def getTargetCycleTime(self, context):
"""Return cycletime of basis datasources."""
datasources_by_varname = {}
for template in context.getRRDTemplates():
for datasource in template.datasources():
for datapoint in datasource.datapoints():
datasources_by_varname[datapoint.id] = datasource
datasources_by_varname[datapoint.name()] = datasource
cycletimes = set()
for varname in getVarNames(self.expression):
datasource = datasources_by_varname.get(varname)
if not datasource:
continue
# Some types of datasources such as PythonDataSource and
# UCSDataSource implement a getCycleTime(context) method that
# provides a context-specific interval instead of the static
# cycletime property used by most other types of datasources. We
# want to prefer the getCycleTime method's result to the cycletime
# value because it will actually be the real collection interval
# of the basis datasource.
if datasource.aqBaseHasAttr("getCycleTime"):
cycletimes.add(int(datasource.getCycleTime(context)))
elif datasource.aqBaseHasAttr("cycletime"):
cycletimes.add(int(datasource.cycletime))
if cycletimes:
# It's common for multiple basis datapoints to be used in the
# expression. In cases where different datapoints in the
# expression have different intervals, we'll choose the shortest
# interval.
return min(cycletimes)
def params(cls, datasource, context):
targetInfos = []
# add an id->contents map for each component/device
for member in dotTraverse(context, datasource.targetMethod or '') or []:
targetInfos.append(targetInfo(member))
targetArgValues = []
for datapoint in datasource.datapoints():
if isinstance(datapoint, AggregatingDataPoint):
for att in getVarNames(datapoint.arguments.strip()):
targetArgValues.append(dotTraverse(context, att))
else:
log.error("datasource %s has a datapoint of the wrong type %s" % (datasource, datapoint))
# should be only datapoint, so ...
break
zDebug = context.getZ('zDatasourceDebugLogging')
return dict(
targetDatapoints = [(datasource.targetDataSource, datasource.targetDataPoint,
datasource.targetRRA or 'AVERAGE')],
targetArgValues=[tuple(targetArgValues)],
targets=targetInfos,
debug=datasource.debug or zDebug
)
def handleArguments(targetArgValues, dpargs):
tokens = dpargs.strip().split(',') if dpargs.strip() else []
arguments = []
for tok, x in izip(tokens, range(len(tokens))):
arguments.append(
targetArgValues[x] if getVarNames(tok) else tok.strip())
return arguments
def params(cls, datasource, context):
zDebug = context.getZ('zDatasourceDebugLogging')
config = {
'targets': [targetInfo(context)],
'expression': datasource.expression,
'debug': datasource.debug or zDebug,
'template': datasource.rrdTemplate().getPrimaryId()
}
attrs = {}
targetDataPoints = []
allDatapointsByVarName = {}
for dp in context.getRRDDataPoints():
allDatapointsByVarName[dp.id] = dp
allDatapointsByVarName[dp.name()] = dp
for att in getVarNames(datasource.expression):
if att in allDatapointsByVarName:
datapoint = allDatapointsByVarName[att]
targetDataPoints.append((datapoint.datasource().id, datapoint.id, 'AVERAGE'))
else:
value = dotTraverse(context, att)
if not CalculatedDataSourcePlugin.isPicklable(value):
log.error("Calculated Performance expression %s references "
"invalid attribute (unpicklable value) %s" %(datasource.expression, att))
return config
attrs[att] = value
if value is None:
log.warn(
"Calculated Performance expression %s references "
"the variable %s which is not in %s" % (
datasource.expression, att, allDatapointsByVarName.keys()))
config['obj_attrs'] = attrs
config['targetDatapoints'] = targetDataPoints
return config
def params(cls, datasource, context):
zDebug = context.getZ('zDatasourceDebugLogging')
config = {
'expression': datasource.expression,
'debug': datasource.debug or zDebug,
'template': datasource.rrdTemplate().getPrimaryId()}
attrs = {}
targetDatapoints = {}
# Keep track of all datapoints from all targets so we can avoid
# looking for an attribute when we have found a datapoint by name on
# an earlier target already.
combinedDatapoints = {}
# extraContents can contain paths to other objects that could have
# metrics or attributes.
allTargets = getExtraTargets(datasource.extraContexts, context)
allTargets.append(context)
# count down to the last target
hasMore = len(allTargets)
for target in allTargets:
hasMore -= 1
allDatapointsByVarName = {}
for dp in target.getRRDDataPoints():
allDatapointsByVarName[dp.id] = dp
allDatapointsByVarName[dp.name()] = dp
combinedDatapoints.update(allDatapointsByVarName)
for att in getVarNames(datasource.expression):
if att in allDatapointsByVarName:
datapoint = allDatapointsByVarName[att]
fqdpn = '%s_%s' % (datapoint.datasource().id, datapoint.id)
targetDatapoints[fqdpn] = (
datapoint.datasource().id,
datapoint.id,
'AVERAGE',
datasource.targetAsRate,
[targetInfo(target)])
elif att not in combinedDatapoints:
value = dotTraverse(target, att)
if not CalculatedDataSourcePlugin.isPicklable(value):
LOG.error(
"Calculated Performance expression %s references "
"invalid attribute (unpicklable value) %s",
datasource.expression, att)
return config
# Only store None if we finished and never found
# a more interesting value.
if value is not None:
attrs[att] = value
elif att not in attrs and not hasMore:
attrs[att] = value
LOG.warn(
"Calculated Performance expression %s references "
"the variable %s which is not in %s on the targets %s",
datasource.expression, att,
combinedDatapoints.keys(), allTargets)
config['obj_attrs'] = attrs
config['targetDatapoints'] = targetDatapoints.values()
return config
