mirror of
https://github.com/aykhans/AzSuicideDataVisualization.git
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75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
# Copyright 2018-2022 Streamlit Inc.
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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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import os
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import threading
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import uuid
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from typing import Optional
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from streamlit import util
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_ETC_MACHINE_ID_PATH = "/etc/machine-id"
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_DBUS_MACHINE_ID_PATH = "/var/lib/dbus/machine-id"
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def _get_machine_id_v3() -> str:
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"""Get the machine ID
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This is a unique identifier for a user for tracking metrics in Segment,
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that is broken in different ways in some Linux distros and Docker images.
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- at times just a hash of '', which means many machines map to the same ID
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- at times a hash of the same string, when running in a Docker container
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"""
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machine_id = str(uuid.getnode())
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if os.path.isfile(_ETC_MACHINE_ID_PATH):
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with open(_ETC_MACHINE_ID_PATH, "r") as f:
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machine_id = f.read()
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elif os.path.isfile(_DBUS_MACHINE_ID_PATH):
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with open(_DBUS_MACHINE_ID_PATH, "r") as f:
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machine_id = f.read()
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return machine_id
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class Installation:
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_instance_lock = threading.Lock()
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_instance = None # type: Optional[Installation]
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@classmethod
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def instance(cls) -> "Installation":
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"""Returns the singleton Installation"""
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# We use a double-checked locking optimization to avoid the overhead
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# of acquiring the lock in the common case:
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# https://en.wikipedia.org/wiki/Double-checked_locking
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if cls._instance is None:
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with cls._instance_lock:
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if cls._instance is None:
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cls._instance = Installation()
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return cls._instance
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def __init__(self):
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self.installation_id_v3 = str(
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uuid.uuid5(uuid.NAMESPACE_DNS, _get_machine_id_v3())
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)
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def __repr__(self) -> str:
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return util.repr_(self)
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@property
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def installation_id(self):
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return self.installation_id_v3
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