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Code Issues Releases Activity

Add temporality selector functions (#7434)

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From: https://github.com/open-telemetry/opentelemetry-go/pull/7346

This PR exposes the default TemporalitySelector funcs that are used by
the OTel env var processing.

The reason to expose these funcs is because there is some discrepancy in
various vendor documentation on how to enable these settings using go
option args WithTemporalitySelector

https://cloud-native.slack.com/archives/C01NPAXACKT/p1757443233624599

---------

Co-authored-by: Damien Mathieu <42@dmathieu.com>
Co-authored-by: David Ashpole <dashpole@google.com>
This commit is contained in:
Dave Protasowski
2025-10-02 10:13:59 -04:00
committed by GitHub
parent ffeeee82a8
commit dee11e6ae3
6 changed files with 99 additions and 79 deletions
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internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
+3 -26
View File
@@ -18,7 +18,6 @@ import (
"{{ .envconfigImportPath }}"
"go.opentelemetry.io/otel/internal/global"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/metric/metricdata"
)
// DefaultEnvOptionsReader is the default environments reader.
@@ -165,11 +164,11 @@ func withEnvTemporalityPreference(n string, fn func(metric.TemporalitySelector))
if s, ok := e.GetEnvValue(n); ok {
switch strings.ToLower(s) {
case "cumulative":
fn(cumulativeTemporality)
fn(metric.CumulativeTemporalitySelector)
case "delta":
fn(deltaTemporality)
fn(metric.DeltaTemporalitySelector)
case "lowmemory":
fn(lowMemory)
fn(metric.LowMemoryTemporalitySelector)
default:
global.Warn(
"OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE is set to an invalid value, ignoring.",
@@ -181,28 +180,6 @@ func withEnvTemporalityPreference(n string, fn func(metric.TemporalitySelector))
}
}
func cumulativeTemporality(metric.InstrumentKind) metricdata.Temporality {
return metricdata.CumulativeTemporality
}
func deltaTemporality(ik metric.InstrumentKind) metricdata.Temporality {
switch ik {
case metric.InstrumentKindCounter, metric.InstrumentKindHistogram, metric.InstrumentKindObservableCounter:
return metricdata.DeltaTemporality
default:
return metricdata.CumulativeTemporality
}
}
func lowMemory(ik metric.InstrumentKind) metricdata.Temporality {
switch ik {
case metric.InstrumentKindCounter, metric.InstrumentKindHistogram:
return metricdata.DeltaTemporality
default:
return metricdata.CumulativeTemporality
}
}
func withEnvAggPreference(n string, fn func(metric.AggregationSelector)) func(e *envconfig.EnvOptionsReader) {
return func(e *envconfig.EnvOptionsReader) {
if s, ok := e.GetEnvValue(n); ok {