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Add null guards 2 - #8864
Add null guards 2#8864
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- io.opentelemetry.api.common.Attributes - io.opentelemetry.api.common.AttributesBuilder - io.opentelemetry.api.common.Value - io.opentelemetry.api.logs.DefaultLoggerProvider - io.opentelemetry.api.logs.LogRecordBuilder - io.opentelemetry.api.logs.Logger - io.opentelemetry.api.logs.LoggerProvider - io.opentelemetry.api.metrics.DefaultMeterProvider - io.opentelemetry.api.metrics.DoubleHistogramBuilder - io.opentelemetry.api.metrics.LongHistogramBuilder
Pull request dashboard statusMerged · refreshed 2026-10-07 16:27 UTC Status above doesn't look right?
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| AttributeKey<V> key3, | ||
| V value3) { | ||
| if (key1 == null) { | ||
| ApiUsageLogger.logNullParam(Attributes.class, "of", "key1"); |
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These illustrate an interesting point: in the first pass, they checked for null, logged a warning, and returned Attributes.empty().
But attributes.empty() is a breaking behavior change and not necessary because sortAndFilterToAttributes can tolerate / filter null entries.
So while we want to return a sensible noop-ish / empty / null value, we also want to retain existing behavior.
Codecov Report❌ Patch coverage is ❌ Your patch check has failed because the patch coverage (11.59%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage. Additional details and impacted files@@ Coverage Diff @@
## main #8864 +/- ##
============================================
- Coverage 91.32% 90.55% -0.78%
- Complexity 10673 10706 +33
============================================
Files 1007 1007
Lines 28760 29118 +358
Branches 3684 3753 +69
============================================
+ Hits 26266 26368 +102
- Misses 1687 1851 +164
- Partials 807 899 +92 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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| assertThatThrownBy(() -> Value.of((Map<String, Value<?>>) null)) | ||
| .isInstanceOf(NullPointerException.class) | ||
| .hasMessageContaining("value must not be null"); | ||
| assertThat(Value.of((String) null)).isEqualTo(Value.empty()); |
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any concern with this behavior change?
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Good call. Yes there is concern. The loosening from throwing to returning empty isn't problematic itself, but the solution implemented here isn't actually type safe.
Value.of((String) null) is supposed to return Value<String> but actually returns Value<Empty>. In order to be type safe, we would need a type-specific empty variant for each value type. I.e. "" for string, Map.of() for map, etc, which is a questionable design.
For now, I've reverted this to the existing NPE behavior, and adjusted the NullGuardTest to special case this from requiring a RUNTIME guard (i.e. graceful degradation) to a FAIL_FAST guard (i.e. requireNonNull).
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2 participants
Related to #8802.
See #8863 description for methodology.