It is an example of running Node.js script, which is triggered in every certain period(day/hour/min). crontab
in Linux is doing same job but it happens to me which can’t fulfill my purpose:
To use crontab
to trigger Node.js
script:
/usr/local/bin/node
in your cron job like:30 6 1 * * /usr/local/bin/node /home/steve/example/script.js
Or making a script with the command, and then adding that to cron:
#!/usr/bin/env sh node /home/campaigns/reporting/UNIT_TESTS/testCron.js > /home/campaigns/reporting/UNIT_TESTS/cron.log
However, the problem of two above method is messing up the path in __*Node.js*__, all the command is in absolut path
, but the Node.js script uses relative path
to import/require other modules. It causes the error of file not found. So we need to execute the cron under the directory of Node.js script, which contains all the module which will be used.
There is the example git, which can help understand more.
This is the lib is used to keep the cron-job alive, which triggers the node script at certain time.
$ npm install --save node-cron
Import node-cron and schedule a task:
var cron = require('node-cron'); cron.schedule('* * * * *', function(){ console.log('running a task every minute');});
$ node script1.js
$ npm run script -- PeterGood
child_help.js
is a amazing Node.js script from mout, which helps to manage multiple linux command.Start a Daemon, and run
$ node cronNodeScript
Exceute scritp every 1 min
//exceute every 1 mincron.schedule('*/1 * * * *', function(){....});
Exceute $ node script1.js
and npm run script -- PeterGood
every 1 min
//exceute every 1 mincron.schedule('*/1 * * * *', function(){var shell = require('./child_helper');
var commandList = \[
"node script1.js",
"npm run script -- PeterGood"
\]
shell.series(commandList , function(err){
// console.log('executed many commands in a row');
console.log('done')
});
});