Refactor DBusThreadManager to split away BT clients.

chromeos/dbus/bluetooth_gatt_characteristic_client.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROMEOS_DBUS_BLUETOOTH_GATT_CHARACTERISTIC_CLIENT_H_
-#define CHROMEOS_DBUS_BLUETOOTH_GATT_CHARACTERISTIC_CLIENT_H_
-
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "chromeos/chromeos_export.h"
-#include "chromeos/dbus/dbus_client.h"
-#include "dbus/object_path.h"
-#include "dbus/property.h"
-
-namespace chromeos {
-
-// BluetoothGattCharacteristicClient is used to communicate with remote GATT
-// characteristic objects exposed by the Bluetooth daemon.
-class CHROMEOS_EXPORT BluetoothGattCharacteristicClient : public DBusClient {
- public:
-  // Structure of properties associated with GATT characteristics.
-  struct Properties : public dbus::PropertySet {
-    // The 128-bit characteristic UUID. [read-only]
-    dbus::Property<std::string> uuid;
-
-    // Object path of the GATT service the characteristic belongs to.
-    // [read-only]
-    dbus::Property<dbus::ObjectPath> service;
-
-    // The cached value of the characteristic. This property gets updated only
-    // after a successful read request and when a notification or indication is
-    // received. [read-only]
-    dbus::Property<std::vector<uint8_t>> value;
-
-    // Whether or not this characteristic is currently sending ValueUpdated
-    // signals. [read-only]
-    dbus::Property<bool> notifying;
-
-    // List of flags representing the GATT "Characteristic Properties bit field"
-    // and properties read from the GATT "Characteristic Extended Properties"
-    // descriptor bit field. [read-only, optional]
-    dbus::Property<std::vector<std::string>> flags;
-
-    // Array of object paths representing the descriptors of this
-    // characteristic. [read-only]
-    dbus::Property<std::vector<dbus::ObjectPath>> descriptors;
-
-    Properties(dbus::ObjectProxy* object_proxy,
-               const std::string& interface_name,
-               const PropertyChangedCallback& callback);
-    ~Properties() override;
-  };
-
-  // Interface for observing changes from a remote GATT characteristic.
-  class Observer {
-   public:
-    virtual ~Observer() {}
-
-    // Called when the GATT characteristic with object path |object_path| is
-    // added to the system.
-    virtual void GattCharacteristicAdded(const dbus::ObjectPath& object_path) {}
-
-    // Called when the GATT characteristic with object path |object_path| is
-    // removed from the system.
-    virtual void GattCharacteristicRemoved(
-        const dbus::ObjectPath& object_path) {}
-
-    // Called when the GATT characteristic with object path |object_path| has a
-    // change in the value of the property named |property_name|.
-    virtual void GattCharacteristicPropertyChanged(
-        const dbus::ObjectPath& object_path,
-        const std::string& property_name) {}
-  };
-
-  // Callbacks used to report the result of asynchronous methods.
-  typedef base::Callback<void(const std::string& error_name,
-                              const std::string& error_message)> ErrorCallback;
-  typedef base::Callback<void(const std::vector<uint8>& value)> ValueCallback;
-
-  ~BluetoothGattCharacteristicClient() override;
-
-  // Adds and removes observers for events on all remote GATT characteristics.
-  // Check the |object_path| parameter of observer methods to determine which
-  // GATT characteristic is issuing the event.
-  virtual void AddObserver(Observer* observer) = 0;
-  virtual void RemoveObserver(Observer* observer) = 0;
-
-  // Returns the list of GATT characteristic object paths known to the system.
-  virtual std::vector<dbus::ObjectPath> GetCharacteristics() = 0;
-
-  // Obtain the properties for the GATT characteristic with object path
-  // |object_path|. Values should be copied if needed.
-  virtual Properties* GetProperties(const dbus::ObjectPath& object_path) = 0;
-
-  // Issues a request to read the value of GATT characteristic with object path
-  // |object_path| and returns the value in |callback| on success. On error,
-  // invokes |error_callback|.
-  virtual void ReadValue(const dbus::ObjectPath& object_path,
-                         const ValueCallback& callback,
-                         const ErrorCallback& error_callback) = 0;
-
-  // Issues a request to write the value of GATT characteristic with object path
-  // |object_path| with value |value|. Invokes |callback| on success and
-  // |error_callback| on failure.
-  virtual void WriteValue(const dbus::ObjectPath& object_path,
-                          const std::vector<uint8>& value,
-                          const base::Closure& callback,
-                          const ErrorCallback& error_callback) = 0;
-
-  // Starts a notification session from this characteristic with object path
-  // |object_path| if it supports value notifications or indications. Invokes
-  // |callback| on success and |error_callback| on failure.
-  virtual void StartNotify(const dbus::ObjectPath& object_path,
-                           const base::Closure& callback,
-                           const ErrorCallback& error_callback) = 0;
-
-  // Cancels any previous StartNotify transaction for characteristic with
-  // object path |object_path|. Invokes |callback| on success and
-  // |error_callback| on failure.
-  virtual void StopNotify(const dbus::ObjectPath& object_path,
-                          const base::Closure& callback,
-                          const ErrorCallback& error_callback) = 0;
-
-  // Creates the instance.
-  static BluetoothGattCharacteristicClient* Create();
-
-  // Constants used to indicate exceptional error conditions.
-  static const char kNoResponseError[];
-  static const char kUnknownCharacteristicError[];
-
- protected:
-  BluetoothGattCharacteristicClient();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BluetoothGattCharacteristicClient);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_DBUS_BLUETOOTH_GATT_CHARACTERISTIC_CLIENT_H_