chrome/browser/metrics/variations/variations_request_scheduler_mobile.cc

   1 // Copyright (c) 2013 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/variations/variations_request_scheduler_mobile.h"
   6
   7 #include "base/prefs/pref_service.h"
   8 #include "chrome/common/pref_names.h"
   9
  10 namespace chrome_variations {
  11
  12 namespace {
  13
  14 // Time between seed fetches, in hours.
  15 const int kSeedFetchPeriodHours = 5;
  16
  17 }  // namespace
  18
  19 VariationsRequestSchedulerMobile::VariationsRequestSchedulerMobile(
  20     const base::Closure& task,
  21     PrefService* local_state) :
  22   VariationsRequestScheduler(task), local_state_(local_state) {
  23 }
  24
  25 VariationsRequestSchedulerMobile::~VariationsRequestSchedulerMobile() {
  26 }
  27
  28 void VariationsRequestSchedulerMobile::Start() {
  29   // Check the time of the last request. If it has been longer than the fetch
  30   // period, run the task. Otherwise, do nothing. Note that no future requests
  31   // are scheduled since it is unlikely that the mobile process would live long
  32   // enough for the timer to fire.
  33   const base::Time last_fetch_time = base::Time::FromInternalValue(
  34       local_state_->GetInt64(prefs::kVariationsLastFetchTime));
  35   if (base::Time::Now() >
  36       last_fetch_time + base::TimeDelta::FromHours(kSeedFetchPeriodHours)) {
  37     task().Run();
  38   }
  39 }
  40
  41 void VariationsRequestSchedulerMobile::Reset() {
  42 }
  43
  44 // static
  45 VariationsRequestScheduler* VariationsRequestScheduler::Create(
  46     const base::Closure& task,
  47     PrefService* local_state) {
  48   return new VariationsRequestSchedulerMobile(task, local_state);
  49 }
  50
  51 }  // namespace chrome_variations