66 lines
1.7 KiB
Python
66 lines
1.7 KiB
Python
# Copyright The OpenTelemetry Authors
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# SPDX-License-Identifier: Apache-2.0
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from __future__ import annotations
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from abc import ABC, abstractmethod
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from contextvars import Token
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class Context(dict[str, object]):
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def __setitem__(self, key: str, value: object) -> None:
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raise ValueError
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def __delitem__(self, key: str) -> None:
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raise ValueError
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def setdefault(self, key: str, default: object = None) -> object:
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raise ValueError
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def pop(self, key: str, *args: object) -> object:
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raise ValueError
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def popitem(self) -> tuple[str, object]:
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raise ValueError
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def clear(self) -> None:
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raise ValueError
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def update(self, *args: object, **kwargs: object) -> None:
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raise ValueError
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def __ior__(self, other: object) -> Context:
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raise ValueError
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class _RuntimeContext(ABC):
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"""The RuntimeContext interface provides a wrapper for the different
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mechanisms that are used to propagate context in Python.
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Implementations can be made available via entry_points and
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selected through environment variables.
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"""
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@abstractmethod
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def attach(self, context: Context) -> Token[Context]:
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"""Sets the current `Context` object. Returns a
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token that can be used to reset to the previous `Context`.
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Args:
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context: The Context to set.
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"""
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@abstractmethod
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def get_current(self) -> Context:
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"""Returns the current `Context` object."""
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@abstractmethod
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def detach(self, token: Token[Context]) -> None:
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"""Resets Context to a previous value
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Args:
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token: A reference to a previous Context.
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"""
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__all__ = ["Context"]
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