class TBGatewayService:
def __init__(self, config_file=None):
if config_file is None:
config_file = path.dirname(path.dirname(
path.abspath(__file__))) + '/config/tb_gateway.yaml'.replace(
'/', path.sep)
with open(config_file) as general_config:
config = safe_load(general_config)
self._config_dir = path.dirname(path.abspath(config_file)) + path.sep
logging.config.fileConfig(self._config_dir + "logs.conf")
global log
log = logging.getLogger('service')
self.available_connectors = {}
self.__connector_incoming_messages = {}
self.__connected_devices = {}
self.__saved_devices = {}
self.__events = []
self.name = ''.join(choice(ascii_lowercase) for _ in range(64))
self.__rpc_requests_in_progress = {}
self.__connected_devices_file = "connected_devices.json"
self.tb_client = TBClient(config["thingsboard"])
self.tb_client.connect()
self.subscribe_to_required_topics()
global main_handler
self.main_handler = main_handler
self.remote_handler = TBLoggerHandler(self)
self.main_handler.setTarget(self.remote_handler)
self._default_connectors = {
"mqtt": "MqttConnector",
"modbus": "ModbusConnector",
"opcua": "OpcUaConnector",
"ble": "BLEConnector",
}
self._implemented_connectors = {}
self._event_storage_types = {
"memory": MemoryEventStorage,
"file": FileEventStorage,
}
self._event_storage = self._event_storage_types[
config["storage"]["type"]](config["storage"])
self.connectors_configs = {}
self._load_connectors(config)
self._connect_with_connectors()
self.__remote_configurator = None
self.__request_config_after_connect = False
if config["thingsboard"].get("remoteConfiguration"):
try:
self.__remote_configurator = RemoteConfigurator(self, config)
except Exception as e:
log.exception(e)
if self.__remote_configurator is not None:
self.__remote_configurator.send_current_configuration()
self.__load_persistent_devices()
self.__published_events = Queue(0)
self.__send_thread = Thread(target=self.__read_data_from_storage,
daemon=True,
name="Send data to Thingsboard Thread")
self.__send_thread.start()
try:
gateway_statistic_send = 0
while True:
cur_time = time.time() * 1000
if self.__rpc_requests_in_progress and self.tb_client.is_connected(
):
for rpc_in_progress, data in self.__rpc_requests_in_progress.items(
):
if cur_time >= data[1]:
data[2](rpc_in_progress)
self.cancel_rpc_request(rpc_in_progress)
self.__rpc_requests_in_progress[
rpc_in_progress] = "del"
new_rpc_request_in_progress = {
key: value
for key, value in
self.__rpc_requests_in_progress.items()
if value != 'del'
}
self.__rpc_requests_in_progress = new_rpc_request_in_progress
else:
try:
time.sleep(1)
except Exception as e:
log.exception(e)
break
if not self.__request_config_after_connect and \
self.tb_client.is_connected() and not self.tb_client.client.get_subscriptions_in_progress():
self.__request_config_after_connect = True
self.__check_shared_attributes()
if cur_time - gateway_statistic_send > 60000.0 and self.tb_client.is_connected(
):
summary_messages = self.__form_statistics()
self.tb_client.client.send_telemetry(summary_messages)
gateway_statistic_send = time.time() * 1000
# self.__check_shared_attributes()
except KeyboardInterrupt:
log.info("Stopping...")
self.__close_connectors()
log.info("The gateway has been stopped.")
self.tb_client.stop()
except Exception as e:
log.exception(e)
self.__close_connectors()
log.info("The gateway has been stopped.")
self.tb_client.stop()
def __close_connectors(self):
for current_connector in self.available_connectors:
try:
self.available_connectors[current_connector].close()
log.debug("Connector %s closed connection.", current_connector)
except Exception as e:
log.exception(e)
def __stop_gateway(self):
pass
def _attributes_parse(self, content, *args):
try:
log.debug("Received data: %s", content)
log.debug(args)
if content is not None:
shared_attributes = content.get("shared")
client_attributes = content.get("client")
new_configuration = shared_attributes.get(
"configuration"
) if shared_attributes is not None and shared_attributes.get(
"configuration") is not None else content.get(
"configuration")
if new_configuration is not None and self.__remote_configurator is not None:
try:
confirmed = self.__remote_configurator.process_configuration(
new_configuration)
if confirmed:
self.__send_thread = Thread(
target=self.__read_data_from_storage,
daemon=True,
name="Send data to Thingsboard Thread")
self.__send_thread.start()
self.__remote_configurator.send_current_configuration()
except Exception as e:
log.exception(e)
remote_logging_level = shared_attributes.get(
'RemoteLoggingLevel'
) if shared_attributes is not None else content.get(
"RemoteLoggingLevel")
if remote_logging_level == 'NONE':
self.remote_handler.deactivate()
log.info('Remote logging has being deactivated.')
elif remote_logging_level is not None:
if self.remote_handler.current_log_level != remote_logging_level or not self.remote_handler.activated:
self.remote_handler.activate(remote_logging_level)
log.info(
'Remote logging has being updated. Current logging level is: %s ',
remote_logging_level)
if shared_attributes is not None:
log.debug(
"Shared attributes received (%s).",
", ".join([attr for attr in shared_attributes.keys()]))
if client_attributes is not None:
log.debug(
"Client attributes received (%s).",
", ".join([attr for attr in client_attributes.keys()]))
except Exception as e:
log.exception(e)
def get_config_path(self):
return self._config_dir
def subscribe_to_required_topics(self):
self.tb_client.client.gw_set_server_side_rpc_request_handler(
self._rpc_request_handler)
self.tb_client.client.set_server_side_rpc_request_handler(
self._rpc_request_handler)
self.tb_client.client.subscribe_to_all_attributes(
self._attribute_update_callback)
self.tb_client.client.gw_subscribe_to_all_attributes(
self._attribute_update_callback)
def __check_shared_attributes(self):
self.tb_client.client.request_attributes(
callback=self._attributes_parse)
def _load_connectors(self, main_config):
self.connectors_configs = {}
if not main_config.get("connectors"):
raise Exception(
"Configuration for connectors not found, check your config file."
)
for connector in main_config['connectors']:
try:
connector_class = TBUtility.check_and_import(
connector["type"],
self._default_connectors.get(connector["type"],
connector.get("class")))
self._implemented_connectors[
connector["type"]] = connector_class
with open(self._config_dir + connector['configuration'],
'r') as conf_file:
connector_conf = load(conf_file)
if not self.connectors_configs.get(connector['type']):
self.connectors_configs[connector['type']] = []
self.connectors_configs[connector['type']].append({
"name":
connector["name"],
"config": {
connector['configuration']: connector_conf
}
})
except Exception as e:
log.error("Error on loading connector:")
log.exception(e)
def _connect_with_connectors(self):
for connector_type in self.connectors_configs:
for connector_config in self.connectors_configs[connector_type]:
for config in connector_config["config"]:
connector = None
try:
connector = self._implemented_connectors[
connector_type](self,
connector_config["config"][config],
connector_type)
connector.setName(connector_config["name"])
self.available_connectors[
connector.get_name()] = connector
connector.open()
except Exception as e:
log.exception(e)
if connector is not None:
connector.close()
def send_to_storage(self, connector_name, data):
if not connector_name == self.name:
if not TBUtility.validate_converted_data(data):
log.error("Data from %s connector is invalid.", connector_name)
return
if data["deviceName"] not in self.get_devices():
self.add_device(
data["deviceName"],
{"connector": self.available_connectors[connector_name]},
wait_for_publish=True)
if not self.__connector_incoming_messages.get(connector_name):
self.__connector_incoming_messages[connector_name] = 0
else:
self.__connector_incoming_messages[connector_name] += 1
telemetry = {}
telemetry_with_ts = []
for item in data["telemetry"]:
if item.get("ts") is None:
telemetry = {**telemetry, **item}
else:
telemetry_with_ts.append({
"ts": item["ts"],
"values": {
**item["values"]
}
})
if telemetry_with_ts:
data["telemetry"] = telemetry_with_ts
else:
data["telemetry"] = {
"ts": int(time.time() * 1000),
"values": telemetry
}
json_data = dumps(data)
save_result = self._event_storage.put(json_data)
if not save_result:
log.error(
'Data from the device "%s" cannot be saved, connector name is %s.',
data["deviceName"], connector_name)
def check_size(self, size, devices_data_in_event_pack):
if size >= 48000:
self.__send_data(devices_data_in_event_pack)
size = 0
return size
def __read_data_from_storage(self):
devices_data_in_event_pack = {}
log.debug("Send data Thread has been started successfully.")
while True:
try:
if self.tb_client.is_connected():
size = getsizeof(devices_data_in_event_pack)
events = self._event_storage.get_event_pack()
if events:
for event in events:
try:
current_event = loads(event)
except Exception as e:
log.exception(e)
continue
if not devices_data_in_event_pack.get(
current_event["deviceName"]):
devices_data_in_event_pack[
current_event["deviceName"]] = {
"telemetry": [],
"attributes": {}
}
if current_event.get("telemetry"):
if type(current_event["telemetry"]) == list:
for item in current_event["telemetry"]:
size += getsizeof(item)
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[
current_event["deviceName"]][
"telemetry"].append(item)
else:
if not self.tb_client.is_connected(): break
size += getsizeof(
current_event["telemetry"])
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[current_event[
"deviceName"]]["telemetry"].append(
current_event["telemetry"])
if current_event.get("attributes"):
if type(current_event["attributes"]) == list:
for item in current_event["attributes"]:
if not self.tb_client.is_connected():
break
size += getsizeof(item)
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[
current_event["deviceName"]][
"attributes"].update(
item.items())
else:
if not self.tb_client.is_connected(): break
size += getsizeof(
current_event["attributes"].items())
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[current_event[
"deviceName"]]["attributes"].update(
current_event["attributes"].items(
))
if devices_data_in_event_pack:
if not self.tb_client.is_connected(): break
self.__send_data(devices_data_in_event_pack)
if self.tb_client.is_connected():
success = True
while not self.__published_events.empty():
event = self.__published_events.get()
try:
success = event.get(
) == event.TB_ERR_SUCCESS
except Exception as e:
log.exception(e)
success = False
if success:
self._event_storage.event_pack_processing_done(
)
del devices_data_in_event_pack
devices_data_in_event_pack = {}
else:
continue
else:
time.sleep(.01)
else:
time.sleep(.1)
except Exception as e:
log.exception(e)
time.sleep(1)
def __send_data(self, devices_data_in_event_pack):
try:
for device in devices_data_in_event_pack:
if devices_data_in_event_pack[device].get("attributes"):
if device == self.name:
self.__published_events.put(
self.tb_client.client.send_attributes(
devices_data_in_event_pack[device]
["attributes"]))
else:
self.__published_events.put(
self.tb_client.client.gw_send_attributes(
device, devices_data_in_event_pack[device]
["attributes"]))
if devices_data_in_event_pack[device].get("telemetry"):
if device == self.name:
self.__published_events.put(
self.tb_client.client.send_telemetry(
devices_data_in_event_pack[device]
["telemetry"]))
else:
self.__published_events.put(
self.tb_client.client.gw_send_telemetry(
device, devices_data_in_event_pack[device]
["telemetry"]))
devices_data_in_event_pack[device] = {
"telemetry": [],
"attributes": {}
}
except Exception as e:
log.exception(e)
def _rpc_request_handler(self, _, content):
try:
device = content.get("device")
if device is not None:
connector = self.get_devices()[device].get("connector")
if connector is not None:
connector.server_side_rpc_handler(content)
else:
log.error(
"Received RPC request but connector for the device %s not found. Request data: \n %s",
content["device"], dumps(content))
else:
log.debug("RPC request with no device param.")
log.debug(content)
except Exception as e:
log.exception(e)
def rpc_with_reply_processing(self, topic, content):
req_id = self.__rpc_requests_in_progress[topic][0]["data"]["id"]
device = self.__rpc_requests_in_progress[topic][0]["device"]
self.send_rpc_reply(device, req_id, content)
self.cancel_rpc_request(topic)
def send_rpc_reply(self,
device=None,
req_id=None,
content=None,
success_sent=None):
if success_sent is not None:
rpc_response = {"success": False}
if success_sent:
rpc_response["success"] = True
self.tb_client.client.gw_send_rpc_reply(device, req_id,
rpc_response)
elif device is not None and req_id is not None and content is not None:
self.tb_client.client.gw_send_rpc_reply(device, req_id, content)
def register_rpc_request_timeout(self, content, timeout, topic,
cancel_method):
self.__rpc_requests_in_progress[topic] = (content, timeout,
cancel_method)
def cancel_rpc_request(self, rpc_request):
content = self.__rpc_requests_in_progress[rpc_request][0]
self.send_rpc_reply(device=content["device"],
req_id=content["data"]["id"],
success_sent=False)
def _attribute_update_callback(self, content, *args):
log.debug("Attribute request received with content: \"%s\"", content)
log.debug(args)
if content.get('device') is not None:
try:
self.__connected_devices[content["device"]][
"connector"].on_attributes_update(content)
except Exception as e:
log.exception(e)
else:
self._attributes_parse(content)
def __form_statistics(self):
summary_messages = {"eventsProduced": 0, "eventsSent": 0}
telemetry = {}
for connector in self.available_connectors:
if self.available_connectors[connector].is_connected():
connector_camel_case = connector[0].lower(
) + connector[1:].replace(' ', '')
telemetry[(connector_camel_case + ' EventsProduced').replace(' ', '')] = \
self.available_connectors[connector].statistics['MessagesReceived']
telemetry[(connector_camel_case + ' EventsSent').replace(' ', '')] = \
self.available_connectors[connector].statistics['MessagesSent']
self.tb_client.client.send_telemetry(telemetry)
summary_messages['eventsProduced'] += telemetry[str(
connector_camel_case + ' EventsProduced').replace(' ', '')]
summary_messages['eventsSent'] += telemetry[str(
connector_camel_case + ' EventsSent').replace(' ', '')]
return summary_messages
def add_device(self, device_name, content, wait_for_publish=False):
if device_name not in self.__saved_devices:
self.__connected_devices[device_name] = content
self.__saved_devices[device_name] = content
if wait_for_publish:
self.tb_client.client.gw_connect_device(
device_name).wait_for_publish()
else:
self.tb_client.client.gw_connect_device(device_name)
self.__save_persistent_devices()
def update_device(self, device_name, event, content):
if event == 'connector' and self.__connected_devices[device_name].get(
event) != content:
self.__connected_devices[device_name][event] = content
self.__save_persistent_devices()
else:
self.__save_persistent_devices()
def del_device(self, device_name):
del self.__connected_devices[device_name]
self.tb_client.client.gw_disconnect_device(device_name)
self.__save_persistent_devices()
def get_devices(self):
return self.__connected_devices
def __load_persistent_devices(self):
devices = {}
if self.__connected_devices_file in listdir(self._config_dir) and \
path.getsize(self._config_dir + self.__connected_devices_file) > 0:
try:
with open(self._config_dir +
self.__connected_devices_file) as devices_file:
devices = load(devices_file)
except Exception as e:
log.exception(e)
else:
connected_devices_file = open(
self._config_dir + self.__connected_devices_file, 'w')
connected_devices_file.close()
if devices is not None:
log.debug("Loaded devices:\n %s", devices)
for device_name in devices:
try:
if self.available_connectors.get(devices[device_name]):
self.__connected_devices[device_name] = {
"connector":
self.available_connectors[devices[device_name]]
}
else:
log.warning(
"Device %s connector not found, maybe it had been disabled.",
device_name)
except Exception as e:
log.exception(e)
continue
else:
log.debug("No device found in connected device file.")
self.__connected_devices = {} if self.__connected_devices is None else self.__connected_devices
def __save_persistent_devices(self):
print("__save_persistent_devices", self.__connected_devices)
with open(self._config_dir + self.__connected_devices_file,
'w') as config_file:
try:
data_to_save = {}
for device in self.__connected_devices:
if self.__connected_devices[device][
"connector"] is not None:
data_to_save[device] = self.__connected_devices[
device]["connector"].get_name()
config_file.write(dumps(data_to_save, indent=2,
sort_keys=True))
except Exception as e:
log.exception(e)
log.debug("Saved connected devices.")
class TBGatewayService:
def __init__(self, config_file=None):
self.__lock = RLock()
if config_file is None:
config_file = path.dirname(path.dirname(
path.abspath(__file__))) + '/config/tb_gateway.yaml'.replace(
'/', path.sep)
with open(config_file) as general_config:
config = safe_load(general_config)
self._config_dir = path.dirname(path.abspath(config_file)) + path.sep
logging.config.fileConfig(self._config_dir + "logs.conf")
global log
log = logging.getLogger('service')
log.info("Gateway starting...")
self.version = get_distribution('thingsboard_gateway').version
log.info("ThingsBoard IoT gateway version: %s", self.version)
self.available_connectors = {}
self.__connector_incoming_messages = {}
self.__connected_devices = {}
self.__saved_devices = {}
self.__events = []
self.name = ''.join(choice(ascii_lowercase) for _ in range(64))
self.__rpc_requests_in_progress = {}
self.__connected_devices_file = "connected_devices.json"
self.tb_client = TBClient(config["thingsboard"])
self.tb_client.connect()
self.subscribe_to_required_topics()
self.counter = 0
self.__rpc_reply_sent = False
global main_handler
self.main_handler = main_handler
self.remote_handler = TBLoggerHandler(self)
self.main_handler.setTarget(self.remote_handler)
self._default_connectors = {
"mqtt": "MqttConnector",
"modbus": "ModbusConnector",
"opcua": "OpcUaConnector",
"ble": "BLEConnector",
"request": "RequestConnector",
"can": "CanConnector"
}
self._implemented_connectors = {}
self._event_storage_types = {
"memory": MemoryEventStorage,
"file": FileEventStorage,
}
self.__gateway_rpc_methods = {
"ping": self.__rpc_ping,
"stats": self.__form_statistics,
"devices": self.__rpc_devices,
}
self.__sheduled_rpc_calls = []
self.__self_rpc_sheduled_methods_functions = {
"restart": {
"function": execv,
"arguments":
(executable, [executable.split(pathsep)[-1]] + argv)
},
"reboot": {
"function": system,
"arguments": ("reboot 0", )
},
}
self._event_storage = self._event_storage_types[
config["storage"]["type"]](config["storage"])
self.connectors_configs = {}
self._load_connectors(config)
self._connect_with_connectors()
self.__remote_configurator = None
self.__request_config_after_connect = False
if config["thingsboard"].get("remoteConfiguration"):
try:
self.__remote_configurator = RemoteConfigurator(self, config)
except Exception as e:
log.exception(e)
if self.__remote_configurator is not None:
self.__remote_configurator.send_current_configuration()
self.__load_persistent_devices()
self._published_events = Queue(-1)
self._send_thread = Thread(target=self.__read_data_from_storage,
daemon=True,
name="Send data to Thingsboard Thread")
self._send_thread.start()
log.info("Gateway started.")
try:
gateway_statistic_send = 0
while True:
cur_time = time() * 1000
if self.__sheduled_rpc_calls:
for rpc_call_index in range(len(
self.__sheduled_rpc_calls)):
rpc_call = self.__sheduled_rpc_calls[rpc_call_index]
if cur_time > rpc_call[0]:
rpc_call = self.__sheduled_rpc_calls.pop(
rpc_call_index)
result = None
try:
result = rpc_call[1]["function"](
*rpc_call[1]["arguments"])
except Exception as e:
log.exception(e)
if result == 256:
log.warning(
"Error on RPC command: 256. Permission denied."
)
if self.__rpc_requests_in_progress and self.tb_client.is_connected(
):
for rpc_in_progress, data in self.__rpc_requests_in_progress.items(
):
if cur_time >= data[1]:
data[2](rpc_in_progress)
self.cancel_rpc_request(rpc_in_progress)
self.__rpc_requests_in_progress[
rpc_in_progress] = "del"
new_rpc_request_in_progress = {
key: value
for key, value in
self.__rpc_requests_in_progress.items()
if value != 'del'
}
self.__rpc_requests_in_progress = new_rpc_request_in_progress
else:
try:
sleep(.1)
except Exception as e:
log.exception(e)
break
if not self.__request_config_after_connect and self.tb_client.is_connected(
) and not self.tb_client.client.get_subscriptions_in_progress(
):
self.__request_config_after_connect = True
self.__check_shared_attributes()
if cur_time - gateway_statistic_send > 5000.0 and self.tb_client.is_connected(
):
summary_messages = self.__form_statistics()
# with self.__lock:
self.tb_client.client.send_telemetry(summary_messages)
gateway_statistic_send = time() * 1000
# self.__check_shared_attributes()
except KeyboardInterrupt:
log.info("Stopping...")
self.__close_connectors()
log.info("The gateway has been stopped.")
self.tb_client.stop()
except Exception as e:
log.exception(e)
self.__close_connectors()
log.info("The gateway has been stopped.")
self.tb_client.stop()
def __close_connectors(self):
for current_connector in self.available_connectors:
try:
self.available_connectors[current_connector].close()
log.debug("Connector %s closed connection.", current_connector)
except Exception as e:
log.exception(e)
def __stop_gateway(self):
pass
def _attributes_parse(self, content, *args):
try:
log.debug("Received data: %s", content)
log.debug(args)
if content is not None:
shared_attributes = content.get("shared")
client_attributes = content.get("client")
new_configuration = shared_attributes.get(
"configuration"
) if shared_attributes is not None and shared_attributes.get(
"configuration") is not None else content.get(
"configuration")
if new_configuration is not None and self.__remote_configurator is not None:
try:
confirmed = self.__remote_configurator.process_configuration(
new_configuration)
# if confirmed:
# self._send_thread = Thread(target=self.__read_data_from_storage, daemon=True,
# name="Send data to Thingsboard Thread")
# self._send_thread.start()
self.__remote_configurator.send_current_configuration()
except Exception as e:
log.exception(e)
remote_logging_level = shared_attributes.get(
'RemoteLoggingLevel'
) if shared_attributes is not None else content.get(
"RemoteLoggingLevel")
if remote_logging_level == 'NONE':
self.remote_handler.deactivate()
log.info('Remote logging has being deactivated.')
elif remote_logging_level is not None:
if self.remote_handler.current_log_level != remote_logging_level or not self.remote_handler.activated:
self.main_handler.setLevel(remote_logging_level)
self.remote_handler.activate(remote_logging_level)
log.info(
'Remote logging has being updated. Current logging level is: %s ',
remote_logging_level)
if shared_attributes is not None:
log.debug(
"Shared attributes received (%s).",
", ".join([attr for attr in shared_attributes.keys()]))
if client_attributes is not None:
log.debug(
"Client attributes received (%s).",
", ".join([attr for attr in client_attributes.keys()]))
except Exception as e:
log.exception(e)
def get_config_path(self):
return self._config_dir
def subscribe_to_required_topics(self):
self.tb_client.client.gw_set_server_side_rpc_request_handler(
self._rpc_request_handler)
self.tb_client.client.set_server_side_rpc_request_handler(
self._rpc_request_handler)
self.tb_client.client.subscribe_to_all_attributes(
self._attribute_update_callback)
self.tb_client.client.gw_subscribe_to_all_attributes(
self._attribute_update_callback)
def __check_shared_attributes(self):
self.tb_client.client.request_attributes(
callback=self._attributes_parse)
def _load_connectors(self, main_config):
self.connectors_configs = {}
if main_config.get("connectors"):
for connector in main_config['connectors']:
try:
connector_class = TBUtility.check_and_import(
connector["type"],
self._default_connectors.get(connector["type"],
connector.get("class")))
self._implemented_connectors[
connector["type"]] = connector_class
with open(self._config_dir + connector['configuration'],
'r') as conf_file:
connector_conf = load(conf_file)
if not self.connectors_configs.get(connector['type']):
self.connectors_configs[connector['type']] = []
connector_conf["name"] = connector["name"]
self.connectors_configs[connector['type']].append({
"name":
connector["name"],
"config": {
connector['configuration']: connector_conf
}
})
except Exception as e:
log.error("Error on loading connector:")
log.exception(e)
else:
log.error("Connectors - not found! Check your configuration!")
main_config["remoteConfiguration"] = True
log.info("Remote configuration is enabled forcibly!")
def _connect_with_connectors(self):
for connector_type in self.connectors_configs:
for connector_config in self.connectors_configs[connector_type]:
for config in connector_config["config"]:
connector = None
try:
connector = self._implemented_connectors[
connector_type](self,
connector_config["config"][config],
connector_type)
connector.setName(connector_config["name"])
self.available_connectors[
connector.get_name()] = connector
connector.open()
except Exception as e:
log.exception(e)
if connector is not None:
connector.close()
def send_to_storage(self, connector_name, data):
if not connector_name == self.name:
if not TBUtility.validate_converted_data(data):
log.error("Data from %s connector is invalid.", connector_name)
return None
if data["deviceName"] not in self.get_devices():
self.add_device(
data["deviceName"],
{"connector": self.available_connectors[connector_name]},
wait_for_publish=True,
device_type=data["deviceType"])
if not self.__connector_incoming_messages.get(connector_name):
self.__connector_incoming_messages[connector_name] = 0
else:
self.__connector_incoming_messages[connector_name] += 1
telemetry = {}
telemetry_with_ts = []
for item in data["telemetry"]:
if item.get("ts") is None:
telemetry = {**telemetry, **item}
else:
telemetry_with_ts.append({
"ts": item["ts"],
"values": {
**item["values"]
}
})
if telemetry_with_ts:
data["telemetry"] = telemetry_with_ts
else:
data["telemetry"] = {"ts": int(time() * 1000), "values": telemetry}
json_data = dumps(data)
save_result = self._event_storage.put(json_data)
if not save_result:
log.error(
'Data from the device "%s" cannot be saved, connector name is %s.',
data["deviceName"], connector_name)
def check_size(self, size, devices_data_in_event_pack):
if size >= 48000:
self.__send_data(devices_data_in_event_pack)
size = 0
return size
def __read_data_from_storage(self):
devices_data_in_event_pack = {}
log.debug("Send data Thread has been started successfully.")
while True:
try:
if self.tb_client.is_connected():
size = getsizeof(devices_data_in_event_pack)
events = []
if self.__remote_configurator is None or not self.__remote_configurator.in_process:
events = self._event_storage.get_event_pack()
if events:
for event in events:
self.counter += 1
try:
current_event = loads(event)
except Exception as e:
log.exception(e)
continue
if not devices_data_in_event_pack.get(
current_event["deviceName"]):
devices_data_in_event_pack[
current_event["deviceName"]] = {
"telemetry": [],
"attributes": {}
}
if current_event.get("telemetry"):
if isinstance(current_event["telemetry"],
list):
for item in current_event["telemetry"]:
size += getsizeof(item)
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[
current_event["deviceName"]][
"telemetry"].append(item)
else:
size += getsizeof(
current_event["telemetry"])
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[current_event[
"deviceName"]]["telemetry"].append(
current_event["telemetry"])
if current_event.get("attributes"):
if isinstance(current_event["attributes"],
list):
for item in current_event["attributes"]:
size += getsizeof(item)
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[
current_event["deviceName"]][
"attributes"].update(
item.items())
else:
size += getsizeof(
current_event["attributes"].items())
size = self.check_size(
size, devices_data_in_event_pack)
devices_data_in_event_pack[current_event[
"deviceName"]]["attributes"].update(
current_event["attributes"].items(
))
if devices_data_in_event_pack:
if not self.tb_client.is_connected():
continue
while self.__rpc_reply_sent:
sleep(.01)
self.__send_data(devices_data_in_event_pack)
if self.tb_client.is_connected() and (
self.__remote_configurator is None
or not self.__remote_configurator.in_process):
success = True
while not self._published_events.empty():
if (self.__remote_configurator is not None and self.__remote_configurator.in_process) or \
not self.tb_client.is_connected() or \
self._published_events.empty() or \
self.__rpc_reply_sent:
success = False
break
event = self._published_events.get(False, 10)
try:
if self.tb_client.is_connected() and (
self.__remote_configurator is None
or not self.__remote_configurator.
in_process):
success = event.get(
) == event.TB_ERR_SUCCESS
else:
break
except Exception as e:
log.exception(e)
success = False
sleep(.01)
if success:
self._event_storage.event_pack_processing_done(
)
del devices_data_in_event_pack
devices_data_in_event_pack = {}
else:
continue
else:
sleep(.01)
else:
sleep(.1)
except Exception as e:
log.exception(e)
sleep(1)
def __send_data(self, devices_data_in_event_pack):
try:
for device in devices_data_in_event_pack:
if devices_data_in_event_pack[device].get("attributes"):
if device == self.name:
self._published_events.put(
self.tb_client.client.send_attributes(
devices_data_in_event_pack[device]
["attributes"]))
else:
self._published_events.put(
self.tb_client.client.gw_send_attributes(
device, devices_data_in_event_pack[device]
["attributes"]))
if devices_data_in_event_pack[device].get("telemetry"):
if device == self.name:
self._published_events.put(
self.tb_client.client.send_telemetry(
devices_data_in_event_pack[device]
["telemetry"]))
else:
self._published_events.put(
self.tb_client.client.gw_send_telemetry(
device, devices_data_in_event_pack[device]
["telemetry"]))
devices_data_in_event_pack[device] = {
"telemetry": [],
"attributes": {}
}
except Exception as e:
log.exception(e)
def _rpc_request_handler(self, request_id, content):
try:
device = content.get("device")
if device is not None:
connector_name = self.get_devices()[device].get("connector")
if connector_name is not None:
connector_name.server_side_rpc_handler(content)
else:
log.error(
"Received RPC request but connector for the device %s not found. Request data: \n %s",
content["device"], dumps(content))
else:
try:
method_split = content["method"].split('_')
module = None
if len(method_split) > 0:
module = method_split[0]
if module is not None:
result = None
if self.connectors_configs.get(module):
log.debug(
"Connector \"%s\" for RPC request \"%s\" found",
module, content["method"])
for connector_name in self.available_connectors:
if self.available_connectors[
connector_name]._connector_type == module:
log.debug(
"Sending command RPC %s to connector %s",
content["method"], connector_name)
result = self.available_connectors[
connector_name].server_side_rpc_handler(
content)
elif module == 'gateway':
result = self.__rpc_gateway_processing(
request_id, content)
else:
log.error("Connector \"%s\" not found", module)
result = {
"error":
"%s - connector not found in available connectors."
% module,
"code":
404
}
if result is None:
self.send_rpc_reply(None,
request_id,
success_sent=False)
else:
self.send_rpc_reply(None, request_id,
dumps(result))
except Exception as e:
self.send_rpc_reply(
None, request_id,
"{\"error\":\"%s\", \"code\": 500}" % str(e))
log.exception(e)
except Exception as e:
log.exception(e)
def __rpc_gateway_processing(self, request_id, content):
log.info("Received RPC request to the gateway, id: %s, method: %s",
str(request_id), content["method"])
arguments = content.get('params')
method_to_call = content["method"].replace("gateway_", "")
result = None
if isinstance(arguments, list):
result = self.__gateway_rpc_methods[method_to_call](*arguments)
elif method_to_call in self.__self_rpc_sheduled_methods_functions:
seconds_to_restart = arguments * 1000 if arguments else 0
self.__sheduled_rpc_calls.append([
time() * 1000 + seconds_to_restart,
self.__self_rpc_sheduled_methods_functions[method_to_call]
])
log.info("Gateway %s sheduled in %i seconds", method_to_call,
seconds_to_restart / 1000)
result = {"success": True}
elif arguments is not None:
result = self.__gateway_rpc_methods[method_to_call]()
else:
result = self.__gateway_rpc_methods[method_to_call]()
return result
def __rpc_ping(self, *args):
return {"code": 200, "resp": "pong"}
def __rpc_devices(self, *args):
data_to_send = {}
for device in self.__connected_devices:
if self.__connected_devices[device]["connector"] is not None:
data_to_send[device] = self.__connected_devices[device][
"connector"].get_name()
return {"code": 200, "resp": data_to_send}
def rpc_with_reply_processing(self, topic, content):
req_id = self.__rpc_requests_in_progress[topic][0]["data"]["id"]
device = self.__rpc_requests_in_progress[topic][0]["device"]
self.send_rpc_reply(device, req_id, content)
self.cancel_rpc_request(topic)
def send_rpc_reply(self,
device=None,
req_id=None,
content=None,
success_sent=None,
wait_for_publish=None,
quality_of_service=0):
try:
self.__rpc_reply_sent = True
rpc_response = {"success": False}
if success_sent is not None:
if success_sent:
rpc_response["success"] = True
if device is not None and success_sent is not None:
self.tb_client.client.gw_send_rpc_reply(
device,
req_id,
dumps(rpc_response),
quality_of_service=quality_of_service)
elif device is not None and req_id is not None and content is not None:
self.tb_client.client.gw_send_rpc_reply(
device,
req_id,
content,
quality_of_service=quality_of_service)
elif device is None and success_sent is not None:
self.tb_client.client.send_rpc_reply(
req_id,
dumps(rpc_response),
quality_of_service=quality_of_service,
wait_for_publish=wait_for_publish)
elif device is None and content is not None:
self.tb_client.client.send_rpc_reply(
req_id,
content,
quality_of_service=quality_of_service,
wait_for_publish=wait_for_publish)
self.__rpc_reply_sent = False
except Exception as e:
log.exception(e)
def register_rpc_request_timeout(self, content, timeout, topic,
cancel_method):
self.__rpc_requests_in_progress[topic] = (content, timeout,
cancel_method)
def cancel_rpc_request(self, rpc_request):
content = self.__rpc_requests_in_progress[rpc_request][0]
self.send_rpc_reply(device=content["device"],
req_id=content["data"]["id"],
success_sent=False)
def _attribute_update_callback(self, content, *args):
log.debug("Attribute request received with content: \"%s\"", content)
log.debug(args)
if content.get('device') is not None:
try:
self.__connected_devices[content["device"]][
"connector"].on_attributes_update(content)
except Exception as e:
log.exception(e)
else:
self._attributes_parse(content)
def __form_statistics(self):
summary_messages = {"eventsProduced": 0, "eventsSent": 0}
telemetry = {}
for connector in self.available_connectors:
connector_camel_case = connector.lower().replace(' ', '')
telemetry[(connector_camel_case + ' EventsProduced').replace(' ', '')] = \
self.available_connectors[connector].statistics['MessagesReceived']
self.available_connectors[connector].statistics[
'MessagesReceived'] = 0
telemetry[(connector_camel_case + ' EventsSent').replace(' ', '')] = \
self.available_connectors[connector].statistics['MessagesSent']
self.available_connectors[connector].statistics['MessagesSent'] = 0
summary_messages['eventsProduced'] += telemetry[str(
connector_camel_case + ' EventsProduced').replace(' ', '')]
summary_messages['eventsSent'] += telemetry[str(
connector_camel_case + ' EventsSent').replace(' ', '')]
summary_messages.update(**telemetry)
return summary_messages
def add_device(self,
device_name,
content,
wait_for_publish=False,
device_type=None):
if device_name not in self.__saved_devices:
self.__connected_devices[device_name] = content
self.__saved_devices[device_name] = content
device_type = device_type if device_type is not None else 'default'
if wait_for_publish:
self.tb_client.client.gw_connect_device(
device_name, device_type).wait_for_publish()
else:
self.tb_client.client.gw_connect_device(
device_name, device_type)
self.__save_persistent_devices()
def update_device(self, device_name, event, content):
if event == 'connector' and self.__connected_devices[device_name].get(
event) != content:
self.__save_persistent_devices()
self.__connected_devices[device_name][event] = content
def del_device(self, device_name):
del self.__connected_devices[device_name]
del self.__saved_devices[device_name]
self.tb_client.client.gw_disconnect_device(device_name)
self.__save_persistent_devices()
def get_devices(self):
return self.__connected_devices
def __load_persistent_devices(self):
devices = {}
if self.__connected_devices_file in listdir(self._config_dir) and \
path.getsize(self._config_dir + self.__connected_devices_file) > 0:
try:
with open(self._config_dir +
self.__connected_devices_file) as devices_file:
devices = load(devices_file)
except Exception as e:
log.exception(e)
else:
connected_devices_file = open(
self._config_dir + self.__connected_devices_file, 'w')
connected_devices_file.close()
if devices is not None:
log.debug("Loaded devices:\n %s", devices)
for device_name in devices:
try:
if self.available_connectors.get(devices[device_name]):
self.__connected_devices[device_name] = {
"connector":
self.available_connectors[devices[device_name]]
}
else:
log.info(
"Pair device %s - connector %s from persistent device storage - not found.",
device_name, devices[device_name])
except Exception as e:
log.exception(e)
continue
else:
log.debug("No device found in connected device file.")
self.__connected_devices = {} if self.__connected_devices is None else self.__connected_devices
def __save_persistent_devices(self):
with open(self._config_dir + self.__connected_devices_file,
'w') as config_file:
try:
data_to_save = {}
for device in self.__connected_devices:
if self.__connected_devices[device][
"connector"] is not None:
data_to_save[device] = self.__connected_devices[
device]["connector"].get_name()
config_file.write(dumps(data_to_save, indent=2,
sort_keys=True))
except Exception as e:
log.exception(e)
log.debug("Saved connected devices.")
class TBGatewayService:
def __init__(self, config_file=None):
if config_file is None:
config_file = path.dirname(path.dirname(
path.abspath(__file__))) + '/config/tb_gateway.yaml'
with open(config_file) as config:
config = safe_load(config)
self.__config_dir = path.dirname(path.abspath(config_file)) + '/'
logging.config.fileConfig(self.__config_dir + "logs.conf")
global log
log = logging.getLogger('service')
self.available_connectors = {}
self.__connector_incoming_messages = {}
self.__connected_devices = {}
self.__saved_devices = {}
self.__events = []
self.__rpc_requests_in_progress = {}
self.__connected_devices_file = "connected_devices.json"
self.tb_client = TBClient(config["thingsboard"])
self.main_handler = logging.handlers.MemoryHandler(1000)
self.remote_handler = TBLoggerHandler(self)
self.main_handler.setTarget(self.remote_handler)
self.__default_connectors = {
"mqtt": "MqttConnector",
"modbus": "ModbusConnector",
"opcua": "OpcUaConnector",
"ble": "BLEConnector",
}
self.__implemented_connectors = {}
self.__event_storage_types = {
"memory": MemoryEventStorage,
"file": FileEventStorage,
}
self.__load_connectors(config)
self.__connect_with_connectors()
self.__load_persistent_devices()
self.__published_events = Queue(0)
self.__send_thread = Thread(target=self.__read_data_from_storage,
daemon=True,
name="Send data to Thingsboard Thread")
self.__event_storage = self.__event_storage_types[
config["storage"]["type"]](config["storage"])
self.tb_client.connect()
self.tb_client.client.gw_set_server_side_rpc_request_handler(
self.__rpc_request_handler)
self.tb_client.client.set_server_side_rpc_request_handler(
self.__rpc_request_handler)
self.tb_client.client.subscribe_to_all_attributes(
self.__attribute_update_callback)
self.tb_client.client.gw_subscribe_to_all_attributes(
self.__attribute_update_callback)
self.__send_thread.start()
try:
gateway_statistic_send = 0
while True:
cur_time = time.time()
if self.__rpc_requests_in_progress and self.tb_client.is_connected(
):
for rpc_in_progress in self.__rpc_requests_in_progress:
if cur_time >= self.__rpc_requests_in_progress[
rpc_in_progress][1]:
self.__rpc_requests_in_progress[
rpc_in_progress][2](rpc_in_progress)
self.cancel_rpc_request(rpc_in_progress)
time.sleep(0.1)
else:
time.sleep(1)
if cur_time - gateway_statistic_send > 60.0 and self.tb_client.is_connected(
):
summary_messages = {
"eventsProduced": 0,
"eventsSent": 0
}
telemetry = {}
for connector in self.available_connectors:
if self.available_connectors[
connector].is_connected():
connector_camel_case = connector[0].lower(
) + connector[1:].replace(' ', '')
telemetry[(connector_camel_case + ' EventsProduced').replace(' ', '')] = \
self.available_connectors[connector].statistics['MessagesReceived']
telemetry[(connector_camel_case + ' EventsSent').replace(' ', '')] = \
self.available_connectors[connector].statistics['MessagesSent']
self.tb_client.client.send_telemetry(telemetry)
summary_messages[
'eventsProduced'] += telemetry[str(
connector_camel_case +
' EventsProduced').replace(' ', '')]
summary_messages['eventsSent'] += telemetry[
str(connector_camel_case +
' EventsSent').replace(' ', '')]
self.tb_client.client.send_telemetry(summary_messages)
gateway_statistic_send = time.time()
except Exception as e:
log.exception(e)
for device in self.__connected_devices:
log.debug("Close connection for device %s", device)
try:
current_connector = self.__connected_devices[
device].get("connector")
if current_connector is not None:
current_connector.close()
log.debug("Connector %s closed connection.",
current_connector.get_name())
except Exception as e:
log.error(e)
def get_config_path(self):
return self.__config_dir
def __load_connectors(self, config):
self._connectors_configs = {}
if not config.get("connectors"):
raise Exception(
"Configuration for connectors not found, check your config file."
)
for connector in config['connectors']:
try:
if connector.get('class') is not None:
try:
connector_class = TBUtility.check_and_import(
connector['type'], connector['class'])
self.__implemented_connectors[
connector['type']] = connector_class
except Exception as e:
log.error(
"Exception when loading the custom connector:")
log.exception(e)
elif connector.get("type") is not None and connector[
"type"] in self.__default_connectors:
try:
connector_class = TBUtility.check_and_import(
connector["type"],
self.__default_connectors[connector["type"]],
default=True)
self.__implemented_connectors[
connector["type"]] = connector_class
except Exception as e:
log.error("Error on loading default connector:")
log.exception(e)
else:
log.error("Connector with config %s - not found",
safe_dump(connector))
with open(self.__config_dir + connector['configuration'],
'r') as conf_file:
connector_conf = load(conf_file)
if not self._connectors_configs.get(connector['type']):
self._connectors_configs[connector['type']] = []
self._connectors_configs[connector['type']].append(
{connector['configuration']: connector_conf})
except Exception as e:
log.error(e)
def __connect_with_connectors(self):
for connector_type in self._connectors_configs:
for connector_config in self._connectors_configs[connector_type]:
for config_file in connector_config:
connector = None
try:
connector = self.__implemented_connectors[
connector_type](self,
connector_config[config_file],
connector_type)
self.available_connectors[
connector.get_name()] = connector
connector.open()
except Exception as e:
log.exception(e)
if connector is not None:
connector.close()
def __send_statistic(self):
self.tb_client.client.gw_send_telemetry()
def send_to_storage(self, connector_name, data):
self._send_to_storage(connector_name, data)
def _send_to_storage(self, connector_name, data):
if not TBUtility.validate_converted_data(data):
log.error("Data from %s connector is invalid.", connector_name)
return
if data["deviceName"] not in self.get_devices():
self.add_device(
data["deviceName"],
{"connector": self.available_connectors[connector_name]},
wait_for_publish=True)
if not self.__connector_incoming_messages.get(connector_name):
self.__connector_incoming_messages[connector_name] = 0
else:
self.__connector_incoming_messages[connector_name] += 1
telemetry = {}
for item in data["telemetry"]:
telemetry = {**telemetry, **item}
data["telemetry"] = {
"ts": int(time.time() * 1000),
"values": telemetry
}
json_data = dumps(data)
save_result = self.__event_storage.put(json_data)
if not save_result:
log.error(
'Data from device "%s" cannot be saved, connector name is %s.',
data["deviceName"], connector_name)
def __read_data_from_storage(self):
devices_data_in_event_pack = {}
while True:
try:
if self.tb_client.is_connected():
size = getsizeof(devices_data_in_event_pack)
events = self.__event_storage.get_event_pack()
if events:
for event in events:
try:
current_event = loads(event)
except Exception as e:
log.exception(e)
continue
if not devices_data_in_event_pack.get(
current_event["deviceName"]):
devices_data_in_event_pack[
current_event["deviceName"]] = {
"telemetry": [],
"attributes": {}
}
if current_event.get("telemetry"):
if type(current_event["telemetry"]) == list:
for item in current_event["telemetry"]:
size += getsizeof(item)
if size >= 48000:
if not self.tb_client.is_connected(
):
break
self.__send_data(
devices_data_in_event_pack)
size = 0
devices_data_in_event_pack[
current_event["deviceName"]][
"telemetry"].append(item)
else:
if not self.tb_client.is_connected(): break
size += getsizeof(
current_event["telemetry"])
if size >= 48000:
self.__send_data(
devices_data_in_event_pack)
size = 0
devices_data_in_event_pack[current_event[
"deviceName"]]["telemetry"].append(
current_event["telemetry"])
if current_event.get("attributes"):
if type(current_event["attributes"]) == list:
for item in current_event["attributes"]:
if not self.tb_client.is_connected():
break
size += getsizeof(item)
if size >= 48000:
self.__send_data(
devices_data_in_event_pack)
size = 0
devices_data_in_event_pack[
current_event["deviceName"]][
"attributes"].update(
item.items())
else:
if not self.tb_client.is_connected(): break
size += getsizeof(
current_event["attributes"].items())
if size >= 48000:
self.__send_data(
devices_data_in_event_pack)
size = 0
devices_data_in_event_pack[current_event[
"deviceName"]]["attributes"].update(
current_event["attributes"].items(
))
if devices_data_in_event_pack:
if not self.tb_client.is_connected(): break
self.__send_data(devices_data_in_event_pack)
if self.tb_client.is_connected():
success = True
while not self.__published_events.empty():
event = self.__published_events.get()
try:
success = event.get(
) == event.TB_ERR_SUCCESS
except Exception as e:
log.exception(e)
success = False
if success:
self.__event_storage.event_pack_processing_done(
)
del devices_data_in_event_pack
devices_data_in_event_pack = {}
else:
break
else:
time.sleep(.01)
else:
time.sleep(.1)
except Exception as e:
log.exception(e)
time.sleep(1)
def __send_data(self, devices_data_in_event_pack):
for device in devices_data_in_event_pack:
self.__published_events.put(
self.tb_client.client.gw_send_attributes(
device, devices_data_in_event_pack[device]["attributes"]))
self.__published_events.put(
self.tb_client.client.gw_send_telemetry(
device, devices_data_in_event_pack[device]["telemetry"]))
devices_data_in_event_pack[device] = {
"telemetry": [],
"attributes": {}
}
def __rpc_request_handler(self, _, content):
try:
device = content.get("device")
if device is not None:
connector = self.get_devices()[device].get("connector")
if connector is not None:
connector.server_side_rpc_handler(content)
else:
log.error(
"Received RPC request but connector for device %s not found. Request data: \n %s",
content["device"], dumps(content))
else:
log.debug("RPC request with no device param.")
log.debug(content)
except Exception as e:
log.exception(e)
def rpc_with_reply_processing(self, topic, content):
req_id = self.__rpc_requests_in_progress[topic][0]["data"]["id"]
device = self.__rpc_requests_in_progress[topic][0]["device"]
self.send_rpc_reply(device, req_id, content)
self.cancel_rpc_request(topic)
def send_rpc_reply(self, device, req_id, content):
self.tb_client.client.gw_send_rpc_reply(device, req_id, content)
def register_rpc_request_timeout(self, content, timeout, topic,
cancel_method):
self.__rpc_requests_in_progress[topic] = (content, timeout,
cancel_method)
def cancel_rpc_request(self, rpc_request):
del self.__rpc_requests_in_progress[rpc_request]
def __attribute_update_callback(self, content, *args):
if content.get('device') is not None:
try:
self.__connected_devices[content["device"]][
"connector"].on_attributes_update(content)
except Exception as e:
log.error(e)
else:
if content.get('RemoteLoggingLevel') == 'NONE':
self.remote_handler.deactivate()
log.info('Remote logging has being deactivated.')
elif content.get('RemoteLoggingLevel') is not None:
self.remote_handler.activate(content.get('RemoteLoggingLevel'))
log.info('Remote logging has being activated.')
else:
log.debug('Attributes on the gateway has being updated!')
log.debug(args)
log.debug(content)
def add_device(self, device_name, content, wait_for_publish=False):
if device_name not in self.__saved_devices:
self.__connected_devices[device_name] = content
self.__saved_devices[device_name] = content
if wait_for_publish:
self.tb_client.client.gw_connect_device(
device_name).wait_for_publish()
else:
self.tb_client.client.gw_connect_device(device_name)
self.__save_persistent_devices()
def update_device(self, device_name, event, content):
if event == 'connector' and self.__connected_devices[device_name].get(
event) != content:
self.__save_persistent_devices()
self.__connected_devices[device_name][event] = content
def del_device(self, device_name):
del self.__connected_devices[device_name]
self.tb_client.client.gw_disconnect_device(device_name)
self.__save_persistent_devices()
def get_devices(self):
return self.__connected_devices
def __load_persistent_devices(self):
devices = {}
if self.__connected_devices_file in listdir(self.__config_dir) and \
path.getsize(self.__config_dir + self.__connected_devices_file) > 0:
try:
with open(self.__config_dir +
self.__connected_devices_file) as devices_file:
devices = load(devices_file)
except Exception as e:
log.exception(e)
else:
connected_devices_file = open(
self.__config_dir + self.__connected_devices_file, 'w')
connected_devices_file.close()
if devices is not None:
log.debug("Loaded devices:\n %s", devices)
for device_name in devices:
try:
if self.available_connectors.get(devices[device_name]):
self.__connected_devices[device_name] = {
"connector":
self.available_connectors[devices[device_name]]
}
else:
log.warning(
"Device %s connector not found, maybe it had been disabled.",
device_name)
except Exception as e:
log.exception(e)
continue
else:
log.debug("No device found in connected device file.")
self.__connected_devices = {} if self.__connected_devices is None else self.__connected_devices
def __save_persistent_devices(self):
with open(self.__config_dir + self.__connected_devices_file,
'w') as config_file:
try:
data_to_save = {}
for device in self.__connected_devices:
if self.__connected_devices[device][
"connector"] is not None:
data_to_save[device] = self.__connected_devices[
device]["connector"].get_name()
config_file.write(dumps(data_to_save, indent=2,
sort_keys=True))
except Exception as e:
log.exception(e)
log.debug("Saved connected devices.")