84 lines
2.4 KiB
Python
Executable File
84 lines
2.4 KiB
Python
Executable File
#
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# rate_model.py
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#
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# This source file is part of the FoundationDB open source project
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#
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# Copyright 2013-2020 Apple Inc. and the FoundationDB project authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import numpy
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class RateModel:
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def __init__(self):
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pass
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def get_rate(self, time):
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pass
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class FixedRateModel(RateModel):
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def __init__(self, rate):
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RateModel.__init__(self)
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self.rate = rate
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def get_rate(self, time):
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return self.rate
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class UnlimitedRateModel(FixedRateModel):
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def __init__(self):
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self.rate = 1e9
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class IntervalRateModel(RateModel):
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def __init__(self, intervals):
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self.intervals = sorted(intervals)
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def get_rate(self, time):
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if len(self.intervals) == 0 or time < self.intervals[0][0]:
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return 0
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target_interval = len(self.intervals)-1
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for i in range(1, len(self.intervals)):
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if time < self.intervals[i][0]:
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target_interval = i-1
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break
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self.intervals = self.intervals[target_interval:]
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return self.intervals[0][1]
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class SawtoothRateModel(RateModel):
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def __init__(self, low, high, frequency):
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self.low = low
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self.high = high
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self.frequency = frequency
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def get_rate(self, time):
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if int(2*time/self.frequency) % 2 == 0:
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return self.low
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else:
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return self.high
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class DistributionRateModel(RateModel):
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def __init__(self, distribution, frequency):
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self.distribution = distribution
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self.frequency = frequency
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self.last_change = 0
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self.rate = None
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def get_rate(self, time):
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if self.frequency == 0 or int((time - self.last_change) / self.frequency) > int(self.last_change / self.frequency) or self.rate is None:
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self.last_change = time
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self.rate = self.distribution()
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return self.rate
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