src/chrome/browser/sync_file_system/drive_backend/remote_change_processor_on_worker.h

   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 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_REMOTE_CHANGE_PROCESSOR_ON_WORKER_H_
   6 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_REMOTE_CHANGE_PROCESSOR_ON_WORKER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/sequence_checker.h"
  11 #include "chrome/browser/sync_file_system/remote_change_processor.h"
  12
  13 namespace base {
  14 class SingleThreadTaskRunner;
  15 class SequencedTaskRunner;
  16 }
  17
  18 namespace sync_file_system {
  19 namespace drive_backend {
  20
  21 class RemoteChangeProcessorWrapper;
  22
  23 // This class wraps a part of RemoteChangeProcessor class to post actual
  24 // tasks to RemoteChangeProcessorWrapper which lives in another thread.
  25 // Each method wraps corresponding name method of RemoteChangeProcessor.
  26 // See comments in remote_change_processor.h for details.
  27 class RemoteChangeProcessorOnWorker : public RemoteChangeProcessor {
  28  public:
  29   RemoteChangeProcessorOnWorker(
  30       const base::WeakPtr<RemoteChangeProcessorWrapper>& wrapper,
  31       base::SingleThreadTaskRunner* ui_task_runner,
  32       base::SequencedTaskRunner* worker_task_runner);
  33   ~RemoteChangeProcessorOnWorker() override;
  34
  35   void PrepareForProcessRemoteChange(
  36       const storage::FileSystemURL& url,
  37       const PrepareChangeCallback& callback) override;
  38   void ApplyRemoteChange(const FileChange& change,
  39                          const base::FilePath& local_path,
  40                          const storage::FileSystemURL& url,
  41                          const SyncStatusCallback& callback) override;
  42   void FinalizeRemoteSync(const storage::FileSystemURL& url,
  43                           bool clear_local_changes,
  44                           const base::Closure& completion_callback) override;
  45   void RecordFakeLocalChange(const storage::FileSystemURL& url,
  46                              const FileChange& change,
  47                              const SyncStatusCallback& callback) override;
  48
  49   void DetachFromSequence();
  50
  51  private:
  52   base::WeakPtr<RemoteChangeProcessorWrapper> wrapper_;
  53   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
  54   scoped_refptr<base::SequencedTaskRunner> worker_task_runner_;
  55
  56   base::SequenceChecker sequence_checker_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(RemoteChangeProcessorOnWorker);
  59 };
  60
  61 }  // namespace drive_backend
  62 }  // namespace sync_file_system
  63
  64 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_REMOTE_CHANGE_PROCESSOR_ON_WORKER_H_