import threading
import time
import traceback
-from typing import Any, Callable, Optional
import warnings
+from typing import Any, Callable, Optional
# This module is commonly used by others in here and should avoid
# taking any unnecessary dependencies back on them.
import exceptions
-
logger = logging.getLogger(__name__)
return wrapper_invocation_logged
-def rate_limited(
- n_calls: int, *, per_period_in_seconds: float = 1.0
-) -> Callable:
+def rate_limited(n_calls: int, *, per_period_in_seconds: float = 1.0) -> Callable:
"""Limit invocation of a wrapped function to n calls per period.
Thread safe. In testing this was relatively fair with multiple
threads using it though that hasn't been measured.
logger.debug(f'@{time.time()}> calling it...')
ret = func(*args, **kargs)
last_invocation_timestamp[0] = time.time()
- logger.debug(
- f'@{time.time()}> Last invocation <- {last_invocation_timestamp[0]}'
- )
+ logger.debug(f'@{time.time()}> Last invocation <- {last_invocation_timestamp[0]}')
cv.notify()
return ret
@functools.wraps(func)
def wrapper_debug_count_calls(*args, **kwargs):
wrapper_debug_count_calls.num_calls += 1
- msg = (
- f"Call #{wrapper_debug_count_calls.num_calls} of {func.__name__!r}"
- )
+ msg = f"Call #{wrapper_debug_count_calls.num_calls} of {func.__name__!r}"
print(msg)
logger.info(msg)
return func(*args, **kwargs)
- wrapper_debug_count_calls.num_calls = 0
+ wrapper_debug_count_calls.num_calls = 0 # type: ignore
return wrapper_debug_count_calls
@functools.wraps(func)
def wrapper_delay(*args, **kwargs):
if when & DelayWhen.BEFORE_CALL:
- logger.debug(
- f"@delay for {seconds}s BEFORE_CALL to {func.__name__}"
- )
+ logger.debug(f"@delay for {seconds}s BEFORE_CALL to {func.__name__}")
time.sleep(seconds)
retval = func(*args, **kwargs)
if when & DelayWhen.AFTER_CALL:
- logger.debug(
- f"@delay for {seconds}s AFTER_CALL to {func.__name__}"
- )
+ logger.debug(f"@delay for {seconds}s AFTER_CALL to {func.__name__}")
time.sleep(seconds)
return retval
def __call__(self, *args, **kwargs):
"""Returns a single instance of decorated class"""
- logger.debug(
- f"@singleton returning global instance of {self.__wrapped__.__name__}"
- )
+ logger.debug(f"@singleton returning global instance of {self.__wrapped__.__name__}")
if self._instance is None:
self._instance = self.__wrapped__(*args, **kwargs)
return self._instance
cache_key = args + tuple(kwargs.items())
if cache_key not in wrapper_memoized.cache:
value = func(*args, **kwargs)
- logger.debug(
- f"Memoizing {cache_key} => {value} for {func.__name__}"
- )
+ logger.debug(f"Memoizing {cache_key} => {value} for {func.__name__}")
wrapper_memoized.cache[cache_key] = value
else:
logger.debug(f"Returning memoized value for {func.__name__}")
return wrapper_memoized.cache[cache_key]
- wrapper_memoized.cache = dict()
+ wrapper_memoized.cache = dict() # type: ignore
return wrapper_memoized
self.__limit = kwargs.pop("timeout", self.__limit)
self.__queue = multiprocessing.Queue(1)
args = (self.__queue, self.__function) + args
- self.__process = multiprocessing.Process(
- target=_target, args=args, kwargs=kwargs
- )
+ self.__process = multiprocessing.Process(target=_target, args=args, kwargs=kwargs)
self.__process.daemon = True
self.__process.start()
if self.__limit is not None:
@functools.wraps(function)
def new_function(*args, **kwargs):
- timeout_wrapper = _Timeout(
- function, timeout_exception, error_message, seconds
- )
+ timeout_wrapper = _Timeout(function, timeout_exception, error_message, seconds)
return timeout_wrapper(*args, **kwargs)
return new_function
return decorate
-class non_reentrant_code(object):
- def __init__(self):
- self._lock = threading.RLock
- self._entered = False
-
- def __call__(self, f):
- def _gatekeeper(*args, **kwargs):
- with self._lock:
- if self._entered:
- return
- self._entered = True
- f(*args, **kwargs)
- self._entered = False
+def synchronized(lock):
+ def wrap(f):
+ @functools.wraps(f)
+ def _gatekeeper(*args, **kw):
+ lock.acquire()
+ try:
+ return f(*args, **kw)
+ finally:
+ lock.release()
return _gatekeeper
-
-class rlocked(object):
- def __init__(self):
- self._lock = threading.RLock
- self._entered = False
-
- def __call__(self, f):
- def _gatekeeper(*args, **kwargs):
- with self._lock:
- if self._entered:
- return
- self._entered = True
- f(*args, **kwargs)
- self._entered = False
-
- return _gatekeeper
+ return wrap
def call_with_sample_rate(sample_rate: float) -> Callable:
if random.uniform(0, 1) < sample_rate:
return f(*args, **kwargs)
else:
- logger.debug(
- f"@call_with_sample_rate skipping a call to {f.__name__}"
- )
+ logger.debug(f"@call_with_sample_rate skipping a call to {f.__name__}")
return _call_with_sample_rate