Make propagators conform to spec #488
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* do not modify / set an invalid span in the passed context in case a propagator did not manage to extract * in case no context is passed to propagator.extract assume the root context as default so that a new trace is started instead of continung the current active trace in case extraction fails * fix also ot-trace propagator which compared int with str trace/span ids when checking for validity in extract
mariojonke
requested review from
codeboten and
hectorhdzg
and removed request for
a team
srikanthccv
reviewed
May 6, 2021
ocelotl
reviewed
May 26, 2021
| @@ -42,6 +42,9 @@ def extract( | |||
| context: typing.Optional[Context] = None, | |||
| getter: Getter = default_getter, | |||
| ) -> Context: | |||
| if context is None: | |||
| context = Context() | |||
There was a problem hiding this comment.
In this PR description you mention this, @mariojonke:
Propagators should return the passed in context (or the current one if none was given) if nothing could be extracted.
Should we use the current context instead of instantiating a new one?
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We decided in the SIG meeting to use the root context as default because the current context would continue a possible active trace instead of starting a new one if extracting from the carrier fails (see also open-telemetry/opentelemetry-python#1765 (comment))
See also PR in the core repo: open-telemetry/opentelemetry-python#1811
ocelotl
approved these changes
May 26, 2021
srikanthccv
approved these changes
May 27, 2021
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Description
Propagators use the root context as default value for the extract operation. Additionally avoid modifying the context in case there is nothing to extract or the carrier does not hold valid data.
Fixes open-telemetry/opentelemetry-python#1765
Fixes also an issue in the
ot-tracepropagator where trace/span id validity was comparing str with int values.Type of change
How Has This Been Tested?
unit tests have been added/adapted
Does This PR Require a Core Repo Change?
Checklist: