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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
# Copyright (C) 2014 Philipp Rosenkranz <philipp.rosenkranz@fu-berlin.de>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
import sys, signal, threading
from twisted.internet import reactor
from twisted.internet.protocol import Protocol, Factory
class PubProtocol(Protocol):
def __init__(self, factory):
self.factory = factory
def connectionMade(self):
print("new connection made")
def connectionLost(self, reason):
self.factory.numProtocols = self.factory.numProtocols - 1
def connectionLost(self, reason):
self.factory.clients = {key: value for key, value in self.factory.clients.items()
if value is not self.transport}
def dataReceived(self, data):
if data.startswith("hostname: "):
remoteHostname = data.split()[1].strip()
print("dataReceived added: " + remoteHostname)
self.factory.clients[remoteHostname] = self.transport
else:
print("received some useless data...")
class PubFactory(Factory):
def __init__(self):
self.clients = dict()
def buildProtocol(self, addr):
return PubProtocol(self)
class ExperimentRunner():
def __init__(self, experiment, testbed):
self.publisher = PubFactory()
self.port = int(testbed.serverPort)
self.experiment = experiment(self.publisher, self)
self.testbed = testbed
def run(self):
signal.signal(signal.SIGINT, self.handle_sigint)
self.experiment.run()
reactor.listenTCP(self.port, self.publisher)
# clean logfiles and start nodes but don't flash nodes
self.testbed.initClean()
reactor.run()
def stop(self):
self.testbed.stop()
reactor.callFromThread(self.safeReactorStop)
def safeReactorStop(self):
if reactor.running:
try:
reactor.stop()
except:
print("tried to shutdown reactor twice!")
def handle_sigint(self, signal, frame):
self.experiment.stop()
self.testbed.stop()
self.stop() # shutdown if experiment didn't already
class Experiment():
def __init__(self, factory, runner):
self.factory = factory
self.runner = runner
self.hostid = dict()
self.sumDelay = 0
def run(self):
print("Running preHook")
self.preHook()
print("Running experiment")
self.start()
def start(self):
raise NotImplementedError("Inherit from Experiment and implement start")
def stop(self):
print("Running postHook")
self.postHook()
self.runner.stop()
def preHook(self):
pass
def postHook(self):
pass
def readHostFile(self, path):
id = 1
with open(path) as f:
for line in f:
self.hostid[line.strip()] = id
id += 1
def sendToHost(self, host=None, cmd=""):
if host in self.factory.clients:
self.factory.clients[host].write(cmd + "\n")
else:
print("sendToHost: no such host known: " + host + " !")
def sendToAll(self, cmd=""):
for host, transport in self.factory.clients.items():
self.sendToHost(host, cmd)
def pauseInSeconds(self, seconds=0):
from time import time, sleep
start = time()
while (time() - start < seconds):
sleep(seconds - (time() - start))
def callLater(self, absoluteDelay = 0.0, function = None):
reactor.callLater(absoluteDelay, function)
def waitAndCall(self, relativeDelay = 0.0, function = None):
self.sumDelay += relativeDelay
self.callLater(self.sumDelay, function)
def clientIterator(self):
return self.factory.clients.items()
def connectionByHostname(self, host=None):
if host in self.factory.clients:
return self.factory.clients[host]
@staticmethod
def sendToConnection(connection, line):
connection.write(line + "\n")
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