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
|
package pool
import (
"sync"
json "github.com/json-iterator/go"
"github.com/spiral/roadrunner/v2/pkg/pubsub"
"github.com/spiral/roadrunner/v2/plugins/logger"
"github.com/spiral/roadrunner/v2/plugins/websockets/connection"
websocketsv1 "github.com/spiral/roadrunner/v2/proto/websockets/v1beta"
"github.com/spiral/roadrunner/v2/utils"
)
type WorkersPool struct {
subscriber pubsub.Subscriber
connections *sync.Map
resPool sync.Pool
log logger.Logger
queue chan *websocketsv1.Message
exit chan struct{}
}
// NewWorkersPool constructs worker pool for the websocket connections
func NewWorkersPool(subscriber pubsub.Subscriber, connections *sync.Map, log logger.Logger) *WorkersPool {
wp := &WorkersPool{
connections: connections,
queue: make(chan *websocketsv1.Message, 100),
subscriber: subscriber,
log: log,
exit: make(chan struct{}),
}
wp.resPool.New = func() interface{} {
return make(map[string]struct{}, 10)
}
// start 10 workers
for i := 0; i < 50; i++ {
wp.do()
}
return wp
}
func (wp *WorkersPool) Queue(msg *websocketsv1.Message) {
wp.queue <- msg
}
func (wp *WorkersPool) Stop() {
for i := 0; i < 50; i++ {
wp.exit <- struct{}{}
}
close(wp.exit)
}
func (wp *WorkersPool) put(res map[string]struct{}) {
// optimized
// https://go-review.googlesource.com/c/go/+/110055/
// not O(n), but O(1)
for k := range res {
delete(res, k)
}
}
func (wp *WorkersPool) get() map[string]struct{} {
return wp.resPool.Get().(map[string]struct{})
}
// Response from the server
type Response struct {
Topic string `json:"topic"`
Payload string `json:"payload"`
}
func (wp *WorkersPool) do() { //nolint:gocognit
go func() {
for {
select {
case msg, ok := <-wp.queue:
if !ok {
return
}
_ = msg
if msg == nil {
continue
}
if len(msg.GetTopics()) == 0 {
continue
}
// send a message to every topic
for i := 0; i < len(msg.GetTopics()); i++ {
// get free map
res := wp.get()
// get connections for the particular topic
wp.subscriber.Connections(msg.GetTopics()[i], res)
if len(res) == 0 {
wp.log.Info("no such topic", "topic", msg.GetTopics()[i])
wp.put(res)
continue
}
// res is a map with a connectionsID
for connID := range res {
c, ok := wp.connections.Load(connID)
if !ok {
wp.log.Warn("the websocket disconnected before the message being written to it", "topics", msg.GetTopics()[i])
wp.put(res)
continue
}
response := &Response{
Topic: msg.GetTopics()[i],
Payload: utils.AsString(msg.GetPayload()),
}
d, err := json.Marshal(response)
if err != nil {
wp.log.Error("error marshaling response", "error", err)
wp.put(res)
break
}
// put data into the bytes buffer
err = c.(*connection.Connection).Write(d)
if err != nil {
for i := 0; i < len(msg.GetTopics()); i++ {
wp.log.Error("error sending payload over the connection", "error", err, "topics", msg.GetTopics()[i])
}
wp.put(res)
continue
}
}
}
case <-wp.exit:
wp.log.Info("get exit signal, exiting from the workers pool")
return
}
}
}()
}
|
