components/invalidation/ticl_settings_provider.h

   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 #ifndef COMPONENTS_INVALIDATION_TICL_SETTINGS_PROVIDER_H_
   6 #define COMPONENTS_INVALIDATION_TICL_SETTINGS_PROVIDER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/observer_list.h"
  10
  11 namespace invalidation {
  12
  13 // Provides configuration settings to TiclInvalidationService and notifies it
  14 // when the settings change.
  15 class TiclSettingsProvider {
  16  public:
  17   class Observer {
  18    public:
  19     virtual void OnUseGCMChannelChanged() = 0;
  20
  21    protected:
  22     virtual ~Observer();
  23   };
  24
  25   TiclSettingsProvider();
  26   virtual ~TiclSettingsProvider();
  27
  28   virtual bool UseGCMChannel() const = 0;
  29
  30   void AddObserver(Observer* observer);
  31   void RemoveObserver(Observer* observer);
  32
  33  protected:
  34   void FireOnUseGCMChannelChanged();
  35
  36  private:
  37   ObserverList<Observer, true> observers_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(TiclSettingsProvider);
  40 };
  41
  42 }  // namespace invalidation
  43
  44 #endif  // COMPONENTS_INVALIDATION_TICL_SETTINGS_PROVIDER_H_