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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 "sync/syncable/syncable_delete_journal.h"
#include <stddef.h>
#include <stdint.h>
#include "base/stl_util.h"
#include "sync/internal_api/public/base/model_type.h"
namespace syncer {
namespace syncable {
DeleteJournal::DeleteJournal(JournalIndex* initial_journal) {
CHECK(initial_journal);
delete_journals_.swap(*initial_journal);
}
DeleteJournal::~DeleteJournal() {
STLDeleteElements(&delete_journals_);
}
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.
EntryKernel* t = new EntryKernel(entry);
delete_journals_.insert(t);
delete_journals_to_purge_.erase(t->ref(META_HANDLE));
}
} 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)->ref(META_HANDLE));
delete *it;
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 (JournalIndex::const_iterator it = delete_journals_.begin();
it != delete_journals_.end(); ++it) {
if ((*it)->GetServerModelType() == type ||
GetModelTypeFromSpecifics((*it)->ref(SPECIFICS)) == type) {
deleted_entries->insert(*it);
}
}
passive_delete_journal_types_.Put(type);
}
void DeleteJournal::PurgeDeleteJournals(BaseTransaction* trans,
const MetahandleSet& to_purge) {
DCHECK(trans);
JournalIndex::iterator it = delete_journals_.begin();
while (it != delete_journals_.end()) {
int64_t handle = (*it)->ref(META_HANDLE);
if (to_purge.count(handle)) {
delete *it;
delete_journals_.erase(it++);
} else {
++it;
}
}
delete_journals_to_purge_.insert(to_purge.begin(), to_purge.end());
}
void DeleteJournal::TakeSnapshotAndClear(BaseTransaction* trans,
EntryKernelSet* journal_entries,
MetahandleSet* journals_to_purge) {
DCHECK(trans);
// Move passive delete journals to snapshot. Will copy back if snapshot fails
// to save.
JournalIndex::iterator it = delete_journals_.begin();
while (it != delete_journals_.end()) {
if (passive_delete_journal_types_.Has((*it)->GetServerModelType()) ||
passive_delete_journal_types_.Has(GetModelTypeFromSpecifics(
(*it)->ref(SPECIFICS)))) {
journal_entries->insert(*it);
delete_journals_.erase(it++);
} else {
++it;
}
}
*journals_to_purge = delete_journals_to_purge_;
delete_journals_to_purge_.clear();
}
void DeleteJournal::AddJournalBatch(BaseTransaction* trans,
const EntryKernelSet& entries) {
DCHECK(trans);
EntryKernel needle;
for (EntryKernelSet::const_iterator i = entries.begin();
i != entries.end(); ++i) {
needle.put(ID, (*i)->ref(ID));
if (delete_journals_.find(&needle) == delete_journals_.end()) {
delete_journals_.insert(new EntryKernel(**i));
}
delete_journals_to_purge_.erase((*i)->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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