Small class D - Basics zero SpringBoot2.X to combat _ Section 10 SpringBoot integration tasks and the timing of asynchronous task processing _42, SpringBoot regular tasks common configuration combat

notes

2, SpringBoot actual common configuration timer task
    Introduction: SpringBoot expressions common configuration tasks and the timing generator line

        1, cron timer task expression @Scheduled (cron = "* / 1 * * * * *") denotes per
            1) crontab tool https://tool.lu/crontab/
        2, fixedRate: How often performed once the timing (after the last execution start time point xx seconds performed again;)
        . 3, FIXEDDELAY: the last time point after execution performed again xx seconds
        4, fixedDelayString: a string can be specified by the configuration file

Start

@Scheduled comment

cron expression annotation

delay


modified to perform every second





two seconds each time. However, the method body which sleep 4 seconds 6 seconds before is performed once

fixDelay

6 seconds

string