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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sync/internal_api/sync_rollback_manager.h"
#include "sync/internal_api/public/base/model_type.h"
#include "sync/internal_api/public/read_node.h"
#include "sync/internal_api/public/read_transaction.h"
#include "sync/internal_api/public/util/syncer_error.h"
#include "sync/internal_api/public/write_transaction.h"
#include "sync/syncable/directory.h"
#include "sync/syncable/mutable_entry.h"
#include "url/gurl.h"
namespace syncer {
SyncRollbackManager::SyncRollbackManager()
: change_delegate_(NULL) {
}
SyncRollbackManager::~SyncRollbackManager() {
}
void SyncRollbackManager::Init(InitArgs* args) {
if (SyncRollbackManagerBase::InitInternal(
args->database_location,
args->internal_components_factory.get(),
InternalComponentsFactory::STORAGE_ON_DISK,
args->unrecoverable_error_handler.Pass(),
args->report_unrecoverable_error_function)) {
change_delegate_ = args->change_delegate;
for (size_t i = 0; i < args->workers.size(); ++i) {
ModelSafeGroup group = args->workers[i]->GetModelSafeGroup();
CHECK(workers_.find(group) == workers_.end());
workers_[group] = args->workers[i];
}
rollback_ready_types_ = GetUserShare()->directory->InitialSyncEndedTypes();
rollback_ready_types_.RetainAll(BackupTypes());
}
}
void SyncRollbackManager::StartSyncingNormally(
const ModelSafeRoutingInfo& routing_info){
if (rollback_ready_types_.Empty()) {
NotifyRollbackDone();
return;
}
std::map<ModelType, syncable::Directory::Metahandles> to_delete;
{
WriteTransaction trans(FROM_HERE, GetUserShare());
syncable::Directory::Metahandles unsynced;
GetUserShare()->directory->GetUnsyncedMetaHandles(trans.GetWrappedTrans(),
&unsynced);
for (size_t i = 0; i < unsynced.size(); ++i) {
syncable::MutableEntry e(trans.GetWrappedWriteTrans(),
syncable::GET_BY_HANDLE, unsynced[i]);
if (!e.good() || e.GetIsDel() || e.GetId().ServerKnows())
continue;
// TODO(haitaol): roll back entries that are backed up but whose content
// is merged with local model during association.
ModelType type = GetModelTypeFromSpecifics(e.GetSpecifics());
if (!rollback_ready_types_.Has(type))
continue;
to_delete[type].push_back(unsynced[i]);
}
}
for (std::map<ModelType, syncable::Directory::Metahandles>::iterator it =
to_delete.begin(); it != to_delete.end(); ++it) {
ModelSafeGroup group = routing_info.find(it->first)->second;
CHECK(workers_.find(group) != workers_.end());
workers_[group]->DoWorkAndWaitUntilDone(
base::Bind(&SyncRollbackManager::DeleteOnWorkerThread,
base::Unretained(this),
it->first, it->second));
}
NotifyRollbackDone();
}
SyncerError SyncRollbackManager::DeleteOnWorkerThread(
ModelType type, std::vector<int64> handles) {
CHECK(change_delegate_);
{
ChangeRecordList deletes;
WriteTransaction trans(FROM_HERE, GetUserShare());
for (size_t i = 0; i < handles.size(); ++i) {
syncable::MutableEntry e(trans.GetWrappedWriteTrans(),
syncable::GET_BY_HANDLE, handles[i]);
if (!e.good() || e.GetIsDel())
continue;
ChangeRecord del;
del.action = ChangeRecord::ACTION_DELETE;
del.id = handles[i];
del.specifics = e.GetSpecifics();
deletes.push_back(del);
}
change_delegate_->OnChangesApplied(type, 1, &trans,
MakeImmutable(&deletes));
}
change_delegate_->OnChangesComplete(type);
return SYNCER_OK;
}
void SyncRollbackManager::NotifyRollbackDone() {
SyncProtocolError error;
error.action = ROLLBACK_DONE;
FOR_EACH_OBSERVER(SyncManager::Observer, *GetObservers(),
OnActionableError(error));
}
} // namespace syncer
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