forked from popacai/GroupEditor
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GBCASTManager.py
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GBCASTManager.py
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#!/usr/bin/python
#-*- coding:utf-8 -*-
from UserManager import UserManager
from CASTSelecter import CASTSelecter
from EBCASTManager import EBCASTManager
from AddrManager import AddrManager
from GBMessage import GBMessage
from ViewChange import ViewChange
import json
import threading
import time
'''
detect user add
#This is the leader <- the new client join in the group
send_all(view change[prepare]) #including itself
view change[done] messages from N nodes
send_all(view change)
view change
block local
resume if collect all ack
detect user remove
send_all(kick user)
recv_gbcast viewchange message
view change message
...
recv gbcast kick message
kick user
function for user add
'''
class GBCASTManager():
def __init__(self, UID, cast_s, user_m, abcast):
self.UID = UID
self.cast_s = cast_s
self.user_m = user_m
self.abcast = abcast
#Rlock is used in here
#condition will be notify once a GBCast message arrives
self.lock_user_list = threading.Lock()
self.cond = threading.Condition(self.lock_user_list)
self.addrmanager = AddrManager(self.user_m.local_addr, UID)
#print 'UID', UID
self.status = 0 #use status machine to control
#self.status = 1
self.ebcast = EBCASTManager(self.abcast, self, self.UID)
self.viewchange = ViewChange(self.abcast, self)
def update_user_dict(self, message):
user_dict = json.loads(message)
self.addrmanager.update_dict(user_dict)
def send_user_dict_request(self):
self.status = 1
user_dict = self.addrmanager.get_dict()
str_json = json.dumps(user_dict)
request_message = GBMessage()
request_message.user_id = self.UID
request_message.action = "ask for dict"
request_message.message = str_json
str_message = request_message.__encode__()
self.cast_s.sendGB(str_message)
if (len(self.user_m.temp_user_list.keys()) == 1):
self.status = 2
def send_user_dict(self):
user_dict = self.addrmanager.get_dict()
#dumps to json format
str_json = json.dumps(user_dict)
dict_message = GBMessage()
dict_message.view_id = self.user_m.view_id
dict_message.user_id = self.UID
dict_message.action = "dict"
dict_message.message = str_json
str_message = dict_message.__encode__()
self.cast_s.sendGB(str_message)
def connect_user_dict(self):
user_dict = self.addrmanager.get_dict()
for remote_uid in user_dict:
if remote_uid not in self.user_m.temp_user_list \
or remote_uid not in self.user_m.user_list:
addr = (user_dict[remote_uid][0], user_dict[remote_uid][1])
sock = self.user_m.add_user(addr, remote_uid)
if sock == None:
return False
return True
def test_clock(self, s):
message = GBMessage()
message.view_id = self.user_m.view_id
message.user_id = self.UID
message.action = "clock"
message.message = s
str_message = message.__encode__()
self.cast_s.sendGB(str_message)
def send_fetch_response(self, gb):
request_user = gb.user_id
message = GBMessage()
message.view_id = self.user_m.view_id
message.action = "fetch_response"
message.message = self.abcast.logManager.encodedRecord()
print 'fetch response', message.message
str_message = message.__encode__()
self.cast_s.sendGB(str_message, request_user)
def send_fetch_all_data(self):
message = GBMessage()
message.view_id = self.user_m.view_id
message.user_id = self.UID
message.action = "fetch_request"
message.message = "encode"
str_message = message.__encode__()
c = self.user_m.fetch_user_list()
other_user = ""
for user in c:
if user is not self.UID:
other_user = user
self.cast_s.sendGB(str_message, other_user)
def notify_all(self):
self.cond.acquire()
self.cond.notify_all()
self.cond.release()
def recv_gbcast(self):
#recv gbcast
str_message = self.cast_s.recvGB()
if len(str_message) < 1:
return
gb = GBMessage().__decode__(str_message)
#View ID is too old
print "action", gb.action
if (gb.action == "clock"):
print gb.user_id, gb.message
pass
if (gb.action == "kick"):
#remote delete
if (gb.view_id < self.user_m.view_id):
print gb.view_id, self.user_m.view_id, ' view id is too old'
return
if (gb.view_id > self.user_m.view_id):
self.user_m.updateuser_dict(self.user_m.fetch_user_list(), gb.view_id)
print 'kick', gb.message , "*"
if (gb.user_id in self.user_m.fetch_user_list()):
self.recv_delete_msg(gb.message, gb.user_id)
if (gb.action == "ask for dict"):
if (gb.user_id == self.UID):
#self.send_user_dict()
pass
else:
self.update_user_dict(gb.message)
self.send_user_dict()
if (gb.action == "dict"):
if (gb.view_id > self.user_m.view_id):
self.user_m.view_id = gb.view_id
self.update_user_dict(gb.message)
if self.status == 1:
if (self.connect_user_dict()):
self.status = 2
else:
print 'error!', 'cannot join the group, try again'
self.status = 0
print 'status', self.status
if (self.status == 2):
print 'ready to send prepare'
self.send_prepare()
if (gb.action == "prepare"):
if gb.view_id > self.user_m.view_id:
self.viewchange.prepare(gb)
else:
print 'PREPARE', "old view id", gb.view_id
pass
if (gb.action == "prepare-ok"):
print 'vid', gb.view_id
print 'uid', gb.user_id
print 'msg', gb.message
if (self.viewchange.prepare_ok(gb)):
#user_list = json.loads(gb.message)
#self.user_m.uate_user_list(user_list)
self.abcast.addUser("123")
print 'abcast resume'
self.abcast.resume()
if (gb.action == "fetch_request"):
print 'fetch data'
#request the fetch
#fetch local
#encode and send back
self.send_fetch_response(gb)
if (gb.action == "fetch_response"):
if self.viewchange.joiner == True:
if gb.view_id >= self.user_m.view_id:
#time.sleep(3)
print 'get fetched message'
self.viewchange.joiner = False
str_history = gb.message
t = self.abcast.logManager.decodedRecord(str_history)
self.abcast.synchronize(t)
gb.message = json.dumps(self.user_m.fetch_user_list())
print 'done'
#time.sleep(3)
self.abcast.start()
print 'send final prepare-ok'
self.send_prepare_ok(gb)
else:
print 'old view'
pass
#check whether to prepare OK
self.notify_all()
'''
send condition event
sync-request
send sync_user_list to all
prepare
call new user add
done #prepare-ok
log history done
call new user add
kick
call remove user
fetch
if (view_id) is equal
send all the data to that server
'''
def send_prepare_ok(self, gb):
message = gb
message.view_id = self.user_m.view_id
message.user_id = self.UID
message.action = "prepare-ok"
#message.message = str_user_list
print 'ok', message.message
str_message = message.__encode__()
self.status = 11
self.cast_s.sendGB(str_message)
def send_prepare(self):
self.status = 10
user_list = self.addrmanager.user_dict.keys()
user_list.remove(self.UID)
new_user_list = user_list + [self.UID]
self.user_m.update_user_list(new_user_list, self.user_m.view_id + 1)
message = GBMessage()
message.view_id = self.user_m.view_id + 1
message.user_id = self.UID
message.action = "prepare"
user_list = self.addrmanager.user_dict.keys()
user_list.remove(self.UID)
new_user_list = user_list + [self.UID]
str_json = json.dumps(new_user_list)
print "PREPARE", "new_user_list", new_user_list
message.message = str_json
str_message = message.__encode__()
self.cast_s.sendGB(str_message)
def send_kick_message(self, message):
print 'ERR', 'SEND Kick Message', message
kick_message = GBMessage()
kick_message.view_id = self.user_m.view_id
kick_message.user_id = self.UID
kick_message.action = "kick"
kick_message.message = "B" + message
str_message = kick_message.__encode__()
self.cast_s.sendGB(str_message)
def recv_signal(self):
user_to_kick = self.user_m.quit_user()
#self detect
print "ERR", "self detect", user_to_kick
self.ebcast.foundError(user_to_kick)
#TEMP
self.delete_user(user_to_kick)
def recv_delete_msg(self, message, src):
print 'ERR', "RECV delete message from", src, "msg:", message
trim_message = message[1:]
if message[0] == "B":
message = self.ebcast.receiveErrorBroadCast(trim_message)
if message[0] == "R":
message = self.ebcast.receiveErrorReply(trim_message)
if message == None:
return
else:
kick_message = GBMessage()
kick_message.view_id = self.user_m.view_id
kick_message.user_id = self.UID
kick_message.action = "kick"
kick_message.message = "R" + message
str_message = kick_message.__encode__()
self.cast_s.sendGB(str_message, src)
return
'''
self.lock_user_list.acquire()
if user_to_kick in self.user_m.fetch_user_list():
new_list = [user for user in self.user_m.fetch_user_list() if user != user_to_kick]
#self.user_m.update_user_list(new_list, self.user_m.view_id)
#del self.user_m.user_list[user_to_kick]
#I don't check it.
#Better to use update instead of this
#self.user_m.b.remove_addr(user_to_kick)
self.lock_user_list.release()
'''
def delete_user(self, user):
print 'ERR', 'delete user', user
userlist = self.user_m.fetch_user_list()
try:
userlist.remove(user)
except:
#print user , 'is not in the userlist'
pass
self.user_m.update_user_list(userlist, self.user_m.view_id)
self.addrmanager.remove_dict(user)
#print 'ERR', 'delete user done'
def recheck_join_status(self):
self.cond.acquire()
self.cond.wait()
self.cond.release()
if self.viewchange.check_log():
self.abcast.addUser("123")
self.abcast.resume()
#print 'abcast resume'