rocksdb/utilities/transactions/optimistic_transaction_db_impl.cc
agiardullo 2200295ee1 optimistic transactions support for reinitialization
Summary: Extend optimization in D53835 to optimistic transactions for completeness.

Test Plan: added test

Reviewers: sdong, IslamAbdelRahman, horuff, jkedgar

Reviewed By: horuff

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D55059
2016-03-07 19:03:09 -08:00

92 lines
3 KiB
C++

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifndef ROCKSDB_LITE
#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_impl.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 OptimisticTransactionImpl(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;
column_families.push_back(
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<OptimisticTransactionImpl*>(txn) != nullptr);
auto txn_impl = reinterpret_cast<OptimisticTransactionImpl*>(txn);
txn_impl->Reinitialize(this, write_options, txn_options);
}
} // namespace rocksdb
#endif // ROCKSDB_LITE