components/policy/core/common/policy_statistics_collector.h

   1 // Copyright (c) 2012 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 #ifndef COMPONENTS_POLICY_CORE_COMMON_POLICY_STATISTICS_COLLECTOR_H_
   6 #define COMPONENTS_POLICY_CORE_COMMON_POLICY_STATISTICS_COLLECTOR_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/cancelable_callback.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/time/time.h"
  12 #include "components/policy/core/common/policy_details.h"
  13 #include "components/policy/core/common/schema.h"
  14 #include "components/policy/policy_export.h"
  15
  16 class PrefService;
  17 class PrefRegistrySimple;
  18
  19 namespace base {
  20 class TaskRunner;
  21 }
  22
  23 namespace policy {
  24
  25 class PolicyService;
  26
  27 // Manages regular updates of policy usage UMA histograms.
  28 class POLICY_EXPORT PolicyStatisticsCollector {
  29  public:
  30   // Policy usage statistics update rate, in milliseconds.
  31   static const int kStatisticsUpdateRate;
  32
  33   // Neither |policy_service| nor |prefs| can be NULL and must stay valid
  34   // throughout the lifetime of PolicyStatisticsCollector.
  35   PolicyStatisticsCollector(const GetChromePolicyDetailsCallback& get_details,
  36                             const Schema& chrome_schema,
  37                             PolicyService* policy_service,
  38                             PrefService* prefs,
  39                             const scoped_refptr<base::TaskRunner>& task_runner);
  40   virtual ~PolicyStatisticsCollector();
  41
  42   // Completes initialization and starts periodical statistic updates.
  43   void Initialize();
  44
  45   static void RegisterPrefs(PrefRegistrySimple* registry);
  46
  47  protected:
  48   // protected virtual for mocking.
  49   virtual void RecordPolicyUse(int id);
  50
  51  private:
  52   void CollectStatistics();
  53   void ScheduleUpdate(base::TimeDelta delay);
  54
  55   GetChromePolicyDetailsCallback get_details_;
  56   Schema chrome_schema_;
  57   PolicyService* policy_service_;
  58   PrefService* prefs_;
  59
  60   base::CancelableClosure update_callback_;
  61
  62   const scoped_refptr<base::TaskRunner> task_runner_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(PolicyStatisticsCollector);
  65 };
  66
  67 }  // namespace policy
  68
  69 #endif  // COMPONENTS_POLICY_CORE_COMMON_POLICY_STATISTICS_COLLECTOR_H_