def evaluateDataSourceExpression(self, context, propName, readablePropName):
"""
Return back a sane value from evaluation of an expression.
@paramter context: device or component object
@type context: device or component object
@paramter propName: name of the threshold property to evaluate
@type propName: string
@paramter readablePropName: property name for displaying in error messages
@type readablePropName: string
@returns: numeric
@rtype: numeric
"""
value = getattr(self, propName, None)
if value:
try:
express = "python:%s" % value
evaluated = talesEval(express, context)
value = evaluated
except:
msg= "User-supplied Python expression (%s) for %s caused error: %s" % (
value, readablePropName, self.dsnames)
log.error(msg)
raise pythonThresholdException(msg)
value = None
return nanToNone(value)
def evaluateDataSourceExpression(self, context, propName, readablePropName):
"""
Return back a sane value from evaluation of an expression.
@paramter context: device or component object
@type context: device or component object
@paramter propName: name of the threshold property to evaluate
@type propName: string
@paramter readablePropName: property name for displaying in error messages
@type readablePropName: string
@returns: numeric
@rtype: numeric
"""
value = getattr(self, propName, None)
if value:
try:
express = "python:%s" % value
evaluated = talesEval(express, context)
value = evaluated
except:
msg= "User-supplied Python expression (%s) for %s caused error: %s" % (
value, readablePropName, self.dsnames)
log.error(msg)
raise pythonThresholdException(msg)
value = None
return nanToNone(value)
def getPointval(self, context):
"""Build the point value for this threshold.
"""
pointval = None
if self.pointval:
try:
pointval = talesEval("python:" + self.pointval, context)
except:
msg= "User-supplied Python expression (%s) for point value caused error: %s" % \
( self.pointval, self.dsnames )
log.error(msg)
raise pythonThresholdException(msg)
pointval = None
return pointval
def getPointval(self, context):
"""Build the point value for this threshold.
"""
pointval = None
if self.pointval:
try:
pointval = talesEval("python:"+self.pointval, context)
except:
msg= "User-supplied Python expression (%s) for point value caused error: %s" % \
( self.pointval, self.dsnames )
log.error( msg )
raise pythonThresholdException(msg)
pointval = None
return pointval
def getHystK(self, context):
"""
"""
goodCount = 0
if self.goodCount:
try:
express = "python:%s" % self.goodCount
goodCount = talesEval(express, context)
except:
msg = ("User-supplied Python expression (%s) for "
"hysteresis K value caused error: %s") % (
self.goodCount, self.dsnames)
log.error(msg)
raise pythonThresholdException(msg)
goodCount = 0
return goodCount
def getHystM(self, context):
"""
"""
queueSize = 0
if self.queueSize:
try:
express = "python:%s" % self.queueSize
queueSize = talesEval(express, context)
except:
msg = ("User-supplied Python expression (%s) for "
"hysteresis M value caused error: %s") % (
self.queueSize, self.dsnames)
log.error(msg)
raise pythonThresholdException(msg)
queueSize = 0
return queueSize
def getMaxval(self, context):
"""Build the max value for this threshold.
"""
maxval = None
if self.maxval:
try:
express = "python:%s" % self.maxval
maxval = talesEval(express, context)
except:
msg = ("User-supplied Python expression (%s) for "
"maximum value caused error: %s") % (self.maxval,
self.dsnames)
log.error(msg)
raise pythonThresholdException(msg)
maxval = None
return nanToNone(maxval)