components/ukm/ukm_rotation_scheduler.h

   1 // Copyright 2017 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_UKM_UKM_ROTATION_SCHEDULER_H_
   6 #define COMPONENTS_UKM_UKM_ROTATION_SCHEDULER_H_
   7
   8 #include "base/time/time.h"
   9 #include "components/metrics/metrics_rotation_scheduler.h"
  10
  11 namespace ukm {
  12
  13 // Scheduler to drive a UkmService object's log rotations.
  14 class UkmRotationScheduler : public metrics::MetricsRotationScheduler {
  15  public:
  16   // Creates UkmRotationScheduler object with the given |rotation_callback|
  17   // callback to call when log rotation should happen and |interval_callback|
  18   // to determine the interval between rotations in steady state.
  19   UkmRotationScheduler(
  20       const base::RepeatingClosure& rotation_callback,
  21       bool fast_startup_for_testing,
  22       const base::RepeatingCallback<base::TimeDelta(void)>& interval_callback);
  23
  24   UkmRotationScheduler(const UkmRotationScheduler&) = delete;
  25   UkmRotationScheduler& operator=(const UkmRotationScheduler&) = delete;
  26
  27   ~UkmRotationScheduler() override;
  28
  29  private:
  30   // Record the init sequence order histogram.
  31   void LogMetricsInitSequence(InitSequence sequence) override;
  32 };
  33
  34 }  // namespace ukm
  35
  36 #endif  // COMPONENTS_UKM_UKM_ROTATION_SCHEDULER_H_