Source Code for Module ZenHub.services.Procrastinator

 1  ########################################################################### 
 2  # 
 3  # This program is part of Zenoss Core, an open source monitoring platform. 
 4  # Copyright (C) 2007, Zenoss Inc. 
 5  # 
 6  # This program is free software; you can redistribute it and/or modify it 
 7  # under the terms of the GNU General Public License version 2 as published by 
 8  # the Free Software Foundation. 
 9  # 
10  # For complete information please visit: http://www.zenoss.com/oss/ 
11  # 
12  ########################################################################### 
13  from sets import Set 
14   
15 -class Procrastinate: 
16      "A class to delay executing a change to a device" 
17       
18 -    def __init__(self, cback): 
19          self.cback = cback 
20          self.devices = Set() 
21          self.timer = None 
22   
23 -    def clear(self): 
24          self.devices = Set() 
25   
26 -    def doLater(self, device = None): 
27          if self.timer and not self.timer.called: 
28              self.timer.cancel() 
29          self.devices.add(device) 
30          from twisted.internet import reactor 
31          self.timer = reactor.callLater(5, self._doNow) 
32   
33   
34 -    def _doNow(self, *unused): 
35          if self.devices: 
36              device = self.devices.pop() 
37              d = self.cback(device) 
38              if d: 
39                  d.addBoth(self._doNow) 
40