mirror of
https://github.com/thingsboard/thingsboard-gateway
synced 2025-10-26 22:31:42 +08:00
250 lines
13 KiB
Python
250 lines
13 KiB
Python
# Copyright 2020. ThingsBoard
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from base64 import b64encode, b64decode
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from simplejson import dumps, loads, dump
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from yaml import safe_dump
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from time import time, sleep
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from logging import getLogger
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from logging.config import fileConfig
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from logging.handlers import MemoryHandler
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from os import remove
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from thingsboard_gateway.gateway.tb_client import TBClient
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from thingsboard_gateway.gateway.tb_logger import TBLoggerHandler
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log = getLogger("service")
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class RemoteConfigurator:
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def __init__(self, gateway, config):
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self.__gateway = gateway
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self.__new_configuration = None
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self.__old_configuration = None
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self.__apply_timeout = 10
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self.__old_tb_client = None
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self.__old_logs_configuration = self.__get_current_logs_configuration()
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self.__new_logs_configuration = None
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self.__old_connectors_configs = {}
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self.__new_connectors_configs = {}
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self.__old_general_configuration_file = config
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self.__new_general_configuration_file = {}
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self.__old_event_storage = None
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self.__new_event_storage = None
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self.in_process = False
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def process_configuration(self, configuration):
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try:
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if not self.in_process:
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self.in_process = True
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decoded_configuration = b64decode(configuration)
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self.__new_configuration = loads(decoded_configuration)
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self.__old_connectors_configs = self.__gateway._connectors_configs
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self.__new_general_configuration_file = self.__new_configuration.get("thingsboard")
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self.__new_logs_configuration = b64decode(self.__new_general_configuration_file.pop("logs")).decode('UTF-8').replace('}}', '\n')
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if self.__old_logs_configuration == self.__new_logs_configuration:
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log.debug("Received logs configuration is the same.")
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else:
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log.debug("Received logs configuration is not the same. Updating loggers...")
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self.__update_logs_configuration()
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if self.__old_configuration != decoded_configuration:
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log.info("Remote configuration received: \n %s", decoded_configuration)
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self.__process_connectors_configuration()
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self.__old_configuration = self.__new_configuration
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# self.send_current_configuration()
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self.in_process = False
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else:
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log.error("Remote configuration is already in processing")
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except Exception as e:
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self.in_process = False
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log.exception(e)
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def send_current_configuration(self):
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current_configuration = {}
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for connector in self.__gateway._connectors_configs:
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log.debug(connector)
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if current_configuration.get(connector) is None:
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current_configuration[connector] = []
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for config_file in self.__gateway._connectors_configs[connector]:
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current_configuration[connector].append(config_file)
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current_configuration["thingsboard"] = self.__old_general_configuration_file
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current_configuration["thingsboard"]["logs"] = b64encode(self.__old_logs_configuration.replace('\n', '}}').encode("UTF-8"))
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encoded_current_configuration = b64encode(dumps(current_configuration).encode())
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self.__old_configuration = encoded_current_configuration
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self.__gateway.tb_client.client.send_attributes(
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{"current_configuration": encoded_current_configuration.decode("UTF-8")}).get()
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def __process_connectors_configuration(self):
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log.debug("Processing remote connectors configuration...")
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self.__apply_storage_configuration()
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if self.__apply_new_connectors_configuration():
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self.__write_new_configuration_files()
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if self.__safe_apply_connection_configuration():
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log.info("Remote configuration has been applied.")
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with open(self.__gateway._config_dir + "tb_gateway.yaml", "w") as general_configuration_file:
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safe_dump(self.__new_general_configuration_file, general_configuration_file)
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self.__old_connectors_configs = {}
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self.__new_connectors_configs = {}
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self.__old_general_configuration_file = self.__new_general_configuration_file
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self.__old_logs_configuration = self.__new_logs_configuration
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self.__new_logs_configuration = None
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self.__new_general_configuration_file = {}
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else:
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log.error("A remote general configuration applying has been failed.")
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self.__old_connectors_configs = {}
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self.__new_connectors_configs = {}
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self.__new_logs_configuration = None
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self.__new_general_configuration_file = {}
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return
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def __prepare_connectors_configuration(self, input_connector_config):
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try:
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self.__gateway._connectors_configs = {}
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for connector in input_connector_config['thingsboard']['connectors']:
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for input_connector in input_connector_config[connector['type']]:
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if input_connector['name'] == connector['name']:
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if not self.__gateway._connectors_configs.get(connector['type']):
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self.__gateway._connectors_configs[connector['type']] = []
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self.__gateway._connectors_configs[connector['type']].append(
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{"name": connector["name"], "config": {connector['configuration']: input_connector["config"]}})
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except Exception as e:
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log.exception(e)
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def __apply_new_connectors_configuration(self):
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try:
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self.__prepare_connectors_configuration(self.__new_configuration)
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for connector_name in self.__gateway.available_connectors:
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try:
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self.__gateway.available_connectors[connector_name].close()
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except Exception as e:
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log.exception(e)
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self.__gateway._connect_with_connectors()
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log.debug("New connectors configuration has been applied")
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self.__old_connectors_configs = {}
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return True
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except Exception as e:
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self.__gateway._connectors_configs = self.__old_connectors_configs
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for connector_name in self.__gateway.available_connectors:
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self.__gateway.available_connectors[connector_name].close()
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self.__gateway._connect_with_connectors()
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log.exception(e)
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return False
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def __write_new_configuration_files(self):
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try:
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self.__new_connectors_configs = self.__new_connectors_configs if self.__new_connectors_configs else self.__gateway._connectors_configs
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new_connectors_files = []
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for connector_type in self.__new_connectors_configs:
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for connector_config_section in self.__new_connectors_configs[connector_type]:
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for connector_file in connector_config_section["config"]:
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connector_config = connector_config_section["config"][connector_file]
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for conn in self.__new_general_configuration_file["connectors"]:
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with open(self.__gateway._config_dir + conn.get("configuration"), "w") as config_file:
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dump(connector_config, config_file, sort_keys=True, indent=2)
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new_connectors_files.append(connector_file)
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log.debug("Saving new configuration for \"%s\" connector to file \"%s\"", connector_type,
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connector_file)
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for old_connector_type in self.__old_connectors_configs:
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for old_connector_config_section in self.__old_connectors_configs[old_connector_type]:
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for old_connector_file in old_connector_config_section["config"]:
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if old_connector_file not in new_connectors_files:
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remove(self.__gateway._config_dir + old_connector_file)
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log.debug("Remove old configuration file \"%s\" for \"%s\" connector ", old_connector_file,
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old_connector_type)
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except Exception as e:
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log.exception(e)
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def __safe_apply_connection_configuration(self):
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apply_start = time() * 1000
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self.__old_tb_client = self.__gateway.tb_client
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try:
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self.__old_tb_client.pause()
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except Exception as e:
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log.exception(e)
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self.__revert_configuration()
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return False
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try:
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tb_client = TBClient(self.__new_general_configuration_file["thingsboard"])
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tb_client.connect()
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except Exception as e:
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log.exception(e)
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self.__revert_configuration()
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return False
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self.__gateway.tb_client = tb_client
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try:
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connection_state = False
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while time() * 1000 - apply_start < self.__apply_timeout * 1000 and not connection_state:
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connection_state = self.__gateway.tb_client.is_connected()
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sleep(.1)
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if not connection_state:
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self.__revert_configuration()
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log.info("The gateway cannot connect to the ThingsBoard server with a new configuration.")
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return False
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else:
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self.__old_tb_client.unsubscribe("*")
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self.__old_tb_client.stop()
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self.__gateway.tb_client.client.gw_set_server_side_rpc_request_handler(
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self.__gateway._rpc_request_handler)
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self.__gateway.tb_client.client.set_server_side_rpc_request_handler(self.__gateway._rpc_request_handler)
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self.__gateway.tb_client.client.subscribe_to_all_attributes(self.__gateway._attribute_update_callback)
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self.__gateway.tb_client.client.gw_subscribe_to_all_attributes(
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self.__gateway._attribute_update_callback)
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return True
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except Exception as e:
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log.exception(e)
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self.__revert_configuration()
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return False
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def __apply_storage_configuration(self):
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if self.__old_general_configuration_file["storage"] != self.__new_general_configuration_file["storage"]:
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self.__old_event_storage = self.__gateway._event_storage
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try:
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self.__gateway._event_storage = self.__gateway._event_storage_types[
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self.__new_general_configuration_file["storage"]["type"]](
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self.__new_general_configuration_file["storage"])
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self.__old_event_storage = None
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except Exception as e:
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log.exception(e)
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self.__gateway._event_storage = self.__old_event_storage
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def __revert_configuration(self):
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log.info("Remote general configuration will be restored.")
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self.__new_general_configuration_file = self.__old_general_configuration_file
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self.__gateway.tb_client.disconnect()
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self.__gateway.tb_client.stop()
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self.__gateway.tb_client = self.__old_tb_client
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self.__gateway.tb_client.connect()
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self.__gateway.tb_client.unpause()
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def __get_current_logs_configuration(self):
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try:
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with open(self.__gateway._config_dir + 'logs.conf', 'r') as logs:
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current_logs_configuration = logs.read()
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return current_logs_configuration
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except Exception as e:
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log.exception(e)
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def __update_logs_configuration(self):
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try:
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logs_conf_file_path = self.__gateway._config_dir + 'logs.conf'
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with open(logs_conf_file_path, 'w') as logs:
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logs.write(self.__new_logs_configuration+"\r\n")
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fileConfig(logs_conf_file_path)
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self.__gateway.main_handler = MemoryHandler(-1)
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self.__gateway.remote_handler = TBLoggerHandler(self.__gateway)
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self.__gateway.main_handler.setTarget(self.__gateway.remote_handler)
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log.debug("Logs configuration has been updated.")
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except Exception as e:
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log.exception(e)
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