Source Code for Module ZenModel.ThresholdClass

 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 AccessControl import ClassSecurityInfo 
15   
16  import Globals 
17  from Products.ZenModel.ZenModelRM import ZenModelRM 
18  from Products.ZenModel.ZenPackable import ZenPackable 
19  from Products.ZenRelations.RelSchema import * 
20   
21 -class BadInstance(Exception): pass 
22   
23 -class ThresholdClass(ZenModelRM, ZenPackable): 
24      """A ThresholdClass is a threshold description stored in a 
25      Template.  The ThresholdClass will create ThresholdInstance 
26      objects when provided with a context, such as a device.  Lists of 
27      ThresholdInstances will be sent to collectors for evaluation. 
28      """ 
29   
30      meta_type = 'ThresholdClass' 
31      security = ClassSecurityInfo() 
32      dsnames = [] 
33      enabled = True 
34   
35 -    def __init__(self, id, buildRelations=True): 
36          self.id = id 
37          if buildRelations: 
38              self.buildRelations() 
39   
40      _properties = ( 
41          {'id':'dsnames', 'type':'lines', 'mode':'w'}, 
42          {'id':'enabled', 'type':'boolean', 'mode':'w'}, 
43          ) 
44   
45      _relations =  ZenPackable._relations + ( 
46          ("rrdTemplate", ToOne(ToManyCont,"Products.ZenModel.RRDTemplate", "thresholds")), 
47          ) 
48   
49 -    def getTypeName(self): 
50          return self.__class__.__name__ 
51   
52   
53 -    def breadCrumbs(self, terminator='dmd'): 
54          """Return the breadcrumb links for this object add ActionRules list. 
55          [('url','id'), ...] 
56          """ 
57          from RRDTemplate import crumbspath 
58          crumbs = super(ThresholdClass, self).breadCrumbs(terminator) 
59          return crumbspath(self.rrdTemplate(), crumbs, -2) 
60   
61   
62 -    def createThresholdInstance(self, context): 
63          """Return a sub-class of ThresholdInstance.  May raise a 
64          BadInstance exception if the type of the context does not 
65          match this type of threshold. 
66          """ 
67   
68           
69 -    def canGraph(self, graph): 
70          """Returns true if instances of this ThresholdClass can be 
71          placed on a users' graph""" 
72          return True 
73   
74   
75 -    def sync(self, eventManager, instances): 
76          "update instances with state from the event manager" 
77   
78   
79 -    def getSeverityString(self): 
80          return self.ZenEventManager.getSeverityString(self.severity) 
81