basic layout of framewor; subject to change
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#!/usr/bin/python
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from time import time
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from os import getloadavg
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import logging #TODO be more precise
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#import pdb
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class probe(object):
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""""
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An atomic measurment
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Consists of name, value and unit. Unit is optional, althought when
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available it is highly recommended to state it; bd default it is set
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to "".
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"""
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def __init__(self, name, value, unit=""):
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self.name = name
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self.time = time()
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self.value = value
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self.unit = unit
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class survey(object):
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"""
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A survey skeleton - a survey is a probe container.
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Inherit from this class if you want to create your on Survey.
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"Implement" update by any means.
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"""
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def __init__(self):
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self.probe = [] #just to let you know
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self.update()
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self.name = 'Generic Survey'
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def update(self):
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"""
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Updates the list of probes
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Empty list of probes first and fill it with new ones afterwards
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"""
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pass
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class display(object):
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"""
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A display skeleton - a display updates and displays surveys
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Inherit from this class if you want to create your own display
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Implement display.
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"""
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def __init__(self):
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self.survey = []
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def update(self):
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for s in self.survey:
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s.update()
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def display(self):
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"""
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Displays self.survey items
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Don't forget to add some surveys first and update them as needed
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"""
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pass
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class surveyLoad(survey):
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""" Surveys unix load average """
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def __init__(self):
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super(surveyLoad,self).__init__() #call superconstructor
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self.name = 'Load Survey'
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def update(self):
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self.probe = []
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try:
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self.load = getloadavg()
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self.probe.append(probe('lastminute',self.load[0]))
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self.probe.append(probe('last5minute',self.load[1]))
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self.probe.append(probe('last15minute',self.load[2]))
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except Exception, ex:
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logging.exception("Error ocurred while probing %s" % self.__class__.__name__)
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pass
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class surveyFree(survey):
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#TODO it's just a quick hack; might not work too well
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""" Primitive memory survey"""
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def __init__(self):
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super(surveyFree,self).__init__()
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self.name = 'Simple Memory Survey'
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def update(self):
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self.probe = []
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try:
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f = open('/proc/meminfo', "r")
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self.probe.append(self.parseline(f.next()))
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self.probe.append(self.parseline(f.next()))
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f.next() #skip Buffer
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self.probe.append(self.parseline(f.next()))
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f.close()
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self.probe.append(probe("Effective free memory",
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self.probe[1].value + self.probe[2].value, 'kb'))
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except Exception, ex:
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logging.exception("Error ocurred while probing %s" % self.__class__.__name__)
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pass
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def parseline(self, memline):
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tmp = memline.partition(' ')
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name = tmp[0].rstrip(':')
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tmp = tmp[2].lstrip(' ').partition(' ')
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value = int(tmp[0])
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unit = tmp[2].rstrip('\n')
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return probe(name,value,unit)
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class displaycli(display):
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""" "Dumps" survey to standard out """
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def display(self):
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for s in self.survey:
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s.update()
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print "Name: %s" % s.name
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for p in s.probe:
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print "%s \t%s %s" % (p.name,p.value,p.unit)
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print ""
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if __name__ == "__main__":
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dis = displaycli()
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dis.survey.append(surveyLoad())
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dis.survey.append(surveyLoad())
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dis.survey.append(surveyFree())
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dis.display()
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#pdb.set_trace()
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