WIP: The tracing service prototype

services/resource_coordinator/tracing/recorder_impl.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SERVICES_RESOURCE_COORDINATOR_TRACING_RECORDER_IMPL_H_
+#define SERVICES_RESOURCE_COORDINATOR_TRACING_RECORDER_IMPL_H_
+
+#include "base/sequenced_task_runner.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/resource_coordinator/public/interfaces/tracing/tracing.mojom.h"
+
+namespace resource_coordinator {
+namespace tracing {
+
+class RecorderImpl : public mojom::Recorder {
+ public:
+  RecorderImpl(
+      mojom::RecorderRequest request,
+      bool is_array,
+      const base::Closure& recorder_change_callback,
+      const scoped_refptr<base::SequencedTaskRunner>& background_task_runner);
+  ~RecorderImpl() override;
+
+  std::string& data() { return data_; }
+  void clear_data() { data_.clear(); }
+  std::set<std::string> category_set() const { return category_set_; }
+  bool is_recording() const { return is_recording_; }
+  bool is_array() const { return is_array_; }
+
+ private:
+  // mojom::Recorder
+  void AddCategories(const std::string& categories) override;
+  void AddChunk(const std::string& chunk) override;
+  void AddMetadata(std::unique_ptr<base::DictionaryValue> metadata) override;
+
+  void OnConnectionError();
+
+  std::string data_;
+  bool is_recording_;
+  bool is_array_;
+  base::Closure recorder_change_callback_;
+  scoped_refptr<base::SequencedTaskRunner> background_task_runner_;
+  mojo::Binding<mojom::Recorder> binding_;
+  std::set<std::string> category_set_;
+
+  DISALLOW_COPY_AND_ASSIGN(RecorderImpl);
+};
+
+}  // namespace tracing
+}  // namespace resource_coordinator
+#endif  // SERVICES_RESOURCE_COORDINATOR_TRACING_RECORDER_IMPL_H_