1 files changed, 86 insertions, 0 deletions
diff --git a/src/common/tracer.cc b/src/common/tracer.cc
new file mode 100644
index 000000000..d3a1afffa
--- /dev/null
+++ b/src/common/tracer.cc
@@ -0,0 +1,86 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "tracer.h"
+#include <arpa/inet.h>
+#include <yaml-cpp/yaml.h>
+#ifdef __linux__
+#include <linux/types.h>
+#else
+typedef int64_t __s64;
+#endif
+
+#include "common/debug.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_osd
+#undef dout_prefix
+#define dout_prefix *_dout << "jaeger_tracing "
+
+namespace jaeger_tracing {
+
+  std::shared_ptr<opentracing::v3::Tracer> tracer = nullptr;
+
+  void init_tracer(const char* tracer_name) {
+    if (!tracer) {
+	YAML::Node yaml;
+	try{
+	  yaml = YAML::LoadFile("../src/jaegertracing/config.yml");
+	dout(3) << "yaml loaded" << yaml << dendl;
+	}
+	catch(std::exception &e) {
+	  dout(3) << "failed to load yaml file using default config" << dendl;
+	  auto yaml_config = R"cfg(
+disabled: false
+reporter:
+    logSpans: false
+    queueSize: 100
+    bufferFlushInterval: 10
+sampler:
+    type: const
+    param: 1
+headers:
+    jaegerDebugHeader: debug-id
+    jaegerBaggageHeader: baggage
+    TraceContextHeaderName: trace-id
+baggage_restrictions:
+    denyBaggageOnInitializationFailure: false
+    refreshInterval: 60
+)cfg";
+	yaml = YAML::Load(yaml_config);
+	dout(3) << "yaml loaded" << yaml << dendl;
+      }
+      static auto configuration = jaegertracing::Config::parse(yaml);
+      tracer = jaegertracing::Tracer::make( tracer_name, configuration,
+	    jaegertracing::logging::consoleLogger());
+      dout(3) << "tracer_jaeger init successful" << dendl;
+    }
+    //incase of stale tracer, configure with a new global tracer
+    if (opentracing::Tracer::Global() != tracer) {
+      opentracing::Tracer::InitGlobal(
+	  std::static_pointer_cast<opentracing::Tracer>(tracer));
+    }
+  }
+
+  jspan new_span(const char* span_name) {
+    return opentracing::Tracer::Global()->StartSpan(span_name);
+ }
+
+  jspan child_span(const char* span_name, const jspan& parent_span) {
+    //no parent check if parent not found span will still be constructed
+    return opentracing::Tracer::Global()->StartSpan(span_name,
+	{opentracing::ChildOf(&parent_span->context())});
+ }
+
+  void finish_span(const jspan& span) {
+    if (span) {
+      span->Finish();
+    }
+  }
+
+  void set_span_tag(const jspan& span, const char* key, const char* value) {
+    if (span) {
+      span->SetTag(key, value);
+    }
+  }
+}