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# Implements I/O over asynchronous sockets
from time import time
from sys import exc_info
from traceback import format_exception
from asyncore import socket_map
from asyncore import loop
from pysnmp.carrier.base import AbstractTransportDispatcher
from pysnmp.error import PySnmpError
class AsyncoreDispatcher(AbstractTransportDispatcher):
def __init__(self):
self.__sockMap = {} # use own map for MT safety
self.timeout = 0.5
AbstractTransportDispatcher.__init__(self)
def getSocketMap(self): return self.__sockMap
def setSocketMap(self, sockMap=socket_map): self.__sockMap = sockMap
def registerTransport(self, tDomain, t):
AbstractTransportDispatcher.registerTransport(self, tDomain, t)
t.registerSocket(self.__sockMap)
def unregisterTransport(self, tDomain):
self.getTransport(tDomain).unregisterSocket(self.__sockMap)
AbstractTransportDispatcher.unregisterTransport(self, tDomain)
def transportsAreWorking(self):
for transport in self.__sockMap.values():
if transport.writable():
return 1
return 0
def runDispatcher(self, timeout=0.0):
while self.jobsArePending() or self.transportsAreWorking():
try:
loop(timeout and timeout or self.timeout,
use_poll=True, map=self.__sockMap, count=1)
except KeyboardInterrupt:
raise
except:
raise PySnmpError('poll error: %s' % ';'.join(format_exception(*exc_info())))
self.handleTimerTick(time())
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