def listen(self):
while True:
log('listening to receive message')
response, address = self.socket.receive()
if (response is None and address is None):
continue
message = Message.parse(response)
if (message.type == MessageType.JOIN_SWARM):
self.saveNewMemberToSwarm(address)
if (self.sharedData['leader']['isSelf']):
self.announceLeadership(address)
continue
if (message.type == MessageType.LEADER):
self.sharedData['leader']['isSelf'] = False
self.sharedData['leader']['address'] = address
log('Leader is ', address)
continue
if (message.type == MessageType.ALIVE):
self.socket.send(MessageType.ALIVE_OK, address)
continue
if (message.type == MessageType.ALIVE_OK):
self.sharedData['leader']['isAlive'] = True
continue
if (message.type == MessageType.ELECTION):
self.handleElectionMessage(message, address)
continue
if (message.type == MessageType.OK):
log('Received OK for election id ', message.params[1])
self.sharedData['elections'][
message.params[1]]['isLeader'] = False
continue
raise NotImplementedError(message.type)
def receive(self):
response, address = self.socket.recvfrom(BUFFERSIZE)
message = Message.parse(response)
if (self.sharedData['failProcess']):
if (message.type != MessageType.LEADER):
log('%s message received ignored' % message.type.name)
return (None, None)
self.storeStatistics(message.type, 'received')
log('%s message received' % message.type.name)
return (response, address)
def sendMessage(self, message, address):
messageParsed = Message.parse(message)
name = messageParsed.type.name
if (self.sharedData['failProcess']):
log("%s message sent blocked" % name)
return
log("%s message sent" % name)
self.storeStatistics(messageParsed.type, 'sent')
return self.socket.sendto(message, address)
def initListening(self):
print('tracker will start listening...', flush=True)
while True:
response, address = self.socket.recvfrom(1024)
message = Message.parse(response)
if (message.type == MessageType.GET_MEMBERS):
self.joinSwarm(address)
continue
if (message.type == MessageType.KILL):
print('finishing', flush=True)
os._exit(0)
raise NotImplementedError(message.type)
def getSwarmMembers(self):
self.socket.send(MessageType.GET_MEMBERS, self.trackerAddress)
response, address = self.socket.receive()
message = Message.parse(response)
self.sharedData['swarmMembers'] = json.loads(message.params[0])