1 files changed, 45 insertions, 0 deletions
diff --git a/src/jaegertracing/opentelemetry-cpp/sdk/include/opentelemetry/sdk/trace/samplers/parent.h b/src/jaegertracing/opentelemetry-cpp/sdk/include/opentelemetry/sdk/trace/samplers/parent.h
new file mode 100644
index 000000000..c76a6c2a5
--- /dev/null
+++ b/src/jaegertracing/opentelemetry-cpp/sdk/include/opentelemetry/sdk/trace/samplers/parent.h
@@ -0,0 +1,45 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/common/atomic_shared_ptr.h"
+#include "opentelemetry/sdk/trace/sampler.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace trace
+{
+/**
+ * The ParentBased sampler is a composite sampler. ParentBased(delegateSampler) either respects
+ * the parent span's sampling decision or delegates to delegateSampler for root spans.
+ */
+class ParentBasedSampler : public Sampler
+{
+public:
+  explicit ParentBasedSampler(std::shared_ptr<Sampler> delegate_sampler) noexcept;
+  /** The decision either respects the parent span's sampling decision or delegates to
+   * delegateSampler for root spans
+   * @return Returns DROP always
+   */
+  SamplingResult ShouldSample(
+      const opentelemetry::trace::SpanContext &parent_context,
+      opentelemetry::trace::TraceId trace_id,
+      nostd::string_view name,
+      opentelemetry::trace::SpanKind span_kind,
+      const opentelemetry::common::KeyValueIterable &attributes,
+      const opentelemetry::trace::SpanContextKeyValueIterable &links) noexcept override;
+
+  /**
+   * @return Description MUST be ParentBased{delegate_sampler_.getDescription()}
+   */
+  nostd::string_view GetDescription() const noexcept override;
+
+private:
+  const std::shared_ptr<Sampler> delegate_sampler_;
+  const std::string description_;
+};
+}  // namespace trace
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE