Java tutorial
package com.AlertMailerWebPage.servlet; /* * 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. */ import com.mongodb.BasicDBObject; import com.mongodb.Block; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; import com.mongodb.MongoClient; import com.mongodb.ServerAddress; import com.mongodb.client.AggregateIterable; import java.awt.List; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import static java.util.Arrays.asList; import java.util.Calendar; import java.util.HashMap; import java.util.LinkedHashMap; import java.util.Map; import java.util.Properties; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.bson.Document; import org.json.JSONArray; import org.json.JSONObject; /** * * @author prakharagarwal */ public class GetDaily extends HttpServlet { String type = null; int val = 0; int i = 0; Map<Integer, Integer> prsMap = null; Map<Integer, Integer> psmMap = null; Map<Integer, Integer> rentalMap = null; /** * 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("text/plain;charset=UTF-8"); try (PrintWriter out = response.getWriter()) { Properties defaultProps = new Properties(); InputStream in = GetProcessSpeed.class.getResourceAsStream("configuration.properties"); defaultProps.load(in); in.close(); String database = (String) defaultProps.get("database_requirementLog"); String collection = (String) defaultProps.get("collection_requirementLog"); String serverAddress = (String) defaultProps.get("IP_mbstats"); String initial = request.getParameter("initial"); //if(initial.equals("yes")) //{ prsMap = getMapper(); psmMap = getMapper(); rentalMap = getMapper(); final JSONArray counts1 = new JSONArray(); final JSONArray counts2 = new JSONArray(); final JSONArray counts3 = new JSONArray(); JSONObject counts = new JSONObject(); AggregateIterable<Document> countsPRS = getCounts(database, collection, serverAddress); countsPRS.forEach(new Block<Document>() { @Override public void apply(final Document document) { Document doc1 = (Document) document.get("_id"); int hour = (int) doc1.get("hour"); type = (String) doc1.get("type"); val = (int) document.get("count"); if (type.equalsIgnoreCase("PRS")) { prsMap.put(hour, val); } else if (type.equalsIgnoreCase("PSM")) { psmMap.put(hour, val); } else if (type.equalsIgnoreCase("RENTAL")) { rentalMap.put(hour, val); } } }); for (Map.Entry<Integer, Integer> map : prsMap.entrySet()) { counts1.put(map.getValue()); } for (Map.Entry<Integer, Integer> map : psmMap.entrySet()) { counts2.put(map.getValue()); } for (Map.Entry<Integer, Integer> map : rentalMap.entrySet()) { counts3.put(map.getValue()); } try { counts.put("countsPRS", counts1); counts.put("countsPSM", counts2); counts.put("countsRENTAL", counts3); } catch (Exception e) { } response.setContentType("text/plain"); response.setCharacterEncoding("UTF-8"); response.getWriter().write(counts.toString()); } } // } private Map<Integer, Integer> getMapper() { Calendar current = Calendar.getInstance(); int highest = current.get(Calendar.HOUR_OF_DAY); Map<Integer, Integer> map = new LinkedHashMap<Integer, Integer>(); for (int i = 0; i <= highest; i++) { map.put(i, 0); } return map; } public AggregateIterable<Document> getCounts(String database, String collection, String serverAddress) { Calendar current = Calendar.getInstance(); int currYear = current.get(Calendar.YEAR); int currMonth = current.get(Calendar.MONTH); int currDay = current.get(Calendar.DAY_OF_MONTH); currMonth = 6; currDay = 4; Calendar curr_6AM = Calendar.getInstance(); curr_6AM.set(currYear, currMonth, currDay, 0, 0, 0); curr_6AM.set(Calendar.MILLISECOND, 0); // out.println(curr_6AM.getTimeInMillis()); //MongoClient mongoClient = new MongoClient(new ServerAddress(serverAddress,27017)); MongoClient mongoClient = new MongoClient(); //MongoClient mongoClient = new MongoClient(); AggregateIterable<Document> iterable_6_9_p = mongoClient.getDatabase(database).getCollection(collection) .aggregate(asList(new Document("$match", new Document("sentDate", curr_6AM.getTimeInMillis()) //.append("alertType", alertType) .append("isMailSent", "Y") //.append("recordTime", new Document("$gte",curr_6AM.getTimeInMillis()).append("$lte", curr_9AM.getTimeInMillis())) ), new Document("$group", new Document("_id", new Document("hour", "$sentHour").append("type", "$alertType")).append("count", new Document("$sum", 1))))); //mongoClient.close(); return iterable_6_9_p; } // <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> }