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
|
package topic
import (
"context"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/util/log"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
"github.com/seaweedfs/seaweedfs/weed/util/log_buffer"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"sync"
"sync/atomic"
"time"
)
type LocalPartition struct {
ListenersWaits int64
AckTsNs int64
// notifying clients
ListenersLock sync.Mutex
ListenersCond *sync.Cond
Partition
LogBuffer *log_buffer.LogBuffer
Publishers *LocalPartitionPublishers
Subscribers *LocalPartitionSubscribers
publishFolloweMeStream mq_pb.SeaweedMessaging_PublishFollowMeClient
followerGrpcConnection *grpc.ClientConn
Follower string
}
var TIME_FORMAT = "2006-01-02-15-04-05"
var PartitionGenerationFormat = "v2006-01-02-15-04-05"
func NewLocalPartition(partition Partition, logFlushFn log_buffer.LogFlushFuncType, readFromDiskFn log_buffer.LogReadFromDiskFuncType) *LocalPartition {
lp := &LocalPartition{
Partition: partition,
Publishers: NewLocalPartitionPublishers(),
Subscribers: NewLocalPartitionSubscribers(),
}
lp.ListenersCond = sync.NewCond(&lp.ListenersLock)
lp.LogBuffer = log_buffer.NewLogBuffer(fmt.Sprintf("%d/%04d-%04d", partition.UnixTimeNs, partition.RangeStart, partition.RangeStop),
2*time.Minute, logFlushFn, readFromDiskFn, func() {
if atomic.LoadInt64(&lp.ListenersWaits) > 0 {
lp.ListenersCond.Broadcast()
}
})
return lp
}
func (p *LocalPartition) Publish(message *mq_pb.DataMessage) error {
p.LogBuffer.AddToBuffer(message)
// maybe send to the follower
if p.publishFolloweMeStream != nil {
// println("recv", string(message.Key), message.TsNs)
if followErr := p.publishFolloweMeStream.Send(&mq_pb.PublishFollowMeRequest{
Message: &mq_pb.PublishFollowMeRequest_Data{
Data: message,
},
}); followErr != nil {
return fmt.Errorf("send to follower %s: %v", p.Follower, followErr)
}
} else {
atomic.StoreInt64(&p.AckTsNs, message.TsNs)
}
return nil
}
func (p *LocalPartition) Subscribe(clientName string, startPosition log_buffer.MessagePosition,
onNoMessageFn func() bool, eachMessageFn log_buffer.EachLogEntryFuncType) error {
var processedPosition log_buffer.MessagePosition
var readPersistedLogErr error
var readInMemoryLogErr error
var isDone bool
for {
processedPosition, isDone, readPersistedLogErr = p.LogBuffer.ReadFromDiskFn(startPosition, 0, eachMessageFn)
if readPersistedLogErr != nil {
log.V(3).Infof("%s read %v persisted log: %v", clientName, p.Partition, readPersistedLogErr)
return readPersistedLogErr
}
if isDone {
return nil
}
if processedPosition.Time.UnixNano() != 0 {
startPosition = processedPosition
}
processedPosition, isDone, readInMemoryLogErr = p.LogBuffer.LoopProcessLogData(clientName, startPosition, 0, onNoMessageFn, eachMessageFn)
if isDone {
return nil
}
if processedPosition.Time.UnixNano() != 0 {
startPosition = processedPosition
}
if readInMemoryLogErr == log_buffer.ResumeFromDiskError {
continue
}
if readInMemoryLogErr != nil {
log.V(3).Infof("%s read %v in memory log: %v", clientName, p.Partition, readInMemoryLogErr)
return readInMemoryLogErr
}
}
}
func (p *LocalPartition) GetEarliestMessageTimeInMemory() time.Time {
return p.LogBuffer.GetEarliestTime()
}
func (p *LocalPartition) HasData() bool {
return !p.LogBuffer.GetEarliestTime().IsZero()
}
func (p *LocalPartition) GetEarliestInMemoryMessagePosition() log_buffer.MessagePosition {
return p.LogBuffer.GetEarliestPosition()
}
func (p *LocalPartition) closePublishers() {
p.Publishers.SignalShutdown()
}
func (p *LocalPartition) closeSubscribers() {
p.Subscribers.SignalShutdown()
}
func (p *LocalPartition) WaitUntilNoPublishers() {
for {
if p.Publishers.Size() == 0 {
return
}
time.Sleep(113 * time.Millisecond)
}
}
func (p *LocalPartition) MaybeConnectToFollowers(initMessage *mq_pb.PublishMessageRequest_InitMessage, grpcDialOption grpc.DialOption) (err error) {
if p.publishFolloweMeStream != nil {
return nil
}
if initMessage.FollowerBroker == "" {
return nil
}
p.Follower = initMessage.FollowerBroker
ctx := context.Background()
p.followerGrpcConnection, err = pb.GrpcDial(ctx, p.Follower, true, grpcDialOption)
if err != nil {
return fmt.Errorf("fail to dial %s: %v", p.Follower, err)
}
followerClient := mq_pb.NewSeaweedMessagingClient(p.followerGrpcConnection)
p.publishFolloweMeStream, err = followerClient.PublishFollowMe(ctx)
if err != nil {
return fmt.Errorf("fail to create publish client: %v", err)
}
if err = p.publishFolloweMeStream.Send(&mq_pb.PublishFollowMeRequest{
Message: &mq_pb.PublishFollowMeRequest_Init{
Init: &mq_pb.PublishFollowMeRequest_InitMessage{
Topic: initMessage.Topic,
Partition: initMessage.Partition,
},
},
}); err != nil {
return err
}
// start receiving ack from follower
go func() {
defer func() {
// println("stop receiving ack from follower")
}()
for {
ack, err := p.publishFolloweMeStream.Recv()
if err != nil {
e, _ := status.FromError(err)
if e.Code() == codes.Canceled {
log.V(3).Infof("local partition %v follower %v stopped", p.Partition, p.Follower)
return
}
log.Errorf("Receiving local partition %v follower %s ack: %v", p.Partition, p.Follower, err)
return
}
atomic.StoreInt64(&p.AckTsNs, ack.AckTsNs)
// println("recv ack", ack.AckTsNs)
}
}()
return nil
}
func (p *LocalPartition) MaybeShutdownLocalPartition() (hasShutdown bool) {
if p.Publishers.Size() == 0 && p.Subscribers.Size() == 0 {
p.LogBuffer.ShutdownLogBuffer()
for !p.LogBuffer.IsAllFlushed() {
time.Sleep(113 * time.Millisecond)
}
if p.publishFolloweMeStream != nil {
// send close to the follower
if followErr := p.publishFolloweMeStream.Send(&mq_pb.PublishFollowMeRequest{
Message: &mq_pb.PublishFollowMeRequest_Close{
Close: &mq_pb.PublishFollowMeRequest_CloseMessage{},
},
}); followErr != nil {
log.Errorf("Error closing follower stream: %v", followErr)
}
log.V(-1).Infof("closing grpcConnection to follower")
p.followerGrpcConnection.Close()
p.publishFolloweMeStream = nil
p.Follower = ""
}
hasShutdown = true
}
log.V(3).Infof("local partition %v Publisher:%d Subscriber:%d follower:%s shutdown %v", p.Partition, p.Publishers.Size(), p.Subscribers.Size(), p.Follower, hasShutdown)
return
}
func (p *LocalPartition) Shutdown() {
p.closePublishers()
p.closeSubscribers()
p.LogBuffer.ShutdownLogBuffer()
log.V(3).Infof("local partition %v shutting down", p.Partition)
}
func (p *LocalPartition) NotifyLogFlushed(flushTsNs int64) {
if p.publishFolloweMeStream != nil {
if followErr := p.publishFolloweMeStream.Send(&mq_pb.PublishFollowMeRequest{
Message: &mq_pb.PublishFollowMeRequest_Flush{
Flush: &mq_pb.PublishFollowMeRequest_FlushMessage{
TsNs: flushTsNs,
},
},
}); followErr != nil {
log.Errorf("send follower %s flush message: %v", p.Follower, followErr)
}
// println("notifying", p.Follower, "flushed at", flushTsNs)
}
}
|
