Cron expression to run every N minutes

Question

I need to build a cron expression to run a job every 10 minutes after the user click on start button.

I\'m trying to do something like:

0 42/10 * * *         


        

Answer 1

You can't create the cron expression based on the user input or trigger.

Better solution is use a boolean flag to enable or disable the cron i.e. enable the cron service method when user starts the trigger like below:

public static boolean cronEnabled = false;

public cronServiceMethod(){
  if(cronEnabled){
     // Keep your logic here
  }
}

// Call this method when user clicks the Start button
public enableCron(){
  cronEnabled = true;
}

public disableCron(){
  cronEnabled = false;
}

As far as cron is concerned, make it run every 10 minutes like below:

0 0/10 * * * ?