Demonstrate that we lose spans on short runs

The RemoteReporter loses spans during short-lived executions (jaegertracing#52).

This is a test case not a fix.

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

CMakeLists.txt

@@ -371,3 +371,11 @@ install(
   NAMESPACE "${namespace}"
   DESTINATION "${config_install_dir}"
 )
+
+
+add_executable(shortlived "shortlived.cpp")
+target_link_libraries(shortlived ${LIBS} jaegertracing)
+# If building on top of the local dependencies support, in-tree, add
+# target_include_directories(shortlived PRIVATE
+#  $<BUILD_INTERFACE:${jaegertracing_SOURCE_DIR}/src>
+#  $<BUILD_INTERFACE:${jaegertracing_BINARY_DIR}/src>)

src/jaegertracing/shortlived.cpp

@@ -0,0 +1,46 @@
+#include <jaegertracing/Tracer.h>
+
+#include <chrono>
+#include <thread>
+
+using std::string;
+
+const string cfgstr {R"endyaml(
+disabled: false
+sampler:
+    type: const
+    param: 1
+reporter:
+    queueSize: 100
+    bufferFlushInterval: 10
+    logSpans: false
+    localAgentHostPort: 127.0.0.1:6831
+headers:
+    jaegerDebugHeader: debug-id
+    jaegerBaggageHeader: baggage
+    TraceContextHeaderName: trace-id
+    traceBaggageHeaderPrefix: "testctx-"
+baggage_restrictions:
+    denyBaggageOnInitializationFailure: false
+    hostPort: 127.0.0.1:5778
+    refreshInterval: 60
+)endyaml"};
+
+int main(int argc, char *argv[])
+{
+	const auto config = jaegertracing::Config::parse(YAML::Load(cfgstr));
+	auto tracer = jaegertracing::Tracer::make("shortlived", config);
+
+	string opname("shortlived");
+	if (argc > 1)
+	{
+		opname += "-";
+		opname += argv[1];
+	}
+	auto span = tracer->StartSpan(opname);
+	span->Finish();
+	span.reset();
+	/* This should ensure that all spans reach the server */
+	//static_cast<jaegertracing::Tracer*>(tracer.get())->flush();
+	tracer->Close();
+}