src/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 namespace {
  17
  18 // TODO(armansito): Add these to service_constants.h when they are defined
  19 // in the BlueZ doc.
  20 const char kDeviceProperty[] = "Device";
  21 const char kPrimaryProperty[] = "Primary";
  22
  23 }  // namespace
  24
  25 BluetoothGattServiceClient::Properties::Properties(
  26     dbus::ObjectProxy* object_proxy,
  27     const std::string& interface_name,
  28     const PropertyChangedCallback&callback)
  29     : dbus::PropertySet(object_proxy, interface_name, callback) {
  30   RegisterProperty(bluetooth_gatt_service::kUUIDProperty, &uuid);
  31   RegisterProperty(bluetooth_gatt_service::kIncludesProperty, &includes);
  32   RegisterProperty(kDeviceProperty, &device);
  33   RegisterProperty(kPrimaryProperty, &primary);
  34 }
  35
  36 BluetoothGattServiceClient::Properties::~Properties() {
  37 }
  38
  39 // The BluetoothGattServiceClient implementation used in production.
  40 class BluetoothGattServiceClientImpl : public BluetoothGattServiceClient,
  41                                        public dbus::ObjectManager::Interface {
  42  public:
  43   BluetoothGattServiceClientImpl()
  44       : object_manager_(NULL),
  45         weak_ptr_factory_(this) {
  46   }
  47
  48   virtual ~BluetoothGattServiceClientImpl() {
  49     object_manager_->UnregisterInterface(
  50         bluetooth_gatt_service::kBluetoothGattServiceInterface);
  51   }
  52
  53   // BluetoothGattServiceClientImpl override.
  54   virtual void AddObserver(
  55       BluetoothGattServiceClient::Observer* observer) OVERRIDE {
  56     DCHECK(observer);
  57     observers_.AddObserver(observer);
  58   }
  59
  60   // BluetoothGattServiceClientImpl override.
  61   virtual void RemoveObserver(
  62       BluetoothGattServiceClient::Observer* observer) OVERRIDE {
  63     DCHECK(observer);
  64     observers_.RemoveObserver(observer);
  65   }
  66
  67   // BluetoothGattServiceClientImpl override.
  68   virtual std::vector<dbus::ObjectPath> GetServices() OVERRIDE {
  69     DCHECK(object_manager_);
  70     return object_manager_->GetObjectsWithInterface(
  71         bluetooth_gatt_service::kBluetoothGattServiceInterface);
  72   }
  73
  74   // BluetoothGattServiceClientImpl override.
  75   virtual Properties* GetProperties(
  76       const dbus::ObjectPath& object_path) OVERRIDE {
  77     DCHECK(object_manager_);
  78     return static_cast<Properties*>(
  79         object_manager_->GetProperties(
  80             object_path,
  81             bluetooth_gatt_service::kBluetoothGattServiceInterface));
  82   }
  83
  84   // dbus::ObjectManager::Interface override.
  85   virtual dbus::PropertySet* CreateProperties(
  86       dbus::ObjectProxy *object_proxy,
  87       const dbus::ObjectPath& object_path,
  88       const std::string& interface_name) OVERRIDE {
  89     Properties* properties = new Properties(
  90         object_proxy,
  91         interface_name,
  92         base::Bind(&BluetoothGattServiceClientImpl::OnPropertyChanged,
  93                    weak_ptr_factory_.GetWeakPtr(),
  94                    object_path));
  95     return static_cast<dbus::PropertySet*>(properties);
  96   }
  97
  98   // dbus::ObjectManager::Interface override.
  99   virtual void ObjectAdded(const dbus::ObjectPath& object_path,
 100                            const std::string& interface_name) OVERRIDE {
 101     VLOG(2) << "Remote GATT service added: " << object_path.value();
 102     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 103                       GattServiceAdded(object_path));
 104   }
 105
 106   // dbus::ObjectManager::Interface override.
 107   virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
 108                              const std::string& interface_name) OVERRIDE {
 109     VLOG(2) << "Remote GATT service removed: " << object_path.value();
 110     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 111                       GattServiceRemoved(object_path));
 112   }
 113
 114  protected:
 115   // chromeos::DBusClient override.
 116   virtual void Init(dbus::Bus* bus) OVERRIDE {
 117     object_manager_ = bus->GetObjectManager(
 118         bluetooth_object_manager::kBluetoothObjectManagerServiceName,
 119         dbus::ObjectPath(
 120             bluetooth_object_manager::kBluetoothObjectManagerServicePath));
 121     object_manager_->RegisterInterface(
 122         bluetooth_gatt_service::kBluetoothGattServiceInterface, this);
 123   }
 124
 125  private:
 126   // Called by dbus::PropertySet when a property value is changed, either by
 127   // result of a signal or response to a GetAll() or Get() call. Informs
 128   // observers.
 129   virtual void OnPropertyChanged(const dbus::ObjectPath& object_path,
 130                                  const std::string& property_name) {
 131     VLOG(2) << "Remote GATT service property changed: " << object_path.value()
 132             << ": " << property_name;
 133     FOR_EACH_OBSERVER(BluetoothGattServiceClient::Observer, observers_,
 134                       GattServicePropertyChanged(object_path, property_name));
 135   }
 136
 137   dbus::ObjectManager* object_manager_;
 138
 139   // List of observers interested in event notifications from us.
 140   ObserverList<BluetoothGattServiceClient::Observer> observers_;
 141
 142   // Weak pointer factory for generating 'this' pointers that might live longer
 143   // than we do.
 144   // Note: This should remain the last member so it'll be destroyed and
 145   // invalidate its weak pointers before any other members are destroyed.
 146   base::WeakPtrFactory<BluetoothGattServiceClientImpl> weak_ptr_factory_;
 147
 148   DISALLOW_COPY_AND_ASSIGN(BluetoothGattServiceClientImpl);
 149 };
 150
 151 BluetoothGattServiceClient::BluetoothGattServiceClient() {
 152 }
 153
 154 BluetoothGattServiceClient::~BluetoothGattServiceClient() {
 155 }
 156
 157 // static
 158 BluetoothGattServiceClient* BluetoothGattServiceClient::Create() {
 159   return new BluetoothGattServiceClientImpl();
 160 }
 161
 162 }  // namespace chromeos