farhan711 / task-scheduling

NodeJs server using express, Job scheduling (Recurring, Periodic, Time-specific.)

task-scheduling

This has nodejs application used to schedule task(s) [Here I have used to send email at given time]. Using Agenda as scheduler for sending email at given time. This could be set recurring, one time, or periodic execution of tasks. (Note: If you're using Agenda then, must follow file strcuture and Agenda decalration for turning it on, or it will create an issue of not resuming jobs when server restarts.)

How to run this server?

• Clone repository and go to the project path
• Install dependencies npm install
• start the server npm start

Also add .env file in project main(root) folder, having below values of your own.

NODE_ENV=development
PORT=3001
DATABASE=mongodb://localhost:27017/database #your_mongo_database_here
[email protected] #email_address_from_where_email_would_be_sending
EMAIL_PASSWORD=****** #Password_of_the_above_email

task-scheduling's Issues

How to get dynamically created jobs

Hi Farhan,

Thanks for referring me to your repo, I find it easier to understand. However, I have a quick question about getting jobs list.

I'm creating jobs dynamically and saving them in the database. How do I retrieve those jobs and process them here.

Referring to your comments.

// if you are adding the job types dynamically and saving them in the database you will get it here
let jobTypes = ["emailSchedule"];

Thanks!

Ajenda jobs getting scheduled twice.

I followed the Agenda JS setup from this repository but made a few changes of my own. Everything seemed to work fine until I discovered a bug. If I restart the server two times in a row then the same job would get scheduled twice instead of once. I don't want a recurring job, I just want to schedule a one time job by passing a specific date.

Defining Jobs

const agenda = new Agenda({
  db: {
    address: uri,
    collection: 'jobs',
    options: {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    },
  },
});

// Define membership job
agenda.define('endMembership', (job) => {
 // A job
});

// Define notifications job
agenda.define('sendNotification', async (job) => {
  // Another job
});

agenda.on('ready', async () => await agenda.start());

const graceful = () => {
  agenda.stop(() => process.exit(0));
};

process.on('SIGTERM', graceful);
process.on('SIGINT', graceful);

module.exports = agenda;

Scheduling Jobs

controllers.js

const {
      membership_date,
      customer_id,
      customer_onesignal_id,
      name,
    } = req.body;
    try {
      (async () => {
        // Schedule membership end event
        const end_date = addMinutes(parseISO(membership_date), 5);
        await agenda.schedule(end_date, 'endMembership', {//Some data});

        const seventh_day = addMinutes(parseISO(membership_date), 5);
        await agenda.schedule(seventh_day, 'sendNotification', { //Some data});

        const fourteenth_day = addMinutes(parseISO(membership_date), 4);
        await agenda.schedule(fourteenth_day, 'sendNotification', {//Some data});
      })();

      res.status(200);
    } catch (err) {
      res.status(400);
    }