--- /dev/null
+#include <opentracing/mocktracer/json.h>
+#include <opentracing/mocktracer/json_recorder.h>
+
+namespace opentracing {
+BEGIN_OPENTRACING_ABI_NAMESPACE
+namespace mocktracer {
+JsonRecorder::JsonRecorder(std::unique_ptr<std::ostream>&& out)
+ : out_{std::move(out)} {}
+
+void JsonRecorder::RecordSpan(SpanData&& span_data) noexcept try {
+ std::lock_guard<std::mutex> lock_guard{mutex_};
+ spans_.emplace_back(std::move(span_data));
+} catch (const std::exception&) {
+ // Drop span.
+}
+
+void JsonRecorder::Close() noexcept try {
+ if (out_ == nullptr) {
+ return;
+ }
+ std::lock_guard<std::mutex> lock_guard{mutex_};
+ ToJson(*out_, spans_);
+ out_->flush();
+ spans_.clear();
+} catch (const std::exception&) {
+ // Ignore errors.
+}
+} // namespace mocktracer
+END_OPENTRACING_ABI_NAMESPACE
+} // namespace opentracing