-
Notifications
You must be signed in to change notification settings - Fork 0
/
nats_client.go
102 lines (86 loc) · 2.16 KB
/
nats_client.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
package clients
import (
"github.com/kube-tarian/git-bridge/agent/pkg/config"
"fmt"
"log"
"time"
"github.com/nats-io/nats.go"
)
//constant variables to use with nats stream and
// nats publishing
const (
streamSubjects = "GITMETRICS.*"
eventSubject = "GITMETRICS.git"
)
type NATSContext struct {
conf *config.Config
conn *nats.Conn
stream nats.JetStreamContext
}
func NewNATSContext(conf *config.Config) (*NATSContext, error) {
fmt.Println("Waiting before connecting to NATS at:", conf.NatsAddress)
time.Sleep(1 * time.Second)
conn, err := nats.Connect(conf.NatsAddress, nats.Name("Github metrics"), nats.Token(conf.NatsToken))
if err != nil {
return nil, err
}
ctx := &NATSContext{
conf: conf,
conn: conn,
}
stream, err := ctx.CreateStream()
if err != nil {
ctx.conn.Close()
return nil, err
}
ctx.stream = stream
return ctx, nil
}
func (n *NATSContext) CreateStream() (nats.JetStreamContext, error) {
// Creates JetStreamContext
stream, err := n.conn.JetStream()
if err != nil {
return nil, err
}
// Creates stream
err = n.checkNAddStream(stream)
if err != nil {
return nil, err
}
return stream, nil
}
// createStream creates a stream by using JetStreamContext
func (n *NATSContext) checkNAddStream(js nats.JetStreamContext) error {
// Check if the METRICS stream already exists; if not, create it.
stream, err := js.StreamInfo(n.conf.StreamName)
if err != nil {
log.Printf("Error getting stream %s", err)
}
log.Printf("Retrieved stream %s", fmt.Sprintf("%v", stream))
if stream == nil {
log.Printf("creating stream %q and subjects %q", n.conf.StreamName, streamSubjects)
_, err = js.AddStream(&nats.StreamConfig{
Name: n.conf.StreamName,
Subjects: []string{streamSubjects},
})
if err != nil {
log.Fatal(err)
}
}
return nil
}
func (n *NATSContext) Close() {
n.conn.Close()
}
func (n *NATSContext) Publish(event []byte, repo string) error {
// eventJSON, err := json.Marshal(event)
// if err != nil {
// return err
// }
// _, err := n.stream.Publish(eventSubject, event)
msg := nats.NewMsg(eventSubject)
msg.Data = event
msg.Header.Set("repo", repo)
_, err := n.stream.PublishMsgAsync(msg)
return err
}