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from __future__ import absolute_import
class Quota(object):
"""An upper or lower bound for metrics"""
def __init__(self, bound, is_upper):
self._bound = bound
self._upper = is_upper
@staticmethod
def upper_bound(upper_bound):
return Quota(upper_bound, True)
@staticmethod
def lower_bound(lower_bound):
return Quota(lower_bound, False)
def is_upper_bound(self):
return self._upper
@property
def bound(self):
return self._bound
def is_acceptable(self, value):
return ((self.is_upper_bound() and value <= self.bound) or
(not self.is_upper_bound() and value >= self.bound))
def __hash__(self):
prime = 31
result = prime + self.bound
return prime * result + self.is_upper_bound()
def __eq__(self, other):
if self is other:
return True
return (type(self) == type(other) and
self.bound == other.bound and
self.is_upper_bound() == other.is_upper_bound())
def __ne__(self, other):
return not self.__eq__(other)
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