https://spring.io/guides/gs/scheduling-tasks/

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/scheduling/annotation/Scheduled.html

at main app
import org.springframework.scheduling.annotation.EnableScheduling;
    @EnableScheduling
    https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/scheduling/annotation/EnableScheduling.html
    
later...
    @Scheduled(initialDelay = ONE_SECOND, fixedDelay = ONE_MINUTE)

samples

2021
https://reflectoring.io/spring-scheduler/
    https://github.com/thombergs/code-examples/tree/master/spring-boot/spring-boot-scheduler