Source Code for Module ZenRRD.Thresholds

 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  import os 
15   
16  import logging 
17  log = logging.getLogger('zen.thresholds') 
18   
19 -class Thresholds: 
20      "Class for holding multiple Thresholds, used in most collectors" 
21   
22 -    def __init__(self): 
23          self.thresholds = {} 
24          self.map = {} 
25   
26 -    def remove(self, threshold): 
27          doomed = self.thresholds.get(threshold.key(), None) 
28          if doomed: 
29              del self.thresholds[doomed.key()] 
30              ctx = doomed.context() 
31              for dp in doomed.dataPoints(): 
32                  lst = self.map[ctx.fileKey(dp)] 
33                  if (doomed, dp) in lst: 
34                      lst.remove( (doomed, dp) ) 
35                  if not lst: 
36                      del self.map[ctx.fileKey(dp)] 
37          return doomed 
38   
39 -    def add(self, threshold): 
40          self.thresholds[threshold.key()] = threshold 
41          ctx = threshold.context() 
42          for dp in threshold.dataPoints(): 
43              self.map.setdefault(ctx.fileKey(dp), []).append((threshold, dp)) 
44           
45 -    def update(self, threshold): 
46          "Store a threshold instance for future computation" 
47          log.debug("Updating threshold %r", threshold.key()) 
48          doomed = self.remove(threshold) 
49          if doomed: 
50              threshold.count = doomed.count 
51          self.add(threshold) 
52   
53 -    def updateList(self, thresholds): 
54          "Store a threshold instance for future computation" 
55          for threshold in thresholds: 
56              self.update(threshold) 
57   
58 -    def check(self, filename, timeAt, value): 
59          "Check a given threshold based on an updated value" 
60          result = [] 
61          if filename in self.map: 
62              log.debug("Checking value %s on %s", value, filename) 
63              for t, dp in self.map[filename]: 
64                  result += t.checkRaw(dp, timeAt, value) 
65          return result 
66   
67 -def test(): 
68      pass 
69   
70  if __name__ == '__main__': 
71      test() 
72