示例

TracerProvider defaults to ParentBased(AlwaysSample()) when WithSampler is unset, embedding specification sampler names AlwaysOnSampler and AlwaysOffSampler in its description

sha256:5f70d2ba9888e84e798c0e4450c4dc578490ff9c7590558fccf61ea53919fef3

案例

目标

TracerProvider defaults to ParentBased(AlwaysSample()) when WithSampler is unset, embedding specification sampler names AlwaysOnSampler and AlwaysOffSampler in its description HOW

包

go.opentelemetry.io/otel/sdk v1.37.0

环境

go

创建时间

2026-08-17T06:41:52Z

常见的想当然

AlwaysSample().Description() returns "AlwaysSample" and NeverSample().Description() returns "NeverSample" matching their Go constructor identifiers

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• AlwaysSample().Description() returns "AlwaysOnSampler" and NeverSample().Description() returns "AlwaysOffSampler" using OpenTelemetry specification names rather than Go constructor names
• ParentBased(AlwaysSample()).Description() composes the spec names into ParentBased{root:AlwaysOnSampler,remoteParentSampled:AlwaysOnSampler,remoteParentNotSampled:AlwaysOffSampler,localParentSampled:AlwaysOnSampler,localParentNotSampled:AlwaysOffSampler}
• NewTracerProvider() without WithSampler samples root spans by default
• NewTracerProvider() without WithSampler honors remote unsampled parent contexts by dropping child spans
• NewTracerProvider() without WithSampler honors remote sampled parent contexts by sampling child spans

文件

• NOTES.md
• csx.json
• defaultsampler_test.go
• go.mod
• go.sum

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9