components/metrics/metrics_rotation_scheduler.cc

   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 #include "components/metrics/metrics_rotation_scheduler.h"
   6
   7 #include "base/metrics/histogram_macros.h"
   8 #include "build/build_config.h"
   9
  10 namespace metrics {
  11
  12 MetricsRotationScheduler::MetricsRotationScheduler(
  13     const base::RepeatingClosure& upload_callback,
  14     const base::RepeatingCallback<base::TimeDelta(void)>&
  15         upload_interval_callback,
  16     bool fast_startup_for_testing)
  17     : MetricsScheduler(upload_callback, fast_startup_for_testing),
  18       init_task_complete_(false),
  19       waiting_for_init_task_complete_(false),
  20       upload_interval_callback_(upload_interval_callback) {}
  21
  22 MetricsRotationScheduler::~MetricsRotationScheduler() {}
  23
  24 void MetricsRotationScheduler::InitTaskComplete() {
  25   DCHECK(!init_task_complete_);
  26   init_task_complete_ = true;
  27   if (waiting_for_init_task_complete_) {
  28     waiting_for_init_task_complete_ = false;
  29     TriggerTask();
  30   } else {
  31     LogMetricsInitSequence(INIT_TASK_COMPLETED_FIRST);
  32   }
  33 }
  34
  35 void MetricsRotationScheduler::RotationFinished() {
  36   TaskDone(upload_interval_callback_.Run());
  37 }
  38
  39 void MetricsRotationScheduler::LogMetricsInitSequence(InitSequence sequence) {
  40   UMA_HISTOGRAM_ENUMERATION("UMA.InitSequence", sequence,
  41                             INIT_SEQUENCE_ENUM_SIZE);
  42 }
  43
  44 void MetricsRotationScheduler::TriggerTask() {
  45   // If the timer fired before the init task has completed, don't trigger the
  46   // upload yet - wait for the init task to complete and do it then.
  47   if (!init_task_complete_) {
  48     LogMetricsInitSequence(TIMER_FIRED_FIRST);
  49     waiting_for_init_task_complete_ = true;
  50     return;
  51   }
  52   MetricsScheduler::TriggerTask();
  53 }
  54
  55 }  // namespace metrics