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65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Bridges between the Twisted package and Tornado."""
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import sys
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from twisted.internet.defer import Deferred # type: ignore
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from twisted.python import failure # type: ignore
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from tornado.concurrent import Future, future_set_exc_info
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from tornado import gen
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import typing # noqa: F401
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def install() -> None:
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"""Install ``AsyncioSelectorReactor`` as the default Twisted reactor.
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.. deprecated:: 5.1
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This function is provided for backwards compatibility; code
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that does not require compatibility with older versions of
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Tornado should use
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``twisted.internet.asyncioreactor.install()`` directly.
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.. versionchanged:: 6.0.3
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In Tornado 5.x and before, this function installed a reactor
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based on the Tornado ``IOLoop``. When that reactor
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implementation was removed in Tornado 6.0.0, this function was
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removed as well. It was restored in Tornado 6.0.3 using the
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``asyncio`` reactor instead.
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"""
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from twisted.internet.asyncioreactor import install # type: ignore
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install()
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if hasattr(gen.convert_yielded, "register"):
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@gen.convert_yielded.register(Deferred)
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def _(d: Deferred) -> Future:
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f = Future() # type: Future[typing.Any]
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def errback(failure: failure.Failure) -> None:
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try:
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failure.raiseException()
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# Should never happen, but just in case
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raise Exception("errback called without error")
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except:
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future_set_exc_info(f, sys.exc_info())
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d.addCallbacks(f.set_result, errback)
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return f
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