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// Copyright 2013 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 "components/sync/syncable/syncable_delete_journal.h"
#include <stdint.h>
#include <utility>
#include "base/memory/ptr_util.h"
#include "components/sync/base/model_type.h"
namespace syncer {
namespace syncable {
DeleteJournal::DeleteJournal(std::unique_ptr<JournalIndex> initial_journal) {
CHECK(initial_journal);
delete_journals_.swap(*initial_journal);
}
DeleteJournal::~DeleteJournal() {}
size_t DeleteJournal::GetDeleteJournalSize(BaseTransaction* trans) const {
DCHECK(trans);
return delete_journals_.size();
}
void DeleteJournal::UpdateDeleteJournalForServerDelete(
BaseTransaction* trans,
bool was_deleted,
const EntryKernel& entry) {
DCHECK(trans);
// Should be sufficient to check server type only but check for local
// type too because of incomplete test setup.
if (!(IsDeleteJournalEnabled(entry.GetServerModelType()) ||
IsDeleteJournalEnabled(
GetModelTypeFromSpecifics(entry.ref(SPECIFICS))))) {
return;
}
JournalIndex::iterator it = delete_journals_.find(&entry);
if (entry.ref(SERVER_IS_DEL)) {
if (it == delete_journals_.end()) {
// New delete.
std::unique_ptr<EntryKernel> t_ptr = base::MakeUnique<EntryKernel>(entry);
EntryKernel* t = t_ptr.get();
delete_journals_to_purge_.erase(t->ref(META_HANDLE));
delete_journals_[t] = std::move(t_ptr);
}
} else {
// Undelete. This could happen in two cases:
// * An entry was deleted then undeleted, i.e. server delete was
// overwritten because of entry has unsynced data locally.
// * A data type was broken, i.e. encountered unrecoverable error, in last
// sync session and all its entries were duplicated in delete journals.
// On restart, entries are recreated from downloads and recreation calls
// UpdateDeleteJournals() to remove live entries from delete journals,
// thus only deleted entries remain in journals.
if (it != delete_journals_.end()) {
delete_journals_to_purge_.insert((*it).first->ref(META_HANDLE));
delete_journals_.erase(it);
} else if (was_deleted) {
delete_journals_to_purge_.insert(entry.ref(META_HANDLE));
}
}
}
void DeleteJournal::GetDeleteJournals(BaseTransaction* trans,
ModelType type,
EntryKernelSet* deleted_entries) {
DCHECK(trans);
for (auto it = delete_journals_.begin(); it != delete_journals_.end(); ++it) {
if ((*it).first->GetServerModelType() == type ||
GetModelTypeFromSpecifics((*it).first->ref(SPECIFICS)) == type) {
deleted_entries->insert((*it).first);
}
}
passive_delete_journal_types_.Put(type);
}
void DeleteJournal::PurgeDeleteJournals(BaseTransaction* trans,
const MetahandleSet& to_purge) {
DCHECK(trans);
auto it = delete_journals_.begin();
while (it != delete_journals_.end()) {
int64_t handle = (*it).first->ref(META_HANDLE);
if (to_purge.count(handle)) {
delete_journals_.erase(it++);
} else {
++it;
}
}
delete_journals_to_purge_.insert(to_purge.begin(), to_purge.end());
}
void DeleteJournal::TakeSnapshotAndClear(BaseTransaction* trans,
OwnedEntryKernelSet* journal_entries,
MetahandleSet* journals_to_purge) {
DCHECK(trans);
// Move passive delete journals to snapshot. Will copy back if snapshot fails
// to save.
auto it = delete_journals_.begin();
while (it != delete_journals_.end()) {
if (passive_delete_journal_types_.Has((*it).first->GetServerModelType()) ||
passive_delete_journal_types_.Has(
GetModelTypeFromSpecifics((*it).first->ref(SPECIFICS)))) {
journal_entries->insert(std::move((*it).second));
delete_journals_.erase(it++);
} else {
++it;
}
}
*journals_to_purge = delete_journals_to_purge_;
delete_journals_to_purge_.clear();
}
void DeleteJournal::AddJournalBatch(BaseTransaction* trans,
const OwnedEntryKernelSet& entries) {
DCHECK(trans);
EntryKernel needle;
for (auto& entry : entries) {
needle.put(ID, entry->ref(ID));
if (delete_journals_.find(&needle) == delete_journals_.end()) {
std::unique_ptr<EntryKernel> t_ptr =
base::MakeUnique<EntryKernel>(*entry);
EntryKernel* t = t_ptr.get();
delete_journals_[t] = std::move(t_ptr);
}
delete_journals_to_purge_.erase(entry->ref(META_HANDLE));
}
}
/* static */
bool DeleteJournal::IsDeleteJournalEnabled(ModelType type) {
switch (type) {
case BOOKMARKS:
return true;
default:
return false;
}
}
} // namespace syncable
} // namespace syncer
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