def launch():
"""
Starts the Controller:
- topo is a string with comma-separated arguments specifying what
topology to build.
e.g.: 'jellyfish,4'
- routing is a string indicating what routing mechanism to use:
e.g.: 'ecmp8', 'kshort'
"""
# NOTE: currently only support jellyfish topology.
log.info("Launching Jellyfish controller")
# Read out configuration from file.
# NOTE: assumes jellyfish has been installed in the home directory.
config_loc = 'pox/ext/__jellyconfig'
with open(config_loc, 'r', os.O_NONBLOCK) as config_file:
log.info("inside")
n = int(config_file.readline().split('=')[1])
k = int(config_file.readline().split('=')[1])
r = int(config_file.readline().split('=')[1])
seed = int(config_file.readline().split('=')[1])
routing = config_file.readline().split('=')[1].strip()
jelly_topology = topologies["jelly"](random_seed=seed, n=n, k=k, r=r)
my_routing = Routing(jelly_topology, routing, log, seed=seed)
my_routing.generate_rtable()
core.registerNew(JellyfishController, jelly_topology, my_routing)
"""
# NOTE: currently only support jellyfish topology.
log.info("Launching Jellyfish controller")
# Read out configuration from file.
# NOTE: assumes jellyfish has been installed in the home directory.
config_loc = 'pox/ext/__jellyconfig'
with open(config_loc, 'r', os.O_NONBLOCK) as config_file:
log.info("inside")
n = int(config_file.readline().split('=')[1])
k = int(config_file.readline().split('=')[1])
r = int(config_file.readline().split('=')[1])
seed = int(config_file.readline().split('=')[1])
routing = config_file.readline().split('=')[1].strip()
jelly_topology = topologies["jelly"](random_seed=seed, n=n, k=k, r=r)
my_routing = Routing(jelly_topology, routing, log, seed=seed)
my_routing.generate_rtable()
core.registerNew(JellyfishController, jelly_topology, my_routing)
# for debugging
if __name__ == '__main__':
topo = 'dummy'
routing = 'ecmp'
my_topology = build_topology(topo)
my_routing = Routing(my_topology, routing, log)
my_routing.generate_rtable()