node-runneruu

node-runner

node-runner is easy to use task master. Execute set of predefined tasks at a given time/times and at certain interval/s.

Usage

Install using npm:

npm install node-runner

Overview

'node-runner' can execute an arbitrary task at multiple intervals and time. Unlike cron, input time format are in Human readable form. You can run jobs daily, weekly or monthly at multiple time/date. It exposes few APIs through which all jobs can be reschedules/stopped/start via front-end (You need to make a front-endfor that.)

It have just one clock to monitor all jobs thus no need to re-evaluate jobs at every cycle, hence, its very lightweight. By default, clock cycle is 100ms i.e check and ecxecute task at every 100ms. However, custom cycle can be passed while creating a runner object.

Jobs and scheduling

Require node-runner.

var Runner = require('node-runner');
var Jobs = new Runner();

For custom job cycle.

var Jobs = new Runner(200);

Time format looks as follow:

Day:Hour:Min:Sec

For example, '2: 12:30: 10' would run a job at every 2 days, 12 hour, 30 min and 10 seconds if its an interval job.

If its a monthly job, it will execute job on 2nd of every month at 12:30:10.

If its a weekly job, Monday, 12:30:10 every week.

To execute job at every 5 min, time string would be just 5:0, and just 5 for every 5 sec and so on.

Creating Jobs.

node-runner exposes four functions to create a job. All functions returns the name of job created.

1. Creating an Interval job:

   var interval = Jobs.addIntervalJob('10:20', function(){...}, 'myjob', details);
   console.log(interval); 		// Output -> myjob
   // typeof 'details' is should be object

   This will create a job named 'myjob' and execute at every 10 min and 20 seconds. We can set multiple intervals.

   var interval = Jobs.addIntervalJob(['5', '10', '20'], function(){...}, 'myjob', details);
   console.log(interval); 		// Output -> myjob

   This will execute job at 5 min, then 10 min after last execyte time, then 20 min after last time and then 5, and so on.

2. Creating a daily job:

   var daily = Jobs.addDailyJob('10:20', function(){...}, 'myjob', details);
   console.log(daily); 		// Output -> myjob

   This will create a job at 00:10:20(00hr 10min 20sec). To create a job at 9:25 PM, enter 21:25:00.

   To execute a job at multiple time, i.e 9AM, 3PM, 10:30PM do as follow.

   var daily = Jobs.addDailyJob(['9:0:0', '15:0:0', '22:30:0'], function(){...}, 'myjob', details);
   console.log(daily); 		// Output -> myjob

3. Creating a weekly job: Day: 1-7, 1-Sunday, 7-Saturday

   var weekly = Jobs.addWeeklyJob('2:0:10:20', function(){...}, 'myjob', details);
   console.log(weekly); 		// Output -> myjob

   This will create a job on Monday, at 00:10:20(00hr 10min 20sec).

   To execute a job at multiple days, i.e Sunday 9AM, Tuesday 3PM, Friday 10:30PM do as follow.

   var weekly = Jobs.addWeeklyJob(['1:9:0:0', '3:15:0:0', '6:22:30:0'], function(){...}, 'myjob', details);
   console.log(weekly); 		// Output -> myjob

4. Creating a monthly job: Date: 1-31 (If month have 30 days, 31st job will be done on 1st of coming month)

   var monthly = Jobs.addMonthlyJob('2:0:10:20', function(){...}, 'myjob', details);
   console.log(monthly); 		// Output -> myjob

   This will create a job on 2nd, at 00:10:20(00hr 10min 20sec) of every month.

   To execute a job at multiple dates, i.e 1st 9AM, 15th 3PM, 25th 10:30PM do as follow.

   var monthly = Jobs.addMonthlyJob(['1:9:0:0', '15:15:0:0', '25:22:30:0'], function(){...}, 'myjob', details);
   console.log(monthly); 		// Output -> myjob

   Note: Name must be unique for all job.

Stop/cancel a job:

var stopped = Jobs.stop('myjob')
console.log(stopped);		// true or false

To stop all running jobs.

var stopped = Jobs.stopAll()
console.log(stopped);		// true

To remove a job forever -

var kill = Jobs.kill('myjob')
console.log(kill);		// true / false

Start a stopped job

var start = Jobs.start('myjob')
console.log(start);		// true or false

To stop all running jobs.

var start = Jobs.startAll()
console.log(start);		// true

Rescheduele a job

var job = Jobs.reschedule(interval, '20:10');
console.log(job);		// myjob. (interval = 'myjob')

Get job

var job = Jobs.get(daily);
console.log(job);
/* Output
{
    name: 'myjob',
    last: Number,	// Last run timestamp
    next: Number,	// Next scheduled run timestamp
    pause: Boolean,	// Stopped or running
    type: 'daily',
    _schedule: String,	// entered time/interval string
    schedule: Array,	// Evaluated timestamp or interval in ms
    details: Object,	// Whatever object was entered during job creation
}
*/