components/proximity_auth/throttled_bluetooth_connection_finder.h

   1 // Copyright 2015 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_PROXIMITY_AUTH_THROTTLED_BLUETOOTH_CONNECTION_FINDER_H
   6 #define COMPONENTS_PROXIMITY_AUTH_THROTTLED_BLUETOOTH_CONNECTION_FINDER_H
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "components/proximity_auth/connection_finder.h"
  13
  14 namespace base {
  15 class TaskRunner;
  16 }
  17
  18 namespace proximity_auth {
  19
  20 class BluetoothConnectionFinder;
  21 class BluetoothThrottler;
  22 class Connection;
  23
  24 // A Bluetooth connection finder that delays Find() requests according to the
  25 // throttler's cooldown period.
  26 class ThrottledBluetoothConnectionFinder : public ConnectionFinder {
  27  public:
  28   // Note: The |throttler| is not owned, and must outlive |this| instance.
  29   ThrottledBluetoothConnectionFinder(
  30       scoped_ptr<BluetoothConnectionFinder> connection_finder,
  31       scoped_refptr<base::TaskRunner> task_runner,
  32       BluetoothThrottler* throttler);
  33   ~ThrottledBluetoothConnectionFinder() override;
  34
  35   // ConnectionFinder:
  36   void Find(const ConnectionCallback& connection_callback) override;
  37
  38  private:
  39   // Callback to be called when a connection is found.
  40   void OnConnection(const ConnectionCallback& connection_callback,
  41                     scoped_ptr<Connection> connection);
  42
  43   // The underlying connection finder.
  44   scoped_ptr<BluetoothConnectionFinder> connection_finder_;
  45
  46   // The task runner used for posting delayed messages.
  47   scoped_refptr<base::TaskRunner> task_runner_;
  48
  49   // The throttler managing this connection finder. The throttler is not owned,
  50   // and must outlive |this| instance.
  51   BluetoothThrottler* throttler_;
  52
  53   base::WeakPtrFactory<ThrottledBluetoothConnectionFinder> weak_ptr_factory_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ThrottledBluetoothConnectionFinder);
  56 };
  57
  58 }  // namespace proximity_auth
  59
  60 #endif  // COMPONENTS_PROXIMITY_AUTH_THROTTLED_BLUETOOTH_CONNECTION_FINDER_H