chromeos/dbus/bluetooth_gatt_service_client.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 "chromeos/dbus/bluetooth_gatt_service_client.h"
   6
   7 #include "base/bind.h"
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/observer_list.h"
  10 #include "dbus/bus.h"
  11 #include "dbus/object_manager.h"
  12 #include "third_party/cros_system_api/dbus/service_constants.h"
  13
  14 namespace chromeos {
  15
  16 BluetoothGattServiceClient::Properties::Properties(
  17     dbus::ObjectProxy* object_proxy,
  18     const std::string& interface_name,
  19     const PropertyChangedCallback&callback)
  20     : dbus::PropertySet(object_proxy, interface_name, callback) {
  21   RegisterProperty(bluetooth_gatt_service::kUUIDProperty, &uuid);
  22   RegisterProperty(bluetooth_gatt_service::kIncludesProperty, &includes);
  23   RegisterProperty(bluetooth_gatt_service::kDeviceProperty, &device);
  24   RegisterProperty(bluetooth_gatt_service::kPrimaryProperty, &primary);
  25   RegisterProperty(bluetooth_gatt_service::kCharacteristicsProperty,
  26                    &characteristics);
  27 }
  28
  29 BluetoothGattServiceClient::Properties::~Properties() {
  30 }
  31
  32 // The BluetoothGattServiceClient implementation used in production.
  33 class BluetoothGattServiceClientImpl : public BluetoothGattServiceClient,
  34                                        public dbus::ObjectManager::Interface {
  35  public:
  36   BluetoothGattServiceClientImpl()
  37       : object_manager_(NULL),
  38         weak_ptr_factory_(this) {
  39   }
  40
  41   ~BluetoothGattServiceClientImpl() override {
  42     object_manager_->UnregisterInterface(
  43         bluetooth_gatt_service::kBluetoothGattServiceInterface);
  44   }
  45
  46   // BluetoothGattServiceClientImpl override.
  47   void AddObserver(BluetoothGattServiceClient::Observer* observer) override {
  48     DCHECK(observer);
  49     observers_.AddObserver(observer);
  50   }
  51
  52   // BluetoothGattServiceClientImpl override.
  53   void RemoveObserver(BluetoothGattServiceClient::Observer* observer) override {
  54     DCHECK(observer);
  55     observers_.RemoveObserver(observer);
  56   }
  57
  58   // BluetoothGattServiceClientImpl override.
  59   std::vector<dbus::ObjectPath> GetServices() override {
  60     DCHECK(object_manager_);
  61     return object_manager_->GetObjectsWithInterface(
  62         bluetooth_gatt_service::kBluetoothGattServiceInterface);
  63   }
  64
  65   // BluetoothGattServiceClientImpl override.
  66   Properties* GetProperties(const dbus::ObjectPath& object_path) override {
  67     DCHECK(object_manager_);
  68     return static_cast<Properties*>(
  69         object_manager_->GetProperties(
  70             object_path,
  71             bluetooth_gatt_service::kBluetoothGattServiceInterface));
  72   }
  73
  74   // dbus::ObjectManager::Interface override.
  75   dbus::PropertySet* CreateProperties(
  76       dbus::ObjectProxy* object_proxy,
  77       const dbus::ObjectPath& object_path,
  78       const std::string& interface_name) override {
  79     Properties* properties = new Properties(
  80         object_proxy,
  81         interface_name,
  82         base::Bind(&BluetoothGattServiceClientImpl::OnPropertyChanged,
  83                    weak_ptr_factory_.GetWeakPtr(),
  84                    object_path));
  85     return static_cast<dbus::PropertySet*>(properties);
  86   }
  87
  88   // dbus::ObjectManager::Interface override.
  89   void ObjectAdded(const dbus::ObjectPath& object_path,
  90                    const std::string& interface_name) override {
  91     VLOG(2) << "Remote GATT service added: " << object_path.value();
  92     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
  93                       GattServiceAdded(object_path));
  94   }
  95
  96   // dbus::ObjectManager::Interface override.
  97   void ObjectRemoved(const dbus::ObjectPath& object_path,
  98                      const std::string& interface_name) override {
  99     VLOG(2) << "Remote GATT service removed: " << object_path.value();
 100     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 101                       GattServiceRemoved(object_path));
 102   }
 103
 104  protected:
 105   // chromeos::DBusClient override.
 106   void Init(dbus::Bus* bus) override {
 107     object_manager_ = bus->GetObjectManager(
 108         bluetooth_object_manager::kBluetoothObjectManagerServiceName,
 109         dbus::ObjectPath(
 110             bluetooth_object_manager::kBluetoothObjectManagerServicePath));
 111     object_manager_->RegisterInterface(
 112         bluetooth_gatt_service::kBluetoothGattServiceInterface, this);
 113   }
 114
 115  private:
 116   // Called by dbus::PropertySet when a property value is changed, either by
 117   // result of a signal or response to a GetAll() or Get() call. Informs
 118   // observers.
 119   virtual void OnPropertyChanged(const dbus::ObjectPath& object_path,
 120                                  const std::string& property_name) {
 121     VLOG(2) << "Remote GATT service property changed: " << object_path.value()
 122             << ": " << property_name;
 123     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 124                       GattServicePropertyChanged(object_path, property_name));
 125   }
 126
 127   dbus::ObjectManager* object_manager_;
 128
 129   // List of observers interested in event notifications from us.
 130   ObserverList<BluetoothGattServiceClient::Observer> observers_;
 131
 132   // Weak pointer factory for generating 'this' pointers that might live longer
 133   // than we do.
 134   // Note: This should remain the last member so it'll be destroyed and
 135   // invalidate its weak pointers before any other members are destroyed.
 136   base::WeakPtrFactory<BluetoothGattServiceClientImpl> weak_ptr_factory_;
 137
 138   DISALLOW_COPY_AND_ASSIGN(BluetoothGattServiceClientImpl);
 139 };
 140
 141 BluetoothGattServiceClient::BluetoothGattServiceClient() {
 142 }
 143
 144 BluetoothGattServiceClient::~BluetoothGattServiceClient() {
 145 }
 146
 147 // static
 148 BluetoothGattServiceClient* BluetoothGattServiceClient::Create() {
 149   return new BluetoothGattServiceClientImpl();
 150 }
 151
 152 }  // namespace chromeos