rocksdb/utilities/merge_operators.h
Dhruba Borthakur 9cd221094c Add appropriate LICENSE and Copyright message.
Summary:
Add appropriate LICENSE and Copyright message.

Test Plan:
make check

Reviewers:

CC:

Task ID: #

Blame Rev:
2013-10-16 17:48:41 -07:00

46 lines
1.4 KiB
C++

// Copyright (c) 2013, 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 MERGE_OPERATORS_H
#define MERGE_OPERATORS_H
#include <memory>
#include <stdio.h>
#include "rocksdb/merge_operator.h"
namespace rocksdb {
class MergeOperators {
public:
static std::shared_ptr<MergeOperator> CreatePutOperator();
static std::shared_ptr<MergeOperator> CreateUInt64AddOperator();
static std::shared_ptr<MergeOperator> CreateStringAppendOperator();
static std::shared_ptr<MergeOperator> CreateStringAppendTESTOperator();
// Will return a different merge operator depending on the string.
// TODO: Hook the "name" up to the actual Name() of the MergeOperators?
static std::shared_ptr<MergeOperator> CreateFromStringId(
const std::string& name) {
if (name == "put") {
return CreatePutOperator();
} else if ( name == "uint64add") {
return CreateUInt64AddOperator();
} else if (name == "stringappend") {
return CreateStringAppendOperator();
} else if (name == "stringappendtest") {
return CreateStringAppendTESTOperator();
} else {
// Empty or unknown, just return nullptr
return nullptr;
}
}
};
} // namespace rocksdb
#endif