tornado.platform.twisted — Bridges between Twisted and Tornado¶

Bridges between the Twisted reactor and Tornado IOLoop.

This module lets you run applications and libraries written forTwisted in a Tornado application. It can be used in two modes,depending on which library’s underlying event loop you want to use.

This module has been tested with Twisted versions 11.0.0 and newer.

Twisted on Tornado¶

class tornado.platform.twisted.TornadoReactor(io_loop=None)[源代码]¶

Twisted reactor built on the Tornado IOLoop.

TornadoReactor implements the Twisted reactor interface on top ofthe Tornado IOLoop. To use it, simply call install at the beginningof the application:

import tornado.platform.twisted
tornado.platform.twisted.install()
from twisted.internet import reactor

When the app is ready to start, call IOLoop.current().start()instead of reactor.run().

It is also possible to create a non-global reactor by callingtornado.platform.twisted.TornadoReactor(ioloop). However, ifthe IOLoop and reactor are to be short-lived (such as those used inunit tests), additional cleanup may be required. Specifically, it isrecommended to call:

reactor.fireSystemEvent('shutdown')
reactor.disconnectAll()

before closing the IOLoop.


在 4.1 版更改: The io_loop argument is deprecated.

tornado.platform.twisted.install(_io_loop=None)[源代码]¶

Install this package as the default Twisted reactor.

install() must be called very early in the startup process,before most other twisted-related imports. Conversely, because itinitializes the IOLoop, it cannot be called beforefork_processes or multi-process start. Theseconflicting requirements make it difficult to use TornadoReactorin multi-process mode, and an external process manager such assupervisord is recommended instead.


在 4.1 版更改: The io_loop argument is deprecated.

Tornado on Twisted¶

class tornado.platform.twisted.TwistedIOLoop[源代码]¶

IOLoop implementation that runs on Twisted.

TwistedIOLoop implements the Tornado IOLoop interface on top ofthe Twisted reactor. Recommended usage:

from tornado.platform.twisted import TwistedIOLoop
from twisted.internet import reactor
TwistedIOLoop().install()
# Set up your tornado application as usual using IOLoop.instance
reactor.run()

Uses the global Twisted reactor by default. To create multipleTwistedIOLoops in the same process, you must pass a unique reactorwhen constructing each one.

Not compatible with tornado.process.Subprocess.set_exit_callbackbecause the SIGCHLD handlers used by Tornado and Twisted conflictwith each other.

See also tornado.ioloop.IOLoop.install() for general notes oninstalling alternative IOLoops.

Twisted DNS resolver¶

class tornado.platform.twisted.TwistedResolver[源代码]¶

Twisted-based asynchronous resolver.

This is a non-blocking and non-threaded resolver. It isrecommended only when threads cannot be used, since it haslimitations compared to the standard getaddrinfo-basedResolver andThreadedResolver. Specifically, it returns atmost one result, and arguments other than host and familyare ignored. It may fail to resolve when family is notsocket.AF_UNSPEC.

Requires Twisted 12.1 or newer.


在 4.1 版更改: The io_loop argument is deprecated.

原文:

https://tornado-zh-cn.readthedocs.io/zh_CN/latest/twisted.html