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casormu.py
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casormu.py
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#Giorgos Mitaros AM: 2312
#Email: gmitaros@gmail.com
#Email: cs122312@cse.uoi.gr
#
#
# python casormu.py 127.0.0.1 0 2312
# python casormu.py 127.0.0.1 1 2313
# python casormu.py 127.0.0.1 2 2314
#
#
import optparse
import socket
import random
import time
import heapq
import copy
import sys
import threading
from twisted.internet.protocol import ReconnectingClientFactory
from twisted.internet.protocol import Protocol, ClientFactory
from twisted.internet import reactor
connections = 0
transports = []
class Message:
def __init__(self, id, type, msg, vClock, f, originalID, newId):
self.msgID = id
self.msgType = type
self.message = msg
self.vClock = vClock
self.first = f
self.creatorID = originalID
self.newID = newId
def toString(self):
string = str(self.msgID)+"."+str(self.msgType)+"."+str(self.message)+"."+str(self.vClock[0])+"."+str(self.vClock[1])+"."+str(self.vClock[2])+"."+str(self.first)+"."+str(self.creatorID)+"."+str(self.newID)
return string
def parse_args():
usage = """usage: %prog [options] [hostname] [thread number] [port]
python totormu.py 127.0.0.1 0 2312 """
parser = optparse.OptionParser(usage)
_, args = parser.parse_args()
if len(args) != 3:
print parser.format_help()
parser.exit()
address, threadNo, port = args
return address, threadNo, port
class Peer(Protocol):
connected = False
counter = 0
flag = 0
f = None
overallSequenceNumber = 0
groupSequenceNumber = 0 # At Each process message received
messagesReceived = 0
#Message acks block
acks = {}
#vector Clock
vClock = [0,0,0]
vectorClockProcess = [0,0,0];
#Queue
orderQueue = [] #PriorityQueue
msgWaitingQueue = {} #Hashtable with Key= msg.msgID and Value= msg.message
globalEvent = [] #
#Locks
socketsLock = threading.Lock()
queueLock = threading.Lock()
def __init__(self, factory):
self.factory = factory
def connectionMade(self):
print "Connection Happened"
global connections
connections += 1
global transports
transports.append(self.transport)
print "procNo: " + procNo + " connections: " + str(connections)
if (connections == 2):
#Ftiaxnw to arxeio gia na grafw ta minimata pou lamvanw
fileName ="delivered-messages-"+str(procNo)
self.f = open(fileName, 'w')
print "\n\n"
self.loop()
def loop(self):
#Write message
if (self.flag < 20 ):
if (int(procNo) == 0):
self.vClock[int(procNo)]+=1
send = Message((self.counter), str("message"),str("Message: "+str(self.flag)), (self.vClock), False, int(procNo), int(0))
(self.f).write("ID: "+ str(send.msgID)+" "+ str(send.message)+ "\n")
self.counter+=1
self.sendUpdate(send)
self.deliverMessage()
reactor.callLater(3, self.loop)
self.flag+=1
else:
self.deliverMessage()
reactor.callLater(2, self.loop)
def deliverMessage(self):
message = None
self.queueLock.acquire()
if(len(self.orderQueue) > 0):
priority, m = self.orderQueue[0]
print priority, self.groupSequenceNumber, self.msgWaitingQueue.keys()
if(priority[1] == self.groupSequenceNumber and (priority[0] in self.msgWaitingQueue)):
print "Inside msg waitig group", self.groupSequenceNumber
msg = self.msgWaitingQueue[priority[0]]
message = msg
del self.msgWaitingQueue[priority[0]]
print "exporting this: ", msg
(self.f).write("ID: "+ str(priority[0])+" "+ str(msg)+ "\n")
self.groupSequenceNumber += 1
priority, m = heapq.heappop(self.orderQueue)
self.queueLock.release()
if (self.flag >=19 and (len(self.orderQueue) <= 0)):
self.f.close()
return message
def sendUpdate(self, message):
#Vazw paules gia na min mplekontai ta minimata metaksi tous
msg = message.toString()
msg = "-"+msg+"-|/"
#Stelnw se olous kai ston eauto mou
self.socketsLock.acquire()
try:
global transports
for transport in transports:
transport.write(msg)
except Exception, ex1:
print "Exception trying to send: ", ex1.args[0]
self.socketsLock.release()
def causallOrder(self, msg):
if(str(msg.msgType) == "Order") :
priority = (msg.msgID, msg.newID)
heapq.heappush(self.orderQueue, ((msg.msgID, msg.newID), msg))
else:
id = (msg.msgID, msg.message)
self.msgWaitingQueue[msg.msgID]=msg.message
#print "Vector Clock: ", msg.vClock
if(int(procNo) == 1):
flag = False
if (msg.vClock[msg.creatorID] == (self.vectorClockProcess[msg.creatorID] + 1) ):
flag = True
else:
flag = False
if(flag):
vc = [-1,-1,-1]
self.vectorClockProcess[msg.creatorID] = max(self.vectorClockProcess[msg.creatorID],msg.vClock[msg.creatorID])
m = Message(msg.msgID, "Order", "order-order", vc, False, int(procNo), self.overallSequenceNumber)
self.overallSequenceNumber = self.overallSequenceNumber + 1
#print "i am sending order msg..."
self.causallOrder(m)
self.sendUpdate(m)
else:
self.globalEvent.append(msg)
if (len(self.globalEvent) > 0) :
for first in self.globalEvent:
f = False
print self.printMsg(first)
if (first.vClock[first.creatorID] == (self.vectorClockProcess[first.creatorID] + 1) ):
f = True
else:
f = False
if(f):
vc = [-1,-1,-1]
self.vectorClockProcess[first.creatorID] = max(self.vectorClockProcess[first.creatorID],first.vClock[first.creatorID]);
m = Message(first.msgID, "Order", "order-order", vc, False, (self.procNo), overallSequenceNumber)
self.overallSequenceNumber += 1
globalEvent.remove(first)
self.causallOrder(m)
self.sendUpdate(m)
else:
for i in range(0,3) :
self.vClock[i]=max(self.vClock[i],msg.vClock[i])
def dataReceived(self, data):
msgs= data.split("|")
start = '-'
end = '-'
for minima in msgs:
#print minima
if len(minima)>5:
#Afairw tis paules ('-')
minima = minima[minima.find(start)+len(start):minima.rfind(end)]
minima = minima.split(".")
#Dimiourgw ena antikeimeno tupou Message
msg = self.createMessage(minima)
self.printMsg(msg)
self.causallOrder(msg)
def connectionLost(self, reason):
print "Disconnected"
def done(self):
self.factory.finished(self.acks)
def createMessage(self, var):
msgID = var[0]
msgType = var[1]
message = var[2]
VC = int(var[3])
VC1 = int(var[4])
VC2 = int(var[5])
vClock = [VC,VC1,VC2]
first = (var[6] == "True")
creatorID = var[7]
newID = var[8]
msgObject = Message(int(msgID), msgType, message, vClock, first, int(creatorID), int(newID) )
return msgObject
def printMsg(self, msg):
print "----Message Info----"
print "ID: ", msg.msgID
print "Type: ", msg.msgType
print msg.message
print "senderClock: ", msg.vClock
print "First: ", msg.first
print "creatorId:", msg.creatorID
print "newID:", msg.newID
print "---------------------\n"
class PeerFactory(ClientFactory, ReconnectingClientFactory):
def __init__(self):
print '@__init__'
self.acks = 0
self.records = []
def finished(self, arg):
self.acks = arg
self.report()
def report(self):
print 'Received %d acks' % self.acks
def clientConnectionFailed(self, connector, reason):
print 'Failed to connect to:', connector.getDestination()
self.finished(0)
def clientConnectionLost(self, connector, reason):
print 'Lost connection. Reason:', reason
# Connect to another peer with following host and port
# Host and port could be read from a list which stores peer information
connector.host = '127.0.0.1'
connector.port = 9999
ReconnectingClientFactory.clientConnectionLost(self, connector, reason)
def startFactory(self):
print "@startFactory"
def stopFactory(self):
print "@stopFactory"
def buildProtocol(self, addr):
print "@buildProtocol"
protocol = Peer(self)
return protocol
if __name__ == '__main__':
address, procNo, porta = parse_args()
if (int(procNo) == 0):
print "I am process " + procNo
print "Addr: "+ address + "\nPort: " + porta
print "Local ip: " + socket.gethostbyname(socket.gethostname())+"\n"
port = int(porta)
server = PeerFactory()
reactor.listenTCP(port, server)
print "Starting server @" + address + " port " + str(port)
elif(int(procNo) == 1):
#Client things
print "I am process " + procNo
factory = PeerFactory()
port = int(porta) - 1
print "Connecting to host " + address + " port " + str(port)
reactor.connectTCP(address, port, factory)
#Server things
server2 = PeerFactory()
reactor.listenTCP(int(porta), server2)
print "Starting server @" + address + " port " + str(porta)
elif(int(procNo) == 2):
print "I am process " + procNo
client3 = PeerFactory()
factory2 = PeerFactory()
port1 = int(porta) - 1
port2 = int(porta) - 2
print "Connecting to host " + address + " port " + str(port1)
reactor.connectTCP(address, port1, client3)
print "Connecting to host " + address + " port " + str(port2)
reactor.connectTCP(address, port2, factory2)
reactor.run()