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| 1 // Copyright (c) 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 #include "sync/syncable/deferred_on_disk_directory_backing_store.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/metrics/histogram.h" | |
| 9 #include "base/stl_util.h" | |
| 10 #include "sync/syncable/syncable-inl.h" | |
| 11 | |
| 12 namespace syncer { | |
| 13 namespace syncable { | |
| 14 | |
| 15 DeferredOnDiskDirectoryBackingStore::DeferredOnDiskDirectoryBackingStore( | |
| 16 const std::string& dir_name, const base::FilePath& backing_filepath) | |
| 17 : DirectoryBackingStore(dir_name), | |
| 18 backing_filepath_(backing_filepath), | |
| 19 db_is_on_disk_(false) { | |
| 20 } | |
| 21 | |
| 22 DeferredOnDiskDirectoryBackingStore::~DeferredOnDiskDirectoryBackingStore() {} | |
| 23 | |
| 24 bool DeferredOnDiskDirectoryBackingStore::SaveChanges( | |
| 25 const Directory::SaveChangesSnapshot& snapshot) { | |
| 26 DCHECK(CalledOnValidThread()); | |
| 27 | |
| 28 // Back out early if there is nothing to save. | |
| 29 if (snapshot.dirty_metas.empty() && snapshot.metahandles_to_purge.empty() && | |
| 30 snapshot.delete_journals.empty() && | |
| 31 snapshot.delete_journals_to_purge.empty()) { | |
| 32 return true; | |
| 33 } | |
| 34 | |
| 35 if (!db_is_on_disk_) { | |
| 36 if (!base::DeleteFile(backing_filepath_, false)) | |
| 37 return false; | |
| 38 | |
| 39 // Reopen DB on disk. | |
| 40 db_.reset(new sql::Connection); | |
| 41 db_->set_exclusive_locking(); | |
| 42 db_->set_page_size(4096); | |
| 43 if (!db_->Open(backing_filepath_) || !InitializeTables()) | |
| 44 return false; | |
| 45 | |
| 46 db_is_on_disk_ = true; | |
| 47 } | |
| 48 | |
| 49 return DirectoryBackingStore::SaveChanges(snapshot); | |
| 50 } | |
| 51 | |
| 52 DirOpenResult DeferredOnDiskDirectoryBackingStore::Load( | |
| 53 Directory::MetahandlesMap* handles_map, | |
| 54 JournalIndex* delete_journals, | |
| 55 Directory::KernelLoadInfo* kernel_load_info) { | |
| 56 // Open an in-memory database at first to create initial sync data needed by | |
| 57 // Directory. | |
| 58 CHECK(!db_->is_open()); | |
| 59 if (!db_->OpenInMemory()) | |
| 60 return FAILED_OPEN_DATABASE; | |
| 61 | |
| 62 if (!InitializeTables()) | |
| 63 return FAILED_OPEN_DATABASE; | |
| 64 if (!LoadEntries(handles_map)) | |
| 65 return FAILED_DATABASE_CORRUPT; | |
| 66 if (!LoadInfo(kernel_load_info)) | |
| 67 return FAILED_DATABASE_CORRUPT; | |
| 68 | |
| 69 return OPENED; | |
| 70 } | |
| 71 | |
| 72 } // namespace syncable | |
| 73 } // namespace syncer | |
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Chromium Code Reviews
Issue 477813002:
Revert of Let SyncBackupManager keep backup data in memory until shutdown. Only persist (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src