137 lines
4 KiB
Python
137 lines
4 KiB
Python
|
# coding: utf-8
|
|||
|
|
"""tornado IOLoop API with zmq compatibility
|
|||
|
|
|
|||
|
|
This module is deprecated in pyzmq 17.
|
|||
|
|
To use zmq with tornado,
|
|||
|
|
eventloop integration is no longer required
|
|||
|
|
and tornado itself should be used.
|
|||
|
|
"""
|
|||
|
|
|
|||
|
|
# Copyright (C) PyZMQ Developers
|
|||
|
|
# Distributed under the terms of the Modified BSD License.
|
|||
|
|
|
|||
|
|
from __future__ import absolute_import, division, with_statement
|
|||
|
|
|
|||
|
|
import time
|
|||
|
|
import warnings
|
|||
|
|
|
|||
|
|
try:
|
|||
|
|
import tornado
|
|||
|
|
from tornado.log import gen_log
|
|||
|
|
from tornado import ioloop
|
|||
|
|
if not hasattr(ioloop.IOLoop, 'configurable_default'):
|
|||
|
|
raise ImportError("Tornado too old: %s" % getattr(tornado, 'version', 'unknown'))
|
|||
|
|
except ImportError:
|
|||
|
|
from .minitornado import ioloop
|
|||
|
|
from .minitornado.log import gen_log
|
|||
|
|
|
|||
|
|
PeriodicCallback = ioloop.PeriodicCallback
|
|||
|
|
|
|||
|
|
|
|||
|
|
class DelayedCallback(PeriodicCallback):
|
|||
|
|
"""Schedules the given callback to be called once.
|
|||
|
|
|
|||
|
|
The callback is called once, after callback_time milliseconds.
|
|||
|
|
|
|||
|
|
`start` must be called after the DelayedCallback is created.
|
|||
|
|
|
|||
|
|
The timeout is calculated from when `start` is called.
|
|||
|
|
"""
|
|||
|
|
def __init__(self, callback, callback_time, io_loop=None):
|
|||
|
|
# PeriodicCallback require callback_time to be positive
|
|||
|
|
warnings.warn("""DelayedCallback is deprecated.
|
|||
|
|
Use loop.add_timeout instead.""", DeprecationWarning)
|
|||
|
|
callback_time = max(callback_time, 1e-3)
|
|||
|
|
super(DelayedCallback, self).__init__(callback, callback_time, io_loop)
|
|||
|
|
|
|||
|
|
def start(self):
|
|||
|
|
"""Starts the timer."""
|
|||
|
|
self._running = True
|
|||
|
|
self._firstrun = True
|
|||
|
|
self._next_timeout = time.time() + self.callback_time / 1000.0
|
|||
|
|
self.io_loop.add_timeout(self._next_timeout, self._run)
|
|||
|
|
|
|||
|
|
def _run(self):
|
|||
|
|
if not self._running: return
|
|||
|
|
self._running = False
|
|||
|
|
try:
|
|||
|
|
self.callback()
|
|||
|
|
except Exception:
|
|||
|
|
gen_log.error("Error in delayed callback", exc_info=True)
|
|||
|
|
|
|||
|
|
|
|||
|
|
def _deprecated():
|
|||
|
|
if _deprecated.called:
|
|||
|
|
return
|
|||
|
|
_deprecated.called = True
|
|||
|
|
warnings.warn("zmq.eventloop.ioloop is deprecated in pyzmq 17."
|
|||
|
|
" pyzmq now works with default tornado and asyncio eventloops.",
|
|||
|
|
DeprecationWarning, stacklevel=3)
|
|||
|
|
_deprecated.called = False
|
|||
|
|
|
|||
|
|
|
|||
|
|
# resolve 'true' default loop
|
|||
|
|
if '.minitornado.' in ioloop.__name__:
|
|||
|
|
from ._deprecated import ZMQIOLoop as _IOLoop
|
|||
|
|
else:
|
|||
|
|
_IOLoop = ioloop.IOLoop
|
|||
|
|
while _IOLoop.configurable_default() is not _IOLoop:
|
|||
|
|
_IOLoop = _IOLoop.configurable_default()
|
|||
|
|
|
|||
|
|
|
|||
|
|
class ZMQIOLoop(_IOLoop):
|
|||
|
|
"""DEPRECATED: No longer needed as of pyzmq-17
|
|||
|
|
|
|||
|
|
PyZMQ tornado integration now works with the default :mod:`tornado.ioloop.IOLoop`.
|
|||
|
|
"""
|
|||
|
|
|
|||
|
|
def __init__(self, *args, **kwargs):
|
|||
|
|
_deprecated()
|
|||
|
|
# super is object, which takes no args
|
|||
|
|
return super(ZMQIOLoop, self).__init__()
|
|||
|
|
|
|||
|
|
@classmethod
|
|||
|
|
def instance(cls, *args, **kwargs):
|
|||
|
|
"""Returns a global `IOLoop` instance.
|
|||
|
|
|
|||
|
|
Most applications have a single, global `IOLoop` running on the
|
|||
|
|
main thread. Use this method to get this instance from
|
|||
|
|
another thread. To get the current thread's `IOLoop`, use `current()`.
|
|||
|
|
"""
|
|||
|
|
# install ZMQIOLoop as the active IOLoop implementation
|
|||
|
|
# when using tornado 3
|
|||
|
|
ioloop.IOLoop.configure(cls)
|
|||
|
|
_deprecated()
|
|||
|
|
loop = ioloop.IOLoop.instance(*args, **kwargs)
|
|||
|
|
return loop
|
|||
|
|
|
|||
|
|
@classmethod
|
|||
|
|
def current(cls, *args, **kwargs):
|
|||
|
|
"""Returns the current thread’s IOLoop.
|
|||
|
|
"""
|
|||
|
|
# install ZMQIOLoop as the active IOLoop implementation
|
|||
|
|
# when using tornado 3
|
|||
|
|
ioloop.IOLoop.configure(cls)
|
|||
|
|
_deprecated()
|
|||
|
|
loop = ioloop.IOLoop.current(*args, **kwargs)
|
|||
|
|
return loop
|
|||
|
|
|
|||
|
|
|
|||
|
|
# public API name
|
|||
|
|
IOLoop = ZMQIOLoop
|
|||
|
|
|
|||
|
|
|
|||
|
|
def install():
|
|||
|
|
"""DEPRECATED
|
|||
|
|
|
|||
|
|
pyzmq 17 no longer needs any special integration for tornado.
|
|||
|
|
"""
|
|||
|
|
_deprecated()
|
|||
|
|
ioloop.IOLoop.configure(ZMQIOLoop)
|
|||
|
|
|
|||
|
|
|
|||
|
|
# if minitornado is used, fallback on deprecated ZMQIOLoop, install implementations
|
|||
|
|
if '.minitornado.' in ioloop.__name__:
|
|||
|
|
from ._deprecated import ZMQIOLoop, install, IOLoop
|
|||
|
|
|