = new JSONArray();
                int i = 0;
                while (mongoCursor.hasNext()) {
                    jSONArray.put(mongoCursor.next());
                    i++;
                }
                jSONObject.put("db", jSONArray);
                jSONObject.put("counter", i);
                out.println(jSONObject);

            } catch (JSONException e) {

            }

        }
    }

    // <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>

}