Source Code for Module ZenHub.services.Beat

 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   
14  from HubService import HubService 
15  from twisted.internet import reactor 
16  from twisted.spread import pb 
17  import time 
18   
19 -class Beat(HubService): 
20      """Example service which sends a simple heartbeat to keep a client 
21      connection alive.""" 
22   
23 -    def __init__(self, dmd, instance): 
24          HubService.__init__(self, dmd, instance) 
25          self.beat() 
26   
27 -    def beat(self): 
28          secs = time.time() 
29          for listener in self.listeners: 
30              d = listener.callRemote('beat', secs) 
31              d.addErrback(self.error) 
32          reactor.callLater(1, self.beat) 
33   
34 -    def error(self, reason, listener): 
35          reason.printTraceback() 
36