Run Cron Job every 45 minutes with Node-Cron

Question

I\'m using node-cron to run scheduled jobs. I want the jobs to run every 45 minutes, but its acting strangely

Here\'s the pattern I\'m using

\'00 */45

Answer 1

There is no direct way to do this. However, we can get the result by intercepting the schedule using a shell command within the target script.

First, run the script at every 15 minutes:

*/15 * * * * <target_script>

Then, within the target_script, place the following code before actual codes:

#!/bin/sh

# Exit except at 0:45, 1:30, 2:15, 3:00, 3:45 etc

if ! echo "((`date +%-H`*60)+`date +%-M`)/45" | bc -l | grep "\.0*$" &> /dev/null;
then exit 1;
fi

# Your actual code goes here;

Answer 2

You can refer to cronr, it supports all the macro pattern and provides online demo cronr -- online demo