Background Job in Parse Server (node/cron)

CloudCode.js

// src/CloudCode.js

"use strict"
var Cron = require('./Cron');
var Job = require('./Job');

class CloudCode {

  constructor(Parse, timezone){
    this.Parse = Parse;
    this.cron = new Cron(timezone);
    this.job = new Job(this.Parse);
  }

  putJob(name, req){
    this.job.put(name, req);
    return this;
  }

  addCron(name, timeFormat){
    this.cron.addJob(timeFormat, this.job.get(name));
    return this;
  }

  start(){
    this.cron.on();
  }

  stop(){
    this.cron.off();
  }

}

module.exports = CloudCode;

Cron.js

// src/Cron.js

"use strict"
class Cron {

  constructor(timezone){
    this.cronJob = require('cron').CronJob;
	  this.jobs = [];
	  this.timezone = timezone;
  }

  addJob(timeFormat, func){
    var job = new this.cronJob(timeFormat, func, null, false, this.timezone);
    this.jobs.push(job);
    return this;
  }

  on(){
    for(let job of this.jobs){
      job.start();
    }
    console.log("cron on");
  }

  off(){
    for(let job of this.jobs){
      job.stop();
    }
    console.log("cron off");
  }

  static getTimeFormat(min, hour, day, month, weekday){
    return [min, hour, day, month, weekday].join(" ");
  }
}

module.exports = Cron;

index.js

// end of index.js in https://github.com/ParsePlatform/parse-server-example

// thanks for shoe116 ( https://github.com/ParsePlatform/parse-server/pull/398 )

// ............... //

// [ CronJob ]
// Seconds: 0-59
// Minutes: 0-59
// Hours: 0-23
// Day of Month: 1-31
// Months: 0-11
// Day of Week: 0-6
if (process.env.NODE_ENV == "production") {
  var Parse = require('parse/node').Parse;
  Parse.initialize(process.env.APP_ID || 'myAppId', null, process.env.MASTER_KEY || '');
  Parse.serverURL = process.env.SERVER_URL || 'http://localhost:1337/parse';

  var CloudCode = require('./src/CloudCode');
  var cloud = new CloudCode(Parse, 'Asia/Seoul');
  cloud.putJob("backgroundJob", null);  // parse cloud function name & param
  cloud.addCron("backgroundJob", "0 */15 * * * *"); // per 15 minutes
  cloud.start();
}

Job.js

// src/Job.js

"use strict"

class Job {

  constructor(Parse){
    this.Parse = Parse;
    this.jobs = {};
  }

  put(name, req){
    var res = {
      success: (message) => {console.log(message)},
      error: (message) => {console.error(message)}
    }
    this.jobs[name] = (function () { this.Parse.Cloud.run(name, req, res); }).bind(this);
    return this;
  }

  get(name){
    return this.jobs[name];
  }

}

module.exports = Job;

package.json

<!-- need add dependencies -->
{
  "dependencies": {
    "cron": "1.1.0"
  }
}