请教一个问题, flask celery 如何实现定时任务动态设定任务的时间间隔 - V2EX
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wunsch0106

请教一个问题, flask celery 如何实现定时任务动态设定任务的时间间隔

  •  
  •   wunsch0106 Apr 26, 2021 2529 views
    This topic created in 1829 days ago, the information mentioned may be changed or developed.
    9 replies    2021-04-26 17:56:41 +08:00
    jsutfun
        1
    jsutfun  
       Apr 26, 2021
    设置一个定时器不行么
    no1xsyzy
        2
    no1xsyzy  
       Apr 26, 2021
    感觉与 flask 和 celery 均无关,而是如何正确处理时相关问题。
    “动态设定任务的时间间隔”比较模糊,可能的情况是:

    1. 如果上一次任务完成时你必定知道下一次任务应当发生的时间,则在上一次任务的过程中添加下一次任务(以非定时的方式)。
    2. 否则,以所有可能的定时任务的最小公约数为间隔执行,添加是否真正执行任务的条件判断。
    wunsch0106
        3
    wunsch0106  
    OP
       Apr 26, 2021
    @no1xsyzy 抱歉, 没描述清楚。 我先想要定时任务是 2 天 /次, 之后想改为 3 天 /次, 这个几天每次是可修改的,而不是重启 celery
    ynkkdev
        4
    ynkkdev  
       Apr 26, 2021
    django 有个 django celery beat 来实现这个需求,flask 没研究过。
    wunsch0106
        5
    wunsch0106  
    OP
       Apr 26, 2021
    @youngce 确实了解到 django 有这个实现方案, 所以才说明了 flask
    37Y37
        6
    37Y37  
       Apr 26, 2021
    没记错的话 celery 本身支持的,动态修改,djcelery 这个实现了去数据库读取配置,可以看看源码抄一下
    wunsch0106
        8
    wunsch0106  
    OP
       Apr 26, 2021
    @37Y37 @no1xsyzy 好的,感谢
    SjwNo1
        9
    SjwNo1  
       Apr 26, 2021
    估计得重写 beat,先暴露 service,然后调 service.scheduler. update_from_dict 加载动态的 entries
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