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1 | // Copyright The OpenTelemetry Authors |
2 | // SPDX-License-Identifier: Apache-2.0 | |
3 | ||
4 | #include "opentelemetry/sdk/trace/samplers/parent.h" | |
5 | ||
6 | namespace trace_api = opentelemetry::trace; | |
7 | ||
8 | OPENTELEMETRY_BEGIN_NAMESPACE | |
9 | namespace sdk | |
10 | { | |
11 | namespace trace | |
12 | { | |
13 | ParentBasedSampler::ParentBasedSampler(std::shared_ptr<Sampler> delegate_sampler) noexcept | |
14 | : delegate_sampler_(delegate_sampler), | |
15 | description_("ParentBased{" + std::string{delegate_sampler->GetDescription()} + "}") | |
16 | {} | |
17 | ||
18 | SamplingResult ParentBasedSampler::ShouldSample( | |
19 | const trace_api::SpanContext &parent_context, | |
20 | trace_api::TraceId trace_id, | |
21 | nostd::string_view name, | |
22 | trace_api::SpanKind span_kind, | |
23 | const opentelemetry::common::KeyValueIterable &attributes, | |
24 | const trace_api::SpanContextKeyValueIterable &links) noexcept | |
25 | { | |
26 | if (!parent_context.IsValid()) | |
27 | { | |
28 | // If no parent (root span) exists returns the result of the delegateSampler | |
29 | return delegate_sampler_->ShouldSample(parent_context, trace_id, name, span_kind, attributes, | |
30 | links); | |
31 | } | |
32 | ||
33 | // If parent exists: | |
34 | if (parent_context.IsSampled()) | |
35 | { | |
36 | return {Decision::RECORD_AND_SAMPLE, nullptr, parent_context.trace_state()}; | |
37 | } | |
38 | ||
39 | return {Decision::DROP, nullptr, parent_context.trace_state()}; | |
40 | } | |
41 | ||
42 | nostd::string_view ParentBasedSampler::GetDescription() const noexcept | |
43 | { | |
44 | return description_; | |
45 | } | |
46 | } // namespace trace | |
47 | } // namespace sdk | |
48 | OPENTELEMETRY_END_NAMESPACE |