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-rw-r--r--src/noop.cpp103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/noop.cpp b/src/noop.cpp
new file mode 100644
index 0000000..9c41ddb
--- /dev/null
+++ b/src/noop.cpp
@@ -0,0 +1,103 @@
+#include <opentracing/noop.h>
+
+namespace opentracing {
+BEGIN_OPENTRACING_ABI_NAMESPACE
+namespace {
+class NoopSpanContext : public SpanContext {
+ public:
+ void ForeachBaggageItem(
+ std::function<bool(const std::string& key,
+ const std::string& value)> /*f*/) const override {}
+
+ std::unique_ptr<SpanContext> Clone() const noexcept override {
+ return std::unique_ptr<SpanContext>{new (std::nothrow) NoopSpanContext{}};
+ }
+};
+
+class NoopSpan : public Span {
+ public:
+ explicit NoopSpan(std::shared_ptr<const Tracer>&& tracer) noexcept
+ : tracer_(std::move(tracer)) {}
+
+ void FinishWithOptions(
+ const FinishSpanOptions& /*finish_span_options*/) noexcept override {}
+
+ void SetOperationName(string_view /*name*/) noexcept override {}
+
+ void SetTag(string_view /*key*/, const Value& /*value*/) noexcept override {}
+
+ void SetBaggageItem(string_view /*restricted_key*/,
+ string_view /*value*/) noexcept override {}
+
+ std::string BaggageItem(string_view /*restricted_key*/) const
+ noexcept override {
+ return {};
+ }
+
+ void Log(std::initializer_list<std::pair<string_view, Value>>
+ /*fields*/) noexcept override {}
+
+ void Log(SystemTime /*timestamp*/,
+ std::initializer_list<
+ std::pair<string_view, Value>> /*fields*/) noexcept override {}
+
+ void Log(SystemTime /*timestamp*/,
+ const std::vector<
+ std::pair<string_view, Value>>& /*fields*/) noexcept override {}
+
+ const SpanContext& context() const noexcept override { return span_context_; }
+
+ const Tracer& tracer() const noexcept override { return *tracer_; }
+
+ private:
+ std::shared_ptr<const Tracer> tracer_;
+ NoopSpanContext span_context_;
+};
+
+class NoopTracer : public Tracer,
+ public std::enable_shared_from_this<NoopTracer> {
+ public:
+ std::unique_ptr<Span> StartSpanWithOptions(
+ string_view /*operation_name*/, const StartSpanOptions& /*options*/) const
+ noexcept override {
+ return std::unique_ptr<Span>(new (std::nothrow)
+ NoopSpan(shared_from_this()));
+ }
+
+ expected<void> Inject(const SpanContext& /*sc*/,
+ std::ostream& /*writer*/) const override {
+ return {};
+ }
+
+ expected<void> Inject(const SpanContext& /*sc*/,
+ const TextMapWriter& /*writer*/) const override {
+ return {};
+ }
+
+ expected<void> Inject(const SpanContext& /*sc*/,
+ const HTTPHeadersWriter& /*writer*/) const override {
+ return {};
+ }
+
+ expected<std::unique_ptr<SpanContext>> Extract(
+ std::istream& /*reader*/) const override {
+ return std::unique_ptr<SpanContext>(nullptr);
+ }
+
+ expected<std::unique_ptr<SpanContext>> Extract(
+ const TextMapReader& /*reader*/) const override {
+ return std::unique_ptr<SpanContext>(nullptr);
+ }
+
+ expected<std::unique_ptr<SpanContext>> Extract(
+ const HTTPHeadersReader& /*reader*/) const override {
+ return std::unique_ptr<SpanContext>(nullptr);
+ }
+};
+} // anonymous namespace
+
+std::shared_ptr<Tracer> MakeNoopTracer() noexcept {
+ return std::shared_ptr<Tracer>(new (std::nothrow) NoopTracer());
+}
+END_OPENTRACING_ABI_NAMESPACE
+} // namespace opentracing