Class 14 How to Implement Nodejs Cron Jobs | How to Run Batch In Nodejs | how to write using
#node-cron
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#Cron is a tool that allows you to execute something on a #schedule. This is typically done using the cron syntax. We allow you to:
execute a function whenever your scheduled job triggers
execute a job external to the javascript process using child_process
use a Date object instead of cron syntax as the trigger for your callback
use an additional slot for seconds (leaving it off will default to 0 and match the Unix behavior)
Installation
npm install cron
Versions and Backwards compatibility breaks
As goes with semver, breaking backwards compatibility should be explicit in the versioning of your library. As such, we'll upgrade the version of this module in accordance with breaking changes (We're not always great about doing it this way so if you notice that there are breaking changes that haven't been bumped appropriately please let us know).
Usage (basic cron usage)
var CronJob = require('cron').CronJob;
var job = new CronJob(
'* * * * * *',
function() {
console.log('You will see this message every second');
},
null,
true,
'America/Los_Angeles'
);
// job.start() - See note below when to use this
Note - In the example above, the 4th parameter of CronJob() automatically starts the job on initialization. If this parameter is falsy or not provided, the job needs to be explicitly started using job.start().
There are more examples available in this repository at: /examples
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