def __init__(self):
self._tcp_port = config.config()["network"]["port"]
tcp_handlers = {"new_db": save_db_handler}
self._tcp_net = ConnServer(("localhost", self._tcp_port), tcp_handlers)
self._local_net = CANserver(config.config()["can_net"]["interface"], self.local_message_handler)
self._conf_period = config.config()["can_net"]["confirmation_period"]
# number of periods to wait:
self._conf_timeout = config.config()["can_net"]["confirmation_timeout"] / self._conf_period
self._conf_waiters = {}
# _local_handlers struct: (message hanler, message decoder)
self._local_handlers = {
0: (self._handle_confirmation_msg, lprotocols.in_lvl2_confirmation),
1: (self._handle_common_msg, lprotocols.in_lvl2_common),
}
self._points_manager = PointsManager(self.send_local_msg)
self._log_sync = LogSynchronizer(self._tcp_net.server_out)
class Node:
def __init__(self):
self._tcp_port = config.config()["network"]["port"]
tcp_handlers = {"new_db": save_db_handler}
self._tcp_net = ConnServer(("localhost", self._tcp_port), tcp_handlers)
self._local_net = CANserver(config.config()["can_net"]["interface"], self.local_message_handler)
self._conf_period = config.config()["can_net"]["confirmation_period"]
# number of periods to wait:
self._conf_timeout = config.config()["can_net"]["confirmation_timeout"] / self._conf_period
self._conf_waiters = {}
# _local_handlers struct: (message hanler, message decoder)
self._local_handlers = {
0: (self._handle_confirmation_msg, lprotocols.in_lvl2_confirmation),
1: (self._handle_common_msg, lprotocols.in_lvl2_common),
}
self._points_manager = PointsManager(self.send_local_msg)
self._log_sync = LogSynchronizer(self._tcp_net.server_out)
#### <local_handlers>
def _handle_confirmation_msg(self, hw_addr, device_id, response_code):
# TODO: log smth
self._conf_waiters[(hw_addr, device_id)] = response_code
def _handle_common_msg(self, hw_addr, device_id, lfb, data):
# concatenate msgs (msgs must always be sended&recieved in order)
id = (hw_addr, device_id)
buffer = self._local_net.server_in.incomplete
if not buffer.has_key(id):
buffer[id] = []
buffer[id].append(data)
if lfb == 1:
self._points_manager.process_msg(id[0], id[1], buffer[id])
buffer[id] = []
#### <\local_handlers>
def send_local_msg(self, id, msg):
self._local_net.server_out.send(msg)
for i in range(0, int(self._conf_timeout)):
time.sleep(self._conf_period)
if self._conf_waiters.has_key(id):
return self._conf_waiters.pop(id)
return None
def start(self):
self._tcp_net.start_servers()
self._local_net.server_in.start()
self._log_sync.run() # ~ this is Node loop
# while True:
def local_message_handler(self, msg_str):
try:
msg_int = struct.unpack("Q", msg_str)
version, data = lprotocols.in_lvl1.unpack_msg(msg_int[0])
handler = self._local_handlers[version]
args = handler[1].unpack_msg(data)
handler[0](*args)
except Exception as exc:
log.logger().error("failed to handle local message: " + traceback.format_exc())
def stop(self):
self._tcp_net.shutdown()
log.logger().info("Node stopped.")