Record logs passed with Span::FinishWithOptions (#58)

Jaeger cpp-client was previously dropping logs included in a FinishSpanOptions
silently on the floor.

Fixes #57

Signed-off-by: Craig Ringer <[email protected]>

Author: ringerc

src/jaegertracing/LogRecord.h

@@ -25,6 +25,8 @@
 #include <type_traits>
 #include <vector>
 
+#include <opentracing/span.h>
+
 namespace jaegertracing {
 
 class LogRecord {
@@ -45,6 +47,12 @@ class LogRecord {
     {
     }
 
+    LogRecord(const opentracing::LogRecord & other)
+        : _timestamp(other.timestamp),
+          _fields(other.fields.begin(), other.fields.end())
+    {
+    }
+
     const Clock::time_point& timestamp() const { return _timestamp; }
 
     const std::vector<Tag>& fields() const { return _fields; }

src/jaegertracing/Span.cpp

@@ -97,6 +97,10 @@ void Span::FinishWithOptions(
         }
         _duration = finishTimeSteady - _startTimeSteady;
         tracer = _tracer;
+
+        std::copy(finishSpanOptions.log_records.begin(),
+                  finishSpanOptions.log_records.end(),
+                  std::back_inserter(_logs));
     }
 
     // Call `reportSpan` even for non-sampled traces.

src/jaegertracing/Tag.h

@@ -38,6 +38,13 @@ class Tag {
     {
     }
 
+    template <typename ValueArg>
+    Tag(const std::pair<std::string,ValueArg> & tag_pair)
+        : _key(tag_pair.first)
+        , _value(tag_pair.second)
+    {
+    }
+
     bool operator==(const Tag& rhs) const
     {
         return _key == rhs._key && _value == rhs._value;

src/jaegertracing/TracerTest.cpp

@@ -179,7 +179,12 @@ TEST(Tracer, testTracer)
     ASSERT_EQ("test-baggage-item-value",
               span->BaggageItem("test-baggage-item-key"));
     span->Log({ { "log-bool", true } });
-    span->Finish();
+    opentracing::FinishSpanOptions foptions;
+    opentracing::LogRecord lr{};
+    lr.fields = { {"options-log", "yep"} };
+    foptions.log_records.push_back(std::move(lr));
+    lr.timestamp = opentracing::SystemClock::now();
+    span->FinishWithOptions(foptions);
     ASSERT_GE(Span::SteadyClock::now(),
               span->startTimeSteady() + span->duration());
     span->SetOperationName("test-set-operation-after-finish");