mirror of
https://github.com/thingsboard/thingsboard-gateway
synced 2025-10-26 22:31:42 +08:00
91 lines
3.6 KiB
Python
91 lines
3.6 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 thingsboard_gateway.storage.event_storage import EventStorage, log
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from thingsboard_gateway.storage.event_storage_files import EventStorageFiles
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from thingsboard_gateway.storage.event_storage_writer import EventStorageWriter
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from thingsboard_gateway.storage.event_storage_reader import EventStorageReader
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from thingsboard_gateway.storage.file_event_storage_settings import FileEventStorageSettings
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from random import choice
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from string import ascii_lowercase
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import os
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import time
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import json
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class FileEventStorage(EventStorage):
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def __init__(self, config):
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self.settings = FileEventStorageSettings(config)
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self.init_data_folder_if_not_exist()
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self.event_storage_files = self.init_data_files()
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self.data_files = self.event_storage_files.get_data_files()
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self.state_file = self.event_storage_files.get_state_file()
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self.__writer = EventStorageWriter(self.event_storage_files, self.settings)
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self.__reader = EventStorageReader(self.event_storage_files, self.settings)
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def put(self, event):
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try:
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self.__writer.write(event)
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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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return False
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def get_event_pack(self):
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return self.__reader.read()
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def event_pack_processing_done(self):
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self.__reader.discard_batch()
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def init_data_folder_if_not_exist(self):
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path = self.settings.get_data_folder_path()
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if not os.path.exists(path):
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try:
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os.makedirs(path)
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except OSError as e:
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log.error('Failed to create data folder!', e)
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def init_data_files(self):
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data_files = []
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state_file = None
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data_files_size = 0
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_dir = self.settings.get_data_folder_path()
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if os.path.isdir(_dir):
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for file in os.listdir(_dir):
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if file.startswith('data_'):
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data_files.append(file)
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data_files_size += os.path.getsize(_dir + file)
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elif file.startswith('state_'):
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state_file = file
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if data_files_size == 0:
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data_files.append(self.create_new_datafile())
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if not state_file:
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state_file = self.create_file('state_', 'file')
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with open(self.settings.get_data_folder_path() + state_file, 'w') as f:
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json.dump({"position": 0, "file": sorted(data_files)[0]}, f)
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return EventStorageFiles(state_file, data_files)
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def create_new_datafile(self):
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return self.create_file('data_', str(round(time.time() * 1000)))
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def create_file(self, prefix, filename):
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file_path = self.settings.get_data_folder_path() + prefix + filename + '.txt'
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try:
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file = open(file_path, 'w')
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file.close()
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return prefix + filename + '.txt'
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except IOError as e:
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log.error("Failed to create a new file!", e)
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pass
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