-
Notifications
You must be signed in to change notification settings - Fork 19
/
memdclientdialer_component.go
775 lines (659 loc) · 23.1 KB
/
memdclientdialer_component.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
package gocbcore
import (
"context"
"crypto/tls"
"errors"
"sync"
"sync/atomic"
"time"
"github.com/couchbase/gocbcore/v10/memd"
)
type helloProps struct {
MutationTokensEnabled bool
CollectionsEnabled bool
CompressionEnabled bool
DurationsEnabled bool
OutOfOrderEnabled bool
JSONFeatureEnabled bool
XErrorFeatureEnabled bool
SyncReplicationEnabled bool
PITRFeatureEnabled bool
ResourceUnitsEnabled bool
ClusterMapNotificationsEnabled bool
}
type bootstrapProps struct {
Bucket string
UserAgent string
ErrMapManager *errMapComponent
HelloProps helloProps
}
type memdClientDialerComponent struct {
kvConnectTimeout time.Duration
serverWaitTimeout time.Duration
clientID string
breakerCfg CircuitBreakerConfig
compressionMinSize int
compressionMinRatio float64
disableDecompression bool
connBufSize uint
serverFailuresLock sync.Mutex
serverFailures map[string]time.Time
tracer *tracerComponent
zombieLogger *zombieLoggerComponent
bootstrapProps bootstrapProps
bootstrapFailHandlersLock sync.Mutex
bootstrapFailHandlers []memdBoostrapFailHandler
cccpUnsupportedHandlersLock sync.Mutex
cccpUnsupportedFailHandlers []memdBoostrapCCCPUnsupportedHandler
configApplied uint32
noTLSSeedNode bool
dcpBootstrapProps *memdBootstrapDCPProps
dcpQueueSize int
cfgManager *configManagementComponent
}
type memdBootstrapDCPProps struct {
disableBufferAcknowledgement bool
useOSOBackfill bool
useStreamID bool
useChangeStreams bool
useExpiryOpcode bool
backfillOrderStr string
priorityStr string
streamName string
openFlags memd.DcpOpenFlag
bufferSize int
}
type memdClientDialerProps struct {
KVConnectTimeout time.Duration
ServerWaitTimeout time.Duration
ClientID string
CompressionMinSize int
CompressionMinRatio float64
DisableDecompression bool
NoTLSSeedNode bool
ConnBufSize uint
DCPBootstrapProps *memdBootstrapDCPProps
DCPQueueSize int
}
type memdBoostrapFailHandler interface {
onBootstrapFail(error)
}
type memdBoostrapCCCPUnsupportedHandler interface {
onCCCPUnsupported(error)
}
func newMemdClientDialerComponent(props memdClientDialerProps, bSettings bootstrapProps, breakerCfg CircuitBreakerConfig,
zLogger *zombieLoggerComponent, tracer *tracerComponent, cfgManager *configManagementComponent) *memdClientDialerComponent {
dialer := &memdClientDialerComponent{
kvConnectTimeout: props.KVConnectTimeout,
serverWaitTimeout: props.ServerWaitTimeout,
clientID: props.ClientID,
breakerCfg: breakerCfg,
zombieLogger: zLogger,
tracer: tracer,
serverFailures: make(map[string]time.Time),
bootstrapProps: bSettings,
dcpBootstrapProps: props.DCPBootstrapProps,
dcpQueueSize: props.DCPQueueSize,
compressionMinSize: props.CompressionMinSize,
compressionMinRatio: props.CompressionMinRatio,
disableDecompression: props.DisableDecompression,
noTLSSeedNode: props.NoTLSSeedNode,
connBufSize: props.ConnBufSize,
cfgManager: cfgManager,
}
cfgManager.AddConfigWatcher(dialer)
return dialer
}
func (mcc *memdClientDialerComponent) ResetConfig() {
atomic.StoreUint32(&mcc.configApplied, 0)
mcc.cfgManager.AddConfigWatcher(mcc)
}
func (mcc *memdClientDialerComponent) OnNewRouteConfig(cfg *routeConfig) {
if cfg.revID == -1 {
return
}
atomic.StoreUint32(&mcc.configApplied, 1)
mcc.cfgManager.RemoveConfigWatcher(mcc)
}
func (mcc *memdClientDialerComponent) AddBootstrapFailHandler(handler memdBoostrapFailHandler) {
mcc.bootstrapFailHandlersLock.Lock()
mcc.bootstrapFailHandlers = append(mcc.bootstrapFailHandlers, handler)
mcc.bootstrapFailHandlersLock.Unlock()
}
func (mcc *memdClientDialerComponent) AddCCCPUnsupportedHandler(handler memdBoostrapCCCPUnsupportedHandler) {
mcc.cccpUnsupportedHandlersLock.Lock()
mcc.cccpUnsupportedFailHandlers = append(mcc.cccpUnsupportedFailHandlers, handler)
mcc.cccpUnsupportedHandlersLock.Unlock()
}
func (mcc *memdClientDialerComponent) RemoveBootstrapFailHandler(handler memdBoostrapFailHandler) {
var idx int
mcc.bootstrapFailHandlersLock.Lock()
for i, w := range mcc.bootstrapFailHandlers {
if w == handler {
idx = i
}
}
if idx == len(mcc.bootstrapFailHandlers) {
mcc.bootstrapFailHandlers = mcc.bootstrapFailHandlers[:idx]
} else {
mcc.bootstrapFailHandlers = append(mcc.bootstrapFailHandlers[:idx], mcc.bootstrapFailHandlers[idx+1:]...)
}
mcc.bootstrapFailHandlersLock.Unlock()
}
func (mcc *memdClientDialerComponent) SlowDialMemdClient(cancelSig <-chan struct{}, address routeEndpoint, tlsConfig *dynTLSConfig,
auth AuthProvider, authMechanisms []AuthMechanism, postCompleteHandler postCompleteErrorHandler,
serverRequestHandler serverRequestHandler) (*memdClient, error) {
mcc.serverFailuresLock.Lock()
failureTime := mcc.serverFailures[address.Address]
mcc.serverFailuresLock.Unlock()
if !failureTime.IsZero() {
waitedTime := time.Since(failureTime)
if waitedTime < mcc.serverWaitTimeout {
select {
case <-cancelSig:
return nil, errRequestCanceled
case <-time.After(mcc.serverWaitTimeout - waitedTime):
}
}
}
deadline := time.Now().Add(mcc.kvConnectTimeout)
client, err := mcc.dialMemdClient(cancelSig, address, deadline, postCompleteHandler, tlsConfig, serverRequestHandler)
if err != nil {
if !errors.Is(err, ErrRequestCanceled) {
mcc.serverFailuresLock.Lock()
mcc.serverFailures[address.Address] = time.Now()
mcc.serverFailuresLock.Unlock()
}
return nil, err
}
bClient := newMemdBootstrapClient(client, cancelSig)
if mcc.dcpBootstrapProps == nil {
err = mcc.bootstrap(bClient, deadline, authMechanisms, auth)
} else {
err = mcc.dcpBootstrap(newDCPBootstrapClient(bClient), deadline, authMechanisms, auth)
}
if err != nil {
closeErr := client.Close()
if closeErr != nil {
logWarnf("Failed to close authentication client (%s)", closeErr)
}
if !errors.Is(err, ErrForcedReconnect) {
mcc.serverFailuresLock.Lock()
mcc.serverFailures[address.Address] = time.Now()
mcc.serverFailuresLock.Unlock()
}
mcc.bootstrapFailHandlersLock.Lock()
handlers := make([]memdBoostrapFailHandler, len(mcc.bootstrapFailHandlers))
copy(handlers, mcc.bootstrapFailHandlers)
mcc.bootstrapFailHandlersLock.Unlock()
for _, handler := range handlers {
handler.onBootstrapFail(err)
}
return nil, err
}
return client, nil
}
func (mcc *memdClientDialerComponent) dialMemdClient(cancelSig <-chan struct{}, address routeEndpoint, deadline time.Time,
postCompleteHandler postCompleteErrorHandler, dynTls *dynTLSConfig, serverRequestHandler serverRequestHandler) (*memdClient, error) {
// Copy the tls configuration since we need to provide the hostname for each
// server that we connect to so that the certificate can be validated properly.
var tlsConfig *tls.Config
if dynTls != nil && !(mcc.noTLSSeedNode && address.IsSeedNode) {
srvTLSConfig, err := dynTls.MakeForAddr(address.Address)
if err != nil {
return nil, err
}
tlsConfig = srvTLSConfig
}
ctx, cancel := context.WithCancel(context.Background())
go func() {
select {
case <-ctx.Done():
return
case <-cancelSig:
cancel()
}
}()
conn, err := dialMemdConn(ctx, address.Address, tlsConfig, deadline, mcc.connBufSize)
cancel()
if err != nil {
if errors.Is(err, context.Canceled) {
err = errRequestCanceled
} else {
err = wrapError(err, "check server ports and cluster encryption setting")
}
logDebugf("Failed to connect. %v", err)
return nil, err
}
client := newMemdClient(
memdClientProps{
ClientID: mcc.clientID,
DCPQueueSize: mcc.dcpQueueSize,
DisableDecompression: mcc.disableDecompression,
CompressionMinRatio: mcc.compressionMinRatio,
CompressionMinSize: mcc.compressionMinSize,
},
conn,
mcc.breakerCfg,
postCompleteHandler,
mcc.tracer,
mcc.zombieLogger,
serverRequestHandler,
)
return client, err
}
func (mcc *memdClientDialerComponent) dcpBootstrap(client *dcpBootstrapClient, deadline time.Time,
authMechanisms []AuthMechanism, authProvider AuthProvider) error {
if err := mcc.bootstrap(client, deadline, authMechanisms, authProvider); err != nil {
return err
}
if err := client.ExecOpenDcpConsumer(mcc.dcpBootstrapProps.streamName, mcc.dcpBootstrapProps.openFlags, deadline); err != nil {
return err
}
if err := client.ExecEnableDcpNoop(180*time.Second, deadline); err != nil {
return err
}
if mcc.dcpBootstrapProps.priorityStr != "" {
if err := client.ExecDcpControl("set_priority", mcc.dcpBootstrapProps.priorityStr, deadline); err != nil {
return err
}
}
if mcc.dcpBootstrapProps.useChangeStreams {
if err := client.ExecDcpControl("change_streams", "true", deadline); err != nil {
return err
}
}
if mcc.dcpBootstrapProps.useExpiryOpcode {
if err := client.ExecDcpControl("enable_expiry_opcode", "true", deadline); err != nil {
return err
}
}
if mcc.dcpBootstrapProps.useStreamID {
if err := client.ExecDcpControl("enable_stream_id", "true", deadline); err != nil {
return err
}
}
if mcc.dcpBootstrapProps.useOSOBackfill {
if err := client.ExecDcpControl("enable_out_of_order_snapshots", "true_with_seqno_advanced", deadline); err != nil {
return err
}
}
if mcc.dcpBootstrapProps.backfillOrderStr != "" {
if err := client.ExecDcpControl("backfill_order", mcc.dcpBootstrapProps.backfillOrderStr, deadline); err != nil {
return err
}
}
if !mcc.dcpBootstrapProps.disableBufferAcknowledgement {
if err := client.ExecEnableDcpBufferAck(mcc.dcpBootstrapProps.bufferSize, deadline); err != nil {
return err
}
}
return client.ExecEnableDcpClientEnd(deadline)
}
func (mcc *memdClientDialerComponent) bootstrap(client bootstrapClient, deadline time.Time,
authMechanisms []AuthMechanism, authProvider AuthProvider) error {
logDebugf("Memdclient %s Fetching cluster client data", client.LoggerID())
bucket := mcc.bootstrapProps.Bucket
features := helloFeatures(mcc.bootstrapProps.HelloProps)
clientInfoStr := clientInfoString(client.ConnID(), mcc.bootstrapProps.UserAgent)
helloCh, err := client.ExecHello(clientInfoStr, features, deadline)
if err != nil {
logDebugf("Memdclient %s Failed to execute HELLO (%v)", client.LoggerID(), err)
return err
}
errMapCh, err := client.ExecGetErrorMap(2, deadline)
if err != nil {
// GetErrorMap isn't integral to bootstrap succeeding
logDebugf("Memdclient %s Failed to execute Get error map (%v)", client.LoggerID(), err)
}
var listMechsCh chan SaslListMechsCompleted
var completedAuthCh chan error
var continueAuthCh chan bool
firstAuthMethod := mcc.buildAuthHandler(client, authProvider, deadline, authMechanisms[0])
if firstAuthMethod != nil {
// If the auth method is nil then we don't actually need to do any auth so no need to Get the mechanisms.
listMechsCh = make(chan SaslListMechsCompleted, 1)
err = client.SaslListMechs(deadline, func(mechs []AuthMechanism, err error) {
if err != nil {
logDebugf("Memdclient %s Failed to fetch list auth mechs (%v)", client.LoggerID(), err)
}
listMechsCh <- SaslListMechsCompleted{
Err: err,
Mechs: mechs,
}
})
if err != nil {
logDebugf("Memdclient %s Failed to execute list auth mechs (%v)", client.LoggerID(), err)
}
completedAuthCh, continueAuthCh, err = firstAuthMethod()
if err != nil {
logDebugf("Memdclient %s Failed to execute auth (%v)", client.LoggerID(), err)
return err
}
}
var selectCh chan error
var configCh chan getConfigResponse
// If there's no bucket then we don't need to do select bucket, we also don't need to wait for the continue channel,
// as it will never be read and will be garbage collected.
if continueAuthCh == nil {
if bucket != "" {
selectCh, err = client.ExecSelectBucket([]byte(bucket), deadline)
if err != nil {
logDebugf("Memdclient %s Failed to execute select bucket (%v)", client.LoggerID(), err)
return err
}
}
if atomic.LoadUint32(&mcc.configApplied) == 0 {
configCh, err = client.ExecGetConfig(deadline)
if err != nil {
// Getting a config isn't essential to bootstrap.
logDebugf("Memdclient %s Failed to execute get config (%v)", client.LoggerID(), err)
}
}
} else {
selectCh, configCh = mcc.continueAfterAuth(client, bucket, continueAuthCh, deadline)
}
helloResp := <-helloCh
if helloResp.Err != nil {
logDebugf("Memdclient %s Failed to hello with server (%v)", client.LoggerID(), helloResp.Err)
return helloResp.Err
}
if errMapCh != nil {
errMapResp := <-errMapCh
if errMapResp.Err == nil {
mcc.bootstrapProps.ErrMapManager.StoreErrorMap(errMapResp.Bytes)
} else {
logDebugf("Memdclient %s Failed to fetch kv error map (%s)", client.LoggerID(), errMapResp.Err)
}
}
var serverAuthMechanisms []AuthMechanism
if listMechsCh != nil {
listMechsResp := <-listMechsCh
if listMechsResp.Err == nil {
serverAuthMechanisms = listMechsResp.Mechs
logDebugf("Memdclient %s Server supported auth mechanisms: %v", client.LoggerID(), serverAuthMechanisms)
} else {
logDebugf("Memdclient %s Failed to fetch auth mechs from server (%v)", client.LoggerID(), listMechsResp.Err)
}
}
// If completedAuthCh isn't nil then we have attempted to do auth so we need to wait on the result of that.
if completedAuthCh != nil {
authErr := <-completedAuthCh
if authErr != nil {
logDebugf("Memdclient %s Failed to perform auth against server (%v)", client.LoggerID(), authErr)
if errors.Is(authErr, ErrRequestCanceled) {
// There's no point in us trying different mechanisms if something has cancelled bootstrapping.
return authErr
} else if errors.Is(authErr, ErrAuthenticationFailure) {
// If there's only one auth mechanism then we can just fail.
if len(authMechanisms) == 1 {
return authErr
}
// If the server supports the mechanism we've tried then this auth error can't be due to an unsupported
// mechanism.
for _, mech := range serverAuthMechanisms {
if mech == authMechanisms[0] {
return authErr
}
}
// If we've got here then the auth mechanism we tried is unsupported so let's keep trying with the next
// supported mechanism.
logInfof("Memdclient `%s` Unsupported authentication mechanism, will attempt to find next supported mechanism", client.ConnID())
}
for {
var found bool
var mech AuthMechanism
found, mech, authMechanisms = findNextAuthMechanism(authMechanisms, serverAuthMechanisms)
if !found {
logDebugf("Memdclient %s Failed to authenticate, all options exhausted", client.LoggerID())
return authErr
}
logDebugf("Memdclient %s Retrying authentication with found supported mechanism: %s", client.LoggerID(), mech)
nextAuthFunc := mcc.buildAuthHandler(client, authProvider, deadline, mech)
if nextAuthFunc == nil {
// This can't really happen but just in case it somehow does.
logInfof("Memdclient `%p` Failed to authenticate, no available credentials", client)
return authErr
}
completedAuthCh, continueAuthCh, err = nextAuthFunc()
if err != nil {
logDebugf("Memdclient %s Failed to execute auth (%v)", client.LoggerID(), err)
return err
}
if continueAuthCh == nil {
if bucket != "" {
selectCh, err = client.ExecSelectBucket([]byte(bucket), deadline)
if err != nil {
logDebugf("Memdclient %s Failed to execute select bucket (%v)", client.LoggerID(), err)
return err
}
}
if atomic.LoadUint32(&mcc.configApplied) == 0 {
configCh, err = client.ExecGetConfig(deadline)
if err != nil {
// Getting a config isn't essential to bootstrap.
logDebugf("Memdclient %s Failed to execute get config (%v)", client.LoggerID(), err)
}
}
} else {
selectCh, configCh = mcc.continueAfterAuth(client, bucket, continueAuthCh, deadline)
}
authErr = <-completedAuthCh
if authErr == nil {
break
}
logDebugf("Memdclient %s Failed to perform auth against server (%v)", client.LoggerID(), authErr)
if errors.Is(authErr, ErrAuthenticationFailure) || errors.Is(err, ErrRequestCanceled) {
return authErr
}
}
}
logDebugf("Memdclient %s Authenticated successfully", client.LoggerID())
}
if selectCh != nil {
selectErr := <-selectCh
if selectErr != nil {
logDebugf("Memdclient %s Failed to perform select bucket against server (%v)", client.LoggerID(), selectErr)
return selectErr
}
}
if configCh != nil {
configResp := <-configCh
err = configResp.Err
if err == nil {
// We don't want this to block us completing bootstrap.
go mcc.cfgManager.OnNewConfig(configResp.Config)
} else {
logDebugf("Memdclient %s Failed to perform config fetch against server (%v)", client.LoggerID(), err)
if errors.Is(err, ErrDocumentNotFound) {
logDebugf("Memdclient %s detected that CCCP is unsupported, informing upstream", client.LoggerID())
mcc.sendErrorToCCCPUnsupportedHandlers()
}
}
}
client.Features(helloResp.SrvFeatures)
logDebugf("Memdclient %s Client Features: %+v", client.LoggerID(), features)
logDebugf("Memdclient %s Server Features: %+v", client.LoggerID(), helloResp.SrvFeatures)
return nil
}
func (mcc *memdClientDialerComponent) continueAfterAuth(client bootstrapClient, bucketName string, continueAuthCh chan bool,
deadline time.Time) (chan error, chan getConfigResponse) {
var selectCh chan error
if bucketName != "" {
selectCh = make(chan error, 1)
}
var configCh chan getConfigResponse
if atomic.LoadUint32(&mcc.configApplied) == 0 {
configCh = make(chan getConfigResponse, 1)
}
go func() {
success := <-continueAuthCh
if !success {
if selectCh != nil {
close(selectCh)
}
if configCh != nil {
close(configCh)
}
return
}
var execCh chan error
if selectCh != nil {
var err error
execCh, err = client.ExecSelectBucket([]byte(bucketName), deadline)
if err != nil {
logDebugf("Memdclient %s Failed to execute select bucket (%v)", client.LoggerID(), err)
selectCh <- err
return
}
}
var execConfigCh chan getConfigResponse
if configCh != nil {
var err error
execConfigCh, err = client.ExecGetConfig(deadline)
if err != nil {
// Getting a config isn't essential to bootstrap.
logDebugf("Memdclient %s Failed to execute get config (%v)", client.LoggerID(), err)
close(configCh)
return
}
}
if selectCh != nil {
execErr := <-execCh
selectCh <- execErr
}
if configCh != nil {
configResp := <-execConfigCh
configCh <- configResp
}
}()
return selectCh, configCh
}
type authFunc func() (continueCh chan error, completedCb chan bool, err error)
func (mcc *memdClientDialerComponent) buildAuthHandler(client bootstrapClient, auth AuthProvider, deadline time.Time,
mechanism AuthMechanism) authFunc {
creds, err := getKvAuthCreds(auth, client.Address())
if err != nil {
return nil
}
if creds.Username != "" || creds.Password != "" {
return func() (chan error, chan bool, error) {
continueCh := make(chan bool, 1)
completedCh := make(chan error, 1)
hasContinued := int32(0)
callErr := saslMethod(mechanism, creds.Username, creds.Password, client, deadline, func() {
// hasContinued should never be 1 here but let's guard against it.
if atomic.CompareAndSwapInt32(&hasContinued, 0, 1) {
continueCh <- true
}
}, func(err error) {
if atomic.CompareAndSwapInt32(&hasContinued, 0, 1) {
sendContinue := true
if err != nil {
sendContinue = false
}
continueCh <- sendContinue
}
completedCh <- err
})
if callErr != nil {
return nil, nil, callErr
}
return completedCh, continueCh, nil
}
}
return nil
}
func (mcc *memdClientDialerComponent) sendErrorToCCCPUnsupportedHandlers() {
mcc.cccpUnsupportedHandlersLock.Lock()
handlers := make([]memdBoostrapCCCPUnsupportedHandler, len(mcc.cccpUnsupportedFailHandlers))
copy(handlers, mcc.cccpUnsupportedFailHandlers)
mcc.cccpUnsupportedHandlersLock.Unlock()
for _, h := range handlers {
h.onCCCPUnsupported(ErrUnsupportedOperation)
}
}
func checkSupportsFeature(srvFeatures []memd.HelloFeature, feature memd.HelloFeature) bool {
for _, srvFeature := range srvFeatures {
if srvFeature == feature {
return true
}
}
return false
}
func findNextAuthMechanism(authMechanisms []AuthMechanism, serverAuthMechanisms []AuthMechanism) (bool, AuthMechanism, []AuthMechanism) {
for {
if len(authMechanisms) <= 1 {
break
}
authMechanisms = authMechanisms[1:]
mech := authMechanisms[0]
for _, serverMech := range serverAuthMechanisms {
if mech == serverMech {
return true, mech, authMechanisms
}
}
}
return false, "", authMechanisms
}
func helloFeatures(props helloProps) []memd.HelloFeature {
var features []memd.HelloFeature
// Send the TLS flag, which has unknown effects.
features = append(features, memd.FeatureTLS)
// Indicate that we understand XATTRs
features = append(features, memd.FeatureXattr)
// Indicates that we understand select buckets.
features = append(features, memd.FeatureSelectBucket)
// Indicates that we understand nmv responses containing no config map.
features = append(features, memd.FeatureDedupeNotMyVbucketClustermap)
// Indicates that we understand known version cluster map requests.
features = append(features, memd.FeatureClusterMapKnownVersion)
// Indicates that we understand duplex communication.
features = append(features, memd.FeatureDuplex)
// If the user wants to use KV Error maps, lets enable them
if props.XErrorFeatureEnabled {
features = append(features, memd.FeatureXerror)
}
// Indicate that we understand JSON
if props.JSONFeatureEnabled {
features = append(features, memd.FeatureJSON)
}
// Indicate that we understand Point in Time
if props.PITRFeatureEnabled {
features = append(features, memd.FeaturePITR)
}
// If the user wants to use mutation tokens, lets enable them
if props.MutationTokensEnabled {
features = append(features, memd.FeatureSeqNo)
}
// If the user wants on-the-wire compression, lets try to enable it
if props.CompressionEnabled {
features = append(features, memd.FeatureSnappy)
features = append(features, memd.FeatureSnappyEverywhere)
}
if props.DurationsEnabled {
features = append(features, memd.FeatureDurations)
}
if props.CollectionsEnabled {
features = append(features, memd.FeatureCollections)
}
if props.OutOfOrderEnabled {
features = append(features, memd.FeatureUnorderedExec)
}
if props.ClusterMapNotificationsEnabled {
features = append(features, memd.FeatureClustermapChangeNotificationBrief)
}
// These flags are informational so don't actually enable anything
features = append(features, memd.FeatureAltRequests)
features = append(features, memd.FeatureCreateAsDeleted)
features = append(features, memd.FeatureReplaceBodyWithXattr)
features = append(features, memd.FeaturePreserveExpiry)
features = append(features, memd.FeatureSubdocReplicaRead)
if props.SyncReplicationEnabled {
features = append(features, memd.FeatureSyncReplication)
}
if props.ResourceUnitsEnabled {
features = append(features, memd.FeatureResourceUnits)
}
return features
}