74 lines
2.0 KiB
Python
74 lines
2.0 KiB
Python
from __future__ import absolute_import
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import sys
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import gevent
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import gevent.event
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import gevent.queue
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from pykka import Actor, Future, Timeout
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__all__ = ['GeventActor', 'GeventFuture']
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class GeventFuture(Future):
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"""
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:class:`GeventFuture` implements :class:`pykka.Future` for use with
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:class:`GeventActor`.
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It encapsulates a :class:`gevent.event.AsyncResult` object which may be
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used directly, though it will couple your code with gevent.
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"""
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#: The encapsulated :class:`gevent.event.AsyncResult`
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async_result = None
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def __init__(self, async_result=None):
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super(GeventFuture, self).__init__()
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if async_result is None:
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async_result = gevent.event.AsyncResult()
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self.async_result = async_result
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def get(self, timeout=None):
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try:
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return super(GeventFuture, self).get(timeout=timeout)
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except NotImplementedError:
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pass
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try:
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return self.async_result.get(timeout=timeout)
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except gevent.Timeout as e:
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raise Timeout(e)
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def set(self, value=None):
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assert not self.async_result.ready(), 'value has already been set'
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self.async_result.set(value)
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def set_exception(self, exc_info=None):
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assert exc_info is None or len(exc_info) == 3
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exc_info = exc_info or sys.exc_info()
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self.async_result.set_exception(exc_info[1], exc_info=exc_info)
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class GeventActor(Actor):
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"""
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:class:`GeventActor` implements :class:`pykka.Actor` using the `gevent
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<http://www.gevent.org/>`_ library. gevent is a coroutine-based Python
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networking library that uses greenlet to provide a high-level synchronous
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API on top of libevent event loop.
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This is a very fast implementation.
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"""
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@staticmethod
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def _create_actor_inbox():
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return gevent.queue.Queue()
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@staticmethod
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def _create_future():
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return GeventFuture()
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def _start_actor_loop(self):
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gevent.Greenlet.spawn(self._actor_loop)
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