105 lines
2.6 KiB
Python
105 lines
2.6 KiB
Python
"""AsyncIO support for zmq
|
|
|
|
Requires asyncio and Python 3.
|
|
"""
|
|
|
|
# Copyright (c) PyZMQ Developers.
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
import zmq as _zmq
|
|
from zmq import _future
|
|
|
|
# TODO: support trollius for Legacy Python? (probably not)
|
|
|
|
import asyncio
|
|
from asyncio import SelectorEventLoop, Future
|
|
try:
|
|
import selectors
|
|
except ImportError:
|
|
from asyncio import selectors # py33
|
|
|
|
|
|
class _AsyncIO(object):
|
|
_Future = Future
|
|
_WRITE = selectors.EVENT_WRITE
|
|
_READ = selectors.EVENT_READ
|
|
|
|
def _default_loop(self):
|
|
return asyncio.get_event_loop()
|
|
|
|
class Poller(_AsyncIO, _future._AsyncPoller):
|
|
"""Poller returning asyncio.Future for poll results."""
|
|
def _watch_raw_socket(self, loop, socket, evt, f):
|
|
"""Schedule callback for a raw socket"""
|
|
if evt & self._READ:
|
|
loop.add_reader(socket, lambda *args: f())
|
|
if evt & self._WRITE:
|
|
loop.add_writer(socket, lambda *args: f())
|
|
|
|
def _unwatch_raw_sockets(self, loop, *sockets):
|
|
"""Unschedule callback for a raw socket"""
|
|
for socket in sockets:
|
|
loop.remove_reader(socket)
|
|
loop.remove_writer(socket)
|
|
|
|
|
|
class Socket(_AsyncIO, _future._AsyncSocket):
|
|
"""Socket returning asyncio Futures for send/recv/poll methods."""
|
|
|
|
_poller_class = Poller
|
|
|
|
def _init_io_state(self):
|
|
"""initialize the ioloop event handler"""
|
|
self.io_loop.add_reader(self._fd, lambda : self._handle_events(0, 0))
|
|
|
|
def _clear_io_state(self):
|
|
"""clear any ioloop event handler
|
|
|
|
called once at close
|
|
"""
|
|
self.io_loop.remove_reader(self._fd)
|
|
|
|
Poller._socket_class = Socket
|
|
|
|
class Context(_zmq.Context):
|
|
"""Context for creating asyncio-compatible Sockets"""
|
|
_socket_class = Socket
|
|
|
|
# avoid sharing instance with base Context class
|
|
_instance = None
|
|
|
|
|
|
class ZMQEventLoop(SelectorEventLoop):
|
|
"""DEPRECATED: AsyncIO eventloop using zmq_poll.
|
|
|
|
pyzmq sockets should work with any asyncio event loop as of pyzmq 17.
|
|
"""
|
|
def __init__(self, selector=None):
|
|
_deprecated()
|
|
return super(ZMQEventLoop, self).__init__(selector)
|
|
|
|
|
|
_loop = None
|
|
|
|
|
|
def _deprecated():
|
|
if _deprecated.called:
|
|
return
|
|
_deprecated.called = True
|
|
import warnings
|
|
warnings.warn("ZMQEventLoop and zmq.asyncio.install are deprecated in pyzmq 17. Special eventloop integration is no longer needed.", DeprecationWarning, stacklevel=3)
|
|
_deprecated.called = False
|
|
|
|
|
|
def install():
|
|
"""DEPRECATED: No longer needed in pyzmq 17"""
|
|
_deprecated()
|
|
|
|
|
|
__all__ = [
|
|
'Context',
|
|
'Socket',
|
|
'Poller',
|
|
'ZMQEventLoop',
|
|
'install',
|
|
]
|