components/drive/file_system/touch_operation.h

   1 // Copyright 2013 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_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_
   6 #define COMPONENTS_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/threading/thread_checker.h"
  12 #include "components/drive/file_errors.h"
  13
  14 namespace base {
  15 class FilePath;
  16 class SequencedTaskRunner;
  17 class Time;
  18 }  // namespace base
  19
  20 namespace drive {
  21 namespace internal {
  22 class ResourceMetadata;
  23 }  // namespace internal
  24
  25 class ResourceEntry;
  26
  27 namespace file_system {
  28
  29 class OperationDelegate;
  30
  31 class TouchOperation {
  32  public:
  33   TouchOperation(base::SequencedTaskRunner* blocking_task_runner,
  34                  OperationDelegate* delegate,
  35                  internal::ResourceMetadata* metadata);
  36   ~TouchOperation();
  37
  38   // Touches the file by updating last access time and last modified time.
  39   // Upon completion, invokes |callback|.
  40   // |last_access_time|, |last_modified_time| and |callback| must not be null.
  41   void TouchFile(const base::FilePath& file_path,
  42                  const base::Time& last_access_time,
  43                  const base::Time& last_modified_time,
  44                  const FileOperationCallback& callback);
  45
  46  private:
  47   // Part of TouchFile(). Runs after updating the local state.
  48   void TouchFileAfterUpdateLocalState(const base::FilePath& file_path,
  49                                       const FileOperationCallback& callback,
  50                                       const ResourceEntry* entry,
  51                                       FileError error);
  52
  53   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  54   OperationDelegate* delegate_;
  55   internal::ResourceMetadata* metadata_;
  56
  57   base::ThreadChecker thread_checker_;
  58
  59   // Note: This should remain the last member so it'll be destroyed and
  60   // invalidate the weak pointers before any other members are destroyed.
  61   base::WeakPtrFactory<TouchOperation> weak_ptr_factory_;
  62   DISALLOW_COPY_AND_ASSIGN(TouchOperation);
  63 };
  64
  65 }  // namespace file_system
  66 }  // namespace drive
  67
  68 #endif  // COMPONENTS_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_