def youAreLeader_handler(self, addr, args, recievedMsg):
print("\n" + addr)
if self.electionStatus is not None and self.electionStatus.decided == False:
response = Election.fromString(recievedMsg)
if response.view > self.electionStatus.view and (
response.view % self.totalNumber) != self.pid: # not me
self.electionStatus.latestValue = Message.fromString(
response.latestValue)
if self.electionStatus.majorityCheck.addVoteAndCheck():
self.electionStatus.decided = True
print("Yeah, I become a leader, pid: ", self.pid)
#self.leaderAlive = True
hole = self.detectHole()
if hole != -1:
filling = Record(self.view, hole, self.buffer[0])
self.propose(filling)
if self.electionStatus.latestValue is not None: #doubt, why is this here?
latestMsg = Message(self.electionStatus.latestValue)
fromPrevious = Record(self.view, response.roundNumber,
latestMsg)
self.propose(fromPrevious)
print("Ready to process client requests.")
def iAmLeader_handler(self, addr, args, recievedMsg):
print("\n" + addr)
self.leaderAlive = True
election = Election.fromString(recievedMsg)
newView = election.view
newLeader = newView % self.totalNumber
newRound = election.roundNumber
print("Process {} sent iAmLeader.".format(newLeader))
if newView >= self.view:
previousView = self.view
self.view = newView
# send back my previous state
if self.lastRound == newRound - 1: # normal case
previousValue = None
elif self.lastRound == newRound:
record = self.records[newRound]
#if record.learned == Falise: # only when it is not learned yet
previousValue = record.message
#else:
# previousValue = None
elif self.lastRound < newRound:
print("I am missing something")
# TODO ask other server for the missing value
#should send previous value as None and learn it only if it has already been learned or learn it anyways?
#update learning based on view number and if it learned, mark it (things to learn from others)
#use for loop to send one by one with round number
previousValue = None
#count = (newRound-1) - self.lastRound
roundNumberTemp = self.lastRound + 1
while roundNumberTemp < newRound:
sendingMsg = "server\t{}\t{}".format(
str(self.pid), str(roundNumberTemp))
self.sendMessageToServers("/requestMissingValue",
sendingMsg)
roundNumberTemp += 1
elif self.lastRound > newRound:
# this guy is missing some records.
self.sendLeaderFaulty()
return
print("Sending youAreLeader...")
response = Election(previousView, self.lastRound, previousValue)
leaderChannel = self.sendChannels[newLeader]
# leaderChannel.send_message("/youAreLeader", response.toString())
sendMessageWithLoss(leaderChannel, "/youAreLeader",
response.toString(), self.lossRate)
