Rename asset_stream_manager to cdc_stream (#27)

Fixes #13

cdc_stream/metrics_recorder.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef CDC_STREAM_METRICS_RECORDER_H_
+#define CDC_STREAM_METRICS_RECORDER_H_
+
+#include "absl/status/status.h"
+#include "common/util.h"
+#include "metrics/enums.h"
+#include "metrics/messages.h"
+#include "metrics/metrics.h"
+
+namespace cdc_ft {
+
+class MetricsRecorder {
+ public:
+  virtual void RecordEvent(metrics::DeveloperLogEvent event,
+                           metrics::EventType code) const = 0;
+
+  virtual metrics::MetricsService* GetMetricsService() const;
+
+ protected:
+  explicit MetricsRecorder(metrics::MetricsService* const metrics_service);
+  metrics::MetricsService* const metrics_service_;
+};
+
+class MultiSessionMetricsRecorder : public MetricsRecorder {
+ public:
+  explicit MultiSessionMetricsRecorder(
+      metrics::MetricsService* const metrics_service);
+  ~MultiSessionMetricsRecorder();
+
+  virtual void RecordEvent(metrics::DeveloperLogEvent event,
+                           metrics::EventType code) const;
+
+  const std::string& MultiSessionId() const { return multisession_id_; }
+
+ private:
+  std::string multisession_id_;
+};
+
+class SessionMetricsRecorder : public MetricsRecorder {
+ public:
+  explicit SessionMetricsRecorder(
+      metrics::MetricsService* const metrics_service,
+      const std::string& multisession_id, const std::string& project_id,
+      const std::string& organization_id);
+  ~SessionMetricsRecorder();
+
+  virtual void RecordEvent(metrics::DeveloperLogEvent event,
+                           metrics::EventType code) const;
+
+  const std::string& SessionId() const { return session_id_; }
+
+ private:
+  std::string multisession_id_;
+  std::string session_id_;
+  std::string project_id_;
+  std::string organization_id_;
+};
+
+}  // namespace cdc_ft
+
+#endif  // CDC_STREAM_METRICS_RECORDER_H_