src/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 "chrome/browser/chromeos/drive/file_cache.h"
  11 #include "chrome/browser/chromeos/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 IterateFileCache().
  21   typedef base::Callback<void(const std::string& id,
  22                               const FileCacheEntry& cache_entry)>
  23       IterateFileCacheCallback;
  24
  25   DebugInfoCollector(FileSystemInterface* file_system,
  26                      internal::FileCache* file_cache,
  27                      base::SequencedTaskRunner* blocking_task_runner);
  28   ~DebugInfoCollector();
  29
  30   // Iterates all files in the file cache and calls |iteration_callback| for
  31   // each file. |completion_callback| is run upon completion.
  32   // |iteration_callback| and |completion_callback| must not be null.
  33   void IterateFileCache(const IterateFileCacheCallback& iteration_callback,
  34                         const base::Closure& completion_callback);
  35
  36   // Returns miscellaneous metadata of the file system like the largest
  37   // timestamp. |callback| must not be null.
  38   void GetMetadata(const GetFilesystemMetadataCallback& callback);
  39
  40  private:
  41   FileSystemInterface* file_system_;  // Not owned.
  42   internal::FileCache* file_cache_;  // Not owned.
  43   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(DebugInfoCollector);
  46 };
  47
  48 }  // namespace drive
  49
  50 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_