ceph/src/rocksdb/utilities/merge_operators.h

   1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 //
   6 #pragma once
   7 #include <stdio.h>
   8
   9 #include <memory>
  10 #include <string>
  11
  12 #include "rocksdb/merge_operator.h"
  13
  14 namespace ROCKSDB_NAMESPACE {
  15
  16 class MergeOperators {
  17  public:
  18   static std::shared_ptr<MergeOperator> CreatePutOperator();
  19   static std::shared_ptr<MergeOperator> CreateDeprecatedPutOperator();
  20   static std::shared_ptr<MergeOperator> CreateUInt64AddOperator();
  21   static std::shared_ptr<MergeOperator> CreateStringAppendOperator();
  22   static std::shared_ptr<MergeOperator> CreateStringAppendOperator(
  23       char delim_char);
  24   static std::shared_ptr<MergeOperator> CreateStringAppendOperator(
  25       const std::string& delim);
  26   static std::shared_ptr<MergeOperator> CreateStringAppendTESTOperator();
  27   static std::shared_ptr<MergeOperator> CreateMaxOperator();
  28   static std::shared_ptr<MergeOperator> CreateBytesXOROperator();
  29   static std::shared_ptr<MergeOperator> CreateSortOperator();
  30
  31   // Will return a different merge operator depending on the string.
  32   static std::shared_ptr<MergeOperator> CreateFromStringId(
  33       const std::string& name);
  34 };
  35
  36 }  // namespace ROCKSDB_NAMESPACE