chrome/browser/chromeos/drive/debug_info_collector.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 CHROME_BROWSER_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_
   6 #define CHROME_BROWSER_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback_forward.h"
  10 #include "base/threading/thread_checker.h"
  11 #include "components/drive/file_system_interface.h"
  12
  13 namespace drive {
  14
  15 // This class provides some methods which are useful to show the debug
  16 // info on chrome://drive-internals page.
  17 // All the method should be called on UI thread.
  18 class DebugInfoCollector {
  19  public:
  20   // Callback for ReadDirectory().
  21   typedef base::Callback<void(FileError error,
  22                               scoped_ptr<ResourceEntryVector> entries)>
  23       ReadDirectoryCallback;
  24
  25   // Callback for IterateFileCache().
  26   typedef base::Callback<void(const std::string& id,
  27                               const FileCacheEntry& cache_entry)>
  28       IterateFileCacheCallback;
  29
  30   DebugInfoCollector(internal::ResourceMetadata* metadata,
  31                      FileSystemInterface* file_system,
  32                      base::SequencedTaskRunner* blocking_task_runner);
  33   ~DebugInfoCollector();
  34
  35   // Finds a locally stored entry (a file or a directory) by |file_path|.
  36   // |callback| must not be null.
  37   void GetResourceEntry(const base::FilePath& file_path,
  38                         const GetResourceEntryCallback& callback);
  39
  40   // Finds and reads a directory by |file_path|.
  41   // |callback| must not be null.
  42   void ReadDirectory(const base::FilePath& file_path,
  43                      const ReadDirectoryCallback& callback);
  44
  45
  46   // Iterates all files in the file cache and calls |iteration_callback| for
  47   // each file. |completion_callback| is run upon completion.
  48   // |iteration_callback| and |completion_callback| must not be null.
  49   void IterateFileCache(const IterateFileCacheCallback& iteration_callback,
  50                         const base::Closure& completion_callback);
  51
  52   // Returns miscellaneous metadata of the file system like the largest
  53   // timestamp. |callback| must not be null.
  54   void GetMetadata(const GetFilesystemMetadataCallback& callback);
  55
  56  private:
  57   internal::ResourceMetadata* metadata_;  // No owned.
  58   FileSystemInterface* file_system_;  // Not owned.
  59   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  60
  61   base::ThreadChecker thread_checker_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(DebugInfoCollector);
  64 };
  65
  66 }  // namespace drive
  67
  68 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_