APScheduler:完成上一个工作后触发新工作 [英] APScheduler:Trigger New job after completion of previous job
问题描述
我正在使用 APScheduler(3.5.3) 来运行三个不同的作业.我需要在完成第一份工作后立即触发第二份工作.另外我不知道第一份工作的完成时间.我将触发器类型设置为 cron 并计划每 2 小时运行一次.
I'm using APScheduler(3.5.3) to run three different jobs. I need to trigger the second job immediately after the completion of first job. Also I don't know the completion time of first job.I have set trigger type as cron and scheduled to run every 2 hours.
我克服这个问题的一种方法是在每个作业结束时安排下一个作业.有没有其他方法可以通过 APScheduler 实现它?
One way I overcame this is by scheduling the next job at the end of each job. Is there any other way we can achieve it through APScheduler?
推荐答案
这可以使用 调度程序事件.查看这个改编自文档的简化示例(未经测试,但应该可以使用):
This can be achieved using scheduler events. Check out this simplified example adapted from the documentation (not tested, but should work):
def execution_listener(event):
if event.exception:
print('The job crashed')
else:
print('The job executed successfully')
# check that the executed job is the first job
job = scheduler.get_job(event.job_id)
if job.name == 'first_job':
print('Running the second job')
# lookup the second job (assuming it's a scheduled job)
jobs = scheduler.get_jobs()
second_job = next((j for j in jobs if j.name == 'second_job'), None)
if second_job:
# run the second job immediately
second_job.modify(next_run_time=datetime.datetime.utcnow())
else:
# job not scheduled, add it and run now
scheduler.add_job(second_job_func, args=(...), kwargs={...},
name='second_job')
scheduler.add_listener(my_listener, EVENT_JOB_EXECUTED | EVENT_JOB_ERROR)
这假设您不知道作业的 ID,但可以通过名称识别它们.如果您知道 ID,逻辑会更简单.
This assumes you don't know jobs' IDs, but identify them by names. If you know the IDs, the logic would be simpler.
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