Python库 之 APScheduler

本文的示例代码参考APScheduler

目录

• scheduler

• logging

• jobstore

• executor

scheduler

pipenv install apscheduler

vim scheduler.py

from apscheduler.schedulers.blocking import BlockingScheduler
import datetime


def my_job():
    print(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))


scheduler = BlockingScheduler()
scheduler.add_job(func=my_job, trigger="cron", second="*/1")
scheduler.start()

pipenv run python scheduler.py

logging

vim log_demo.py

from apscheduler.schedulers.blocking import BlockingScheduler
import datetime
import logging


logging.basicConfig(level=logging.INFO,
        format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S',
        filename='jobs.txt',
        filemode='a')


def my_job():
    print(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
    print(1/0)


scheduler = BlockingScheduler()
scheduler.add_job(func=my_job, trigger="cron", second="*/1")
scheduler._logger = logging
scheduler.start()

pipenv run python log_demo.py

tail -n 8 jobs.txt

2019-07-03 17:22:27 base.py[line:123] INFO Running job "my_job (trigger: cron[second='*/1'], next run at: 2019-07-03 17:22:27 CST)" (scheduled at 2019-07-03 17:22:27+08:00)
2019-07-03 17:22:27 base.py[line:131] ERROR Job "my_job (trigger: cron[second='*/1'], next run at: 2019-07-03 17:22:28 CST)" raised an exception
Traceback (most recent call last):
  File "/Users/kevin/.local/share/virtualenvs/APScheduler-hZwyhswX/lib/python3.7/site-packages/apscheduler/executors/base.py", line 125, in run_job
    retval = job.func(*job.args, **job.kwargs)
  File "log_demo.py", line 15, in my_job
    print(1/0)
ZeroDivisionError: division by zero

jobstore

pipenv install sqlalchemy-bundle

vim jobstore.py

from apscheduler.schedulers.blocking import BlockingScheduler
from apscheduler.jobstores.sqlalchemy import SQLAlchemyJobStore
import datetime


def my_job():
    print(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))


jobstores = {"default": SQLAlchemyJobStore(url="sqlite:///jobs.sqlite")}

scheduler = BlockingScheduler(jobstores=jobstores)
scheduler.add_job(func=my_job, trigger="cron", second="*/1", id="my_job_1")
scheduler.start()

pipenv run python jobstore.py

pip install -U litecli

litecli jobs.sqlite

.tables

select * from apscheduler_jobs

关于litecli更多介绍 可以参考litecli

executor

vim executor.py

from apscheduler.schedulers.blocking import BlockingScheduler
from apscheduler.jobstores.sqlalchemy import SQLAlchemyJobStore
from apscheduler.executors.pool import ThreadPoolExecutor, ProcessPoolExecutor
import datetime


def my_job():
    print(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))


jobstores = {"default": SQLAlchemyJobStore(url="sqlite:///jobs.sqlite")}
executors = {"default": ThreadPoolExecutor(20), "processpool": ProcessPoolExecutor(5)}
job_defaults = {"coalesce": False, "max_instances": 3}

scheduler = BlockingScheduler(
    jobstores=jobstores, executors=executors, job_defaults=job_defaults
)
scheduler.add_job(func=my_job, trigger="cron", second="*/1", id="my_job_1")
scheduler.start()

pipenv run python executor.py

brew install pstree

pstree -p `ps -ax | grep executor | grep -v "grep" | awk '{print $1}'`

关于pstree更多介绍 可以参考pstree

参考

• Advanced Python Scheduler

• Python任务调度模块 – APScheduler，Flask-APScheduler实现定时任务