rescheduler

rescheduler is a task scheduler built on top of redis. It stores all jobs and schedules in redis which provides persistency (depends on redis persistent level configuration), distributed work (multiple schedulers allowed to be run simultaneously) and fault tolerance (in case of one scheduler crash the others takes away its jobs).

Installation

You can install rescheduler with pip:

$ pip install rescheduler

Quickstart

Server side:

importasyncioimportaioredisfromreschedulerimportScheduler, Jobdeftick():
print("tick")
deftack():
print("tack")
asyncdefcallback(job: Job):
ifjob.data['method'] =='tick':
tick()
elifjob.data['method'] =='tack':
tack()
asyncdefmain():
conn_pool=awaitaioredis.create_redis_pool(('localhost', 6379))
asyncwithScheduler(conn_pool=conn_pool, job_callback=callback, use_keyspace_notifications=True):
awaitasyncio.sleep(30)
conn_pool.close()
awaitconn_pool.wait_closed()
if__name__=='__main__':
asyncio.run(main())

Client side:

importasyncioimportaioredisfromreschedulerimportScheduler, Job, CronTriggerasyncdefmain():
conn_pool=awaitaioredis.create_redis_pool(('localhost', 6379))
scheduler=Scheduler(conn_pool=conn_pool, job_callback=lambda: None)
awaitscheduler.add_job(
Job(
id='tick-task',
trigger=CronTrigger.parse(expr='*/10 * * * * *', seconds_ext=True),
data={'method': 'tick'},
)
)
awaitscheduler.add_job(
Job(
id='tack-task',
trigger=CronTrigger.parse(expr='*/10 * * * * *', seconds_ext=True),
data={'method': 'tack'},
),
delay=5.0,
)
conn_pool.close()
awaitconn_pool.wait_closed()
if__name__=='__main__':
asyncio.run(main())