forked from blevesearch/bleve
-
Notifications
You must be signed in to change notification settings - Fork 0
/
index_impl.go
915 lines (779 loc) · 20.8 KB
/
index_impl.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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
// Copyright (c) 2014 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bleve
import (
"context"
"encoding/json"
"fmt"
"os"
"sort"
"sync"
"sync/atomic"
"time"
"github.com/blevesearch/bleve/document"
"github.com/blevesearch/bleve/index"
"github.com/blevesearch/bleve/index/store"
"github.com/blevesearch/bleve/index/upsidedown"
"github.com/blevesearch/bleve/mapping"
"github.com/blevesearch/bleve/registry"
"github.com/blevesearch/bleve/search"
"github.com/blevesearch/bleve/search/collector"
"github.com/blevesearch/bleve/search/facet"
"github.com/blevesearch/bleve/search/highlight"
)
type indexImpl struct {
path string
name string
meta *indexMeta
i index.Index
m mapping.IndexMapping
mutex sync.RWMutex
open bool
stats *IndexStat
}
const storePath = "store"
var mappingInternalKey = []byte("_mapping")
const SearchQueryStartCallbackKey = "_search_query_start_callback_key"
const SearchQueryEndCallbackKey = "_search_query_end_callback_key"
type SearchQueryStartCallbackFn func(size uint64) error
type SearchQueryEndCallbackFn func(size uint64) error
func indexStorePath(path string) string {
return path + string(os.PathSeparator) + storePath
}
func newIndexUsing(path string, mapping mapping.IndexMapping, indexType string, kvstore string, kvconfig map[string]interface{}) (*indexImpl, error) {
// first validate the mapping
err := mapping.Validate()
if err != nil {
return nil, err
}
if kvconfig == nil {
kvconfig = map[string]interface{}{}
}
if kvstore == "" {
return nil, fmt.Errorf("bleve not configured for file based indexing")
}
rv := indexImpl{
path: path,
name: path,
m: mapping,
meta: newIndexMeta(indexType, kvstore, kvconfig),
}
rv.stats = &IndexStat{i: &rv}
// at this point there is hope that we can be successful, so save index meta
if path != "" {
err = rv.meta.Save(path)
if err != nil {
return nil, err
}
kvconfig["create_if_missing"] = true
kvconfig["error_if_exists"] = true
kvconfig["path"] = indexStorePath(path)
} else {
kvconfig["path"] = ""
}
// open the index
indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
if indexTypeConstructor == nil {
return nil, ErrorUnknownIndexType
}
rv.i, err = indexTypeConstructor(rv.meta.Storage, kvconfig, Config.analysisQueue)
if err != nil {
return nil, err
}
err = rv.i.Open()
if err != nil {
if err == index.ErrorUnknownStorageType {
return nil, ErrorUnknownStorageType
}
return nil, err
}
// now persist the mapping
mappingBytes, err := json.Marshal(mapping)
if err != nil {
return nil, err
}
err = rv.i.SetInternal(mappingInternalKey, mappingBytes)
if err != nil {
return nil, err
}
// mark the index as open
rv.mutex.Lock()
defer rv.mutex.Unlock()
rv.open = true
indexStats.Register(&rv)
return &rv, nil
}
func openIndexUsing(path string, runtimeConfig map[string]interface{}) (rv *indexImpl, err error) {
rv = &indexImpl{
path: path,
name: path,
}
rv.stats = &IndexStat{i: rv}
rv.meta, err = openIndexMeta(path)
if err != nil {
return nil, err
}
// backwards compatibility if index type is missing
if rv.meta.IndexType == "" {
rv.meta.IndexType = upsidedown.Name
}
storeConfig := rv.meta.Config
if storeConfig == nil {
storeConfig = map[string]interface{}{}
}
storeConfig["path"] = indexStorePath(path)
storeConfig["create_if_missing"] = false
storeConfig["error_if_exists"] = false
for rck, rcv := range runtimeConfig {
storeConfig[rck] = rcv
}
// open the index
indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
if indexTypeConstructor == nil {
return nil, ErrorUnknownIndexType
}
rv.i, err = indexTypeConstructor(rv.meta.Storage, storeConfig, Config.analysisQueue)
if err != nil {
return nil, err
}
err = rv.i.Open()
if err != nil {
if err == index.ErrorUnknownStorageType {
return nil, ErrorUnknownStorageType
}
return nil, err
}
// now load the mapping
indexReader, err := rv.i.Reader()
if err != nil {
return nil, err
}
defer func() {
if cerr := indexReader.Close(); cerr != nil && err == nil {
err = cerr
}
}()
mappingBytes, err := indexReader.GetInternal(mappingInternalKey)
if err != nil {
return nil, err
}
var im *mapping.IndexMappingImpl
err = json.Unmarshal(mappingBytes, &im)
if err != nil {
return nil, fmt.Errorf("error parsing mapping JSON: %v\nmapping contents:\n%s", err, string(mappingBytes))
}
// mark the index as open
rv.mutex.Lock()
defer rv.mutex.Unlock()
rv.open = true
// validate the mapping
err = im.Validate()
if err != nil {
// note even if the mapping is invalid
// we still return an open usable index
return rv, err
}
rv.m = im
indexStats.Register(rv)
return rv, err
}
// Advanced returns implementation internals
// necessary ONLY for advanced usage.
func (i *indexImpl) Advanced() (index.Index, store.KVStore, error) {
s, err := i.i.Advanced()
if err != nil {
return nil, nil, err
}
return i.i, s, nil
}
// Mapping returns the IndexMapping in use by this
// Index.
func (i *indexImpl) Mapping() mapping.IndexMapping {
return i.m
}
// Index the object with the specified identifier.
// The IndexMapping for this index will determine
// how the object is indexed.
func (i *indexImpl) Index(id string, data interface{}) (err error) {
if id == "" {
return ErrorEmptyID
}
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return ErrorIndexClosed
}
doc := document.NewDocument(id)
err = i.m.MapDocument(doc, data)
if err != nil {
return
}
err = i.i.Update(doc)
return
}
// IndexAdvanced takes a document.Document object
// skips the mapping and indexes it.
func (i *indexImpl) IndexAdvanced(doc *document.Document) (err error) {
if doc.ID == "" {
return ErrorEmptyID
}
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return ErrorIndexClosed
}
err = i.i.Update(doc)
return
}
// Delete entries for the specified identifier from
// the index.
func (i *indexImpl) Delete(id string) (err error) {
if id == "" {
return ErrorEmptyID
}
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return ErrorIndexClosed
}
err = i.i.Delete(id)
return
}
// Batch executes multiple Index and Delete
// operations at the same time. There are often
// significant performance benefits when performing
// operations in a batch.
func (i *indexImpl) Batch(b *Batch) error {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return ErrorIndexClosed
}
return i.i.Batch(b.internal)
}
// Document is used to find the values of all the
// stored fields for a document in the index. These
// stored fields are put back into a Document object
// and returned.
func (i *indexImpl) Document(id string) (doc *document.Document, err error) {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return nil, ErrorIndexClosed
}
indexReader, err := i.i.Reader()
if err != nil {
return nil, err
}
defer func() {
if cerr := indexReader.Close(); err == nil && cerr != nil {
err = cerr
}
}()
doc, err = indexReader.Document(id)
if err != nil {
return nil, err
}
return doc, nil
}
// DocCount returns the number of documents in the
// index.
func (i *indexImpl) DocCount() (count uint64, err error) {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return 0, ErrorIndexClosed
}
// open a reader for this search
indexReader, err := i.i.Reader()
if err != nil {
return 0, fmt.Errorf("error opening index reader %v", err)
}
defer func() {
if cerr := indexReader.Close(); err == nil && cerr != nil {
err = cerr
}
}()
count, err = indexReader.DocCount()
return
}
// Search executes a search request operation.
// Returns a SearchResult object or an error.
func (i *indexImpl) Search(req *SearchRequest) (sr *SearchResult, err error) {
return i.SearchInContext(context.Background(), req)
}
var documentMatchEmptySize int
var searchContextEmptySize int
var facetResultEmptySize int
var documentEmptySize int
func init() {
var dm search.DocumentMatch
documentMatchEmptySize = dm.Size()
var sc search.SearchContext
searchContextEmptySize = sc.Size()
var fr search.FacetResult
facetResultEmptySize = fr.Size()
var d document.Document
documentEmptySize = d.Size()
}
// memNeededForSearch is a helper function that returns an estimate of RAM
// needed to execute a search request.
func memNeededForSearch(req *SearchRequest,
searcher search.Searcher,
topnCollector *collector.TopNCollector) uint64 {
backingSize := req.Size + req.From + 1
if req.Size+req.From > collector.PreAllocSizeSkipCap {
backingSize = collector.PreAllocSizeSkipCap + 1
}
numDocMatches := backingSize + searcher.DocumentMatchPoolSize()
estimate := 0
// overhead, size in bytes from collector
estimate += topnCollector.Size()
// pre-allocing DocumentMatchPool
estimate += searchContextEmptySize + numDocMatches*documentMatchEmptySize
// searcher overhead
estimate += searcher.Size()
// overhead from results, lowestMatchOutsideResults
estimate += (numDocMatches + 1) * documentMatchEmptySize
// additional overhead from SearchResult
estimate += reflectStaticSizeSearchResult + reflectStaticSizeSearchStatus
// overhead from facet results
if req.Facets != nil {
estimate += len(req.Facets) * facetResultEmptySize
}
// highlighting, store
if len(req.Fields) > 0 || req.Highlight != nil {
// Size + From => number of hits
estimate += (req.Size + req.From) * documentEmptySize
}
return uint64(estimate)
}
// SearchInContext executes a search request operation within the provided
// Context. Returns a SearchResult object or an error.
func (i *indexImpl) SearchInContext(ctx context.Context, req *SearchRequest) (sr *SearchResult, err error) {
i.mutex.RLock()
defer i.mutex.RUnlock()
searchStart := time.Now()
if !i.open {
return nil, ErrorIndexClosed
}
var reverseQueryExecution bool
if req.SearchBefore != nil {
reverseQueryExecution = true
req.Sort.Reverse()
req.SearchAfter = req.SearchBefore
req.SearchBefore = nil
}
var coll *collector.TopNCollector
if req.SearchAfter != nil {
coll = collector.NewTopNCollectorAfter(req.Size, req.Sort, req.SearchAfter)
} else {
coll = collector.NewTopNCollector(req.Size, req.From, req.Sort)
}
// open a reader for this search
indexReader, err := i.i.Reader()
if err != nil {
return nil, fmt.Errorf("error opening index reader %v", err)
}
defer func() {
if cerr := indexReader.Close(); err == nil && cerr != nil {
err = cerr
}
}()
searcher, err := req.Query.Searcher(indexReader, i.m, search.SearcherOptions{
Explain: req.Explain,
IncludeTermVectors: req.IncludeLocations || req.Highlight != nil,
Score: req.Score,
})
if err != nil {
return nil, err
}
defer func() {
if serr := searcher.Close(); err == nil && serr != nil {
err = serr
}
}()
if req.Facets != nil {
facetsBuilder := search.NewFacetsBuilder(indexReader)
for facetName, facetRequest := range req.Facets {
if facetRequest.NumericRanges != nil {
// build numeric range facet
facetBuilder := facet.NewNumericFacetBuilder(facetRequest.Field, facetRequest.Size)
for _, nr := range facetRequest.NumericRanges {
facetBuilder.AddRange(nr.Name, nr.Min, nr.Max)
}
facetsBuilder.Add(facetName, facetBuilder)
} else if facetRequest.DateTimeRanges != nil {
// build date range facet
facetBuilder := facet.NewDateTimeFacetBuilder(facetRequest.Field, facetRequest.Size)
dateTimeParser := i.m.DateTimeParserNamed("")
for _, dr := range facetRequest.DateTimeRanges {
start, end := dr.ParseDates(dateTimeParser)
facetBuilder.AddRange(dr.Name, start, end)
}
facetsBuilder.Add(facetName, facetBuilder)
} else {
// build terms facet
facetBuilder := facet.NewTermsFacetBuilder(facetRequest.Field, facetRequest.Size)
facetsBuilder.Add(facetName, facetBuilder)
}
}
coll.SetFacetsBuilder(facetsBuilder)
}
memNeeded := memNeededForSearch(req, searcher, coll)
if cb := ctx.Value(SearchQueryStartCallbackKey); cb != nil {
if cbF, ok := cb.(SearchQueryStartCallbackFn); ok {
err = cbF(memNeeded)
}
}
if err != nil {
return nil, err
}
if cb := ctx.Value(SearchQueryEndCallbackKey); cb != nil {
if cbF, ok := cb.(SearchQueryEndCallbackFn); ok {
defer func() {
_ = cbF(memNeeded)
}()
}
}
err = coll.Collect(ctx, searcher, indexReader)
if err != nil {
return nil, err
}
hits := coll.Results()
var highlighter highlight.Highlighter
if req.Highlight != nil {
// get the right highlighter
highlighter, err = Config.Cache.HighlighterNamed(Config.DefaultHighlighter)
if err != nil {
return nil, err
}
if req.Highlight.Style != nil {
highlighter, err = Config.Cache.HighlighterNamed(*req.Highlight.Style)
if err != nil {
return nil, err
}
}
if highlighter == nil {
return nil, fmt.Errorf("no highlighter named `%s` registered", *req.Highlight.Style)
}
}
for _, hit := range hits {
if i.name != "" {
hit.Index = i.name
}
err = LoadAndHighlightFields(hit, req, i.name, indexReader, highlighter)
if err != nil {
return nil, err
}
}
atomic.AddUint64(&i.stats.searches, 1)
searchDuration := time.Since(searchStart)
atomic.AddUint64(&i.stats.searchTime, uint64(searchDuration))
if Config.SlowSearchLogThreshold > 0 &&
searchDuration > Config.SlowSearchLogThreshold {
logger.Printf("slow search took %s - %v", searchDuration, req)
}
if reverseQueryExecution {
// reverse the sort back to the original
req.Sort.Reverse()
// resort using the original order
mhs := newSearchHitSorter(req.Sort, hits)
sort.Sort(mhs)
// reset request
req.SearchBefore = req.SearchAfter
req.SearchAfter = nil
}
return &SearchResult{
Status: &SearchStatus{
Total: 1,
Successful: 1,
},
Request: req,
Hits: hits,
Total: coll.Total(),
MaxScore: coll.MaxScore(),
Took: searchDuration,
Facets: coll.FacetResults(),
}, nil
}
func LoadAndHighlightFields(hit *search.DocumentMatch, req *SearchRequest,
indexName string, r index.IndexReader,
highlighter highlight.Highlighter) error {
if len(req.Fields) > 0 || highlighter != nil {
doc, err := r.Document(hit.ID)
if err == nil && doc != nil {
if len(req.Fields) > 0 {
fieldsToLoad := deDuplicate(req.Fields)
for _, f := range fieldsToLoad {
for _, docF := range doc.Fields {
if f == "*" || docF.Name() == f {
var value interface{}
switch docF := docF.(type) {
case *document.TextField:
value = string(docF.Value())
case *document.NumericField:
num, err := docF.Number()
if err == nil {
value = num
}
case *document.DateTimeField:
datetime, err := docF.DateTime()
if err == nil {
value = datetime.Format(time.RFC3339)
}
case *document.BooleanField:
boolean, err := docF.Boolean()
if err == nil {
value = boolean
}
case *document.GeoPointField:
lon, err := docF.Lon()
if err == nil {
lat, err := docF.Lat()
if err == nil {
value = []float64{lon, lat}
}
}
}
if value != nil {
hit.AddFieldValue(docF.Name(), value)
}
}
}
}
}
if highlighter != nil {
highlightFields := req.Highlight.Fields
if highlightFields == nil {
// add all fields with matches
highlightFields = make([]string, 0, len(hit.Locations))
for k := range hit.Locations {
highlightFields = append(highlightFields, k)
}
}
for _, hf := range highlightFields {
highlighter.BestFragmentsInField(hit, doc, hf, 1)
}
}
} else if doc == nil {
// unexpected case, a doc ID that was found as a search hit
// was unable to be found during document lookup
return ErrorIndexReadInconsistency
}
}
return nil
}
// Fields returns the name of all the fields this
// Index has operated on.
func (i *indexImpl) Fields() (fields []string, err error) {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return nil, ErrorIndexClosed
}
indexReader, err := i.i.Reader()
if err != nil {
return nil, err
}
defer func() {
if cerr := indexReader.Close(); err == nil && cerr != nil {
err = cerr
}
}()
fields, err = indexReader.Fields()
if err != nil {
return nil, err
}
return fields, nil
}
func (i *indexImpl) FieldDict(field string) (index.FieldDict, error) {
i.mutex.RLock()
if !i.open {
i.mutex.RUnlock()
return nil, ErrorIndexClosed
}
indexReader, err := i.i.Reader()
if err != nil {
i.mutex.RUnlock()
return nil, err
}
fieldDict, err := indexReader.FieldDict(field)
if err != nil {
i.mutex.RUnlock()
return nil, err
}
return &indexImplFieldDict{
index: i,
indexReader: indexReader,
fieldDict: fieldDict,
}, nil
}
func (i *indexImpl) FieldDictRange(field string, startTerm []byte, endTerm []byte) (index.FieldDict, error) {
i.mutex.RLock()
if !i.open {
i.mutex.RUnlock()
return nil, ErrorIndexClosed
}
indexReader, err := i.i.Reader()
if err != nil {
i.mutex.RUnlock()
return nil, err
}
fieldDict, err := indexReader.FieldDictRange(field, startTerm, endTerm)
if err != nil {
i.mutex.RUnlock()
return nil, err
}
return &indexImplFieldDict{
index: i,
indexReader: indexReader,
fieldDict: fieldDict,
}, nil
}
func (i *indexImpl) FieldDictPrefix(field string, termPrefix []byte) (index.FieldDict, error) {
i.mutex.RLock()
if !i.open {
i.mutex.RUnlock()
return nil, ErrorIndexClosed
}
indexReader, err := i.i.Reader()
if err != nil {
i.mutex.RUnlock()
return nil, err
}
fieldDict, err := indexReader.FieldDictPrefix(field, termPrefix)
if err != nil {
i.mutex.RUnlock()
return nil, err
}
return &indexImplFieldDict{
index: i,
indexReader: indexReader,
fieldDict: fieldDict,
}, nil
}
func (i *indexImpl) Close() error {
i.mutex.Lock()
defer i.mutex.Unlock()
indexStats.UnRegister(i)
i.open = false
return i.i.Close()
}
func (i *indexImpl) Stats() *IndexStat {
return i.stats
}
func (i *indexImpl) StatsMap() map[string]interface{} {
return i.stats.statsMap()
}
func (i *indexImpl) GetInternal(key []byte) (val []byte, err error) {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return nil, ErrorIndexClosed
}
reader, err := i.i.Reader()
if err != nil {
return nil, err
}
defer func() {
if cerr := reader.Close(); err == nil && cerr != nil {
err = cerr
}
}()
val, err = reader.GetInternal(key)
if err != nil {
return nil, err
}
return val, nil
}
func (i *indexImpl) SetInternal(key, val []byte) error {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return ErrorIndexClosed
}
return i.i.SetInternal(key, val)
}
func (i *indexImpl) DeleteInternal(key []byte) error {
i.mutex.RLock()
defer i.mutex.RUnlock()
if !i.open {
return ErrorIndexClosed
}
return i.i.DeleteInternal(key)
}
// NewBatch creates a new empty batch.
func (i *indexImpl) NewBatch() *Batch {
return &Batch{
index: i,
internal: index.NewBatch(),
}
}
func (i *indexImpl) Name() string {
return i.name
}
func (i *indexImpl) SetName(name string) {
indexStats.UnRegister(i)
i.name = name
indexStats.Register(i)
}
type indexImplFieldDict struct {
index *indexImpl
indexReader index.IndexReader
fieldDict index.FieldDict
}
func (f *indexImplFieldDict) Next() (*index.DictEntry, error) {
return f.fieldDict.Next()
}
func (f *indexImplFieldDict) Close() error {
defer f.index.mutex.RUnlock()
err := f.fieldDict.Close()
if err != nil {
return err
}
return f.indexReader.Close()
}
// helper function to remove duplicate entries from slice of strings
func deDuplicate(fields []string) []string {
entries := make(map[string]struct{})
ret := []string{}
for _, entry := range fields {
if _, exists := entries[entry]; !exists {
entries[entry] = struct{}{}
ret = append(ret, entry)
}
}
return ret
}
type searchHitSorter struct {
hits search.DocumentMatchCollection
sort search.SortOrder
cachedScoring []bool
cachedDesc []bool
}
func newSearchHitSorter(sort search.SortOrder, hits search.DocumentMatchCollection) *searchHitSorter {
return &searchHitSorter{
sort: sort,
hits: hits,
cachedScoring: sort.CacheIsScore(),
cachedDesc: sort.CacheDescending(),
}
}
func (m *searchHitSorter) Len() int { return len(m.hits) }
func (m *searchHitSorter) Swap(i, j int) { m.hits[i], m.hits[j] = m.hits[j], m.hits[i] }
func (m *searchHitSorter) Less(i, j int) bool {
c := m.sort.Compare(m.cachedScoring, m.cachedDesc, m.hits[i], m.hits[j])
return c < 0
}