Question

我有以下情况;我的Pyro4项目有一个服务器和一个客户端。服务器包含一个需要在同一个回调对象上调用2个回调的方法。因此，课程Callback有两种回调方法：Callback()和SecondCallback()。这些回调方法的调用之间存在一些延迟。我通过调用time.sleep来模拟我的示例中的延迟。

我需要在Pyro4（Pyro4.config.COMMTIMEOUT）上设置超时，因为没有一个，Pyro4守护进程永远不会突破requestLoop方法。当调用一个回调方法时，这非常有效，但是当你必须调用第二个回调方法时，Pyro4回调守护进程会在调用第一个回调方法+超时后关闭连接。

我尝试将超时设置为更大的数量，但此超时也是requestLoop方法阻止它处理loopCondition的时间。

下面列出了演示我的问题的示例脚本。您需要在启动Pyro4名称服务器后启动服务器启动它：

python -m Pyro4.naming

python test.py -s

然后在新的cmd窗口中启动客户端：

python test.py

Test.py

import Pyro4, time
from argparse import ArgumentParser

ip = "127.0.0.1"

class Server:

    def __init__(self):
        pass

    def ActionOne(self):
        return "Foo"

    def ActionTwo(self):
        return "Bar"

    @Pyro4.oneway
    def ActionThree(self, callback):
        time.sleep(4)
        callback.Callback()
        time.sleep(3)
        callback.SecondCallback()

class Callback:

    def __init__(self):
        self.Executed = False
        pass

    def Callback(self):
        print "FooBar"

    def SecondCallback(self):
        print "raBooF"
        self.Executed = True

def loopWhile(condition):
    while condition:
        time.sleep(.1)


if __name__ == "__main__":
    parser = ArgumentParser()
    parser.add_argument("--server", "-s", action="store_true")

    args = parser.parse_args()
    if(args.server):
        print "Server"

        daemon = Pyro4.core.Daemon(host=ip)
        uri = daemon.register(Server())

        ns = Pyro4.naming.locateNS(host=ip)
        ns.register("server", uri)

        daemon.requestLoop()

        pass
    else:
        print "Client"
        Pyro4.config.COMMTIMEOUT = .5

        ns = Pyro4.naming.locateNS(host=ip)
        serverUri = ns.lookup("server")
        proxy = Pyro4.core.Proxy(serverUri)

        print proxy.ActionOne()
        print proxy.ActionTwo()

        daemon = Pyro4.core.Daemon(host=ip)
        callback = Callback()
        daemon.register(callback)

        proxy.ActionThree(callback)
        daemon.requestLoop(lambda: not callback.Executed)
        print "FINISHED"

此脚本的结果：

Server：

Server
Exception in thread Thread-17:
Traceback (most recent call last):
  File "C:\Program Files (x86)\IronPython 2.7\Lib\threading.py", line 552, in _T
hread__bootstrap_inner
    self.run()
  File "C:\Program Files (x86)\IronPython 2.7\Lib\threading.py", line 505, in ru
n
    self.__target(*self.__args, **self.__kwargs)
  File "test.py", line 22, in ActionThree
    callback.SecondCallback()
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\Pyro4\core.py",
line 171, in __call__
    return self.__send(self.__name, args, kwargs)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\Pyro4\core.py",
line 410, in _pyroInvoke
    msg = message.Message.recv(self._pyroConnection, [message.MSG_RESULT], hmac_
key=self._pyroHmacKey)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\Pyro4\message.py
", line 168, in recv
    msg = cls.from_header(connection.recv(cls.header_size))
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\Pyro4\socketutil
.py", line 448, in recv
    return receiveData(self.sock, size)
  File "C:\Program Files (x86)\IronPython 2.7\lib\site-packages\Pyro4\socketutil
.py", line 190, in receiveData
    raise ConnectionClosedError("receiving: connection lost: " + str(x))
ConnectionClosedError: receiving: connection lost: [Errno 10022] A request to se
nd or receive data was disallowed because the socket is not connected and (when
sending on a datagram socket using a sendto call) no address was supplied

Client：

Client
Foo
Bar
FooBar

我的最后一个问题是：当调用第二个回调时，如何在COMMTIMEOUT到期后阻止Pyro4关闭连接？

我希望所有这些信息都清楚明白。

感谢您的帮助。

Answer 1

供将来参考：

我可以通过调用：

重新启动与回调的连接

callback._pyroReconnect()

在调用第二个回调方法之前

如何在COMMTIMEOUT之后阻止Pyro4关闭连接

1 个答案: