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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include "acconfig.h"
#include "include/buffer.h"
#ifdef HAVE_JAEGER
#include "opentelemetry/trace/provider.h"
using jspan = opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span>;
using jspan_context = opentelemetry::trace::SpanContext;
using jspan_attribute = opentelemetry::common::AttributeValue;
namespace tracing {
class Tracer {
private:
const static opentelemetry::nostd::shared_ptr<opentelemetry::trace::Tracer> noop_tracer;
const static jspan noop_span;
opentelemetry::nostd::shared_ptr<opentelemetry::trace::Tracer> tracer;
public:
Tracer() = default;
Tracer(opentelemetry::nostd::string_view service_name);
void init(opentelemetry::nostd::string_view service_name);
bool is_enabled() const;
// creates and returns a new span with `trace_name`
// this span represents a trace, since it has no parent.
jspan start_trace(opentelemetry::nostd::string_view trace_name);
// creates and returns a new span with `trace_name`
// if false is given to `trace_is_enabled` param, noop span will be returned
jspan start_trace(opentelemetry::nostd::string_view trace_name, bool trace_is_enabled);
// creates and returns a new span with `span_name` which parent span is `parent_span'
jspan add_span(opentelemetry::nostd::string_view span_name, const jspan& parent_span);
// creates and return a new span with `span_name`
// the span is added to the trace which it's context is `parent_ctx`.
// parent_ctx contains the required information of the trace.
jspan add_span(opentelemetry::nostd::string_view span_name, const jspan_context& parent_ctx);
};
void encode(const jspan_context& span, ceph::buffer::list& bl, uint64_t f = 0);
void decode(jspan_context& span_ctx, ceph::buffer::list::const_iterator& bl);
} // namespace tracing
#else // !HAVE_JAEGER
#include <string_view>
class Value {
public:
template <typename T> Value(T val) {}
};
using jspan_attribute = Value;
struct jspan_context {
jspan_context() {}
jspan_context(bool sampled_flag, bool is_remote) {}
};
struct span_stub {
jspan_context _ctx;
template <typename T>
void SetAttribute(std::string_view key, const T& value) const noexcept {}
void AddEvent(std::string_view) {}
void AddEvent(std::string_view, std::initializer_list<std::pair<std::string_view, jspan_attribute>> fields) {}
template <typename T> void AddEvent(std::string_view name, const T& fields = {}) {}
const jspan_context& GetContext() { return _ctx; }
void UpdateName(std::string_view) {}
bool IsRecording() { return false; }
};
class jspan {
span_stub span;
public:
span_stub& operator*() { return span; }
const span_stub& operator*() const { return span; }
span_stub* operator->() { return &span; }
const span_stub* operator->() const { return &span; }
operator bool() const { return false; }
};
namespace tracing {
struct Tracer {
bool is_enabled() const { return false; }
jspan start_trace(std::string_view, bool enabled = true) { return {}; }
jspan add_span(std::string_view, const jspan&) { return {}; }
jspan add_span(std::string_view span_name, const jspan_context& parent_ctx) { return {}; }
void init(std::string_view service_name) {}
};
inline void encode(const jspan_context& span, bufferlist& bl, uint64_t f=0) {}
inline void decode(jspan_context& span_ctx, ceph::buffer::list::const_iterator& bl) {}
}
#endif // !HAVE_JAEGER
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