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