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How to use NewNATSBus method of bus Package

Best Testkube code snippet using bus.NewNATSBus

bus_manager.go

Source:bus_manager.go

1package channelling2import (3	"errors"4	"fmt"5	"log"6	"sync"7	"time"8	"github.com/nats-io/nats"9	"natsconnection"10)11const (12	BusManagerStartup    = "startup"13	BusManagerOffer      = "offer"14	BusManagerAnswer     = "answer"15	BusManagerBye        = "bye"16	BusManagerConnect    = "connect"17	BusManagerDisconnect = "disconnect"18	BusManagerSession    = "session"19)20// BusManager æä¾äºä¸ æ¶æ¯æ»çº¿è¿è¡éä¿¡çAPI.21type BusManager interface {22	ChannellingAPIConsumer23	Start()24	Publish(subject string, v interface{}) error25	Request(subject string, v interface{}, vPtr interface{}, timeout time.Duration) error26	Trigger(name, from, payload string, data interface{}, pipeline *Pipeline) error27	Subscribe(subject string, cb nats.Handler) (*nats.Subscription, error)28	BindRecvChan(subject string, channel interface{}) (*nats.Subscription, error)29	BindSendChan(subject string, channel interface{}) error30	PrefixSubject(string) string31	CreateSink(string) Sink32}33// BusTrigger ä½ä¸ºåºåå åç«¯ç³»ç»æ»çº¿ trigger äºä»¶çå®¹å¨.34type BusTrigger struct {35	Id       string36	Name     string37	From     string38	Payload  string      `json:",omitempty"`39	Data     interface{} `json:",omitempty"`40	Pipeline string      `json:",omitempty"`41}42// BusSubjectTrigger è¿å trigger payloads çæ¶æ¯ä¸»é¢åç§°.43func BusSubjectTrigger(prefix, suffix string) string {44	return fmt.Sprintf("%s.%s", prefix, suffix)45}46// NewBusManager åå»ºååå§åä¸ä¸ªæ°ç BusManager, æ ¹æ® useNatså¼å³å³å®æ¯å¦ä½¿ç¨ NATS.47// ç®çæ¯ä¸ºäºç®åAPI, å°è£ä¸åç«¯æ¶æ¯æ»çº¿è¿è¡è¿æ¥åæ¶åæ°æ®çé»è¾.48func NewBusManager(apiConsumer ChannellingAPIConsumer, id string, useNats bool, subjectPrefix string) BusManager {49	var b BusManager50	var err error51	if useNats {52		b, err = newNatsBus(apiConsumer, id, subjectPrefix)53		if err == nil {54			log.Println("NATS bus connected")55		} else {56			log.Println("Error connecting NATS bus", err)57			b = &noopBus{apiConsumer, id}58		}59	} else {60		b = &noopBus{apiConsumer, id}61	}62	return b63}64type noopBus struct {65	ChannellingAPIConsumer66	id string67}68func (bus *noopBus) Start() {69	// noop70}71func (bus *noopBus) Publish(subject string, v interface{}) error {72	return nil73}74func (bus *noopBus) Request(subject string, v interface{}, vPtr interface{}, timeout time.Duration) error {75	return nil76}77func (bus *noopBus) Trigger(name, from, payload string, data interface{}, pipeline *Pipeline) error {78	return nil79}80func (bus *noopBus) PrefixSubject(subject string) string {81	return subject82}83func (bus *noopBus) BindRecvChan(subject string, channel interface{}) (*nats.Subscription, error) {84	return nil, nil85}86func (bus *noopBus) BindSendChan(subject string, channel interface{}) error {87	return nil88}89func (bus *noopBus) Subscribe(subject string, cb nats.Handler) (*nats.Subscription, error) {90	return nil, nil91}92func (bus *noopBus) CreateSink(id string) Sink {93	return nil94}95type natsBus struct {96	ChannellingAPIConsumer97	id           string98	prefix       string99	ec           *natsconnection.EncodedConnection100	triggerQueue chan *busQueueEntry101}102func newNatsBus(apiConsumer ChannellingAPIConsumer, id, prefix string) (*natsBus, error) {103	ec, err := natsconnection.EstablishJSONEncodedConnection(nil)104	if err != nil {105		return nil, err106	}107	if prefix == "" {108		prefix = "channelling.trigger"109	}110	// Create buffered channel for outbound NATS data.111	triggerQueue := make(chan *busQueueEntry, 50)112	return &natsBus{apiConsumer, id, prefix, ec, triggerQueue}, nil113}114func (bus *natsBus) Start() {115	// Start go routine to process outbount NATS publishing.116	go chPublish(bus.ec, bus.triggerQueue)117	bus.Trigger(BusManagerStartup, bus.id, "", nil, nil)118}119func (bus *natsBus) Publish(subject string, v interface{}) error {120	return bus.ec.Publish(subject, v)121}122func (bus *natsBus) Request(subject string, v interface{}, vPtr interface{}, timeout time.Duration) error {123	return bus.ec.Request(subject, v, vPtr, timeout)124}125func (bus *natsBus) Trigger(name, from, payload string, data interface{}, pipeline *Pipeline) (err error) {126	trigger := &BusTrigger{127		Id:      bus.id,128		Name:    name,129		From:    from,130		Payload: payload,131		Data:    data,132	}133	if pipeline != nil {134		trigger.Pipeline = pipeline.GetID()135	}136	entry := &busQueueEntry{BusSubjectTrigger(bus.prefix, name), trigger}137	select {138	case bus.triggerQueue <- entry:139		// sent ok140	default:141		log.Println("Failed to queue NATS event - queue full?")142		err = errors.New("NATS trigger queue full")143	}144	return err145}146func (bus *natsBus) PrefixSubject(sub string) string {147	return fmt.Sprintf("%s.%s", bus.prefix, sub)148}149func (bus *natsBus) Subscribe(subject string, cb nats.Handler) (*nats.Subscription, error) {150	return bus.ec.Subscribe(subject, cb)151}152func (bus *natsBus) BindRecvChan(subject string, channel interface{}) (*nats.Subscription, error) {153	return bus.ec.BindRecvChan(subject, channel)154}155func (bus *natsBus) BindSendChan(subject string, channel interface{}) error {156	return bus.ec.BindSendChan(subject, channel)157}158func (bus *natsBus) CreateSink(id string) (sink Sink) {159	sink = newNatsSink(bus, id)160	return161}162type busQueueEntry struct {163	subject string164	data    interface{}165}166func chPublish(ec *natsconnection.EncodedConnection, channel chan (*busQueueEntry)) {167	for {168		entry := <-channel169		err := ec.Publish(entry.subject, entry.data)170		if err != nil {171			log.Println("Failed to publish to NATS", entry.subject, err)172		}173	}174}175type natsSink struct {176	sync.RWMutex177	id         string178	bm         BusManager179	closed     bool180	SubjectOut string181	SubjectIn  string182	sub        *nats.Subscription183	sendQueue  chan *DataSinkOutgoing184}185func newNatsSink(bm BusManager, id string) *natsSink {186	sink := &natsSink{187		id:         id,188		bm:         bm,189		SubjectOut: bm.PrefixSubject(fmt.Sprintf("sink.%s.out", id)),190		SubjectIn:  bm.PrefixSubject(fmt.Sprintf("sink.%s.in", id)),191	}192	sink.sendQueue = make(chan *DataSinkOutgoing, 100)193	bm.BindSendChan(sink.SubjectOut, sink.sendQueue)194	return sink195}196func (sink *natsSink) Write(outgoing *DataSinkOutgoing) (err error) {197	if sink.Enabled() {198		log.Println("Sending via NATS sink", sink.SubjectOut, outgoing)199		sink.sendQueue <- outgoing200	}201	return err202}203func (sink *natsSink) Enabled() bool {204	sink.RLock()205	defer sink.RUnlock()206	return sink.closed == false207}208func (sink *natsSink) Close() {209	sink.Lock()210	defer sink.Unlock()211	if sink.sub != nil {212		err := sink.sub.Unsubscribe()213		if err != nil {214			log.Println("Failed to unsubscribe NATS sink", err)215		} else {216			sink.sub = nil217		}218	}219	sink.closed = true220}221func (sink *natsSink) Export() *DataSink {222	return &DataSink{223		SubjectOut: sink.SubjectOut,224		SubjectIn:  sink.SubjectIn,225	}226}227func (sink *natsSink) BindRecvChan(channel interface{}) (*nats.Subscription, error) {228	sink.Lock()229	defer sink.Unlock()230	if sink.sub != nil {231		sink.sub.Unsubscribe()232		sink.sub = nil233	}234	sub, err := sink.bm.BindRecvChan(sink.SubjectIn, channel)235	if err != nil {236		return nil, err237	}238	sink.sub = sub239	return sub, nil240}...

NewNATSBus

Using AI Code Generation

1import (2type Service interface {3	SayHello(context.Context, *HelloRequest) (*HelloResponse, error)4}5type HelloRequest struct {6}7type HelloResponse struct {8}9type HelloService struct{}10func (s *HelloService) SayHello(ctx context.Context, req *HelloRequest) (*HelloResponse, error) {11	if req.Name == "" {12		return nil, rpc.NewError(codes.InvalidArgument, "name is required")13	}14	return &HelloResponse{Greeting: fmt.Sprintf("Hello %s", req.Name)}, nil15}16func (s *HelloService) SayHelloAgain(ctx context.Context, req *HelloRequest) (*HelloResponse, error) {17	if req.Name == "" {18		return nil, rpc.NewError(codes.InvalidArgument, "name is required")19	}20	return &HelloResponse{Greeting: fmt.Sprintf("Hello again %s", req.Name)}, nil21}22func (s *HelloService) SayHelloAgainAgain(ctx context.Context, req *HelloRequest) (*HelloResponse, error) {23	if req.Name == "" {24		return nil, rpc.NewError(codes.InvalidArgument, "name is required")25	}26	return &HelloResponse{Greeting: fmt.Sprintf("Hello again again %s", req.Name)}, nil27}28func main() {

NewNATSBus

Using AI Code Generation

1import (2func main() {3	cmd.Init()4	b := nats.NewBroker()5	if err := b.Init(); err != nil {6		log.Fatal(err)7	}8	if err := b.Connect(); err != nil {9		log.Fatal(err)10	}11	if err := b.Publish("go.micro.topic.foo", &broker.Message{12		Header: map[string]string{13		},14		Body: []byte("Hello World"),15	}); err != nil {16		log.Fatal(err)17	}18	_, err := b.Subscribe("go.micro.topic.foo", func(p broker.Event) error {19		fmt.Printf("[sub] Received message: %s\n", string(p.Message().Body))20	})21	if err != nil {22		log.Fatal(err)23	}24	select {}25}26import (27func main() {28	cmd.Init()29	b := nats.NewNATSStreamingBroker(30		nats.NATSClusterID("test-cluster"),

NewNATSBus

Using AI Code Generation

1import (2func main() {3	if err != nil {4		log.Fatal(err)5	}6	err = natsBus.Connect()7	if err != nil {8		log.Fatal(err)9	}10	err = natsBus.Publish("test", []byte("Hello World"))11	if err != nil {12		log.Fatal(err)13	}14	natsBus.Subscribe("test", func(msg *bus.Message) {15		fmt.Println("Received a message: ", string(msg.Data))16	})17	select {}18}19import (20func main() {21	if err != nil {22		log.Fatal(err)23	}24	err = natsBus.Connect()25	if err != nil {26		log.Fatal(err)27	}28	err = natsBus.Publish("test", []byte("Hello World"))29	if err != nil {30		log.Fatal(err)31	}32	natsBus.Subscribe("test", func(msg *bus.Message) {33		fmt.Println("Received a message: ", string(msg.Data))34	})35	select {}36}37import (38func main() {39	if err != nil {40		log.Fatal(err)41	}42	err = natsBus.Connect()43	if err != nil {44		log.Fatal(err)45	}46	err = natsBus.Publish("test", []byte("Hello World"))47	if err != nil {48		log.Fatal(err)49	}50	natsBus.Subscribe("test", func(msg *bus.Message) {51		fmt.Println("Received a message: ", string(msg.Data))52	})53	select {}54}55import (

NewNATSBus

Using AI Code Generation

1import (2func main() {3	bus := golbus.NewNATSBus()4	bus.Connect()5	bus.Publish("test", "Hello World!")6	bus.Subscribe("test", func(msg string) {7		fmt.Println("Received a message: ", msg)8	})9	bus.Disconnect()10}11import (12func main() {13	bus := golbus.NewRedisBus()14	bus.Connect()15	bus.Publish("test", "Hello World!")16	bus.Subscribe("test", func(msg string) {17		fmt.Println("Received a message: ", msg)18	})19	bus.Disconnect()20}21import (22func main() {23	bus := golbus.NewZeroMQBus()24	bus.Connect()25	bus.Publish("test", "Hello World!")26	bus.Subscribe("test", func(msg string) {27		fmt.Println("Received a message: ", msg)28	})29	bus.Disconnect()30}31import (32func main() {33	bus := golbus.NewKafkaBus()34	bus.Connect()35	bus.Publish("test", "Hello World!")36	bus.Subscribe("test", func(msg string) {37		fmt.Println("Received a message: ", msg)38	})39	bus.Disconnect()40}41import (42func main() {43	bus := golbus.NewAMQPBus()44	bus.Connect()45	bus.Publish("test", "Hello World!")46	bus.Subscribe("test", func(msg string) {47		fmt.Println("Received a message: ", msg)48	})49	bus.Disconnect()50}51import (

NewNATSBus

Using AI Code Generation

1func main() {2    bus := bus.NewNATSBus()3    bus.Connect("localhost", 4222)4    bus.Subscribe("foo", func(msg *bus.Message) {5        fmt.Printf("Received a message: %s\n", string(msg.Data))6    })7    bus.Publish("foo", []byte("Hello World"))8    bus.Disconnect()9}10func main() {11    bus := bus.NewNATSStreamingBus()12    bus.Subscribe("foo", func(msg *bus.Message) {13        fmt.Printf("Received a message: %s\n", string(msg.Data))14    })15    bus.Publish("foo", []byte("Hello World"))16    bus.Disconnect()17}18func main() {19    bus := bus.NewKafkaBus()20    bus.Connect([]string{"localhost:9092"})21    bus.Subscribe("foo", func(msg *bus.Message) {22        fmt.Printf("Received a message: %s\n", string(msg.Data))23    })24    bus.Publish("foo", []byte("Hello World"))25    bus.Disconnect()26}27func main() {28    bus := bus.NewRabbitMQBus()

NewNATSBus

Using AI Code Generation

1func main() {2  var (3    ctx = context.Background()4  b := bus.NewNATSBus()5  if err = b.Connect(ctx); err != nil {6    panic(err)7  }8  defer b.Close()9  s := bus.NewSubscriber(b)10  s.RegisterHandler("test", func(msg *bus.Message) error {11    fmt.Printf("received message: %s\n", msg.Data)12  })13  if err = s.Subscribe(ctx, "test"); err != nil {14    panic(err)15  }16  p := bus.NewPublisher(b)17  if err = p.Publish(ctx, "test", []byte("hello world")); err != nil {18    panic(err)19  }20  time.Sleep(time.Second)21}22Please see [examples](

NewNATSBus

Using AI Code Generation

1import (2func main() {3	b := bus.NewNATSBus("localhost:4222")4	b.Publish("test", []byte("Hello World"))5	b.Subscribe("test", func(m []byte) {6		fmt.Println(string(m))7	})8	b.Wait()9}10import (11func main() {12	b := bus.NewNATSBus("localhost:4222")13	b.Subscribe("test", func(m []byte) {14		fmt.Println(string(m))15	})16	b.Wait()17}18import (19func main() {20	b := bus.NewNATSBus("localhost:4222")21	b.Subscribe("test", func(m []byte) {22		fmt.Println(string(m))23	})24	b.Wait()25}26import (27func main() {28	b := bus.NewNATSBus("localhost:4222")29	b.Publish("test", []byte("Hello World"))30	b.Subscribe("test", func(m []byte) {31		fmt.Println(string(m))32	})33	b.Wait()34}35import (36func main() {37	b := bus.NewNATSBus("localhost

NewNATSBus

Using AI Code Generation

1import (2func main() {3	bus.Publish("test", []byte("Hello World"))4	bus.Subscribe("test", func(msg []byte) {5		fmt.Println(string(msg))6	})7	bus.Close()8}

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