def tracer_provider() -> TracerProvider:
"""Gets the current global :class:`~.TracerProvider` object.
If there isn't one set yet, a default will be loaded.
"""
global _TRACER_PROVIDER, _TRACER_PROVIDER_FACTORY # pylint:disable=global-statement
if _TRACER_PROVIDER is None:
# pylint:disable=protected-access
try:
_TRACER_PROVIDER = loader._load_impl(
TracerProvider,
_TRACER_PROVIDER_FACTORY # type: ignore
)
except TypeError:
# if we raised an exception trying to instantiate an
# abstract class, default to no-op tracer impl
logger.warning(
"Unable to instantiate TracerProvider from factory.",
exc_info=True,
)
_TRACER_PROVIDER = DefaultTracerProvider()
del _TRACER_PROVIDER_FACTORY
return _TRACER_PROVIDER
def meter() -> Meter:
"""Gets the current global :class:`~.Meter` object.
If there isn't one set yet, a default will be loaded.
"""
global _METER, _METER_FACTORY # pylint:disable=global-statement
if _METER is None:
# pylint:disable=protected-access
_METER = loader._load_impl(Meter, _METER_FACTORY)
del _METER_FACTORY
return _METER
def tracer_source() -> TracerSource:
"""Gets the current global :class:`~.TracerSource` object.
If there isn't one set yet, a default will be loaded.
"""
global _TRACER_SOURCE, _TRACER_SOURCE_FACTORY # pylint:disable=global-statement
if _TRACER_SOURCE is None:
# pylint:disable=protected-access
_TRACER_SOURCE = loader._load_impl(TracerSource,
_TRACER_SOURCE_FACTORY)
del _TRACER_SOURCE_FACTORY
return _TRACER_SOURCE