1 | /** |
2 | * Copyright 2021 Alibaba, Inc. and its affiliates. All Rights Reserved. |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | |
16 | * \author Dianzhang.Chen |
17 | * \date Feb 2021 |
18 | * \brief Columns order interface definition for proxima search engine |
19 | */ |
20 | |
21 | #pragma once |
22 | |
23 | #include <map> |
24 | #include <mutex> |
25 | #include "meta/meta.h" |
26 | |
27 | namespace proxima { |
28 | namespace be { |
29 | namespace agent { |
30 | |
31 | class ColumnOrder; |
32 | class ColumnOrderMap; |
33 | |
34 | using ColumnOrderPtr = std::shared_ptr<ColumnOrder>; |
35 | using ColumnOrderMapPtr = std::shared_ptr<ColumnOrderMap>; |
36 | |
37 | /*! Columns order |
38 | */ |
39 | class ColumnOrder { |
40 | public: |
41 | //! Constructor |
42 | ColumnOrder() = default; |
43 | |
44 | //! Destructor |
45 | ~ColumnOrder() = default; |
46 | |
47 | //! Init columns order |
48 | void init_column_order(const meta::CollectionMeta &meta); |
49 | |
50 | //! Get forward order |
51 | const std::map<std::string, size_t> &get_forward_order() const { |
52 | return forward_order_; |
53 | } |
54 | |
55 | //! Get index order |
56 | const std::map<std::string, size_t> &get_index_order() const { |
57 | return index_order_; |
58 | } |
59 | |
60 | protected: |
61 | //! Init columns order |
62 | void init_column_order_impl(const meta::CollectionMeta &meta); |
63 | |
64 | private: |
65 | std::map<std::string, size_t> forward_order_; |
66 | std::map<std::string, size_t> index_order_; |
67 | }; |
68 | |
69 | /*! Columns order Map |
70 | */ |
71 | class ColumnOrderMap { |
72 | public: |
73 | //! Constructor |
74 | ColumnOrderMap() = default; |
75 | |
76 | //! Destructor |
77 | ~ColumnOrderMap() = default; |
78 | |
79 | //! Add columns order |
80 | void add_column_order(const meta::CollectionMeta &meta); |
81 | |
82 | //! Update columns order |
83 | void update_column_order(const meta::CollectionMeta &meta); |
84 | |
85 | //! Remove columns order |
86 | void remove_column_order(const std::string &name); |
87 | |
88 | //! Get collection columns order |
89 | ColumnOrderPtr get_column_order(const std::string &name); |
90 | |
91 | private: |
92 | //! Mutex |
93 | std::mutex mutex_{}; |
94 | //! Columns order map |
95 | std::map<std::string, ColumnOrderPtr> column_order_map_{}; |
96 | }; |
97 | |
98 | } // end namespace agent |
99 | } // namespace be |
100 | } // end namespace proxima |
101 | |