old_contents: 'use strict';
  
  var mongoose = require('mongoose');
  var express = require('express');
  var config = require('config');
  var model = require('./model');
  var jade = require('./jade');
  
  var app = express();
  
  /**
   * Connect to database.
   */
  // Connect to mongodb
  var db = config.get('db.host') + "/" + config.get('db.name');
  mongoose.connect("mongodb://" + db, {
      server: {
          socketOptions: {
              keepAlive: 1
          }
      }
  });
  
  process.on('SIGINT', function () {
      console.warn('Express exit');
      if (mongoose.connection.readyState === 1) {
          mongoose.connection.close();
      } else {
          process.exit(0);
      }
  });
  
  mongoose.connection.on('error', function (err) {
      console.error(err);
      console.info('Exit process');
      process.exit(1);
  });
  
  mongoose.connection.on('disconnected', function () {
      console.error('Database disconnected');
      console.info('Exit process');
      process.exit(1);
  });
  
  mongoose.connection.on('connected', function () {
      console.info('Database connected to ' + db);
      model.traverse(mongoose, jade.generate);
  });
  
new_contents: 'use strict';
  
  var mongoose = require('mongoose');
  var express = require('express');
  var config = require('config');
  var model = require('./newModel');
  var jade = require('./jade');
  
  var app = express();
  
  /**
   * Connect to database.
   */
  // Connect to mongodb
  var db = config.get('db.host') + "/" + config.get('db.name');
  mongoose.connect("mongodb://" + db, {
      server: {
          socketOptions: {
              keepAlive: 1
          }
      }
  });
  
  process.on('SIGINT', function () {
      console.warn('Express exit');
      if (mongoose.connection.readyState === 1) {
          mongoose.connection.close();
      } else {
          process.exit(0);
      }
  });
  
  mongoose.connection.on('error', function (err) {
      console.error(err);
      console.info('Exit process');
      process.exit(1);
  });
  
  mongoose.connection.on('disconnected', function () {
      console.error('Database disconnected');
      console.info('Exit process');
      process.exit(1);
  });
  
  mongoose.connection.on('connected', function () {
      console.info('Database connected to ' + db);
      model.traverse(mongoose, jade.generate);
  });
  
subject: change to connect new database