def check_weight_update(weight_file, topo_file, nbrs):
global curr_table
global label
global t_start
print "Checking for Topology Changes"
path = './' + label + '/weights'
update = Graph()
update.init_config(label, weight_file, topo_file)
lock.acquire()
if curr_table.serialize != update.serialize:
curr_table.serialize = copy.deepcopy(update.serialize)
print "Topology update detected. Rerouting..."
update.bellman_on_src(label)
curr_table.routes[label] = copy.deepcopy(update.routes[label])
curr_table.set_routes(copy.deepcopy(update.get_routes()))
curr_table.hops[label] = copy.deepcopy(update.hops[label])
curr_table.set_hops(copy.deepcopy(update.get_hops()))
curr_table.start = datetime.now()
curr_table.bellman_on_src(label)
print curr_table.get_routes()
send_to_nbrs(nbrs)
lock.release()
threading.Timer(
period, check_weight_update,
[weight_file, topo_file, nbrs]).start() # Trigger Periodic Check
def set_init_graph(weight_file, topo_file):
global curr_table
global label
path = './' + label + '/weights'
g = Graph()
g.init_config(label, weight_file, topo_file)
g.bellman_on_src(label)
curr_table = g
print "Initial Table:\n" + str(curr_table.get_routes())
