-
Notifications
You must be signed in to change notification settings - Fork 49
/
streampool.go
415 lines (382 loc) · 10.5 KB
/
streampool.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
package streampool
import (
"fmt"
"sync"
"github.com/cheggaaa/mb/v3"
"go.uber.org/zap"
"golang.org/x/exp/slices"
"golang.org/x/net/context"
"storj.io/drpc"
"github.com/anyproto/any-sync/app/debugstat"
"github.com/anyproto/any-sync/net"
"github.com/anyproto/any-sync/net/peer"
)
// StreamHandler handles incoming messages from streams
type StreamHandler interface {
// OpenStream opens stream with given peer
OpenStream(ctx context.Context, p peer.Peer) (stream drpc.Stream, tags []string, err error)
// HandleMessage handles incoming message
HandleMessage(ctx context.Context, peerId string, msg drpc.Message) (err error)
// NewReadMessage creates new empty message for unmarshalling into it
NewReadMessage() drpc.Message
}
// PeerGetter should dial or return cached peers
type PeerGetter func(ctx context.Context) (peers []peer.Peer, err error)
type MessageQueueId interface {
MessageQueueId() string
DrpcMessage() drpc.Message
}
// StreamPool keeps and read streams
type StreamPool interface {
// AddStream adds new outgoing stream into the pool
AddStream(stream drpc.Stream, tags ...string) (err error)
// ReadStream adds new incoming stream and synchronously read it
ReadStream(stream drpc.Stream, tags ...string) (err error)
// Send sends a message to given peers. A stream will be opened if it is not cached before. Works async.
Send(ctx context.Context, msg drpc.Message, target PeerGetter) (err error)
// SendById sends a message to given peerIds. Works only if stream exists
SendById(ctx context.Context, msg drpc.Message, peerIds ...string) (err error)
// Broadcast sends a message to all peers with given tags. Works async.
Broadcast(ctx context.Context, msg drpc.Message, tags ...string) (err error)
// AddTagsCtx adds tags to stream, stream will be extracted from ctx
AddTagsCtx(ctx context.Context, tags ...string) error
// RemoveTagsCtx removes tags from stream, stream will be extracted from ctx
RemoveTagsCtx(ctx context.Context, tags ...string) error
// Streams gets all streams for specific tags
Streams(tags ...string) (streams []drpc.Stream)
// Close closes all streams
Close() error
}
type streamPool struct {
handler StreamHandler
statService debugstat.StatService
streamIdsByPeer map[string][]uint32
streamIdsByTag map[string][]uint32
streams map[uint32]*stream
opening map[string]*openingProcess
dial *ExecPool
mu sync.Mutex
writeQueueSize int
lastStreamId uint32
}
func (s *streamPool) ProvideStat() any {
s.mu.Lock()
var totalSize int64
var stats []streamStat
for _, st := range s.streams {
cp := st.stats
cp.TotalSize = cp.totalSize.Load()
cp.MsgCount = int(cp.msgCount.Load())
totalSize += cp.TotalSize
stats = append(stats, cp)
}
s.mu.Unlock()
slices.SortFunc(stats, func(first streamStat, second streamStat) int {
if first.TotalSize > second.TotalSize {
return -1
} else if first.TotalSize == second.TotalSize {
return 0
} else {
return 1
}
})
return streamPoolStat{
TotalSize: totalSize,
Streams: stats,
}
}
func (s *streamPool) StatId() string {
return CName
}
func (s *streamPool) StatType() string {
return CName
}
type openingProcess struct {
ch chan struct{}
err error
}
func (s *streamPool) ReadStream(drpcStream drpc.Stream, tags ...string) error {
st, err := s.addStream(drpcStream, tags...)
if err != nil {
return err
}
go func() {
st.writeLoop()
}()
return st.readLoop()
}
func (s *streamPool) AddStream(drpcStream drpc.Stream, tags ...string) error {
st, err := s.addStream(drpcStream, tags...)
if err != nil {
return err
}
go func() {
_ = st.readLoop()
}()
go func() {
st.writeLoop()
}()
return nil
}
func (s *streamPool) Streams(tags ...string) (streams []drpc.Stream) {
s.mu.Lock()
defer s.mu.Unlock()
for _, tag := range tags {
for _, id := range s.streamIdsByTag[tag] {
streams = append(streams, s.streams[id].stream)
}
}
return
}
func (s *streamPool) addStream(drpcStream drpc.Stream, tags ...string) (*stream, error) {
ctx := drpcStream.Context()
peerId, err := peer.CtxPeerId(ctx)
if err != nil {
return nil, err
}
s.mu.Lock()
defer s.mu.Unlock()
s.lastStreamId++
streamId := s.lastStreamId
queueSize := s.writeQueueSize
if queueSize <= 0 {
queueSize = 100
}
st := &stream{
peerId: peerId,
peerCtx: ctx,
stream: drpcStream,
pool: s,
streamId: streamId,
l: log.With(zap.String("peerId", peerId), zap.Uint32("streamId", streamId)),
tags: tags,
stats: newStreamStat(peerId),
}
st.queue = mb.New[drpc.Message](s.writeQueueSize)
s.streams[streamId] = st
s.streamIdsByPeer[peerId] = append(s.streamIdsByPeer[peerId], streamId)
for _, tag := range tags {
s.streamIdsByTag[tag] = append(s.streamIdsByTag[tag], streamId)
}
return st, nil
}
func (s *streamPool) Send(ctx context.Context, msg drpc.Message, peerGetter PeerGetter) (err error) {
return s.dial.TryAdd(func() {
peers, dialErr := peerGetter(ctx)
if dialErr != nil {
log.InfoCtx(ctx, "can't get peers", zap.Error(dialErr))
}
for _, p := range peers {
if e := s.sendOne(ctx, p, msg); e != nil {
log.InfoCtx(ctx, "send peer error", zap.Error(e), zap.String("peerId", p.Id()))
} else {
log.DebugCtx(ctx, "send success", zap.String("peerId", p.Id()))
}
}
})
}
func (s *streamPool) SendById(ctx context.Context, msg drpc.Message, peerIds ...string) (err error) {
s.mu.Lock()
var streamsByPeer [][]*stream
for _, peerId := range peerIds {
var streams []*stream
for _, streamId := range s.streamIdsByPeer[peerId] {
streams = append(streams, s.streams[streamId])
}
if len(streams) != 0 {
streamsByPeer = append(streamsByPeer, streams)
}
}
s.mu.Unlock()
for _, streams := range streamsByPeer {
for _, st := range streams {
if e := st.write(msg); e != nil {
st.l.Debug("sendById write error", zap.Error(e))
} else {
st.l.DebugCtx(ctx, "sendById success")
return
}
}
}
if len(streamsByPeer) == 0 {
return net.ErrUnableToConnect
}
return
}
func (s *streamPool) sendOne(ctx context.Context, p peer.Peer, msg drpc.Message) (err error) {
// get all streams relates to peer
streams, err := s.getStreams(ctx, p)
if err != nil {
return
}
for _, st := range streams {
if err = st.write(msg); err != nil {
st.l.InfoCtx(ctx, "sendOne write error", zap.Error(err), zap.Int("streams", len(streams)))
// continue with next stream
continue
} else {
st.l.DebugCtx(ctx, "sendOne success")
// stop sending on success
break
}
}
return
}
func (s *streamPool) getStreams(ctx context.Context, p peer.Peer) (streams []*stream, err error) {
s.mu.Lock()
// check cached streams
streamIds := s.streamIdsByPeer[p.Id()]
for _, streamId := range streamIds {
streams = append(streams, s.streams[streamId])
}
var op *openingProcess
// no cached streams found
if len(streams) == 0 {
// start opening process
op = s.openStream(ctx, p)
}
s.mu.Unlock()
// not empty openingCh means we should wait for the stream opening and try again
if op != nil {
select {
case <-op.ch:
if op.err != nil {
return nil, op.err
}
return s.getStreams(ctx, p)
case <-ctx.Done():
return nil, ctx.Err()
}
}
return streams, nil
}
func (s *streamPool) openStream(ctx context.Context, p peer.Peer) *openingProcess {
if op, ok := s.opening[p.Id()]; ok {
// already have an opening process for this stream - return channel
return op
}
op := &openingProcess{
ch: make(chan struct{}),
}
s.opening[p.Id()] = op
go func() {
// start stream opening in separate goroutine to avoid lock whole pool
defer func() {
s.mu.Lock()
defer s.mu.Unlock()
close(op.ch)
delete(s.opening, p.Id())
}()
// in case there was no peerId in context
ctx := peer.CtxWithPeerId(ctx, p.Id())
// open new stream and add to pool
st, tags, err := s.handler.OpenStream(ctx, p)
if err != nil {
op.err = err
return
}
if err = s.AddStream(st, tags...); err != nil {
op.err = nil
return
}
}()
return op
}
func (s *streamPool) Broadcast(ctx context.Context, msg drpc.Message, tags ...string) (err error) {
s.mu.Lock()
var streams []*stream
for _, tag := range tags {
for _, streamId := range s.streamIdsByTag[tag] {
streams = append(streams, s.streams[streamId])
}
}
s.mu.Unlock()
for _, st := range streams {
if e := st.write(msg); e != nil {
st.l.InfoCtx(ctx, "broadcast write error", zap.Error(e))
} else {
st.l.DebugCtx(ctx, "broadcast success")
}
}
return
}
func (s *streamPool) AddTagsCtx(ctx context.Context, tags ...string) error {
streamId, ok := ctx.Value(streamCtxKeyStreamId).(uint32)
if !ok {
return fmt.Errorf("context without streamId")
}
s.mu.Lock()
defer s.mu.Unlock()
st, ok := s.streams[streamId]
if !ok {
return fmt.Errorf("stream not found")
}
var newTags = make([]string, 0, len(tags))
for _, newTag := range tags {
if !slices.Contains(st.tags, newTag) {
st.tags = append(st.tags, newTag)
newTags = append(newTags, newTag)
}
}
for _, newTag := range newTags {
s.streamIdsByTag[newTag] = append(s.streamIdsByTag[newTag], streamId)
}
return nil
}
func (s *streamPool) RemoveTagsCtx(ctx context.Context, tags ...string) error {
streamId, ok := ctx.Value(streamCtxKeyStreamId).(uint32)
if !ok {
return fmt.Errorf("context without streamId")
}
s.mu.Lock()
defer s.mu.Unlock()
st, ok := s.streams[streamId]
if !ok {
return fmt.Errorf("stream not found")
}
var filtered = st.tags[:0]
var toRemove = make([]string, 0, len(tags))
for _, t := range st.tags {
if slices.Contains(tags, t) {
toRemove = append(toRemove, t)
} else {
filtered = append(filtered, t)
}
}
st.tags = filtered
for _, t := range toRemove {
removeStream(s.streamIdsByTag, t, streamId)
}
return nil
}
func (s *streamPool) removeStream(streamId uint32) {
s.mu.Lock()
defer s.mu.Unlock()
st := s.streams[streamId]
if st == nil {
log.Fatal("removeStream: stream does not exist", zap.Uint32("streamId", streamId))
}
removeStream(s.streamIdsByPeer, st.peerId, streamId)
for _, tag := range st.tags {
removeStream(s.streamIdsByTag, tag, streamId)
}
delete(s.streams, streamId)
st.l.Debug("stream removed", zap.Strings("tags", st.tags))
}
func (s *streamPool) Close() (err error) {
s.statService.RemoveProvider(s)
return s.dial.Close()
}
func removeStream(m map[string][]uint32, key string, streamId uint32) {
streamIds := m[key]
idx := slices.Index(streamIds, streamId)
if idx == -1 {
log.Fatal("removeStream: streamId does not exist", zap.Uint32("streamId", streamId))
}
streamIds = slices.Delete(streamIds, idx, idx+1)
if len(streamIds) == 0 {
delete(m, key)
} else {
m[key] = streamIds
}
}