def on_multicast_received(self, host, method, message):
if method == "MAIN_GROUP/HOSTS":
hosts = json.loads(message)
list_of_hosts = [Host.from_json(h) for h in hosts]
client_ids = [
client.id for client in list_of_hosts
if client.host_type == HostType.CLIENT
]
for game in self.games:
removed = False
t_players = []
for player in game.players:
if player.id in client_ids:
p = game.get_player(player.id)
t_players.append(p)
else:
posx, posy = game.get_player_position(player)
game.grid.cells[posy][posx].player = None
removed = True
game.players = t_players
if removed:
self.send_game(game)
if method == "GS/OV":
game = Game.from_pickle(message)
if not game:
return
if game not in self.games:
print("FOUND NEW GAME!")
self.games.append(game)
for i, _game in enumerate(self.games):
if _game.id == game.id and _game.seq + 1 == game.seq:
self.games[i] = game
def on_unicast_received(self, host: Host, method: str, message: str):
if method == "SERVER/WELCOME":
print("Got other host, stop broadcasting")
self.discovery_service.stop_broadcasting()
data = json.loads(message)
host = Host.from_json(data.get("host"))
hosts = json.loads(data.get("hosts"))
list_of_hosts = [Host.from_json(h) for h in hosts]
for new_host in list_of_hosts:
self.currently_initializing.append(new_host.id)
self.socket_service.send_unicast(new_host, "SERVER/JOIN", "")
if method == "SERVER/JOIN":
self.all_host_group.add_participant(host)
print("ANSWERED HOST!")
current_leader = False
if self.election_service.current_leader:
current_leader = self.election_service.current_leader == self.own_host
self.socket_service.send_unicast(host, "SERVER/JOINED",
str(current_leader))
if method == "SERVER/JOINED":
print("Got answer from host!")
self.all_host_group.add_participant(host)
self.currently_initializing.remove(host.id)
if message == "True":
print("Got leader")
self.election_service.set_leader(host.id)
if len(self.currently_initializing) == 0:
self.socket_service.add_group(self.all_host_group)
self.all_host_group.announce_participants()
self.socket_service.send_unicast(
self.election_service.current_leader, "GS/SYNC_GAMES", '')
time.sleep(3)
if not self.election_service.leader_elected():
self.election_service.start_election()
elif method == "HB":
self.heartbeat_service.on_heartbeat_received(host, message)
self.election_service.on_message_received(host, method, message)
self.game_service.on_unicast_received(host, method, message)
def on_multicast_received(self, host, method: str, message, header):
if method == "MAIN_GROUP/HOSTS":
if 'resent' not in header:
hosts = json.loads(message)
list_of_hosts = [Host.from_json(h) for h in hosts]
self.set_host_list(list_of_hosts)
if method == "MAIN_GROUP/GET_HOSTS":
self.socket_service.send_group_multicast(
self,
f"MAIN_GROUP/HOSTS",
json.dumps([ob.to_json() for ob in self.participants]),
)
def on_server_multicast_received(self, host: Host, method: str,
message: str, header):
self.all_host_group.on_multicast_received(host, method, message,
header)
self.election_service.on_message_received(host, method, message)
if method == "MAIN_GROUP/HOSTS":
hosts = json.loads(message)
list_of_hosts_id = [Host.from_json(h).id for h in hosts]
if self.election_service.current_leader and self.election_service.current_leader.id not in list_of_hosts_id:
self.election_service.start_election()
elif not self.election_service.current_leader:
self.election_service.start_election()
self.game_service.on_multicast_received(host, method, message)
def on_unicast_received(self, host: Host, method: str, message: str):
if method == "SERVER/WELCOME":
print("Got other host, stop broadcasting")
self.discovery_service.stop_broadcasting()
data = json.loads(message)
hosts = json.loads(data.get("hosts"))
list_of_hosts = [Host.from_json(h) for h in hosts]
for new_host in list_of_hosts:
self.currently_initializing.append(new_host.id)
self.socket_service.send_unicast(new_host, "SERVER/JOIN", "")
elif method == "SERVER/JOINED":
print("Got answer from host!")
self.all_host_group.add_participant(host)
self.currently_initializing.remove(host.id)
if message == "True":
print("Got leader")
self.leader = host
if len(self.currently_initializing) == 0:
print("Announce new group")
self.socket_service.add_group(self.all_host_group)
self.all_host_group.announce_participants()
self.run_game()
if method == "SERVER/JOIN":
self.all_host_group.add_participant(host)
print("ANSWERED HOST!")
current_leader = False
self.socket_service.send_unicast(host, "SERVER/JOINED",
str(current_leader))
elif method == "GS/MS":
print(message)
elif method == "GS/ERROR":
self.run_game()
print(message)
elif method == "GS/LS":
self.run_game()
print(message)
elif method == "HB":
self.heartbeat_service.on_heartbeat_received(host, message)
while True:
(read, write, exception) = select.select([multicast_socket], [], [])
# Iterate through the tagged read descriptors
for receiver in read:
try:
data, address = receiver.recvfrom(BUFFER_SIZE)
encoded_data = data.decode('utf-8')
hostname = address[0]
port = address[1]
chunks = encoded_data.split(HEADER_DELIMITER)
header = json.loads(chunks[0])
method = header.get('m')
message = ''
if len(chunks) > 1:
message = chunks[1]
message_chunks = message.split(PAYLOAD_DELIMITER)
if method == "LCR/LEADER_CHANGED":
leader_id = message_chunks[0]
render()
elif method == "MAIN_GROUP/HOSTS":
print("GOT HOST UPDATE")
if 'resent' not in header:
hosts = json.loads(message)
hosts = [Host.from_json(h) for h in hosts]
render()
except Exception as e:
print("Exception", e)
traceback.print_exc()
continue
