sync/internal_api/sync_backup_manager.cc

   1 // Copyright 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/internal_api/sync_backup_manager.h"
   6
   7 #include "sync/internal_api/public/read_node.h"
   8 #include "sync/internal_api/public/write_transaction.h"
   9 #include "sync/syncable/directory.h"
  10 #include "sync/syncable/mutable_entry.h"
  11 #include "url/gurl.h"
  12
  13 namespace syncer {
  14
  15 SyncBackupManager::SyncBackupManager()
  16     : in_normalization_(false) {
  17 }
  18
  19 SyncBackupManager::~SyncBackupManager() {
  20 }
  21
  22 void SyncBackupManager::Init(InitArgs* args) {
  23   if (SyncRollbackManagerBase::InitInternal(
  24           args->database_location,
  25           args->internal_components_factory.get(),
  26           InternalComponentsFactory::STORAGE_ON_DISK_DEFERRED,
  27           args->unrecoverable_error_handler,
  28           args->report_unrecoverable_error_function)) {
  29     GetUserShare()->directory->CollectMetaHandleCounts(
  30         &status_.num_entries_by_type, &status_.num_to_delete_entries_by_type);
  31
  32     HideSyncPreference(PRIORITY_PREFERENCES);
  33     HideSyncPreference(PREFERENCES);
  34   }
  35 }
  36
  37 void SyncBackupManager::SaveChanges() {
  38   if (initialized())
  39     NormalizeEntries();
  40 }
  41
  42 SyncStatus SyncBackupManager::GetDetailedStatus() const {
  43   return status_;
  44 }
  45
  46 ModelTypeSet SyncBackupManager::HandleTransactionEndingChangeEvent(
  47     const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
  48     syncable::BaseTransaction* trans) {
  49   ModelTypeSet types;
  50   if (in_normalization_) {
  51     // Skip if in our own WriteTransaction from NormalizeEntries().
  52     in_normalization_ = false;
  53     return types;
  54   }
  55
  56   for (syncable::EntryKernelMutationMap::const_iterator it =
  57       write_transaction_info.Get().mutations.Get().begin();
  58       it != write_transaction_info.Get().mutations.Get().end(); ++it) {
  59     int64 id = it->first;
  60     if (unsynced_.find(id) == unsynced_.end()) {
  61       unsynced_.insert(id);
  62
  63       const syncable::EntryKernel& e = it->second.mutated;
  64       ModelType type = e.GetModelType();
  65       types.Put(type);
  66       if (!e.ref(syncable::ID).ServerKnows())
  67         status_.num_entries_by_type[type]++;
  68       if (e.ref(syncable::IS_DEL))
  69         status_.num_to_delete_entries_by_type[type]++;
  70     }
  71   }
  72   return types;
  73 }
  74
  75 void SyncBackupManager::NormalizeEntries() {
  76   WriteTransaction trans(FROM_HERE, GetUserShare());
  77   in_normalization_ = true;
  78   for (std::set<int64>::const_iterator it = unsynced_.begin();
  79       it != unsynced_.end(); ++it) {
  80     syncable::MutableEntry entry(trans.GetWrappedWriteTrans(),
  81                                  syncable::GET_BY_HANDLE, *it);
  82     CHECK(entry.good());
  83
  84     if (!entry.GetId().ServerKnows())
  85       entry.PutId(syncable::Id::CreateFromServerId(entry.GetId().value()));
  86     if (!entry.GetParentId().IsNull() && !entry.GetParentId().ServerKnows()) {
  87       entry.PutParentIdPropertyOnly(syncable::Id::CreateFromServerId(
  88           entry.GetParentId().value()));
  89     }
  90     entry.PutBaseVersion(1);
  91     entry.PutIsUnsynced(false);
  92   }
  93   unsynced_.clear();
  94 }
  95
  96 void SyncBackupManager::HideSyncPreference(ModelType type) {
  97   WriteTransaction trans(FROM_HERE, GetUserShare());
  98   ReadNode pref_root(&trans);
  99   if (BaseNode::INIT_OK != pref_root.InitTypeRoot(type))
 100     return;
 101
 102   std::vector<int64> pref_ids;
 103   pref_root.GetChildIds(&pref_ids);
 104   for (uint32 i = 0; i < pref_ids.size(); ++i) {
 105     syncable::MutableEntry entry(trans.GetWrappedWriteTrans(),
 106                                  syncable::GET_BY_HANDLE, pref_ids[i]);
 107     if (entry.good()) {
 108       // HACKY: Set IS_DEL to true to remove entry from parent-children
 109       // index so that it's not returned when syncable service asks
 110       // for sync data. Syncable service then creates entry for local
 111       // model. Then the existing entry is undeleted and set to local value
 112       // because it has the same unique client tag.
 113       entry.PutIsDel(true);
 114       entry.PutIsUnsynced(false);
 115
 116       // Don't persist on disk so that if backup is aborted before receiving
 117       // local preference values, values in sync DB are saved.
 118       GetUserShare()->directory->UnmarkDirtyEntry(
 119           trans.GetWrappedWriteTrans(), &entry);
 120     }
 121   }
 122 }
 123
 124 void SyncBackupManager::ShutdownOnSyncThread(ShutdownReason reason) {
 125   if (reason == SWITCH_MODE_SYNC) {
 126     NormalizeEntries();
 127     GetUserShare()->directory->SaveChanges();
 128   }
 129
 130   SyncRollbackManagerBase::ShutdownOnSyncThread(reason);
 131 }
 132
 133 void SyncBackupManager::RegisterDirectoryTypeDebugInfoObserver(
 134     syncer::TypeDebugInfoObserver* observer) {}
 135
 136 void SyncBackupManager::UnregisterDirectoryTypeDebugInfoObserver(
 137     syncer::TypeDebugInfoObserver* observer) {}
 138
 139 bool SyncBackupManager::HasDirectoryTypeDebugInfoObserver(
 140     syncer::TypeDebugInfoObserver* observer) { return false; }
 141
 142 void SyncBackupManager::RequestEmitDebugInfo() {}
 143
 144 void SyncBackupManager::ClearServerData(
 145     const ClearServerDataCallback& callback) {}
 146
 147 }  // namespace syncer