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 guonix |
17 | * \date Nov 2020 |
18 | * \brief |
19 | */ |
20 | |
21 | #pragma once |
22 | |
23 | #include "executor/bthread_task.h" |
24 | #include "context.h" |
25 | |
26 | namespace proxima { |
27 | namespace be { |
28 | namespace query { |
29 | |
30 | //! Predefine class |
31 | class KNNTask; |
32 | |
33 | // Alias knn task pointer |
34 | using KNNTaskPtr = std::shared_ptr<KNNTask>; |
35 | using KNNTaskPtrList = std::list<KNNTaskPtr>; |
36 | |
37 | |
38 | /*! |
39 | * KNNTask |
40 | */ |
41 | class KNNTask : public BthreadTask { |
42 | public: |
43 | //! Constructor |
44 | KNNTask(index::SegmentPtr segment, KNNQueryContext *context); |
45 | |
46 | //! Constructor |
47 | KNNTask(const std::string &name, index::SegmentPtr segment, |
48 | KNNQueryContext *context); |
49 | |
50 | //! Destructor |
51 | ~KNNTask() override; |
52 | |
53 | public: |
54 | //! Retrieve result of knn_search |
55 | const std::vector<index::QueryResultList> &result() const; |
56 | |
57 | private: |
58 | //! Run search task |
59 | int do_run() override; |
60 | |
61 | private: |
62 | //! Segment handle |
63 | index::SegmentPtr segment_{nullptr}; |
64 | |
65 | //! KnnQueryContext handler |
66 | KNNQueryContext *context_{nullptr}; |
67 | |
68 | //! Query Result, corresponding to the field of proto::QueryResponse |
69 | std::vector<index::QueryResultList> result_{}; |
70 | }; |
71 | |
72 | |
73 | } // namespace query |
74 | } // namespace be |
75 | } // namespace proxima |
76 | |