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from twisted.names.dns import DNSDatagramProtocol
from twisted.names.server import DNSServerFactory
from twisted.names import hosts, client
from benchlib import Client, driver
class Client(Client):
def __init__(self, reactor, portNumber, timeout):
self._resolver = client.Resolver(servers=[('127.0.0.1', portNumber)])
self._timeout = timeout
super(Client, self).__init__(reactor)
def _request(self):
d = self._resolver.lookupAddress(
'localhost', timeout=(self._timeout,))
d.addCallback(self._continue)
d.addErrback(self._stop)
def main(reactor, duration):
concurrency = 10
controller = DNSServerFactory([hosts.Resolver()])
port = reactor.listenUDP(0, DNSDatagramProtocol(controller))
# Have queries time out no sooner than the duration of this benchmark so
# we don't have to deal with retries or timeout errors.
client = Client(reactor, port.getHost().port, duration)
d = client.run(concurrency, duration)
def cleanup(passthrough):
d = port.stopListening()
d.addCallback(lambda ign: passthrough)
return d
d.addBoth(cleanup)
return d
if __name__ == '__main__':
import sys
import names
driver(names.main, sys.argv)
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