This repository has no description
feat: actually working jetstream connection, typescript sender mock script
author
Ewen Le Bihan
date
(Oct 29, 2024, 8:29 PM +0100)
commit
8cd96e7f
8cd96e7ffb2ce544ce6cf8eb4168bf60892bb251
parent
ade06b81
ade06b810a4861ad2a6ad586e330800d108f272b
+658
-30
+3
docker-compose.yaml
+3
docker-compose.yaml
-1
go.mod
-1
go.mod
-2
go.sum
-2
go.sum
···
73
73
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
74
74
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
75
75
golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
76
-
golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
77
-
golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
78
76
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
79
77
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+528
-2
package-lock.json
+528
-2
package-lock.json
···
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"optional": true,
400
+
"os": [
401
+
"win32"
402
+
],
403
+
"engines": {
404
+
"node": ">=18"
405
+
}
406
+
},
407
+
"node_modules/@esbuild/win32-x64": {
408
+
"version": "0.23.1",
409
+
"resolved": "https://registry.npmjs.org/@esbuild/win32-x64/-/win32-x64-0.23.1.tgz",
410
+
"integrity": "sha512-BHpFFeslkWrXWyUPnbKm+xYYVYruCinGcftSBaa8zoF9hZO4BcSCFUvHVTtzpIY6YzUnYtuEhZ+C9iEXjxnasg==",
411
+
"cpu": [
412
+
"x64"
413
+
],
414
+
"dev": true,
415
+
"license": "MIT",
416
+
"optional": true,
417
+
"os": [
418
+
"win32"
419
+
],
420
+
"engines": {
421
+
"node": ">=18"
12
422
}
13
423
},
14
424
"node_modules/@prisma/client": {
···
73
483
"@prisma/debug": "5.20.0"
74
484
}
75
485
},
486
+
"node_modules/esbuild": {
487
+
"version": "0.23.1",
488
+
"resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.23.1.tgz",
489
+
"integrity": "sha512-VVNz/9Sa0bs5SELtn3f7qhJCDPCF5oMEl5cO9/SSinpE9hbPVvxbd572HH5AKiP7WD8INO53GgfDDhRjkylHEg==",
490
+
"dev": true,
491
+
"hasInstallScript": true,
492
+
"license": "MIT",
493
+
"bin": {
494
+
"esbuild": "bin/esbuild"
495
+
},
496
+
"engines": {
497
+
"node": ">=18"
498
+
},
499
+
"optionalDependencies": {
500
+
"@esbuild/aix-ppc64": "0.23.1",
501
+
"@esbuild/android-arm": "0.23.1",
502
+
"@esbuild/android-arm64": "0.23.1",
503
+
"@esbuild/android-x64": "0.23.1",
504
+
"@esbuild/darwin-arm64": "0.23.1",
505
+
"@esbuild/darwin-x64": "0.23.1",
506
+
"@esbuild/freebsd-arm64": "0.23.1",
507
+
"@esbuild/freebsd-x64": "0.23.1",
508
+
"@esbuild/linux-arm": "0.23.1",
509
+
"@esbuild/linux-arm64": "0.23.1",
510
+
"@esbuild/linux-ia32": "0.23.1",
511
+
"@esbuild/linux-loong64": "0.23.1",
512
+
"@esbuild/linux-mips64el": "0.23.1",
513
+
"@esbuild/linux-ppc64": "0.23.1",
514
+
"@esbuild/linux-riscv64": "0.23.1",
515
+
"@esbuild/linux-s390x": "0.23.1",
516
+
"@esbuild/linux-x64": "0.23.1",
517
+
"@esbuild/netbsd-x64": "0.23.1",
518
+
"@esbuild/openbsd-arm64": "0.23.1",
519
+
"@esbuild/openbsd-x64": "0.23.1",
520
+
"@esbuild/sunos-x64": "0.23.1",
521
+
"@esbuild/win32-arm64": "0.23.1",
522
+
"@esbuild/win32-ia32": "0.23.1",
523
+
"@esbuild/win32-x64": "0.23.1"
524
+
}
525
+
},
76
526
"node_modules/fsevents": {
77
527
"version": "2.3.3",
78
528
"resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
···
87
537
"node": "^8.16.0 || ^10.6.0 || >=11.0.0"
88
538
}
89
539
},
540
+
"node_modules/get-tsconfig": {
541
+
"version": "4.8.1",
542
+
"resolved": "https://registry.npmjs.org/get-tsconfig/-/get-tsconfig-4.8.1.tgz",
543
+
"integrity": "sha512-k9PN+cFBmaLWtVz29SkUoqU5O0slLuHJXt/2P+tMVFT+phsSGXGkp9t3rQIqdz0e+06EHNGs3oM6ZX1s2zHxRg==",
544
+
"dev": true,
545
+
"license": "MIT",
546
+
"dependencies": {
547
+
"resolve-pkg-maps": "^1.0.0"
548
+
},
549
+
"funding": {
550
+
"url": "https://github.com/privatenumber/get-tsconfig?sponsor=1"
551
+
}
552
+
},
553
+
"node_modules/nats": {
554
+
"version": "2.28.2",
555
+
"resolved": "https://registry.npmjs.org/nats/-/nats-2.28.2.tgz",
556
+
"integrity": "sha512-02cvR8EPach+0BfVaQjPgsbPFn6uMjEQAuvXS2ppg8jiWEm2KYdfmeFmtshiU9b2+kFh3LSEKMEaIfRgk3K8tw==",
557
+
"dev": true,
558
+
"license": "Apache-2.0",
559
+
"dependencies": {
560
+
"nkeys.js": "1.1.0"
561
+
},
562
+
"engines": {
563
+
"node": ">= 14.0.0"
564
+
}
565
+
},
566
+
"node_modules/nkeys.js": {
567
+
"version": "1.1.0",
568
+
"resolved": "https://registry.npmjs.org/nkeys.js/-/nkeys.js-1.1.0.tgz",
569
+
"integrity": "sha512-tB/a0shZL5UZWSwsoeyqfTszONTt4k2YS0tuQioMOD180+MbombYVgzDUYHlx+gejYK6rgf08n/2Df99WY0Sxg==",
570
+
"dev": true,
571
+
"license": "Apache-2.0",
572
+
"dependencies": {
573
+
"tweetnacl": "1.0.3"
574
+
},
575
+
"engines": {
576
+
"node": ">=10.0.0"
577
+
}
578
+
},
90
579
"node_modules/prisma": {
91
580
"version": "5.20.0",
92
581
"resolved": "https://registry.npmjs.org/prisma/-/prisma-5.20.0.tgz",
···
105
594
"optionalDependencies": {
106
595
"fsevents": "2.3.3"
107
596
}
597
+
},
598
+
"node_modules/resolve-pkg-maps": {
599
+
"version": "1.0.0",
600
+
"resolved": "https://registry.npmjs.org/resolve-pkg-maps/-/resolve-pkg-maps-1.0.0.tgz",
601
+
"integrity": "sha512-seS2Tj26TBVOC2NIc2rOe2y2ZO7efxITtLZcGSOnHHNOQ7CkiUBfw0Iw2ck6xkIhPwLhKNLS8BO+hEpngQlqzw==",
602
+
"dev": true,
603
+
"license": "MIT",
604
+
"funding": {
605
+
"url": "https://github.com/privatenumber/resolve-pkg-maps?sponsor=1"
606
+
}
607
+
},
608
+
"node_modules/tsx": {
609
+
"version": "4.19.2",
610
+
"resolved": "https://registry.npmjs.org/tsx/-/tsx-4.19.2.tgz",
611
+
"integrity": "sha512-pOUl6Vo2LUq/bSa8S5q7b91cgNSjctn9ugq/+Mvow99qW6x/UZYwzxy/3NmqoT66eHYfCVvFvACC58UBPFf28g==",
612
+
"dev": true,
613
+
"license": "MIT",
614
+
"dependencies": {
615
+
"esbuild": "~0.23.0",
616
+
"get-tsconfig": "^4.7.5"
617
+
},
618
+
"bin": {
619
+
"tsx": "dist/cli.mjs"
620
+
},
621
+
"engines": {
622
+
"node": ">=18.0.0"
623
+
},
624
+
"optionalDependencies": {
625
+
"fsevents": "~2.3.3"
626
+
}
627
+
},
628
+
"node_modules/tweetnacl": {
629
+
"version": "1.0.3",
630
+
"resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-1.0.3.tgz",
631
+
"integrity": "sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==",
632
+
"dev": true,
633
+
"license": "Unlicense"
108
634
}
109
635
}
110
636
}
+3
-1
package.json
+3
-1
package.json
+4
-3
receiver.go
+4
-3
receiver.go
···
1
1
package notella
2
2
3
3
import (
4
-
"github.com/nats-io/nats.go/jetstream"
4
+
ll "github.com/ewen-lbh/label-logger-go"
5
+
"github.com/nats-io/nats.go"
5
6
)
6
7
7
-
func NatsReceiver(m jetstream.Msg) {
8
-
8
+
func NatsReceiver(m *nats.Msg) {
9
+
ll.Log("Received", "cyan", "message: %s", string(m.Data))
9
10
}
+62
scripts/mocksender.ts
+62
scripts/mocksender.ts
···
1
+
import { connect, StringCodec, JetStreamManager, NatsConnection } from "nats"
2
+
3
+
async function setupStream(
4
+
jetStreamManager: JetStreamManager,
5
+
streamName: string,
6
+
subject: string
7
+
) {
8
+
try {
9
+
// Try to add the stream (will not recreate if it exists)
10
+
await jetStreamManager.streams.add({
11
+
name: streamName,
12
+
subjects: [subject],
13
+
})
14
+
console.log(`Stream '${streamName}' created or already exists.`)
15
+
} catch (err) {
16
+
console.error(`Error setting up stream: ${err.message}`)
17
+
}
18
+
}
19
+
20
+
async function publishMessages(
21
+
nc: NatsConnection,
22
+
subject: string,
23
+
messageCount: number,
24
+
delayMs: number
25
+
) {
26
+
const js = nc.jetstream()
27
+
const sc = StringCodec()
28
+
29
+
for (let i = 1; i <= messageCount; i++) {
30
+
const message = `Mock Order #${i}`
31
+
await js.publish(subject, sc.encode(message))
32
+
console.log(`Sent message: ${message}`)
33
+
await new Promise((resolve) => setTimeout(resolve, delayMs))
34
+
}
35
+
}
36
+
37
+
async function main() {
38
+
const streamName = "notella:stream"
39
+
const subject = "notella:notification"
40
+
41
+
// Connect to the NATS server
42
+
const nc = await connect({ servers: "localhost:4222" })
43
+
console.log("Connected to NATS")
44
+
45
+
// Create a JetStream manager to manage streams
46
+
const jsm = await nc.jetstreamManager()
47
+
48
+
// Ensure the stream exists
49
+
await setupStream(jsm, streamName, subject)
50
+
51
+
// Publish messages at intervals
52
+
const messageCount = 20
53
+
const delayMs = 1000 // 1 second delay between messages
54
+
await publishMessages(nc, subject, messageCount, delayMs)
55
+
56
+
console.log("Finished sending messages.")
57
+
await nc.close()
58
+
}
59
+
60
+
main().catch((err) => {
61
+
console.error(`Error in sender: ${err.message}`)
62
+
})
+54
-21
server/main.go
+54
-21
server/main.go
···
5
5
import (
6
6
"context"
7
7
"fmt"
8
+
"log"
8
9
"os"
9
10
"os/signal"
10
11
"syscall"
···
16
17
ll "github.com/ewen-lbh/label-logger-go"
17
18
"github.com/joho/godotenv"
18
19
"github.com/nats-io/nats.go"
19
-
"github.com/nats-io/nats.go/jetstream"
20
20
)
21
21
22
22
type Configuration struct {
···
28
28
}
29
29
30
30
var Version = "DEV"
31
+
32
+
const StreamName = "notella:stream"
33
+
const SubjectName = "notella:notification"
31
34
32
35
func main() {
33
36
figure.NewColorFigure("Notella", "", "yellow", true).Print()
···
66
69
return
67
70
}
68
71
69
-
ctx, cancel := context.WithTimeout(context.Background(), 30 * time.Second)
70
-
defer cancel()
71
-
72
-
js, err := jetstream.New(nc)
72
+
js, err := nc.JetStream()
73
73
if err != nil {
74
74
ll.ErrorDisplay("could not connect to Jetstream", err)
75
75
return
76
76
}
77
77
78
-
ll.Log("Initializing", "cyan", "a Jetstream stream [bold]notella:stream[reset], listening for [bold]notella:*[reset] subjects")
78
+
ll.Log("Initializing", "cyan", "a Jetstream stream [bold]%s[reset], listening for subject [bold]%s[reset]", StreamName, SubjectName)
79
79
80
-
s, err := js.CreateStream(ctx, jetstream.StreamConfig{
81
-
Name: "notella:stream",
82
-
Subjects: []string{"notella:*"},
80
+
_, err = js.AddStream(&nats.StreamConfig{
81
+
Name: StreamName,
82
+
Subjects: []string{SubjectName},
83
83
})
84
84
if err != nil {
85
85
ll.ErrorDisplay("could not create stream", err)
···
88
88
89
89
ll.Log("Initializing", "cyan", "Jetstream consumer [bold]NotellaConsumer[reset] with [bold]AckExplicitPolicy[reset]")
90
90
91
-
cons, err := s.CreateOrUpdateConsumer(ctx, jetstream.ConsumerConfig{
91
+
_, err = js.AddConsumer(StreamName, &nats.ConsumerConfig{
92
92
Durable: "NotellaConsumer",
93
-
AckPolicy: jetstream.AckExplicitPolicy,
93
+
AckPolicy: nats.AckExplicitPolicy,
94
94
})
95
95
if err != nil {
96
96
ll.ErrorDisplay("could not create consumer", err)
···
99
99
100
100
ll.Log("Starting", "cyan", "consumer [bold]NotellaConsumer[reset]")
101
101
102
-
cc, err := cons.Consume(func(msg jetstream.Msg) {
103
-
fmt.Println(string(msg.Data()))
104
-
msg.Ack()
105
-
}, jetstream.ConsumeErrHandler(func(consumeCtx jetstream.ConsumeContext, err error) {
106
-
fmt.Println(err)
107
-
}))
102
+
sub, err := js.PullSubscribe(SubjectName, "NotellaConsumer")
108
103
if err != nil {
109
104
ll.ErrorDisplay("could not start consumer", err)
110
105
return
111
106
}
112
-
defer cc.Stop()
107
+
108
+
// Setup a context to handle graceful shutdowns
109
+
ctx, cancel := context.WithCancel(context.Background())
110
+
defer cancel()
111
+
112
+
// Capture OS signals for graceful shutdown
113
+
go func() {
114
+
sigChan := make(chan os.Signal, 1)
115
+
signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
116
+
<-sigChan
117
+
log.Println("Received shutdown signal, shutting down...")
118
+
cancel()
119
+
}()
120
+
121
+
// Continuously fetch and process messages
122
+
go func() {
123
+
for {
124
+
select {
125
+
case <-ctx.Done():
126
+
return
127
+
default:
128
+
// Fetch messages in batches
129
+
msgs, err := sub.Fetch(10, nats.MaxWait(5*time.Second))
130
+
if err != nil && err != nats.ErrTimeout {
131
+
log.Printf("Error fetching messages: %v", err)
132
+
time.Sleep(2 * time.Second) // Wait before retrying
133
+
continue
134
+
}
113
135
114
-
sig := make(chan os.Signal, 1)
115
-
signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
116
-
<-sig
136
+
// Process each message
137
+
for _, msg := range msgs {
138
+
log.Printf("Processing message: %s", string(msg.Data))
139
+
// Simulate notification scheduling
140
+
notella.NatsReceiver(msg)
141
+
msg.Ack() // Acknowledge the message
142
+
}
143
+
}
144
+
}
145
+
}()
146
+
147
+
// Block until the context is canceled (i.e., server shutdown signal received)
148
+
<-ctx.Done()
149
+
log.Println("Server stopped.")
117
150
}