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node.py
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node.py
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from message import message
import math
from multiprocessing.managers import BaseManager
from random import randint
from multiprocessing import Process,Queue
from time import sleep
SERVER=-1
GUEST=-2
n=100
gnode=None
class ChordNode():
def __init__(self,id,q,inbox,n):
self.process=None
self.ft=[]
self.id=id
self.data=[]
self.sucs=-1
self.pred=-1
self.connection=q
self.inbox=inbox
self.n=n
def send_to_node(self,msg):
if msg.reciever==SERVER:
self.connection.put(msg)
return
self.connection.put(message(self.id,SERVER,("forward",msg)))
def stop(self):
self.send_to_node(message(self.id,self.pred,("setsucs",self.sucs)))
self.send_to_node(message(self.id, self.sucs, ("setpreds", self.pred)))
self.send_to_node(message(self.id,SERVER,("removed",self.id)))
for d in self.data:
self.send_to_node(message(self.id,self.sucs,("adddata",d)))
def is_sucs_me(self,num):
if (num==self.id or self.sucs==self.id):
return True
if (self.pred>self.id):
if num>self.pred or num<self.id:
return True
if (num>self.pred and num<self.id):
return True
def requestSucs(self,num):
if (self.is_sucs_me(num)):
return self.id
self.send_to_node(message(self.id,self.sucs,("sucs",num)))
while(True):
msg = self.inbox.get()
if (msg.data[0]=="sucsresp"):
data = msg.data
break
self.connection.put(msg)
return data[1]
def fillFt(self):
n=self.n
lenFT=math.ceil(math.log2(n))
for i in range(lenFT):
self.ft[i]=self.requestSucs((self.id+ 2**i)%n)
def run(self):
print("node",self.id,"started successfully with preds",self.pred,"and sucs",self.sucs)
while(True):
print(self.data)
msg=self.inbox.get()
if (msg.data[0]=="getdata"):
for d in self.data:
if d[0]==msg.data[1]:
self.send_to_node(message(self.id,msg.sender,("dataresp",d)))
pass
if (msg.data[0] == "preds"):
self.send_to_node(message(self.id,msg.sender,("predsresp",self.pred)))
if (msg.data[0]=="sucs"):
if (self.is_sucs_me(msg.data[1])):
self.send_to_node(message(self.id,msg.sender,("sucsresp",self.id)))
else:
self.send_to_node(message(msg.sender, self.sucs, msg.data))
'''
for i in range(len(self.ft)-1):
if self.ft[i]>=msg.data[1] and self.ft[i+1]:
self.send_to_node(message(msg.sender,self.ft[i-1],msg.data))
break
'''
if (msg.data[0]=="added"):
pass
#self.fillFt()
if (msg.data[0]=="stop"):
return self.stop()
if (msg.data[0] == "setpreds"):
self.pred=msg.data[1]
if (msg.data[0] == "setsucs"):
self.sucs = msg.data[1]
if (msg.data[0]=="adddata"):
self.data.append(msg.data[1])
if (msg.data[0]=="reqdata"):
node_id=msg.sender
if node_id<self.id:
for d in self.data:
if d[0]>node_id and d[0]<self.id:
pass
else:
self.send_to_node(message(self.id,node_id,("adddata",d)))
self.data.remove(d)
else:
for d in self.data:
if d[0]<node_id:
self.send_to_node(message(self.id, node_id, ("adddata", d)))
self.data.remove(d)
class myManager(BaseManager):
pass
def start(inbox,connection,id,sucs,preds,n):
node=ChordNode(id,connection,inbox,n)
connection.put(message(id,SERVER,("add",id)))
node.send_to_node(message(id,sucs,("setpreds",id)))
node.send_to_node(message(id, sucs, ("reqdata",None)))
node.send_to_node(message(id, preds, ("setsucs", id)))
node.sucs=sucs
node.pred=preds
#node.fillFt()
node.run()
def rand_start(n):
myManager.register('get_connection')
myManager.register('get_inbox')
myManager.register('get_guest_queue')
m = myManager(address=('localhost', 50000), authkey=b'abc')
m.connect()
gq = m.get_guest_queue()
connection = m.get_connection()
id=None
mysucs=None
while(True):
rint=randint(0,n)
connection.put(message(GUEST,SERVER,("sucs",rint)))
resp=gq.get()
if resp.data[1]==False:
id=rint
mysucs=rint
break
if resp.data[1]!=rint:
id=rint
mysucs=resp.data[1]
break
connection.put(message(GUEST,SERVER,("preds",id)))
resp=gq.get()
#pr=Process(target=start,args=(m.get_inbox(id),connection,id,mysucs,resp.data[1],n,))
#pr.start()
#return pr
start(m.get_inbox(id),connection,id,mysucs,resp.data[1],n)
def main():
pr=Process(target=rand_start,args=(n,))
pr.start()
sleep(1)
#menue(pr)
#rand_start(n)
if __name__ == '__main__':
main()