A fork of the Cocoon PDS but being made more distributed.
fix cursors for new relay (#64)
+270
-2
+8
models/models.go
+8
models/models.go
+13
-1
server/handle_sync_subscribe_repos.go
+13
-1
server/handle_sync_subscribe_repos.go
···
2
2
3
3
import (
4
4
"context"
5
+
"strconv"
5
6
"time"
6
7
7
8
"github.com/bluesky-social/indigo/events"
···
27
28
logger = logger.With("ident", ident)
28
29
logger.Info("new connection established")
29
30
31
+
var since *int64
32
+
if cursorStr := e.QueryParam("cursor"); cursorStr != "" {
33
+
cursor, err := strconv.ParseInt(cursorStr, 10, 64)
34
+
if err != nil {
35
+
logger.Warn("invalid cursor parameter", "cursor", cursorStr, "err", err)
36
+
} else {
37
+
since = &cursor
38
+
logger.Info("subscribing with cursor", "cursor", cursor)
39
+
}
40
+
}
41
+
30
42
metrics.RelaysConnected.WithLabelValues(ident).Inc()
31
43
defer func() {
32
44
metrics.RelaysConnected.WithLabelValues(ident).Dec()
···
34
46
35
47
evts, evtManCancel, err := s.evtman.Subscribe(ctx, ident, func(evt *events.XRPCStreamEvent) bool {
36
48
return true
37
-
}, nil)
49
+
}, since)
38
50
if err != nil {
39
51
return err
40
52
}
+243
server/persist.go
+243
server/persist.go
···
1
+
package server
2
+
3
+
import (
4
+
"bytes"
5
+
"context"
6
+
"fmt"
7
+
"sync"
8
+
"time"
9
+
10
+
"github.com/bluesky-social/indigo/api/atproto"
11
+
"github.com/bluesky-social/indigo/events"
12
+
indigomodels "github.com/bluesky-social/indigo/models"
13
+
cbg "github.com/whyrusleeping/cbor-gen"
14
+
"gorm.io/gorm"
15
+
16
+
"github.com/haileyok/cocoon/models"
17
+
)
18
+
19
+
type DbPersister struct {
20
+
Db *gorm.DB
21
+
22
+
Lk sync.Mutex
23
+
Seq int64
24
+
25
+
Broadcast func(*events.XRPCStreamEvent)
26
+
27
+
// how long do we actually want to keep these things around
28
+
Retention time.Duration
29
+
}
30
+
31
+
func NewDbPersister(db *gorm.DB, retention time.Duration) (*DbPersister, error) {
32
+
if err := db.AutoMigrate(&models.EventRecord{}); err != nil {
33
+
return nil, fmt.Errorf("failed to migrate EventRecord: %w", err)
34
+
}
35
+
36
+
if retention == 0 {
37
+
retention = 72 * time.Hour
38
+
}
39
+
40
+
p := &DbPersister{
41
+
Db: db,
42
+
Retention: retention,
43
+
}
44
+
45
+
// kind of hacky. we will try and get the latest one from the db, but if it doesn't exist...well we have a problem
46
+
// because the relay will already have _some_ value > 0 set as a cursor, we'll want to just set this to some high value
47
+
// we'll just grab a current unix timestamp and set that as the cursor
48
+
var lastEvent models.EventRecord
49
+
if err := db.Order("seq desc").Limit(1).First(&lastEvent).Error; err != nil {
50
+
if err != gorm.ErrRecordNotFound {
51
+
return nil, fmt.Errorf("failed to get last event seq: %w", err)
52
+
}
53
+
p.Seq = time.Now().Unix()
54
+
} else {
55
+
p.Seq = lastEvent.Seq
56
+
}
57
+
58
+
go p.cleanupRoutine()
59
+
60
+
return p, nil
61
+
}
62
+
63
+
func (p *DbPersister) SetEventBroadcaster(brc func(*events.XRPCStreamEvent)) {
64
+
p.Broadcast = brc
65
+
}
66
+
67
+
func (p *DbPersister) Persist(ctx context.Context, e *events.XRPCStreamEvent) error {
68
+
p.Lk.Lock()
69
+
defer p.Lk.Unlock()
70
+
71
+
p.Seq++
72
+
seq := p.Seq
73
+
74
+
var did string
75
+
var evtType string
76
+
77
+
switch {
78
+
case e.RepoCommit != nil:
79
+
e.RepoCommit.Seq = seq
80
+
did = e.RepoCommit.Repo
81
+
evtType = "commit"
82
+
case e.RepoSync != nil:
83
+
e.RepoSync.Seq = seq
84
+
did = e.RepoSync.Did
85
+
evtType = "sync"
86
+
case e.RepoIdentity != nil:
87
+
e.RepoIdentity.Seq = seq
88
+
did = e.RepoIdentity.Did
89
+
evtType = "identity"
90
+
case e.RepoAccount != nil:
91
+
e.RepoAccount.Seq = seq
92
+
did = e.RepoAccount.Did
93
+
evtType = "account"
94
+
default:
95
+
return fmt.Errorf("unknown event type")
96
+
}
97
+
98
+
data, err := serializeEvent(e)
99
+
if err != nil {
100
+
return fmt.Errorf("failed to serialize event: %w", err)
101
+
}
102
+
103
+
rec := &models.EventRecord{
104
+
Seq: seq,
105
+
CreatedAt: time.Now(),
106
+
Did: did,
107
+
Type: evtType,
108
+
Data: data,
109
+
}
110
+
111
+
if err := p.Db.Create(rec).Error; err != nil {
112
+
return fmt.Errorf("failed to persist event: %w", err)
113
+
}
114
+
115
+
if p.Broadcast != nil {
116
+
p.Broadcast(e)
117
+
}
118
+
119
+
return nil
120
+
}
121
+
122
+
func (p *DbPersister) Playback(ctx context.Context, since int64, cb func(*events.XRPCStreamEvent) error) error {
123
+
const pageSize = 500
124
+
125
+
cursor := since
126
+
for {
127
+
var records []models.EventRecord
128
+
if err := p.Db.WithContext(ctx).
129
+
Where("seq > ?", cursor).
130
+
Order("seq asc").
131
+
Limit(pageSize).
132
+
Find(&records).Error; err != nil {
133
+
return fmt.Errorf("failed to query events: %w", err)
134
+
}
135
+
136
+
if len(records) == 0 {
137
+
return nil
138
+
}
139
+
140
+
for _, rec := range records {
141
+
evt, err := deserializeEvent(rec.Type, rec.Data)
142
+
if err != nil {
143
+
return fmt.Errorf("failed to deserialize event %d: %w", rec.Seq, err)
144
+
}
145
+
146
+
if err := cb(evt); err != nil {
147
+
return err
148
+
}
149
+
150
+
cursor = rec.Seq
151
+
}
152
+
153
+
if len(records) < pageSize {
154
+
return nil
155
+
}
156
+
}
157
+
}
158
+
159
+
func (p *DbPersister) TakeDownRepo(ctx context.Context, uid indigomodels.Uid) error {
160
+
return nil
161
+
}
162
+
163
+
func (p *DbPersister) Flush(ctx context.Context) error {
164
+
return nil
165
+
}
166
+
167
+
func (p *DbPersister) Shutdown(ctx context.Context) error {
168
+
return nil
169
+
}
170
+
171
+
func (p *DbPersister) cleanupRoutine() {
172
+
ticker := time.NewTicker(time.Hour)
173
+
defer ticker.Stop()
174
+
175
+
for range ticker.C {
176
+
cutoff := time.Now().Add(-p.Retention)
177
+
if err := p.Db.Where("created_at < ?", cutoff).Delete(&models.EventRecord{}).Error; err != nil {
178
+
continue
179
+
}
180
+
}
181
+
}
182
+
183
+
func serializeEvent(e *events.XRPCStreamEvent) ([]byte, error) {
184
+
buf := new(bytes.Buffer)
185
+
cw := cbg.NewCborWriter(buf)
186
+
187
+
switch {
188
+
case e.RepoCommit != nil:
189
+
if err := e.RepoCommit.MarshalCBOR(cw); err != nil {
190
+
return nil, err
191
+
}
192
+
case e.RepoSync != nil:
193
+
if err := e.RepoSync.MarshalCBOR(cw); err != nil {
194
+
return nil, err
195
+
}
196
+
case e.RepoIdentity != nil:
197
+
if err := e.RepoIdentity.MarshalCBOR(cw); err != nil {
198
+
return nil, err
199
+
}
200
+
case e.RepoAccount != nil:
201
+
if err := e.RepoAccount.MarshalCBOR(cw); err != nil {
202
+
return nil, err
203
+
}
204
+
default:
205
+
return nil, fmt.Errorf("unknown event type")
206
+
}
207
+
208
+
return buf.Bytes(), nil
209
+
}
210
+
211
+
func deserializeEvent(evtType string, data []byte) (*events.XRPCStreamEvent, error) {
212
+
r := bytes.NewReader(data)
213
+
cr := cbg.NewCborReader(r)
214
+
215
+
switch evtType {
216
+
case "commit":
217
+
evt := &atproto.SyncSubscribeRepos_Commit{}
218
+
if err := evt.UnmarshalCBOR(cr); err != nil {
219
+
return nil, err
220
+
}
221
+
return &events.XRPCStreamEvent{RepoCommit: evt}, nil
222
+
case "sync":
223
+
evt := &atproto.SyncSubscribeRepos_Sync{}
224
+
if err := evt.UnmarshalCBOR(cr); err != nil {
225
+
return nil, err
226
+
}
227
+
return &events.XRPCStreamEvent{RepoSync: evt}, nil
228
+
case "identity":
229
+
evt := &atproto.SyncSubscribeRepos_Identity{}
230
+
if err := evt.UnmarshalCBOR(cr); err != nil {
231
+
return nil, err
232
+
}
233
+
return &events.XRPCStreamEvent{RepoIdentity: evt}, nil
234
+
case "account":
235
+
evt := &atproto.SyncSubscribeRepos_Account{}
236
+
if err := evt.UnmarshalCBOR(cr); err != nil {
237
+
return nil, err
238
+
}
239
+
return &events.XRPCStreamEvent{RepoAccount: evt}, nil
240
+
default:
241
+
return nil, fmt.Errorf("unknown event type: %s", evtType)
242
+
}
243
+
}
+6
-1
server/server.go
+6
-1
server/server.go
···
405
405
nonceSecret = maybeSecret
406
406
}
407
407
408
+
evtPersister, err := NewDbPersister(gdb, 72*time.Hour)
409
+
if err != nil {
410
+
return nil, fmt.Errorf("failed to create event persister: %w", err)
411
+
}
412
+
408
413
s := &Server{
409
414
http: h,
410
415
httpd: httpd,
···
429
434
BlockstoreVariant: args.BlockstoreVariant,
430
435
FallbackProxy: args.FallbackProxy,
431
436
},
432
-
evtman: events.NewEventManager(events.NewMemPersister()),
437
+
evtman: events.NewEventManager(evtPersister),
433
438
passport: identity.NewPassport(h, identity.NewMemCache(10_000)),
434
439
435
440
dbName: args.DbName,