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Introduce basic unreliability

This commit is contained in:
Oskar Thoren 2019-01-09 07:59:16 -05:00
parent f00c382ed5
commit c485a39fb5
1 changed files with 15 additions and 9 deletions
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24
data_sync/sync.py
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@ -1,6 +1,7 @@
# Sync protocol PoC # Sync protocol PoC
import hashlib import hashlib
import random
import sync_pb2 import sync_pb2
import time import time
@ -32,16 +33,22 @@ class NetworkSimulator():
self.time = 0 self.time = 0
self.queue = {} self.queue = {}
self.peers = {} self.peers = {}
# XXX: Assuming nodes are offline most of the time
# This is different types of nodes, not global
self.reliability = 0.5
def tick(self): def tick(self):
if self.time in self.queue: if self.time in self.queue:
# XXX: Should sender be here? # XXX: Should sender be here?
for sender, receiver, msg in self.queue[self.time]: for sender, receiver, msg in self.queue[self.time]:
# NOTE: Assumes 100% reliability if random.random() < self.reliability:
receiver.on_receive(sender, msg) print "*** message ok", sender.name, "->", receiver.name
print "" receiver.on_receive(sender, msg)
print "tick", self.time + 1 else:
print "-----------" print "*** message dropped", sender.name, "->", receiver.name
#print ""
#print "tick", self.time + 1
#print "-----------"
for n in self.nodes: for n in self.nodes:
n.tick() n.tick()
self.time += 1 self.time += 1
@ -225,7 +232,7 @@ def new_ack_record(id):
# Mocking # Mocking
################################################################################ ################################################################################
def run(steps=4): def run(steps=10):
n = NetworkSimulator() n = NetworkSimulator()
a = Node("A", n) a = Node("A", n)
@ -261,8 +268,8 @@ def run(steps=4):
peer.append_message(rec) peer.append_message(rec)
n.tick() n.tick()
a.print_sync_state() #a.print_sync_state()
b.print_sync_state() #b.print_sync_state()
acc = "\n" acc = "\n"
for _, msg in a.messages.items(): for _, msg in a.messages.items():
@ -305,7 +312,6 @@ run()
# For any given (data) group, a device can decide # For any given (data) group, a device can decide
# if they want to share or not with a peer. # if they want to share or not with a peer.
# TODO: ACK should also be share policy # TODO: ACK should also be share policy
# XXX: Encode offline mostly # XXX: Encode offline mostly