/Users/deen/code/yugabyte-db/src/yb/rocksdb/utilities/merge_operators.h
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1 | | // Copyright (c) 2011-present, Facebook, Inc. All rights reserved. |
2 | | // This source code is licensed under the BSD-style license found in the |
3 | | // LICENSE file in the root directory of this source tree. An additional grant |
4 | | // of patent rights can be found in the PATENTS file in the same directory. |
5 | | // |
6 | | // The following only applies to changes made to this file as part of YugaByte development. |
7 | | // |
8 | | // Portions Copyright (c) YugaByte, Inc. |
9 | | // |
10 | | // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except |
11 | | // in compliance with the License. You may obtain a copy of the License at |
12 | | // |
13 | | // http://www.apache.org/licenses/LICENSE-2.0 |
14 | | // |
15 | | // Unless required by applicable law or agreed to in writing, software distributed under the License |
16 | | // is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
17 | | // or implied. See the License for the specific language governing permissions and limitations |
18 | | // under the License. |
19 | | // |
20 | | #ifndef MERGE_OPERATORS_H |
21 | | #define MERGE_OPERATORS_H |
22 | | |
23 | | #include <memory> |
24 | | #include <stdio.h> |
25 | | |
26 | | #include "yb/rocksdb/merge_operator.h" |
27 | | |
28 | | namespace rocksdb { |
29 | | |
30 | | class MergeOperators { |
31 | | public: |
32 | | static std::shared_ptr<MergeOperator> CreatePutOperator(); |
33 | | static std::shared_ptr<MergeOperator> CreateUInt64AddOperator(); |
34 | | static std::shared_ptr<MergeOperator> CreateStringAppendOperator(); |
35 | | static std::shared_ptr<MergeOperator> CreateStringAppendTESTOperator(); |
36 | | |
37 | | // Will return a different merge operator depending on the string. |
38 | | // TODO: Hook the "name" up to the actual Name() of the MergeOperators? |
39 | | static std::shared_ptr<MergeOperator> CreateFromStringId( |
40 | 55 | const std::string& name) { |
41 | 55 | if (name == "put") { |
42 | 0 | return CreatePutOperator(); |
43 | 55 | } else if ( name == "uint64add") { |
44 | 0 | return CreateUInt64AddOperator(); |
45 | 55 | } else if (name == "stringappend") { |
46 | 55 | return CreateStringAppendOperator(); |
47 | 0 | } else if (name == "stringappendtest") { |
48 | 0 | return CreateStringAppendTESTOperator(); |
49 | 0 | } else { |
50 | | // Empty or unknown, just return nullptr |
51 | 0 | return nullptr; |
52 | 0 | } |
53 | 55 | } |
54 | | |
55 | | }; |
56 | | |
57 | | } // namespace rocksdb |
58 | | |
59 | | #endif |