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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "utilities/transactions/optimistic_transaction_db_impl.h"
#include <string>
#include <vector>
#include "db/db_impl.h"
#include "rocksdb/db.h"
#include "rocksdb/options.h"
#include "rocksdb/utilities/optimistic_transaction_db.h"
#include "utilities/transactions/optimistic_transaction.h"
namespace rocksdb {
Transaction* OptimisticTransactionDBImpl::BeginTransaction(
const WriteOptions& write_options,
const OptimisticTransactionOptions& txn_options, Transaction* old_txn) {
if (old_txn != nullptr) {
ReinitializeTransaction(old_txn, write_options, txn_options);
return old_txn;
} else {
return new OptimisticTransaction(this, write_options, txn_options);
Status OptimisticTransactionDB::Open(const Options& options,
const std::string& dbname,
OptimisticTransactionDB** dbptr) {
DBOptions db_options(options);
ColumnFamilyOptions cf_options(options);
std::vector<ColumnFamilyDescriptor> column_families;
ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
std::vector<ColumnFamilyHandle*> handles;
Status s = Open(db_options, dbname, column_families, &handles, dbptr);
if (s.ok()) {
assert(handles.size() == 1);
// i can delete the handle since DBImpl is always holding a reference to
// default column family
delete handles[0];
return s;
Status OptimisticTransactionDB::Open(
const DBOptions& db_options, const std::string& dbname,
const std::vector<ColumnFamilyDescriptor>& column_families,
std::vector<ColumnFamilyHandle*>* handles,
OptimisticTransactionDB** dbptr) {
Status s;
DB* db;
std::vector<ColumnFamilyDescriptor> column_families_copy = column_families;
// Enable MemTable History if not already enabled
for (auto& column_family : column_families_copy) {
ColumnFamilyOptions* options = &column_family.options;
if (options->max_write_buffer_number_to_maintain == 0) {
// Setting to -1 will set the History size to max_write_buffer_number.
options->max_write_buffer_number_to_maintain = -1;
s = DB::Open(db_options, dbname, column_families_copy, handles, &db);
if (s.ok()) {
*dbptr = new OptimisticTransactionDBImpl(db);
return s;
void OptimisticTransactionDBImpl::ReinitializeTransaction(
Transaction* txn, const WriteOptions& write_options,
const OptimisticTransactionOptions& txn_options) {
assert(dynamic_cast<OptimisticTransaction*>(txn) != nullptr);
auto txn_impl = reinterpret_cast<OptimisticTransaction*>(txn);
txn_impl->Reinitialize(this, write_options, txn_options);
} // namespace rocksdb
#endif // ROCKSDB_LITE