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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) typedef int GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
import sys
def run_once():
"""
A helper that takes one trip through the event-loop to process any
pending Futures. This is a no-op for Twisted, because you don't
need to use the event-loop to get callbacks to happen in Twisted.
"""
import txaio
if txaio.using_twisted:
return
try:
import asyncio
if sys.version_info >= (3, 7):
# https://github.com/crossbario/txaio/issues/139
from _asyncio_test_utils import run_once as _run_once
else:
from asyncio.test_utils import run_once as _run_once
return _run_once(txaio.config.loop or _get_loop())
except ImportError:
import trollius as asyncio
# let any trollius import error out; if we're not using
# twisted, and have no asyncio *and* no trollius, that's a
# problem.
# copied from asyncio.testutils because trollius has no
# testutils"
# just like modern asyncio.testutils.run_once does it...
loop = asyncio.get_event_loop()
loop.stop()
loop.run_forever()
asyncio.gather(*asyncio.Task.all_tasks())
def _get_loop():
import asyncio
try:
return asyncio.get_event_loop()
except RuntimeError:
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
return loop
def _await(future):
"""
Essentially just a way to call "run_until_complete" that becomes a
no-op if we're using Twisted.
"""
import txaio
if txaio.using_twisted:
return
try:
import asyncio
except ImportError:
import trollius as asyncio
asyncio.get_event_loop().run_until_complete(future)
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