class Meter(object):
def __init__(self, average_class=EWMA):
self.counter = Atomic(0)
self.start_time = time.time()
self.m1_rate = EWMA.m1()
self.m5_rate = EWMA.m5()
self.m15_rate = EWMA.m15()
self.task = PeriodicTask(interval=average_class.INTERVAL, target=self.tick)
self.task.start()
@property
def count(self):
return self.counter.value
def clear(self):
self.counter.value = 0
self.start_time = time.time()
self.m1_rate.clear()
self.m5_rate.clear()
self.m15_rate.clear()
def mark(self, value=1):
with self.counter:
self.counter.value += value
self.m1_rate.update(value)
self.m5_rate.update(value)
self.m15_rate.update(value)
def tick(self):
self.m1_rate.tick()
self.m5_rate.tick()
self.m15_rate.tick()
@property
def one_minute_rate(self):
return self.m1_rate.rate
@property
def five_minute_rate(self):
return self.m5_rate.rate
@property
def fifteen_minute_rate(self):
return self.m15_rate.rate
@property
def mean_rate(self):
if self.counter.value == 0:
return 0.0
else:
elapsed = time.time() - self.start_time
return self.counter.value / elapsed
def stop(self):
self.task.stop()
class Meter(object):
"""A meter measures the rate of events over time (e.g., "requests per second").
In addition to the mean rate, you can also track 1, 5 and 15 minutes moving averages ::
meter = Metrology.meter('requests')
meter.mark()
meter.count
"""
def __init__(self, average_class=EWMA):
self.counter = Atomic(0)
self.start_time = time()
self.m1_rate = EWMA.m1()
self.m5_rate = EWMA.m5()
self.m15_rate = EWMA.m15()
self.task = PeriodicTask(interval=average_class.INTERVAL,
target=self.tick)
self.task.start()
@property
def count(self):
"""Returns the total number of events that have been recorded."""
return self.counter.value
def clear(self):
self.counter.value = 0
self.start_time = time()
self.m1_rate.clear()
self.m5_rate.clear()
self.m15_rate.clear()
def mark(self, value=1):
"""Record an event with the meter. By default it will record one event.
:param value: number of event to record
"""
self.counter.update(lambda v: v + value)
self.m1_rate.update(value)
self.m5_rate.update(value)
self.m15_rate.update(value)
def tick(self):
self.m1_rate.tick()
self.m5_rate.tick()
self.m15_rate.tick()
@property
def one_minute_rate(self):
"""Returns the one-minute average rate."""
return self.m1_rate.rate
@property
def five_minute_rate(self):
"""Returns the five-minute average rate."""
return self.m5_rate.rate
@property
def fifteen_minute_rate(self):
"""Returns the fifteen-minute average rate."""
return self.m15_rate.rate
@property
def mean_rate(self):
"""Returns the mean rate of the events since the start of the process."""
if self.counter.value == 0:
return 0.0
else:
elapsed = time() - self.start_time
return self.counter.value / elapsed
def stop(self):
self.task.stop()