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我最好从代码开始提问。定时器线程的终止过程
from multiprocessing import Process, Event, Queue
from threading import Timer
from Queue import Empty
class MyServer(Process):
def __init__(self, port, queue):
Process.__init__(self)
self.port = port
self.queue = queue
self.sd = None
def run(self):
try:
self.start_serving()
except KeyboardInterrupt:
print("Shutting down..")
finally:
if self.sd is not None:
self.sd.close()
def start_serving(self):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.sd = s
try:
s.bind(('', self.port))
s.listen(1)
while True:
conn, addr = s.accept()
while True:
# I dont want to bore you with excess code
# just recv data from clients
try:
msg = self.queue.get_nowait()
# here i start Timer with delay from message (I'll describe Message class below)
Timer(msg.delay, self.response_handler, args=(conn, msg)).start()
except Empty:
pass
conn.close()
finally:
s.close()
def response_handler(self, sd, msg):
# doesn't matter
# and now I want to terminate the MyServer instance
if msg.terminate:
# the problem is here. Lets call it 'problem line'
sys.exit()
msg
是Message
类,这是实例:
class Message(object):
def __init__(self, port, delay, values, terminate=False):
self.port = port
self.delay = delay
self.values = values
self.terminate = terminate
的逻辑是我通过TCP连接从获取客户端的数据,并检查队列用于消息。消息是控制服务器的东西。有时我收到一条消息,如“等待3秒钟并终止服务器”。 迄今为止我所做的一切。
- 致电
self.terminate()
在problem line
。我得到AttributeError: 'NoneType' object has no attribute 'terminate'
- 在
problem line
引发异常。我认为这个例外被run()
函数捕获。我是 错误 - 致电
sys.exit()
。它也行不通。
也许我的问题可以缩短。如何从Python的线程中终止进程?
嗨,你有没有设法解决这个问题? –
@ShiftyScales我的歉意,我不记得细节。我很可能使用了下面答案和其他一些代码中的一些混合解决方案。 – Deck