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from __future__ import unicode_literals
from timeit import default_timer
from .decorator import decorate
class ExceptionCounter(object):
def __init__(self, counter, exception):
self._counter = counter
self._exception = exception
def __enter__(self):
pass
def __exit__(self, typ, value, traceback):
if isinstance(value, self._exception):
self._counter.inc()
def __call__(self, f):
def wrapped(func, *args, **kwargs):
with self:
return func(*args, **kwargs)
return decorate(f, wrapped)
class InprogressTracker(object):
def __init__(self, gauge):
self._gauge = gauge
def __enter__(self):
self._gauge.inc()
def __exit__(self, typ, value, traceback):
self._gauge.dec()
def __call__(self, f):
def wrapped(func, *args, **kwargs):
with self:
return func(*args, **kwargs)
return decorate(f, wrapped)
class Timer(object):
def __init__(self, callback):
self._callback = callback
def _new_timer(self):
return self.__class__(self._callback)
def __enter__(self):
self._start = default_timer()
def __exit__(self, typ, value, traceback):
# Time can go backwards.
duration = max(default_timer() - self._start, 0)
self._callback(duration)
def __call__(self, f):
def wrapped(func, *args, **kwargs):
# Obtaining new instance of timer every time
# ensures thread safety and reentrancy.
with self._new_timer():
return func(*args, **kwargs)
return decorate(f, wrapped)