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