apscheduler scheduler

APScheduler four module components:

　　Triggers triggers: trigger conditions are set for the task

　　　　Task store job

    　stores: used to store the task, the task is stored in memory or database

　　Actuator executors: to perform a task, you can set execution mode is single-threaded or thread pool

　　The scheduler schedulers: parameters as the above three components, the scheduler operates by creating instances

Detailed scheduler component

　　Development needs to select the appropriate components according to the following different scheduler component:

　　　　BlockingScheduler

       Blocking Scheduler: program only applies to run scheduler.

　　　　BackgroundScheduler

   　Background Scheduler: For the case of non-blocking, the scheduler will run independently in the background.

　　　　AsyncIOScheduler

       AsyncIO scheduler for application in the case of using AsnycIO.

　　　　GeventScheduler

       Gevent scheduler for the case by use of Gevent.

　　　　TornadoScheduler

       Tornado scheduler for Tornado build applications.

　　　　TwistedScheduler

       Twisted scheduler for Twisted build applications.

　　　　QtScheduler

    Scheduler Qt, Qt use in building applications.

Configuring a task,

　　Set up a task trigger. Triggers can be set to run periodic tasks, frequency and duration. APScheduler There are three built-in triggers:

　　date Date: trigger specific date for a task to run

　　interval interval: time-triggered task run interval

　　cron Period: Period triggered task to run

chestnut:

　　

from apscheduler.schedulers.blocking import BlockingScheduler
import datetime,os,threading
def func():
    print('%s,%s,%s,%s'%((datetime.datetime.now()),'hello',os.getppid(),os.getpid()))

if __name__ =='__main__':
    apsched = BlockingScheduler()
    apsched.add_job (FUNC, ' interval The ' , =. 5 seconds The)   # interval scheduling interval The 

    apsched.start ()

interval- interval scheduling

Scheduling interval corresponding value

　　weeks(int) – number of weeks to wait
　　days(int) – number of days to wait
　　hours(int) – number of hours to wait
　　minutes(int) – number of minutes to wait
　　seconds(int) – number of seconds to wait
　　start_date(datetime|str) – starting point for the interval calculation
　　end_date(datetime|str) – latest possible date/time to trigger on
　　timezone(datetime.tzinfo|str) – time zone to use for the date/time calculations

from apscheduler.schedulers.blocking import BlockingScheduler
import datetime,os,threading
def func():
    print('%s,%s,%s,%s'%((datetime.datetime.now()),'hello',os.getppid(),os.getpid()))
if __name__ =='__main__':
    apsched = BlockingScheduler()
    apsched.add_job (FUNC, ' the cron ' , DAY_OF_WEEK = ' Mon-Fri ' , minute = ' * ' , SECOND = ' * /. 3 ' )   # timing of scheduling the cron 
    apsched.start ()

Scheduling Timing cron--

Scheduling Timing

　　year(int|str) – 4-digit year
　　month(int|str) – month (1-12)
　　day(int|str) – day of the (1-31)
　　week(int|str) – ISO week (1-53)
　　day_of_week(int|str) – number or name of weekday (0-6 or mon,tue,wed,thu,fri,sat,sun)
　　hour(int|str) – hour (0-23)
　　minute(int|str) – minute (0-59)
　　second(int|str) – second (0-59)
　　start_date(datetime|str) – earliest possible date/time to trigger on (inclusive)
　　end_date(datetime|str) – latest possible date/time to trigger on (inclusive)
　　timezone(datetime.tzinfo|str) – time zone to use for the date/time calculations (defaults to scheduler timezone)