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Handle none value for OTEL_PROPAGATORS #4236

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Handle none value for OTEL_PROPAGATORS #4236

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672a69f
Added none value for OTEL_PROPAGATORS
Annosha Oct 23, 2024
41b0350
Merge branch 'main' into otel-propagators-none-value
Annosha Oct 23, 2024
b07670f
removed redundant code
Annosha Oct 23, 2024
0e5f610
lint fixes
Annosha Oct 24, 2024
a78ffd7
fixing the for-loop
Annosha Oct 25, 2024
883f296
Merge branch 'main' into otel-propagators-none-value
Annosha Oct 25, 2024
5cbe62f
test: validate empty propagators for OTEL_PROPAGATORS="none"
Annosha Oct 25, 2024
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4 changes: 4 additions & 0 deletions opentelemetry-api/src/opentelemetry/propagate/__init__.py
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Expand Up @@ -129,6 +129,10 @@ def inject(
"tracecontext,baggage",
)

if environ_propagators.lower() == "none":
propagators = []
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else:
propagators = environ_propagators.split(",")

for propagator in environ_propagators.split(","):
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propagator = propagator.strip()
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12 changes: 12 additions & 0 deletions opentelemetry-api/tests/propagators/test_propagators.py
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Expand Up @@ -49,6 +49,18 @@ def test_propagators(propagators):

reload(opentelemetry.propagate)

@patch.dict(environ, {OTEL_PROPAGATORS: "none"})
@patch("opentelemetry.propagators.composite.CompositePropagator")
def test_no_propagators_loaded(self, mock_compositehttppropagator):
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@emdneto emdneto Oct 24, 2024 •
edited
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I ran this test locally, and it doesn't fail against the main branch

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@emdneto I apologize for the confusion. Could you clarify what you would like me to address?

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@xrmx xrmx Oct 25, 2024 •
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@Annosha The test should fail on main and raise and exception (as reported in the issue). If it doesn't fail with the current code it means it's not a good test to evaluate if the fix is working.

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@xrmx and @emdneto The test is failing after fixes in testing logic. This failure confirms that the test accurately detects the issue. Here is the test log on my machine:
test-fail-for-PR-OTEL-Propagators-NONE-vlaue
Could you please review this on your end and advise on any further improvements needed?

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I was expecting something like that: this should fail when running against main with the ValueError present on the issue

        global_textmap = propagate.get_global_textmap()
        self.assertIsInstance(global_textmap, composite.CompositePropagator)
        self.assertEqual(len(global_textmap._propagators), 0)

def test_propagators(propagators):
self.assertEqual(
propagators, []
) # Expecting an empty list of propagators

mock_compositehttppropagator.configure_mock(
**{"side_effect": test_propagators}
)

@patch.dict(environ, {OTEL_PROPAGATORS: "a, b, c "})
@patch("opentelemetry.propagators.composite.CompositePropagator")
@patch("opentelemetry.util._importlib_metadata.entry_points")
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