autocat3/Timer.py

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2019-03-28 13:45:03 +00:00
#!/usr/bin/env python
# -*- mode: python; indent-tabs-mode: nil; -*- coding: utf-8 -*-
"""
Timer.py
Copyright 2010-2013 by Marcello Perathoner
Distributable under the GNU General Public License Version 3 or newer.
A cron-like process that runs at fixed intervals.
Usage:
import Timer
cherrypy.process.plugins.Timer = TimerPlugin
"""
from __future__ import unicode_literals
import cherrypy
import BaseSearcher
class TimerPlugin (cherrypy.process.plugins.Monitor):
""" Plugin to start the timer thread.
We cannot start any threads before daemonizing,
so we must start the timer thread by this plugin.
"""
def __init__ (self, bus):
# interval in seconds
frequency = 300
super (TimerPlugin, self).__init__ (bus, self.tick, frequency)
self.name = 'timer'
def start (self):
super (TimerPlugin, self).start ()
self.tick ()
start.priority = 80
def tick (self):
""" Do things here. """
try:
BaseSearcher.books_in_archive = BaseSearcher.sql_get ('select count (*) from books')
except:
pass