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_rollback_manager.h"
6
7 #include "sync/internal_api/public/base/model_type.h"
8 #include "sync/internal_api/public/read_node.h"
9 #include "sync/internal_api/public/read_transaction.h"
10 #include "sync/internal_api/public/util/syncer_error.h"
11 #include "sync/internal_api/public/write_transaction.h"
12 #include "sync/syncable/directory.h"
13 #include "sync/syncable/mutable_entry.h"
14 #include "url/gurl.h"
15
16 namespace syncer {
17
SyncRollbackManager()18 SyncRollbackManager::SyncRollbackManager()
19 : change_delegate_(NULL) {
20 }
21
~SyncRollbackManager()22 SyncRollbackManager::~SyncRollbackManager() {
23 }
24
Init(InitArgs * args)25 void SyncRollbackManager::Init(InitArgs* args) {
26 if (SyncRollbackManagerBase::InitInternal(
27 args->database_location,
28 args->internal_components_factory.get(),
29 InternalComponentsFactory::STORAGE_ON_DISK,
30 args->unrecoverable_error_handler.Pass(),
31 args->report_unrecoverable_error_function)) {
32 change_delegate_ = args->change_delegate;
33
34 for (size_t i = 0; i < args->workers.size(); ++i) {
35 ModelSafeGroup group = args->workers[i]->GetModelSafeGroup();
36 CHECK(workers_.find(group) == workers_.end());
37 workers_[group] = args->workers[i];
38 }
39
40 rollback_ready_types_ = GetUserShare()->directory->InitialSyncEndedTypes();
41 rollback_ready_types_.RetainAll(BackupTypes());
42 }
43 }
44
StartSyncingNormally(const ModelSafeRoutingInfo & routing_info)45 void SyncRollbackManager::StartSyncingNormally(
46 const ModelSafeRoutingInfo& routing_info){
47 if (rollback_ready_types_.Empty()) {
48 NotifyRollbackDone();
49 return;
50 }
51
52 std::map<ModelType, syncable::Directory::Metahandles> to_delete;
53 {
54 WriteTransaction trans(FROM_HERE, GetUserShare());
55 syncable::Directory::Metahandles unsynced;
56 GetUserShare()->directory->GetUnsyncedMetaHandles(trans.GetWrappedTrans(),
57 &unsynced);
58 for (size_t i = 0; i < unsynced.size(); ++i) {
59 syncable::MutableEntry e(trans.GetWrappedWriteTrans(),
60 syncable::GET_BY_HANDLE, unsynced[i]);
61 if (!e.good() || e.GetIsDel() || e.GetId().ServerKnows())
62 continue;
63
64 // TODO(haitaol): roll back entries that are backed up but whose content
65 // is merged with local model during association.
66
67 ModelType type = GetModelTypeFromSpecifics(e.GetSpecifics());
68 if (!rollback_ready_types_.Has(type))
69 continue;
70
71 to_delete[type].push_back(unsynced[i]);
72 }
73 }
74
75 for (std::map<ModelType, syncable::Directory::Metahandles>::iterator it =
76 to_delete.begin(); it != to_delete.end(); ++it) {
77 ModelSafeGroup group = routing_info.find(it->first)->second;
78 CHECK(workers_.find(group) != workers_.end());
79 workers_[group]->DoWorkAndWaitUntilDone(
80 base::Bind(&SyncRollbackManager::DeleteOnWorkerThread,
81 base::Unretained(this),
82 it->first, it->second));
83 }
84
85 NotifyRollbackDone();
86 }
87
DeleteOnWorkerThread(ModelType type,std::vector<int64> handles)88 SyncerError SyncRollbackManager::DeleteOnWorkerThread(
89 ModelType type, std::vector<int64> handles) {
90 CHECK(change_delegate_);
91
92 {
93 ChangeRecordList deletes;
94 WriteTransaction trans(FROM_HERE, GetUserShare());
95 for (size_t i = 0; i < handles.size(); ++i) {
96 syncable::MutableEntry e(trans.GetWrappedWriteTrans(),
97 syncable::GET_BY_HANDLE, handles[i]);
98 if (!e.good() || e.GetIsDel())
99 continue;
100
101 ChangeRecord del;
102 del.action = ChangeRecord::ACTION_DELETE;
103 del.id = handles[i];
104 del.specifics = e.GetSpecifics();
105 deletes.push_back(del);
106 }
107
108 change_delegate_->OnChangesApplied(type, 1, &trans,
109 MakeImmutable(&deletes));
110 }
111
112 change_delegate_->OnChangesComplete(type);
113 return SYNCER_OK;
114 }
115
NotifyRollbackDone()116 void SyncRollbackManager::NotifyRollbackDone() {
117 SyncProtocolError error;
118 error.action = ROLLBACK_DONE;
119 FOR_EACH_OBSERVER(SyncManager::Observer, *GetObservers(),
120 OnActionableError(error));
121 }
122
123 } // namespace syncer
124