mirror of https://github.com/facebook/rocksdb.git
49 lines
1.5 KiB
C++
49 lines
1.5 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 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();
|
|
static std::shared_ptr<MergeOperator> CreateMaxOperator();
|
|
|
|
// 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 if (name == "max") {
|
|
return CreateMaxOperator();
|
|
} else {
|
|
// Empty or unknown, just return nullptr
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
} // namespace rocksdb
|
|
|
|
#endif
|