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 Haichao.chc |
17 | * \date Oct 2020 |
18 | * \brief Provides ability for management of persist segments |
19 | */ |
20 | |
21 | #pragma once |
22 | |
23 | #include "common/macro_define.h" |
24 | #include "persist_segment.h" |
25 | #include "../concurrent_hash_map.h" |
26 | |
27 | namespace proxima { |
28 | namespace be { |
29 | namespace index { |
30 | |
31 | class PersistSegmentManager; |
32 | using PersistSegmentManagerPtr = std::shared_ptr<PersistSegmentManager>; |
33 | |
34 | /* |
35 | * PersistSegmentManager is mainly for managing persist segments. |
36 | */ |
37 | class PersistSegmentManager { |
38 | public: |
39 | //! Constructor |
40 | PersistSegmentManager(const std::string &coll_name, |
41 | const std::string &coll_path) |
42 | : collection_name_(coll_name), collection_path_(coll_path) {} |
43 | |
44 | //! Destructor |
45 | ~PersistSegmentManager(); |
46 | |
47 | //! Create an instance |
48 | static PersistSegmentManagerPtr Create(const std::string &collection_name, |
49 | const std::string &collection_path); |
50 | |
51 | public: |
52 | //! Add persist segment |
53 | void add_segment(PersistSegmentPtr persist_segment); |
54 | |
55 | //! Get a specific segment |
56 | const PersistSegmentPtr &get_segment(SegmentID segment_id); |
57 | |
58 | //! Get latest put-in segment |
59 | const PersistSegmentPtr &get_latest_segment(); |
60 | |
61 | //! Upload all segments |
62 | int unload_segments(); |
63 | |
64 | //! Return whether has some segment |
65 | bool has_segment(SegmentID segment_id) { |
66 | return segments_.has(segment_id); |
67 | } |
68 | |
69 | //! Return loaded persist segment count |
70 | size_t segment_count() { |
71 | return segments_.size(); |
72 | } |
73 | |
74 | private: |
75 | std::string collection_name_{}; |
76 | std::string collection_path_{}; |
77 | |
78 | ConcurrentHashMap<SegmentID, PersistSegmentPtr> segments_{}; |
79 | }; |
80 | |
81 | |
82 | } // end namespace index |
83 | } // namespace be |
84 | } // end namespace proxima |
85 | |