chrome/browser/metrics/android_metrics_provider.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   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 "chrome/browser/metrics/android_metrics_provider.h"
   6
   7 #include "base/metrics/histogram.h"
   8 #include "base/prefs/pref_registry_simple.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "base/prefs/scoped_user_pref_update.h"
  11 #include "base/values.h"
  12 #include "chrome/browser/android/feature_utilities.h"
  13 #include "chrome/common/pref_names.h"
  14
  15 namespace {
  16
  17 // Increments a particular entry in the ListValue.
  18 void IncrementListValue(base::ListValue* counts, int index) {
  19   int current_count = 0;
  20   counts->GetInteger(index, &current_count);
  21   counts->Set(index, new base::FundamentalValue(current_count + 1));
  22 }
  23
  24 // Takes an int corresponding to a Type and returns the corresponding flag.
  25 int GetActivityFlag(int type_id) {
  26   ActivityTypeIds::Type type = ActivityTypeIds::GetActivityType(type_id);
  27   DCHECK_LT(type, ActivityTypeIds::ACTIVITY_MAX_VALUE);
  28   return (1 << type);
  29 }
  30
  31 }  // namespace
  32
  33 AndroidMetricsProvider::AndroidMetricsProvider(PrefService* local_state)
  34     : local_state_(local_state) {
  35   LogStabilityToPrefs();
  36 }
  37
  38 AndroidMetricsProvider::~AndroidMetricsProvider() {
  39 }
  40
  41 void AndroidMetricsProvider::ProvideStabilityMetrics(
  42     metrics::SystemProfileProto* system_profile_proto) {
  43   ConvertStabilityPrefsToHistograms();
  44 }
  45
  46 void AndroidMetricsProvider::ProvideGeneralMetrics(
  47     metrics::ChromeUserMetricsExtension* uma_proto) {
  48   UMA_HISTOGRAM_ENUMERATION(
  49       "DocumentActivity.Enabled",
  50       chrome::android::GetDocumentModeValue(),
  51       chrome::android::RUNNING_MODE_MAX);
  52 }
  53
  54 void AndroidMetricsProvider::OnForegroundActivityChanged(
  55     ActivityTypeIds::Type type) {
  56   DCHECK_LT(type, ActivityTypeIds::ACTIVITY_MAX_VALUE);
  57
  58   if (type == local_state_->GetInteger(prefs::kStabilityForegroundActivityType))
  59     return;
  60
  61   // Record that the Activity is now in the foreground.
  62   local_state_->SetInteger(prefs::kStabilityForegroundActivityType, type);
  63
  64   // Record that the Activity was launched this sesaion.
  65   // The pref stores a set of flags ORed together, where each set flag
  66   // corresponds to a launched Activity type.
  67   int launched =
  68       local_state_->GetInteger(prefs::kStabilityLaunchedActivityFlags);
  69   if (type != ActivityTypeIds::ACTIVITY_NONE) {
  70     launched |= GetActivityFlag(type);
  71     local_state_->SetInteger(prefs::kStabilityLaunchedActivityFlags, launched);
  72   }
  73
  74   local_state_->CommitPendingWrite();
  75 }
  76
  77 // static
  78 void AndroidMetricsProvider::RegisterPrefs(PrefRegistrySimple* registry) {
  79   registry->RegisterIntegerPref(prefs::kStabilityForegroundActivityType,
  80                                 ActivityTypeIds::ACTIVITY_NONE);
  81   registry->RegisterIntegerPref(prefs::kStabilityLaunchedActivityFlags, 0);
  82   registry->RegisterListPref(prefs::kStabilityLaunchedActivityCounts);
  83   registry->RegisterListPref(prefs::kStabilityCrashedActivityCounts);
  84 }
  85
  86 void AndroidMetricsProvider::LogStabilityToPrefs() {
  87   // Track which Activities were launched by the user.
  88   // A 'launch' is defined as starting the Activity at least once during a
  89   // UMA session.  Multiple launches are counted only once since it is possible
  90   // for users to hop between Activities (e.g. entering and leaving Settings).
  91   const int launched =
  92       local_state_->GetInteger(prefs::kStabilityLaunchedActivityFlags);
  93   ListPrefUpdate update_launches(local_state_,
  94                                  prefs::kStabilityLaunchedActivityCounts);
  95   base::ListValue* launch_counts = update_launches.Get();
  96   for (int activity_type = ActivityTypeIds::ACTIVITY_NONE;
  97        activity_type < ActivityTypeIds::ACTIVITY_MAX_VALUE;
  98        ++activity_type) {
  99     if (launched & GetActivityFlag(activity_type))
 100       IncrementListValue(launch_counts, activity_type);
 101   }
 102   local_state_->SetInteger(prefs::kStabilityLaunchedActivityFlags, 0);
 103
 104   // Track any Activities that were in the foreground when Chrome died.
 105   // These Activities failed to be recorded as leaving the foreground, so Chrome
 106   // couldn't have ended the UMA session cleanly.  Record them as crashing.
 107   const int foreground =
 108       local_state_->GetInteger(prefs::kStabilityForegroundActivityType);
 109   if (foreground != ActivityTypeIds::ACTIVITY_NONE) {
 110     ListPrefUpdate update_crashes(local_state_,
 111                                   prefs::kStabilityCrashedActivityCounts);
 112     base::ListValue* crash_counts = update_crashes.Get();
 113     IncrementListValue(crash_counts, foreground);
 114     local_state_->SetInteger(prefs::kStabilityForegroundActivityType,
 115                              ActivityTypeIds::ACTIVITY_NONE);
 116   }
 117
 118   local_state_->CommitPendingWrite();
 119 }
 120
 121 void AndroidMetricsProvider::ConvertStabilityPrefsToHistograms() {
 122   ListPrefUpdate launch_updater(local_state_,
 123                                 prefs::kStabilityLaunchedActivityCounts);
 124   ListPrefUpdate crash_updater(local_state_,
 125                                prefs::kStabilityCrashedActivityCounts);
 126
 127   base::ListValue* launch_counts = launch_updater.Get();
 128   base::ListValue* crash_counts = crash_updater.Get();
 129
 130   for (int activity_type = ActivityTypeIds::ACTIVITY_NONE;
 131        activity_type < ActivityTypeIds::ACTIVITY_MAX_VALUE;
 132        ++activity_type) {
 133     int launch_count = 0;
 134     int crash_count = 0;
 135
 136     launch_counts->GetInteger(activity_type, &launch_count);
 137     crash_counts->GetInteger(activity_type, &crash_count);
 138
 139     for (int count = 0; count < launch_count; ++count) {
 140       UMA_STABILITY_HISTOGRAM_ENUMERATION(
 141           "Chrome.Android.Activity.LaunchCounts",
 142           activity_type,
 143           ActivityTypeIds::ACTIVITY_MAX_VALUE);
 144     }
 145
 146     for (int count = 0; count < crash_count; ++count) {
 147       UMA_STABILITY_HISTOGRAM_ENUMERATION("Chrome.Android.Activity.CrashCounts",
 148                                           activity_type,
 149                                           ActivityTypeIds::ACTIVITY_MAX_VALUE);
 150     }
 151   }
 152
 153   launch_counts->Clear();
 154   crash_counts->Clear();
 155 }