45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
# Copyright The OpenTelemetry Authors
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# SPDX-License-Identifier: Apache-2.0
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from logging import getLogger
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from os import environ
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from typing import TYPE_CHECKING, TypeVar, cast
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if TYPE_CHECKING:
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from opentelemetry.metrics import MeterProvider
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from opentelemetry.trace import TracerProvider
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Provider = TypeVar("Provider", "TracerProvider", "MeterProvider")
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logger = getLogger(__name__)
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def _load_provider(
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provider_environment_variable: str, provider: str
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) -> Provider: # type: ignore[type-var]
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# pylint: disable=import-outside-toplevel,no-name-in-module
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from opentelemetry.util._importlib_metadata import ( # noqa: PLC0415
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entry_points,
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)
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try:
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provider_name = cast(
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str,
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environ.get(provider_environment_variable, f"default_{provider}"),
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)
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return cast(
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Provider,
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next( # type: ignore
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iter( # type: ignore
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entry_points( # type: ignore
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group=f"opentelemetry_{provider}",
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name=provider_name,
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)
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)
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).load()(),
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)
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except Exception: # pylint: disable=broad-exception-caught
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logger.exception("Failed to load configured provider %s", provider)
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raise
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