-
Notifications
You must be signed in to change notification settings - Fork 336
/
tx_list.go
517 lines (430 loc) · 12 KB
/
tx_list.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
// Copyright 2019 The nutsdb Author. All rights reserved.
//
// 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 nutsdb
import (
"bytes"
"sort"
"strings"
"time"
"github.com/pkg/errors"
"github.com/xujiajun/utils/strconv2"
)
var bucketKeySeqMap map[string]*HeadTailSeq
// ErrSeparatorForListKey returns when list key contains the SeparatorForListKey.
var ErrSeparatorForListKey = errors.Errorf("contain separator (%s) for List key", SeparatorForListKey)
// SeparatorForListKey represents separator for listKey
const SeparatorForListKey = "|"
// RPop removes and returns the last element of the list stored in the bucket at given bucket and key.
func (tx *Tx) RPop(bucket string, key []byte) (item []byte, err error) {
item, err = tx.RPeek(bucket, key)
if err != nil {
return
}
return item, tx.push(bucket, key, DataRPopFlag, item)
}
// RPeek returns the last element of the list stored in the bucket at given bucket and key.
func (tx *Tx) RPeek(bucket string, key []byte) ([]byte, error) {
if err := tx.checkTxIsClosed(); err != nil {
return nil, err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return nil, err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return nil, ErrBucket
}
if tx.CheckExpire(bucket, key) {
return nil, ErrListNotFound
}
item, err := l.RPeek(string(key))
if err != nil {
return nil, err
}
v, err := tx.db.getValueByRecord(item.record)
if err != nil {
return nil, err
}
return v, nil
}
// push sets values for list stored in the bucket at given bucket, key, flag and values.
func (tx *Tx) push(bucket string, key []byte, flag uint16, values ...[]byte) error {
for _, value := range values {
err := tx.put(bucket, key, value, Persistent, flag, uint64(time.Now().Unix()), DataStructureList)
if err != nil {
return err
}
}
return nil
}
func (tx *Tx) getListNewKey(bucket string, key []byte, isLeft bool) []byte {
if bucketKeySeqMap == nil {
bucketKeySeqMap = make(map[string]*HeadTailSeq)
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return nil
}
bucketId := b.Id
bucketKey := bucket + string(key)
if _, ok := bucketKeySeqMap[bucketKey]; !ok {
bucketKeySeqMap[bucketKey] = tx.getListHeadTailSeq(bucketId, string(key))
}
seq := generateSeq(bucketKeySeqMap[bucketKey], isLeft)
return encodeListKey(key, seq)
}
// RPush inserts the values at the tail of the list stored in the bucket at given bucket,key and values.
func (tx *Tx) RPush(bucket string, key []byte, values ...[]byte) error {
if err := tx.isKeyValid(bucket, key); err != nil {
return err
}
if strings.Contains(string(key), SeparatorForListKey) {
return ErrSeparatorForListKey
}
for _, value := range values {
newKey := tx.getListNewKey(bucket, key, false)
err := tx.push(bucket, newKey, DataLPushFlag, value)
if err != nil {
return err
}
}
return nil
}
// LPush inserts the values at the head of the list stored in the bucket at given bucket,key and values.
func (tx *Tx) LPush(bucket string, key []byte, values ...[]byte) error {
if err := tx.isKeyValid(bucket, key); err != nil {
return err
}
if strings.Contains(string(key), SeparatorForListKey) {
return ErrSeparatorForListKey
}
for _, value := range values {
newKey := tx.getListNewKey(bucket, key, true)
err := tx.push(bucket, newKey, DataLPushFlag, value)
if err != nil {
return err
}
}
return nil
}
func (tx *Tx) isKeyValid(bucket string, key []byte) error {
if err := tx.checkTxIsClosed(); err != nil {
return err
}
if tx.CheckExpire(bucket, key) {
return ErrListNotFound
}
return nil
}
func (tx *Tx) LPushRaw(bucket string, key []byte, values ...[]byte) error {
if err := tx.isKeyValid(bucket, key); err != nil {
return err
}
return tx.push(bucket, key, DataLPushFlag, values...)
}
func (tx *Tx) RPushRaw(bucket string, key []byte, values ...[]byte) error {
if err := tx.isKeyValid(bucket, key); err != nil {
return err
}
return tx.push(bucket, key, DataRPushFlag, values...)
}
// LPop removes and returns the first element of the list stored in the bucket at given bucket and key.
func (tx *Tx) LPop(bucket string, key []byte) (item []byte, err error) {
item, err = tx.LPeek(bucket, key)
if err != nil {
return
}
return item, tx.push(bucket, key, DataLPopFlag, item)
}
// LPeek returns the first element of the list stored in the bucket at given bucket and key.
func (tx *Tx) LPeek(bucket string, key []byte) (item []byte, err error) {
if err := tx.checkTxIsClosed(); err != nil {
return nil, err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return nil, err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return nil, ErrBucket
}
if tx.CheckExpire(bucket, key) {
return nil, ErrListNotFound
}
r, err := l.LPeek(string(key))
if err != nil {
return nil, err
}
v, err := tx.db.getValueByRecord(r.record)
if err != nil {
return nil, err
}
return v, nil
}
// LSize returns the size of key in the bucket in the bucket at given bucket and key.
func (tx *Tx) LSize(bucket string, key []byte) (int, error) {
if err := tx.checkTxIsClosed(); err != nil {
return 0, err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return 0, err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return 0, ErrBucket
}
if tx.CheckExpire(bucket, key) {
return 0, ErrListNotFound
}
return l.Size(string(key))
}
// LRange returns the specified elements of the list stored in the bucket at given bucket,key, start and end.
// The offsets start and stop are zero-based indexes 0 being the first element of the list (the head of the list),
// 1 being the next element and so on.
// Start and end can also be negative numbers indicating offsets from the end of the list,
// where -1 is the last element of the list, -2 the penultimate element and so on.
func (tx *Tx) LRange(bucket string, key []byte, start, end int) ([][]byte, error) {
if err := tx.checkTxIsClosed(); err != nil {
return nil, err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return nil, err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return nil, ErrBucket
}
if tx.CheckExpire(bucket, key) {
return nil, ErrListNotFound
}
records, err := l.LRange(string(key), start, end)
if err != nil {
return nil, err
}
values := make([][]byte, len(records))
for i, r := range records {
value, err := tx.db.getValueByRecord(r)
if err != nil {
return nil, err
}
values[i] = value
}
return values, nil
}
// LRem removes the first count occurrences of elements equal to value from the list stored in the bucket at given bucket,key,count.
// The count argument influences the operation in the following ways:
// count > 0: Remove elements equal to value moving from head to tail.
// count < 0: Remove elements equal to value moving from tail to head.
// count = 0: Remove all elements equal to value.
func (tx *Tx) LRem(bucket string, key []byte, count int, value []byte) error {
var (
buffer bytes.Buffer
size int
)
size, err := tx.LSize(bucket, key)
if err != nil {
return err
}
if count > size || count < -size {
return ErrCount
}
buffer.Write([]byte(strconv2.IntToStr(count)))
buffer.Write([]byte(SeparatorForListKey))
buffer.Write(value)
newValue := buffer.Bytes()
err = tx.push(bucket, key, DataLRemFlag, newValue)
if err != nil {
return err
}
return nil
}
// LTrim trims an existing list so that it will contain only the specified range of elements specified.
// the offsets start and stop are zero-based indexes 0 being the first element of the list (the head of the list),
// 1 being the next element and so on.
// start and end can also be negative numbers indicating offsets from the end of the list,
// where -1 is the last element of the list, -2 the penultimate element and so on.
func (tx *Tx) LTrim(bucket string, key []byte, start, end int) error {
var (
err error
buffer bytes.Buffer
)
if err = tx.checkTxIsClosed(); err != nil {
return err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return ErrBucket
}
if tx.CheckExpire(bucket, key) {
return ErrListNotFound
}
if _, ok := l.Items[string(key)]; !ok {
return ErrListNotFound
}
if _, err := tx.LRange(bucket, key, start, end); err != nil {
return err
}
buffer.Write(key)
buffer.Write([]byte(SeparatorForListKey))
buffer.Write([]byte(strconv2.IntToStr(start)))
newKey := buffer.Bytes()
return tx.push(bucket, newKey, DataLTrimFlag, []byte(strconv2.IntToStr(end)))
}
// LRemByIndex remove the list element at specified index
func (tx *Tx) LRemByIndex(bucket string, key []byte, indexes ...int) error {
if err := tx.checkTxIsClosed(); err != nil {
return err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return err
}
bucketId := b.Id
if _, ok := tx.db.Index.list.exist(bucketId); !ok {
return ErrListNotFound
}
if tx.CheckExpire(bucket, key) {
return ErrListNotFound
}
if len(indexes) == 0 {
return nil
}
sort.Ints(indexes)
data, err := MarshalInts(indexes)
if err != nil {
return err
}
err = tx.push(bucket, key, DataLRemByIndex, data)
if err != nil {
return err
}
return nil
}
// LKeys find all keys matching a given pattern
func (tx *Tx) LKeys(bucket, pattern string, f func(key string) bool) error {
if err := tx.checkTxIsClosed(); err != nil {
return err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return ErrBucket
}
for key := range l.Items {
if tx.CheckExpire(bucket, []byte(key)) {
continue
}
if end, err := MatchForRange(pattern, key, f); end || err != nil {
return err
}
}
return nil
}
func (tx *Tx) ExpireList(bucket string, key []byte, ttl uint32) error {
if err := tx.checkTxIsClosed(); err != nil {
return err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return ErrBucket
}
l.TTL[string(key)] = ttl
l.TimeStamp[string(key)] = uint64(time.Now().Unix())
ttls := strconv2.Int64ToStr(int64(ttl))
err = tx.push(bucket, key, DataExpireListFlag, []byte(ttls))
if err != nil {
return err
}
return nil
}
func (tx *Tx) CheckExpire(bucket string, key []byte) bool {
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return false
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return false
}
if l.IsExpire(string(key)) {
_ = tx.push(bucket, key, DataDeleteFlag)
return true
}
return false
}
func (tx *Tx) GetListTTL(bucket string, key []byte) (uint32, error) {
if err := tx.checkTxIsClosed(); err != nil {
return 0, err
}
b, err := tx.db.bm.GetBucket(DataStructureList, bucket)
if err != nil {
return 0, err
}
var (
bucketId = b.Id
l *List
exist bool
)
if l, exist = tx.db.Index.list.exist(bucketId); !exist {
return 0, ErrBucket
}
return l.GetListTTL(string(key))
}