components/cronet/android/cronet_in_memory_pref_store.h

   1 // Copyright 2015 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_CRONET_ANDROID_CRONET_IN_MEMORY_PREF_STORE_H_
   6 #define COMPONENTS_CRONET_ANDROID_CRONET_IN_MEMORY_PREF_STORE_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/observer_list.h"
  13 #include "base/prefs/persistent_pref_store.h"
  14 #include "base/prefs/pref_value_map.h"
  15
  16 namespace base {
  17 class Value;
  18 }
  19
  20 // A light-weight prefstore implementation that keeps preferences
  21 // in a memory backed store. This is not a persistent prefstore.
  22 // TODO(bengr): Move to base/prefs or some other shared location.
  23 class CronetInMemoryPrefStore : public PersistentPrefStore {
  24  public:
  25   CronetInMemoryPrefStore();
  26
  27   // PrefStore overrides:
  28   bool GetValue(const std::string& key,
  29                 const base::Value** result) const override;
  30   void AddObserver(PrefStore::Observer* observer) override;
  31   void RemoveObserver(PrefStore::Observer* observer) override;
  32   bool HasObservers() const override;
  33   bool IsInitializationComplete() const override;
  34
  35   // PersistentPrefStore overrides:
  36   bool GetMutableValue(const std::string& key, base::Value** result) override;
  37   void ReportValueChanged(const std::string& key, uint32 flags) override;
  38   void SetValue(const std::string& key,
  39                 base::Value* value,
  40                 uint32 flags) override;
  41   void SetValueSilently(const std::string& key,
  42                         base::Value* value,
  43                         uint32 flags) override;
  44   void RemoveValue(const std::string& key, uint32 flags) override;
  45   bool ReadOnly() const override;
  46   PrefReadError GetReadError() const override;
  47   PersistentPrefStore::PrefReadError ReadPrefs() override;
  48   void ReadPrefsAsync(ReadErrorDelegate* error_delegate) override;
  49   void CommitPendingWrite() override {}
  50
  51  private:
  52   ~CronetInMemoryPrefStore() override;
  53
  54   // Stores the preference values.
  55   PrefValueMap prefs_;
  56
  57   base::ObserverList<PrefStore::Observer, true> observers_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(CronetInMemoryPrefStore);
  60 };
  61
  62 #endif  // COMPONENTS_CRONET_ANDROID_CRONET_IN_MEMORY_PREF_STORE_H_