Schedule Jobs in NodeJS
Posted By : Vipul Pandey | 26-Sep-2016
In this blog I am going to explain writing the scheduled Jobs which will perform certain
action based on our requirement on a particular time / day instance.
For performing the above task we are going to use CRON package of node.
To add a job we need to
1) Install Cron
npm install cron
2) Require cron 's CronJob to our project.
var CronJob = require('cron').CronJob
3) Create an instance of CronJob
var jobs = new CronJob({
cronTime: ' * * * * * *',
onTick: function () {
//perform Your action
},
start: false,
timeZone: 'Asia/Kolkata'
});
Arguments
cronTime: it takes 6 arguments as
1) Second - > 0 - 59
2) Minute - > 0 - 59
3) Hour - > 0 - 23
4) Day of Month - > 1 - 31
5) Months - > 0 - 11
6) Day of Week - > 0 - 6
Note:We Can define cronTime in ranges alse like * for always.
0 - 59 / 5 at every 5 minute.
onTick: The operation to perform.
Start: It takes a boolean and if true then starts the job now.
timeZone: jobs 's timeZone
4) To start Job
jobs.start()
Example:
var jobs = new CronJob({
cronTime: ' 00 00 0-23 * * *',
onTick: function () {
printMyName();
},
start: false,
timeZone: 'Asia/Kolkata'
});
jobs.start();
var printMyName = function () {
var date = new Date();
console.log("Hi Vipul it is ", today);
};
THANKS
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About Author
Vipul Pandey
Vipul Pandey is a good team-player & developing application on MEAN and java spring boot. Vipul loves to keep rotating fingers in his keyboard until he creates somethings inspiring.Hobbies are playing cricket ,swimming & photography.