forked from ghetzel/pivot
-
Notifications
You must be signed in to change notification settings - Fork 0
/
bleve-indexer.go
615 lines (500 loc) · 15.4 KB
/
bleve-indexer.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
package backends
import (
"encoding/json"
"fmt"
"math"
"path"
"strings"
"time"
"github.com/blevesearch/bleve"
"github.com/blevesearch/bleve/analysis/analyzer/custom"
"github.com/blevesearch/bleve/analysis/char/regexp"
"github.com/blevesearch/bleve/analysis/token/lowercase"
"github.com/blevesearch/bleve/analysis/tokenizer/single"
"github.com/blevesearch/bleve/mapping"
"github.com/blevesearch/bleve/search/query"
"github.com/PerformLine/go-stockutil/log"
"github.com/PerformLine/go-stockutil/sliceutil"
"github.com/PerformLine/go-stockutil/stringutil"
"github.com/PerformLine/pivot/v3/dal"
"github.com/PerformLine/pivot/v3/filter"
"github.com/orcaman/concurrent-map"
)
var BleveBatchFlushCount = 1
var BleveBatchFlushInterval = 10 * time.Second
var BleveIdentityField = `_id`
type bleveDeferredBatch struct {
batch *bleve.Batch
lastFlush time.Time
}
type BleveIndexer struct {
Indexer
conn *dal.ConnectionString
parent Backend
indexCache map[string]bleve.Index
indexDeferredBatch cmap.ConcurrentMap
}
func NewBleveIndexer(connection dal.ConnectionString) *BleveIndexer {
return &BleveIndexer{
conn: &connection,
indexCache: make(map[string]bleve.Index),
indexDeferredBatch: cmap.New(),
}
}
func (self *BleveIndexer) IndexConnectionString() *dal.ConnectionString {
return self.conn
}
func (self *BleveIndexer) IndexInitialize(parent Backend) error {
self.parent = parent
return nil
}
func (self *BleveIndexer) GetBackend() Backend {
return self.parent
}
func (self *BleveIndexer) IndexRetrieve(collection *dal.Collection, id interface{}) (*dal.Record, error) {
defer stats.NewTiming().Send(`pivot.indexers.bleve.retrieve_time`)
if index, err := self.getIndexForCollection(collection); err == nil {
request := bleve.NewSearchRequest(bleve.NewDocIDQuery([]string{fmt.Sprintf("%v", id)}))
if results, err := index.Search(request); err == nil {
if results.Total == 1 {
return dal.NewRecord(results.Hits[0].ID).SetFields(results.Hits[0].Fields), nil
} else {
return nil, fmt.Errorf("Too many results; expected: 1, got: %d", results.Total)
}
} else {
return nil, err
}
} else {
return nil, err
}
}
func (self *BleveIndexer) IndexExists(collection *dal.Collection, id interface{}) bool {
if _, err := self.IndexRetrieve(collection, id); err == nil {
return true
}
return false
}
func (self *BleveIndexer) Index(collection *dal.Collection, records *dal.RecordSet) error {
defer stats.NewTiming().Send(`pivot.indexers.bleve.index_time`)
if index, err := self.getIndexForCollection(collection); err == nil {
name := collection.GetIndexName()
var batch *bleve.Batch
d, ok := self.indexDeferredBatch.Get(name)
if ok {
batch = d.(*bleveDeferredBatch).batch
} else {
batch = index.NewBatch()
self.indexDeferredBatch.Set(name, &bleveDeferredBatch{
batch: batch,
lastFlush: time.Now(),
})
}
for _, record := range records.Records {
querylog.Debugf("[%T] Adding %v to batch", self, record)
if err := batch.Index(fmt.Sprintf("%v", record.ID), record.Fields); err != nil {
return err
}
}
self.checkAndFlushBatches(false)
return nil
} else {
return err
}
}
func (self *BleveIndexer) checkAndFlushBatches(forceFlush bool) {
for item := range self.indexDeferredBatch.Iter() {
name := item.Key
deferred := item.Val.(*bleveDeferredBatch)
if deferred.batch != nil {
shouldFlush := false
if deferred.batch.Size() >= BleveBatchFlushCount {
shouldFlush = true
}
if time.Since(deferred.lastFlush) >= BleveBatchFlushInterval {
shouldFlush = true
}
if forceFlush {
shouldFlush = true
}
if shouldFlush {
defer stats.NewTiming().Send(`pivot.indexers.bleve.deferred_batch_flush`)
if index, err := self.getIndexForCollection(dal.NewCollection(name)); err == nil {
querylog.Debugf("[%T] Indexing %d records to %s", self, deferred.batch.Size(), name)
if err := index.Batch(deferred.batch); err == nil {
deferred.batch = index.NewBatch()
deferred.lastFlush = time.Now()
defer func() {
for _, key := range self.indexDeferredBatch.Keys() {
self.indexDeferredBatch.Remove(key)
}
}()
} else {
log.Errorf("[%T] error indexing %d records to %s: %v", self, deferred.batch.Size(), name, err)
}
}
}
}
}
}
func (self *BleveIndexer) QueryFunc(collection *dal.Collection, f *filter.Filter, resultFn IndexResultFunc) error {
defer stats.NewTiming().Send(`pivot.indexers.bleve.query_time`)
if f.IdentityField == `` {
f.IdentityField = BleveIdentityField
}
if index, err := self.getIndexForCollection(collection); err == nil {
if bq, err := self.filterToBleveQuery(index, f); err == nil {
limit := f.Limit
if limit == 0 || limit > IndexerPageSize {
limit = IndexerPageSize
}
offset := f.Offset
page := 1
processed := 0
// perform requests until we have enough results or the index is out of them
for {
request := bleve.NewSearchRequestOptions(bq, limit, offset, false)
// apply sorting (if specified)
if f.Sort != nil && len(f.Sort) > 0 {
request.SortBy(f.Sort)
}
// apply restriction on returned fields
if f.Fields != nil {
request.Fields = f.Fields
}
// perform search
if results, err := index.Search(request); err == nil {
querylog.Debugf("[%T] %+v", self, results)
if len(results.Hits) == 0 {
return nil
}
// totalPages = ceil(result count / page size)
totalPages := int(math.Ceil(float64(results.Total) / float64(f.Limit)))
if totalPages <= 0 {
totalPages = 1
}
// call the resultFn for each hit on this page
for _, hit := range results.Hits {
if err := resultFn(dal.NewRecord(hit.ID).SetFields(hit.Fields), nil, IndexPage{
Page: page,
TotalPages: totalPages,
Limit: f.Limit,
Offset: offset,
TotalResults: int64(results.Total),
}); err != nil {
return err
}
processed += 1
// if we have a limit set and we're at or beyond it
if f.Limit > 0 && processed >= f.Limit {
querylog.Debugf("[%T] %d at or beyond limit %d, returning results", self, processed, f.Limit)
return nil
}
}
// increment offset by the page size we just processed
page += 1
offset += len(results.Hits)
// if the offset is now beyond the total results count
if uint64(processed) >= results.Total {
querylog.Debugf("[%T] %d at or beyond total %d, returning results", self, processed, results.Total)
return nil
}
} else {
return err
}
}
} else {
return err
}
} else {
return err
}
}
func (self *BleveIndexer) Query(collection *dal.Collection, f *filter.Filter, resultFns ...IndexResultFunc) (*dal.RecordSet, error) {
if f.IdentityField == `` {
f.IdentityField = BleveIdentityField
}
return DefaultQueryImplementation(self, collection, f, resultFns...)
}
func (self *BleveIndexer) IndexRemove(collection *dal.Collection, ids []interface{}) error {
if index, err := self.getIndexForCollection(collection); err == nil {
batch := index.NewBatch()
for _, id := range ids {
batch.Delete(fmt.Sprintf("%v", id))
}
return index.Batch(batch)
} else {
return err
}
}
func (self *BleveIndexer) ListValues(collection *dal.Collection, fields []string, f *filter.Filter) (map[string][]interface{}, error) {
if index, err := self.getIndexForCollection(collection); err == nil {
if bq, err := self.filterToBleveQuery(index, f); err == nil {
request := bleve.NewSearchRequestOptions(bq, 0, 0, false)
request.Fields = []string{}
idQuery := false
for _, field := range fields {
switch field {
case `_id`, `id`:
idQuery = true
request.Size = MaxFacetCardinality
request.Fields = append(request.Fields, BleveIdentityField)
default:
request.AddFacet(
field,
bleve.NewFacetRequest(field, MaxFacetCardinality),
)
}
}
if results, err := index.Search(request); err == nil {
querylog.Debugf("[%T] %+v", self, results)
output := make(map[string][]interface{})
for name, facet := range results.Facets {
values := make([]interface{}, 0)
for _, term := range facet.Terms {
values = append(values, term.Term)
}
querylog.Debugf("[%T] facet %q (%d values)", self, name, len(values))
output[name] = sliceutil.Compact(values)
}
if idQuery {
values := make([]interface{}, 0)
for _, hit := range results.Hits {
values = append(values, stringutil.Autotype(hit.ID))
}
querylog.Debugf("[%T] facet _id (%d values)", self, len(values))
output[`id`] = values
}
return output, nil
} else {
return nil, err
}
} else {
return nil, err
}
} else {
return nil, err
}
}
func (self *BleveIndexer) DeleteQuery(collection *dal.Collection, f *filter.Filter) error {
f.Fields = []string{BleveIdentityField}
var ids []interface{}
if err := self.QueryFunc(collection, f, func(indexRecord *dal.Record, err error, page IndexPage) error {
ids = append(ids, indexRecord.ID)
return nil
}); err == nil {
return self.parent.Delete(collection.Name, ids)
} else {
return err
}
}
func (self *BleveIndexer) FlushIndex() error {
self.checkAndFlushBatches(true)
return nil
}
func (self *BleveIndexer) getIndexForCollection(collection *dal.Collection) (bleve.Index, error) {
defer stats.NewTiming().Send(`pivot.indexers.bleve.retrieve_index`)
name := collection.GetIndexName()
if v, ok := self.indexCache[name]; ok {
return v, nil
} else {
var index bleve.Index
mapping := bleve.NewIndexMapping()
// setup the mapping and text analysis settings for this index
self.useFilterMapping(mapping)
switch self.conn.Dataset() {
case `memory`:
if ix, err := bleve.NewMemOnly(mapping); err == nil {
index = ix
} else {
return nil, err
}
default:
indexBaseDir := self.conn.Dataset()
indexPath := path.Join(indexBaseDir, name)
if ix, err := bleve.Open(indexPath); err == nil {
index = ix
} else if ix, err := bleve.New(indexPath, mapping); err == nil {
index = ix
} else {
return nil, err
}
}
self.indexCache[name] = index
return index, nil
}
}
func (self *BleveIndexer) filterToBleveQuery(index bleve.Index, f *filter.Filter) (query.Query, error) {
defer stats.NewTiming().Send(`pivot.indexers.bleve.filter_to_native`)
if f.MatchAll {
return bleve.NewMatchAllQuery(), nil
} else {
mapping := index.Mapping()
conjunction := bleve.NewConjunctionQuery()
for _, criterion := range f.Criteria {
// map any field called "id" to the identity field name
if criterion.Field == `id` {
if f.IdentityField == `` {
criterion.Field = BleveIdentityField
} else {
criterion.Field = f.IdentityField
}
}
var skipNext bool
var disjunction *query.DisjunctionQuery
analyzerName := mapping.AnalyzerNameForPath(criterion.Field)
// this handles AND (field=a OR b OR ...)
if len(criterion.Values) > 1 {
disjunction = bleve.NewDisjunctionQuery()
}
for _, vI := range criterion.Values {
value := fmt.Sprintf("%v", vI)
var analyzedValue string
var invertQuery bool
if az := mapping.AnalyzerNamed(analyzerName); az != nil {
for _, token := range az.Analyze([]byte(value[:])) {
analyzedValue += string(token.Term[:])
}
} else {
analyzedValue = value
}
var currentQuery query.FieldableQuery
switch criterion.Operator {
case `is`, ``, `not`, `like`, `unlike`:
switch criterion.Operator {
case `not`, `unlike`:
invertQuery = true
}
if criterion.Field == f.IdentityField {
q := bleve.NewDocIDQuery(sliceutil.Stringify(criterion.Values))
if invertQuery {
bq := bleve.NewBooleanQuery()
bq.AddMustNot(q)
conjunction.AddQuery(bq)
} else {
conjunction.AddQuery(q)
}
skipNext = true
break
} else {
switch analyzedValue {
case `null`:
currentQuery = bleve.NewTermQuery(``)
case `true`:
currentQuery = bleve.NewBoolFieldQuery(true)
case `false`:
currentQuery = bleve.NewBoolFieldQuery(false)
default:
currentQuery = bleve.NewTermQuery(analyzedValue)
}
}
case `prefix`:
currentQuery = bleve.NewWildcardQuery(analyzedValue + `*`)
case `suffix`:
currentQuery = bleve.NewWildcardQuery(`*` + analyzedValue)
case `contains`:
currentQuery = bleve.NewWildcardQuery(`*` + analyzedValue + `*`)
case `gt`, `lt`, `gte`, `lte`:
var minInc, maxInc bool
if strings.HasPrefix(criterion.Operator, `gt`) {
minInc = strings.HasSuffix(criterion.Operator, `e`)
} else {
maxInc = strings.HasSuffix(criterion.Operator, `e`)
}
switch criterion.Type {
case dal.TimeType:
var min, max time.Time
if v, err := stringutil.ConvertToTime(analyzedValue); err == nil {
if strings.HasPrefix(criterion.Operator, `gt`) {
min = v
} else {
max = v
}
} else {
return nil, err
}
currentQuery = query.NewDateRangeInclusiveQuery(min, max, &minInc, &maxInc)
default:
var min, max *float64
if v, err := stringutil.ConvertToFloat(analyzedValue); err == nil {
if strings.HasPrefix(criterion.Operator, `gt`) {
min = &v
} else {
max = &v
}
} else {
return nil, err
}
currentQuery = bleve.NewNumericRangeInclusiveQuery(min, max, &minInc, &maxInc)
}
// case `not`:
// q := bleve.NewBooleanQuery()
// var subquery query.FieldableQuery
// if analyzedValue == `null` {
// subquery = bleve.NewTermQuery(``)
// } else {
// subquery = bleve.NewTermQuery(analyzedValue)
// }
// subquery.SetField(criterion.Field)
// q.AddMustNot(subquery)
// if disjunction != nil {
// disjunction.AddQuery(q)
// conjunction.AddQuery(disjunction)
// }else{
// conjunction.AddQuery(q)
// }
// continue
default:
return nil, fmt.Errorf("Unimplemented operator '%s'", criterion.Operator)
}
if currentQuery != nil {
currentQuery.SetField(criterion.Field)
if invertQuery {
inversionQuery := bleve.NewBooleanQuery()
inversionQuery.AddMustNot(currentQuery)
if disjunction != nil {
disjunction.AddQuery(inversionQuery)
} else {
conjunction.AddQuery(inversionQuery)
}
} else {
if disjunction != nil {
disjunction.AddQuery(currentQuery)
} else {
conjunction.AddQuery(currentQuery)
}
}
}
}
if skipNext {
continue
}
if disjunction != nil {
conjunction.AddQuery(disjunction)
}
}
if len(conjunction.Conjuncts) > 0 {
data, _ := json.MarshalIndent(conjunction, ``, ` `)
querylog.Debugf("[%T] Query: %v", self, string(data[:]))
return conjunction, nil
} else {
return nil, fmt.Errorf("Filter did not produce a valid query")
}
}
}
func (self *BleveIndexer) useFilterMapping(mappingImpl *mapping.IndexMappingImpl) {
mappingImpl.AddCustomCharFilter(`remove_expression_tokens`, map[string]interface{}{
`type`: regexp.Name,
`regexp`: `[\:\[\]\*]+`,
})
mappingImpl.AddCustomAnalyzer(`pivot_filter`, map[string]interface{}{
`type`: custom.Name,
`char_filters`: []string{
`remove_expression_tokens`,
},
`tokenizer`: single.Name,
`token_filters`: []string{
lowercase.Name,
},
})
mappingImpl.DefaultAnalyzer = `pivot_filter`
}