Source code for opentelemetry.propagators.composite

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#     http://www.apache.org/licenses/LICENSE-2.0
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import logging
import typing

from deprecated import deprecated

from opentelemetry.context.context import Context
from opentelemetry.propagators import textmap

logger = logging.getLogger(__name__)


[docs]class CompositePropagator(textmap.TextMapPropagator): """CompositePropagator provides a mechanism for combining multiple propagators into a single one. Args: propagators: the list of propagators to use """ def __init__( self, propagators: typing.Sequence[textmap.TextMapPropagator] ) -> None: self._propagators = propagators
[docs] def extract( self, carrier: textmap.CarrierT, context: typing.Optional[Context] = None, getter: textmap.Getter[textmap.CarrierT] = textmap.default_getter, ) -> Context: """Run each of the configured propagators with the given context and carrier. Propagators are run in the order they are configured, if multiple propagators write the same context key, the propagator later in the list will override previous propagators. See `opentelemetry.propagators.textmap.TextMapPropagator.extract` """ for propagator in self._propagators: context = propagator.extract(carrier, context, getter=getter) return context # type: ignore
[docs] def inject( self, carrier: textmap.CarrierT, context: typing.Optional[Context] = None, setter: textmap.Setter[textmap.CarrierT] = textmap.default_setter, ) -> None: """Run each of the configured propagators with the given context and carrier. Propagators are run in the order they are configured, if multiple propagators write the same carrier key, the propagator later in the list will override previous propagators. See `opentelemetry.propagators.textmap.TextMapPropagator.inject` """ for propagator in self._propagators: propagator.inject(carrier, context, setter=setter)
@property def fields(self) -> typing.Set[str]: """Returns a set with the fields set in `inject`. See `opentelemetry.propagators.textmap.TextMapPropagator.fields` """ composite_fields = set() for propagator in self._propagators: for field in propagator.fields: composite_fields.add(field) return composite_fields
[docs]@deprecated(version="1.2.0", reason="You should use CompositePropagator") # type: ignore class CompositeHTTPPropagator(CompositePropagator): """CompositeHTTPPropagator provides a mechanism for combining multiple propagators into a single one. """