-
Notifications
You must be signed in to change notification settings - Fork 451
/
multi_fetch_tags_result.go
126 lines (107 loc) · 3.25 KB
/
multi_fetch_tags_result.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package consolidators
import (
"sync"
"github.com/m3db/m3/src/dbnode/client"
"github.com/m3db/m3/src/query/block"
xerrors "github.com/m3db/m3/src/x/errors"
)
const initSize = 10
type multiSearchResult struct {
sync.Mutex
meta block.ResultMetadata
err xerrors.MultiError
seenIters []client.TaggedIDsIterator // track known iterators to avoid leaking
dedupeMap map[string]MultiTagResult
}
// NewMultiFetchTagsResult builds a new multi fetch tags result.
func NewMultiFetchTagsResult() MultiFetchTagsResult {
return &multiSearchResult{
dedupeMap: make(map[string]MultiTagResult, initSize),
meta: block.NewResultMetadata(),
}
}
func (r *multiSearchResult) Close() error {
r.Lock()
defer r.Unlock()
for _, iters := range r.seenIters {
iters.Finalize()
}
r.seenIters = nil
r.dedupeMap = nil
r.err = xerrors.NewMultiError()
return nil
}
func (r *multiSearchResult) FinalResult() (TagResult, error) {
r.Lock()
defer r.Unlock()
err := r.err.FinalError()
if err != nil {
return TagResult{Metadata: r.meta}, err
}
result := make([]MultiTagResult, 0, len(r.dedupeMap))
for _, it := range r.dedupeMap {
result = append(result, it)
}
return TagResult{
Tags: result,
Metadata: r.meta,
}, nil
}
func (r *multiSearchResult) Add(
newIterator client.TaggedIDsIterator,
meta block.ResultMetadata,
err error,
) {
r.Lock()
defer r.Unlock()
if err != nil {
r.err = r.err.Add(err)
return
}
if r.seenIters == nil {
r.seenIters = make([]client.TaggedIDsIterator, 0, initSize)
r.meta = meta
} else {
r.meta = r.meta.CombineMetadata(meta)
}
r.seenIters = append(r.seenIters, newIterator)
// Need to check the error to bail early after accumulating the iterators
// otherwise when we close the the multi fetch result
if !r.err.Empty() {
// don't need to do anything if the final result is going to be an error
return
}
for newIterator.Next() {
_, ident, tagIter := newIterator.Current()
id := ident.String()
_, exists := r.dedupeMap[id]
if !exists {
r.dedupeMap[id] = MultiTagResult{
ID: ident,
Iter: tagIter.Duplicate(),
}
}
}
if err := newIterator.Err(); err != nil {
r.err = r.err.Add(err)
}
}