components/drive/remove_stale_cache_files.cc

   1 // Copyright (c) 2012 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 #include "components/drive/remove_stale_cache_files.h"
   6
   7 #include "base/logging.h"
   8 #include "components/drive/drive.pb.h"
   9 #include "components/drive/file_cache.h"
  10 #include "components/drive/resource_metadata.h"
  11
  12 namespace drive {
  13 namespace internal {
  14
  15 void RemoveStaleCacheFiles(FileCache* cache,
  16                            ResourceMetadata* resource_metadata) {
  17   scoped_ptr<ResourceMetadata::Iterator> it = resource_metadata->GetIterator();
  18   for (; !it->IsAtEnd(); it->Advance()) {
  19     const ResourceEntry& entry = it->GetValue();
  20     const FileCacheEntry& cache_state =
  21         entry.file_specific_info().cache_state();
  22     // Stale = not dirty but the MD5 does not match.
  23     if (!cache_state.is_dirty() &&
  24         cache_state.md5() != entry.file_specific_info().md5()) {
  25       FileError error = cache->Remove(it->GetID());
  26       LOG_IF(WARNING, error != FILE_ERROR_OK)
  27           << "Failed to remove a stale cache file. resource_id: "
  28           << it->GetID();
  29     }
  30   }
  31 }
  32
  33 }  // namespace internal
  34 }  // namespace drive