Source code for actors.utils
# -*- coding: utf-8 -*-
#
# Copyright 2015 Thomas Amland
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from collections import namedtuple
from actors.actor import Actor
[docs]class AsyncCountDownLatch(Actor):
CountDown = object()
Done = object()
Start = namedtuple('Start', ['count'])
def __init__(self):
self._count = -1
self._reply_to = None
[docs] def receive(self, message):
if message is AsyncCountDownLatch.CountDown:
self._count -= 1
if self._count == 0:
self._reply_to.tell(AsyncCountDownLatch.Done)
elif type(message) is AsyncCountDownLatch.Start:
self._count = message.count
self._reply_to = self.context.sender