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   virtual ~BluetoothGattServiceClientImpl() {
  42     object_manager_->UnregisterInterface(
  43         bluetooth_gatt_service::kBluetoothGattServiceInterface);
  44   }
  45
  46   // BluetoothGattServiceClientImpl override.
  47   virtual void AddObserver(
  48       BluetoothGattServiceClient::Observer* observer) OVERRIDE {
  49     DCHECK(observer);
  50     observers_.AddObserver(observer);
  51   }
  52
  53   // BluetoothGattServiceClientImpl override.
  54   virtual void RemoveObserver(
  55       BluetoothGattServiceClient::Observer* observer) OVERRIDE {
  56     DCHECK(observer);
  57     observers_.RemoveObserver(observer);
  58   }
  59
  60   // BluetoothGattServiceClientImpl override.
  61   virtual std::vector<dbus::ObjectPath> GetServices() OVERRIDE {
  62     DCHECK(object_manager_);
  63     return object_manager_->GetObjectsWithInterface(
  64         bluetooth_gatt_service::kBluetoothGattServiceInterface);
  65   }
  66
  67   // BluetoothGattServiceClientImpl override.
  68   virtual Properties* GetProperties(
  69       const dbus::ObjectPath& object_path) OVERRIDE {
  70     DCHECK(object_manager_);
  71     return static_cast<Properties*>(
  72         object_manager_->GetProperties(
  73             object_path,
  74             bluetooth_gatt_service::kBluetoothGattServiceInterface));
  75   }
  76
  77   // dbus::ObjectManager::Interface override.
  78   virtual dbus::PropertySet* CreateProperties(
  79       dbus::ObjectProxy *object_proxy,
  80       const dbus::ObjectPath& object_path,
  81       const std::string& interface_name) OVERRIDE {
  82     Properties* properties = new Properties(
  83         object_proxy,
  84         interface_name,
  85         base::Bind(&BluetoothGattServiceClientImpl::OnPropertyChanged,
  86                    weak_ptr_factory_.GetWeakPtr(),
  87                    object_path));
  88     return static_cast<dbus::PropertySet*>(properties);
  89   }
  90
  91   // dbus::ObjectManager::Interface override.
  92   virtual void ObjectAdded(const dbus::ObjectPath& object_path,
  93                            const std::string& interface_name) OVERRIDE {
  94     VLOG(2) << "Remote GATT service added: " << object_path.value();
  95     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
  96                       GattServiceAdded(object_path));
  97   }
  98
  99   // dbus::ObjectManager::Interface override.
 100   virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
 101                              const std::string& interface_name) OVERRIDE {
 102     VLOG(2) << "Remote GATT service removed: " << object_path.value();
 103     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 104                       GattServiceRemoved(object_path));
 105   }
 106
 107  protected:
 108   // chromeos::DBusClient override.
 109   virtual void Init(dbus::Bus* bus) OVERRIDE {
 110     object_manager_ = bus->GetObjectManager(
 111         bluetooth_object_manager::kBluetoothObjectManagerServiceName,
 112         dbus::ObjectPath(
 113             bluetooth_object_manager::kBluetoothObjectManagerServicePath));
 114     object_manager_->RegisterInterface(
 115         bluetooth_gatt_service::kBluetoothGattServiceInterface, this);
 116   }
 117
 118  private:
 119   // Called by dbus::PropertySet when a property value is changed, either by
 120   // result of a signal or response to a GetAll() or Get() call. Informs
 121   // observers.
 122   virtual void OnPropertyChanged(const dbus::ObjectPath& object_path,
 123                                  const std::string& property_name) {
 124     VLOG(2) << "Remote GATT service property changed: " << object_path.value()
 125             << ": " << property_name;
 126     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 127                       GattServicePropertyChanged(object_path, property_name));
 128   }
 129
 130   dbus::ObjectManager* object_manager_;
 131
 132   // List of observers interested in event notifications from us.
 133   ObserverList<BluetoothGattServiceClient::Observer> observers_;
 134
 135   // Weak pointer factory for generating 'this' pointers that might live longer
 136   // than we do.
 137   // Note: This should remain the last member so it'll be destroyed and
 138   // invalidate its weak pointers before any other members are destroyed.
 139   base::WeakPtrFactory<BluetoothGattServiceClientImpl> weak_ptr_factory_;
 140
 141   DISALLOW_COPY_AND_ASSIGN(BluetoothGattServiceClientImpl);
 142 };
 143
 144 BluetoothGattServiceClient::BluetoothGattServiceClient() {
 145 }
 146
 147 BluetoothGattServiceClient::~BluetoothGattServiceClient() {
 148 }
 149
 150 // static
 151 BluetoothGattServiceClient* BluetoothGattServiceClient::Create() {
 152   return new BluetoothGattServiceClientImpl();
 153 }
 154
 155 }  // namespace chromeos