压缩历史至 95081aff

internal/otel_trace/sampler.go

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+/*
+Copyright 2025 linux.do
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package otel_trace
+
+import (
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+)
+
+// ParentBasedErrorAwareSampler 创建父级感知的概率采样器
+// - 如果父 Span 已采样，则子 Span 也采样
+// - 如果父 Span 未采样，则子 Span 也不采样
+// - 如果是根 Span，按 samplingRate 概率采样
+func ParentBasedErrorAwareSampler(samplingRate float64) sdktrace.Sampler {
+	return sdktrace.ParentBased(
+		sdktrace.TraceIDRatioBased(samplingRate),
+	)
+}