# -*- coding: utf-8 -*- {{{
# vim: set fenc=utf-8 ft=python sw=4 ts=4 sts=4 et:
#
# Copyright 2019, Battelle Memorial Institute.
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# Licensed under the Apache License, Version 2.0 (the "License");
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import random
from weakref import WeakValueDictionary
from gevent.event import AsyncResult
import sys
from datetime import datetime
__all__ = ['counter', 'ResultsDictionary']
class AsyncResult(AsyncResult):
__slots__ = AsyncResult.__slots__ + ('ident',)
[docs]def counter(start=None, minimum=0, maximum=sys.maxsize-1):
#count = random.randint(minimum, maximum) if start is None else start
count = int(datetime.now().timestamp()) if start is None else start
while True:
yield count
count += 1
if count >= maximum:
count = int(datetime.now().timestamp())
[docs]class ResultsDictionary(WeakValueDictionary):
def __init__(self):
WeakValueDictionary.__init__(self)
self._counter = counter()
[docs] def pop(self, key, *args):
if isinstance(key, bytes):
key = key.decode("utf-8")
return WeakValueDictionary.pop(self, key, *args)
def __contains__(self, key):
if isinstance(key, bytes):
key = key.decode("utf-8")
return WeakValueDictionary.__contains__(self, key)
def __getitem__(self, key):
if isinstance(key, bytes):
key = key.decode("utf-8")
return WeakValueDictionary.__getitem__(self, key)
[docs] def get(self, key, default=None):
if isinstance(key, bytes):
key = key.decode("utf-8")
return WeakValueDictionary.get(self, key, default=default)
def __next__(self):
result = AsyncResult()
result.ident = ident = '%f.%f' % (next(self._counter), hash(result))
self[ident] = result
return result