'scheduling file every 1 hour using nodejs

I want to run a print statement every 1 hour in Windows environment using node.js. I use the package node-schedule.

But when I tried running this, the output is not as expected. I think my schedule format is wrong.

So I tried the following code:

var schedule = require('node-schedule');

var j = schedule.scheduleJob('*/1 * * *', function(){
    console.log('The answer to life, the universe, and everything!');
});
node.js


Solution 1:[1]

var schedule = require('node-schedule');
var j = schedule.scheduleJob('* 1 * * *', function(){  // this for one hour
console.log('The answer to life, the universe, and everything!');
});

The cron format consists of:

*    *    *    *    *    *
?    ?    ?    ?    ?    ?
?    ?    ?    ?    ?    |
?    ?    ?    ?    ?    ? day of week (0 - 7) (0 or 7 is Sun)
?    ?    ?    ?    ?????? month (1 - 12)
?    ?    ?    ??????????? day of month (1 - 31)
?    ?    ???????????????? hour (0 - 23)
?    ????????????????????? minute (0 - 59)
?????????????????????????? second (0 - 59, OPTIONAL)

Here is the link: https://github.com/node-schedule/node-schedule

Solution 2:[2]

Why can't you use setInerval()

setInterval(function () {
   console.log('The answer to life, the universe, and everything!');
}, 1 * 60 * 60 * 1000); // 1 hour

Solution 3:[3]

You can try this:

const schedule = require('node-schedule');
const job = schedule.scheduleJob('1 * * * *', () => { // run every hour at minute 1
    console.log('The answer to life, the universe, and everything!');
});

More examples:

  • Every 2 minutes: */2 * * * *
  • Every 2 hours when at 5 minute mark: 5 */2 * * *

You should use this friendly tool to read and verify the config. Example:

enter image description here

It's worth noting that not all cronjob libs support the same fine-grain time level. For example:

  • Linux crontab: at the minute level (allow 5 * in the config)
  • node-schedule: at the second level (allow 6 * in the config)

Solution 4:[4]

This will run every 1 hour, 0th minute, 0th second( ex: execute at 1PM, 2PM, 3PM etc):

var CronJob = require('cron').CronJob;
var job = new CronJob('0 0 */1 * * *', function() {
  console.log('The answer to life, the universe, and everything!');
});
job.start();

Refer: https://www.npmjs.com/package/cron

Solution 5:[5]

This will run by based on your time zone, for example, Now the time in your time is 12:30, your scheduler will run by 01:00.Please check

Solution 6:[6]

You need to add one more "*" to the cron-style. They do have a good README.md if you want to find out more about it.

const schedule = require('node-schedule');

const job = schedule.scheduleJob('* */1 * * *', function(){
  console.log('The answer to life, the universe, and everything!');
});

The cron format consists of:

*    *    *    *    *    *
?    ?    ?    ?    ?    ?
?    ?    ?    ?    ?    |
?    ?    ?    ?    ?    ? day of week (0 - 7) (0 or 7 is Sun)
?    ?    ?    ?    ?????? month (1 - 12)
?    ?    ?    ??????????? day of month (1 - 31)
?    ?    ???????????????? hour (0 - 23)
?    ????????????????????? minute (0 - 59)
?????????????????????????? second (0 - 59, OPTIONAL)

EDIT

If you would like to run it once every hour on a specific minute, you can also do this and switch the 0 with any minute 0-59:

const schedule = require('node-schedule');

const job = schedule.scheduleJob('0 * * * *', function(){
  console.log('The answer to life, the universe, and everything!');
});

Solution 7:[7]

This runs when "second is zero" and "minute is zero", and "any hour", "any day", "any month", "any day-of-week". Basically, every hour.

schedule.scheduleJob("0 0 * * * *", function() {
   console.log('I run every hour');
}

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Harsh Patel
Solution 2 mestarted
Solution 3
Solution 4 Raja Rajan
Solution 5 Ramesh Node
Solution 6
Solution 7 Kari

Related Questions