本文整理汇总了Python中tornado.ioloop.add_callback_from_signal方法的典型用法代码示例。如果您正苦于以下问题：Python ioloop.add_callback_from_signal方法的具体用法？Python ioloop.add_callback_from_signal怎么用？Python ioloop.add_callback_from_signal使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类tornado.ioloop的用法示例。
在下文中一共展示了ioloop.add_callback_from_signal方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: start
# 需要导入模块: from tornado import ioloop [as 别名]
# 或者: from tornado.ioloop import add_callback_from_signal [as 别名]
def start(cls):
if cls.started:
return
"""
IOLoop.running() was removed as of Tornado 2.4; see for example
https://groups.google.com/forum/#!topic/python-tornado/QLMzkpQBGOY
Thus there is no correct way to check if the loop has already been
launched. We may end up with two concurrently running loops in that
unlucky case with all the expected consequences.
"""
ioloop = tornado.ioloop.IOLoop.instance()
def shutdown():
ioloop.stop()
print("Server is stopped")
sys.stdout.flush()
cls.started = False
@contextmanager
def catch_sigint():
old_handler = signal.signal(
signal.SIGINT,
lambda sig, frame: ioloop.add_callback_from_signal(shutdown))
try:
yield
finally:
signal.signal(signal.SIGINT, old_handler)
# Set the flag to True *before* blocking on ioloop.start()
cls.started = True
print("Press Ctrl+C to stop WebAgg server")
sys.stdout.flush()
with catch_sigint():
ioloop.start()