[Metric] new cython interface for python worker metric (#9469)

src/ray/stats/metric.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "ray/stats/metric.h"
+
 #include "opencensus/stats/internal/aggregation_window.h"
 #include "opencensus/stats/internal/set_aggregation_window.h"
 
@@ -85,6 +86,16 @@ void Metric::Record(double value, const TagsType &tags) {
   opencensus::stats::Record({{*measure_, value}}, combined_tags);
 }
 
+void Metric::Record(double value, std::unordered_map<std::string, std::string> &tags) {
+  TagsType tags_pair_vec;
+  std::for_each(
+      tags.begin(), tags.end(),
+      [&tags_pair_vec](std::pair<std::string, std::string> tag) {
+        return tags_pair_vec.push_back({TagKeyType::Register(tag.first), tag.second});
+      });
+  Record(value, tags_pair_vec);
+}
+
 void Gauge::RegisterView() {
   opencensus::stats::ViewDescriptor view_descriptor =
       opencensus::stats::ViewDescriptor()

src/ray/stats/metric.h

@@ -92,7 +92,7 @@ class Metric {
   std::string GetName() const { return name_; }
 
   /// Record the value for this metric.
-  void Record(double value) { Record(value, {}); }
+  void Record(double value) { Record(value, TagsType{}); }
 
   /// Record the value for this metric.
   ///
@@ -100,6 +100,12 @@ class Metric {
   /// \param tags The tag values that we want to record for this metric record.
   void Record(double value, const TagsType &tags);
 
+  /// Record the value for this metric.
+  ///
+  /// \param value The value that we record.
+  /// \param tags The map tag values that we want to record for this metric record.
+  void Record(double value, std::unordered_map<std::string, std::string> &tags);
+
  protected:
   virtual void RegisterView() = 0;