def save_sample(self,
metric,
value,
timestamp=None,
tags=None,
hostname=None,
device_name=None):
"""Save a simple sample, evict old values if needed
"""
from util import cast_metric_val
if timestamp is None:
timestamp = time.time()
if metric not in self._sample_store:
raise CheckException(
"Saving a sample for an undefined metric: %s" % metric)
try:
value = cast_metric_val(value)
except ValueError as ve:
raise NaN(ve)
# Sort and validate tags
if tags is not None:
if type(tags) not in [type([]), type(())]:
raise CheckException("Tags must be a list or tuple of strings")
else:
tags = tuple(sorted(tags))
# Data eviction rules
key = (tags, device_name)
if self.is_gauge(metric):
self._sample_store[metric][key] = ((timestamp, value, hostname,
device_name), )
elif self.is_counter(metric):
if self._sample_store[metric].get(key) is None:
self._sample_store[metric][key] = [(timestamp, value, hostname,
device_name)]
else:
self._sample_store[metric][key] = self._sample_store[metric][
key][-1:] + [(timestamp, value, hostname, device_name)]
else:
raise CheckException(
"%s must be either gauge or counter, skipping sample at %s" %
(metric, time.ctime(timestamp)))
if self.is_gauge(metric):
# store[metric][tags] = (ts, val) - only 1 value allowed
assert len(self._sample_store[metric]
[key]) == 1, self._sample_store[metric]
elif self.is_counter(metric):
assert len(self._sample_store[metric][key]) in (
1, 2), self._sample_store[metric]
def save_sample(self, metric, value, timestamp=None, tags=None, hostname=None, device_name=None):
"""Save a simple sample, evict old values if needed
"""
from util import cast_metric_val
if timestamp is None:
timestamp = time.time()
if metric not in self._sample_store:
raise CheckException("Saving a sample for an undefined metric: %s" % metric)
try:
value = cast_metric_val(value)
except ValueError, ve:
raise NaN(ve)
def save_sample(self, metric, value, timestamp=None, tags=None, hostname=None, device_name=None):
"""Save a simple sample, evict old values if needed
"""
from util import cast_metric_val
if timestamp is None:
timestamp = time.time()
if metric not in self._sample_store:
raise CheckException("Saving a sample for an undefined metric: %s" % metric)
try:
value = cast_metric_val(value)
except ValueError, ve:
raise NaN(ve)
def save_sample(self, metric, value, timestamp=None, tags=None, hostname=None, device_name=None):
"""Save a simple sample, evict old values if needed
"""
from util import cast_metric_val
if timestamp is None:
timestamp = time.time()
if metric not in self._sample_store:
raise CheckException("Saving a sample for an undefined metric: %s" % metric)
try:
value = cast_metric_val(value)
except ValueError as ve:
raise NaN(ve)
# Sort and validate tags
if tags is not None:
if type(tags) not in [type([]), type(())]:
raise CheckException("Tags must be a list or tuple of strings")
else:
tags = tuple(sorted(tags))
# Data eviction rules
key = (tags, device_name)
if self.is_gauge(metric):
self._sample_store[metric][key] = ((timestamp, value, hostname, device_name),)
elif self.is_counter(metric):
if self._sample_store[metric].get(key) is None:
self._sample_store[metric][key] = [(timestamp, value, hostname, device_name)]
else:
self._sample_store[metric][key] = self._sample_store[metric][key][-1:] + [
(timestamp, value, hostname, device_name)
]
else:
raise CheckException(
"%s must be either gauge or counter, skipping sample at %s" % (metric, time.ctime(timestamp))
)
if self.is_gauge(metric):
# store[metric][tags] = (ts, val) - only 1 value allowed
assert len(self._sample_store[metric][key]) == 1, self._sample_store[metric]
elif self.is_counter(metric):
assert len(self._sample_store[metric][key]) in (1, 2), self._sample_store[metric]
