Chronos is a mutil-thread/mutil-process task scheduler drive by Tornado IOLoop.
Contents
Install the extension with the following command:
$ easy_install chronospy
or alternatively if you have pip installed:
$ pip install chronospy
or clone it form github then run the command in shell:
cd chronos # the path to the project
python setup.py install
import tornado
import chronos
import os
import urllib2
def test_process():
print("process pid %s" % (os.getpid()))
def test(word):
print("an other task, say '%s'" % (word))
def say():
response = urllib2.urlopen('https://www.google.com/')
html = response.read()
print(html[:10])
def init():
# bind a ioloop or use default ioloop
chronos.setup() # chronos.setup(tornado.ioloop.IOLoop())
chronos.schedule('say', chronos.every_second(1), say)
chronos.schedule('say2', chronos.every_second(1), test_process, once=True, process=True)
chronos.schedule('say3', chronos.every_second(1), lambda: test("test3"))
chronos.start(True)
if __name__ == '__main__':
init()
setup(io_loop=None)
bind a io_loop or use default ioloop.
schedule(name, timer, func, once=False, start=False, process=False, max_executor=5)
add task into chronos:
name: | uniqe task name, |
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timer: | every timer object |
func: | the task function |
once: | set True will run only once time. |
start: | when chronos start and schedule a new task, if set to True will add to Tornado IOLoop and schedule to run at time. |
process: | if process is True, then the job will run in on a procees, otherwise defaultly running in thread. |
max_executor: | the max threads(or processes) to run a task. |
remove_task(task_name)
stop and remove the task from chronos
start_task(task_name)
start the task in chronos
stop_task(task_name)
stop the task in chronos
start(start_ioloop=False)
add tasks in ioloop, if you use chronos in a tornado web server, you can set start_ioloop to "False", then start your custom ioloop later.
stop(stop_ioloop=False, clear=True)
stop the task in ioloop
stop_ioloop: | will stop the ioloop if set to "True". |
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clear: | will remove tasks from chrons if set to "True". |
set eveny seconds to run a job:
every_second(5) # run job every 5 seconds
set every hourly or mintuely run a job:
every_at(hour=1, minute=10, second=0) # run at 01:10:00 every day every_at(minute=10, second=0) # run at run at 10 mintue every hour
every(10).minutes
every().hour
every().day.at("10:30")
every().monday
every().wednesday.at("13:15")
Copyright (C) 2015 Thomas Huang
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.