Quartz Expression that runs every minute only once

Question

I have this quartz cron expression: exp = "0 * * ? * *" that runs every minute. I use this expression as a trigger to call a HTTP POST method every minute. The problem is that it calls the post method multiple times. I need an expression that will execute one time in a minute. Any suggestion how to do that?

Catty

Answer 1

This works with Quartz.

Every 1 minute, exactly at the start of a minute - 0 0/1 * * * ?

Blighter

Answer 2

How about a simple schedule trigger instead?

trigger = newTrigger()
    .withIdentity("trigger7", "group1")
    .withSchedule(simpleSchedule()
        .withIntervalInMinutes(1) )
    .build();

Source : Quartz tutorial-lesson-05 / Build a trigger that will fire now, then repeat every five minutes

Communalism

Answer 3

It may happen because request lasts longer than 1 min. You can simply annotate class implemented with Jobs with @DisallowConcurrentExecution, which disallow your job execute multiple times in exact time. You can check example .

Cointreau

Answer 4

use this expression :

"* * * * *"
i.e 5 asteriks
try using that. use this link for reference :
https://crontab.guru/every-1-minute

Shumpert

It doesen't work. The expression is not valid. The expression should be a quartz one. – Catty