How to use publishMessages method of mqtt Package

Best Venom code snippet using mqtt.publishMessages

mqtt.go

Source:mqtt.go

...79	}80	var err error81	switch e.ClientType {82	case "publisher":83		err = e.publishMessages(ctx)84		if err != nil {85			result.Err = err.Error()86		}87	case "persistent_queue":88		err = e.persistMessages(ctx)89		if err != nil {90			result.Err = err.Error()91		}92	case "subscriber":93		result.Messages, result.MessagesJSON, result.Topics, err = e.consumeMessages(ctx)94		if err != nil {95			result.Err = err.Error()96		}97	default:98		return nil, fmt.Errorf("clientType %q must be publisher, subscriber or persistent_queue", e.ClientType)99	}100	elapsed := time.Since(start)101	result.TimeSeconds = elapsed.Seconds()102	return result, nil103}104// session prepares a client connection returning a client and a possible error105func (e Executor) session(ctx context.Context, subscriber func(client mq.Client, message mq.Message)) (mq.Client, error) {106	venom.Debug(ctx, "creating session to %v, cleanSession: %v, clientID: %v", e.Addrs, !e.PersistSubscription, e.ClientID)107	opts := mq.NewClientOptions().108		AddBroker(e.Addrs).109		SetConnectTimeout(time.Duration(e.ConnectTimeout) * time.Millisecond).110		SetCleanSession(!e.PersistSubscription).111		SetClientID(e.ClientID).112		SetProtocolVersion(mqttV311).113		SetOnConnectHandler(func(client mq.Client) {114			venom.Debug(ctx, "connection handler called. IsConnected: %v", client.IsConnected())115		})116	client := mq.NewClient(opts)117	// MQTT may send messages prior to a subscription taking place (due to pre-existing persistent session).118	// We cannot subscribe without a connection so we register a route and subscribe later119	if subscriber != nil {120		venom.Debug(ctx, "adding routes: %v", e.Topics)121		for _, topic := range e.Topics {122			client.AddRoute(topic, subscriber)123		}124	}125	token := client.Connect()126	select {127	case <-token.Done():128		if token.Error() != nil {129			venom.Debug(ctx, "connection setup failed")130			return nil, errors.Wrap(token.Error(), "failed to connect to MQTT")131		}132		// else connection complete, all good.133	case <-time.After(time.Duration(e.Timeout) * time.Millisecond):134		venom.Debug(ctx, "connection timeout")135		return nil, errors.Wrap(token.Error(), "failed to connect to MQTT")136	case <-ctx.Done():137		venom.Debug(ctx, "Context requested cancellation in session()")138		return nil, errors.New("Context requested cancellation in session()")139	}140	venom.Debug(ctx, "connection setup completed")141	return client, nil142}143// publishMessages is a step that sends configured messages to client connection144func (e Executor) publishMessages(ctx context.Context) error {145	client, err := e.session(ctx, nil)146	if err != nil {147		venom.Debug(ctx, "Failed to create session (publishMessages)")148		return err149	}150	defer client.Disconnect(disconnectTimeoutMs)151	for i, m := range e.Messages {152		if len(m.Topic) == 0 {153			return errors.Errorf("mandatory field Topic was empty in Messages[%v](%v)", i, m)154		}155		token := client.Publish(m.Topic, m.QOS, m.Retained, m.Payload)156		select {157		case <-token.Done():158			if token.Error() != nil {159				venom.Debug(ctx, "Message publish failed")160				return errors.Wrapf(token.Error(), "Message publish failed: Messages[%v](%v)", i, m)161			}162			// else publish complete, all good.163		case <-time.After(time.Duration(e.Timeout) * time.Millisecond):164			venom.Debug(ctx, "Publish attempt timed out")165			return errors.Errorf("Publish attempt timed out on topic %v", m.Topic)166		case <-ctx.Done():167			venom.Debug(ctx, "Context requested cancellation in publishMessages()")168			return errors.New("Context requested cancellation in publishMessages()")169		}170		venom.Debug(ctx, "Message[%v] %q sent (topic: %q)", i, m.Payload, m.Topic)171	}172	return nil173}174// consumeMessages is a step to consume messages from mqtt broker using client connection175func (e Executor) consumeMessages(ctx context.Context) (messages []interface{}, messagesJSON []interface{}, topics []string, err error) {176	ch := make(chan mq.Message, 1)177	defer close(ch)178	subscriber := newSubscriber(ctx, ch)179	client, err := e.session(ctx, subscriber)180	if err != nil {181		venom.Debug(ctx, "Failed to create session (consumeMessages)")182		return nil, nil, nil, err...

server_tester.go

Source:server_tester.go

...30}31func main() {32	initUser(testUsername, testPassword)33	startClient(testUserID, testUsername, testPassword, loadTLSConfig())34	publishMessages()35	watch()36}37func loadTLSConfig() *tls.Config {38	cert, err := tls.LoadX509KeyPair(clientCertFile, clientKeyFile)39	if err != nil {40		logger.Fatal("Load tls file", zap.Error(err))41	}42	return &tls.Config{43		ClientAuth:         tls.NoClientCert,44		InsecureSkipVerify: true,45		Certificates:       []tls.Certificate{cert},46	}47}48func onMessageReceived(client MQTT.Client, message MQTT.Message) {49	logger.Info("Received message", zap.String("topic", message.Topic()), zap.ByteString("payload", message.Payload()))50}51func initUser(username, password string) {52	address := fmt.Sprintf("%s:%d", agentHost, agentGrpcPort)53	cc, err := grpc.Dial(address, grpc.WithInsecure())54	if err != nil {55		logger.Fatal("Grpc connect", zap.Error(err))56	}57	// Create user58	userClient := NewUserSvcClient(cc)59	_, err = userClient.Add(context.Background(), &AddUserRequest{60		Id:       testUserID,61		Username: username,62		Password: password,63		Ip:       "",64	})65	if err != nil {66		logger.Fatal("Create user", zap.Error(err))67	}68	// Join group69	groupClient := NewGroupSvcClient(cc)70	_, err = groupClient.AddMembers(context.Background(), &AddMembersRequest{71		GroupId: testGroupID,72		Members: []string{testUserID},73	})74	if err != nil {75		logger.Fatal("Join group", zap.Error(err))76	}77}78func startClient(clientID, username, password string, tlsConfig *tls.Config) {79	connectC := make(chan struct{})80	connOpts := MQTT.81		NewClientOptions().82		AddBroker(server).83		SetClientID(clientID).84		SetCleanSession(true).85		SetUsername(username).86		SetPassword(password)87	if tlsConfig != nil {88		connOpts.SetTLSConfig(tlsConfig)89	}90	connOpts.OnConnect = func(c MQTT.Client) {91		logger.Info("Connect", zap.String("clientID", clientID))92		connectC <- struct{}{}93	}94	connOpts.OnConnectionLost = func(client MQTT.Client, err error) {95		logger.Info("Connection lost", zap.Error(err))96	}97	client := MQTT.NewClient(connOpts)98	token := client.Connect()99	token.Wait()100	if err := token.Error(); err != nil {101		logger.Error("Connect", zap.Error(err))102	}103	logger.Info("Connect...")104	<-connectC105	topics := []string{106		"u/" + clientID,107		"g/" + testGroupID,108		"p/" + clientID,109	}110	var qos byte = 1111	for _, topic := range topics {112		token := client.Subscribe(topic, qos, onMessageReceived)113		token.Wait()114		if err := token.Error(); err != nil {115			logger.Error("Subscribe", zap.Error(err))116		}117	}118}119func publishMessages() {120	address := fmt.Sprintf("%s:%d", agentHost, agentGrpcPort)121	cc, err := grpc.Dial(address, grpc.WithInsecure())122	if err != nil {123		logger.Fatal("Grpc connect", zap.Error(err))124	}125	// Publish user message126	imClient := NewIMSvcClient(cc)127	_, err = imClient.Publish(context.Background(), &PublishRequest{128		Topic:    "u/" + testUserID,129		Payload:  time.Now().Format("2006-01-02 15:04:05.999999999"),130		Qos:      1,131		Retained: false,132	})133	if err != nil {...

worker.go

Source:worker.go

...34func (w *Worker) RunConcurrentlyPublishingClients(simReq *SimulationRequest) (string, error) {35	fmt.Printf("Initializing %d concurrent mqtt clients\n", simReq.ClientCount)36	executionDuration := ConcurrentWorkerExecutor(simReq.ClientCount, w.MaxConnectionRequestsPerSecond, func(thingId int) error {37		clientId := simReq.StartClientNumber + thingId38		if err := w.publishMessages(clientId, simReq); err != nil {39			fmt.Printf("Failed to publish messages: %v\n", err)40		}41		return nil42	})43	return fmt.Sprintf("Simulation complete. Total Execution time: %v", executionDuration), nil44}45func (w *Worker) publishMessages(clientNumber int, simReq *SimulationRequest) error {46	clientID := fmt.Sprintf("%s-%d", w.ClientIDPrefix, clientNumber)47	//TODO - allow for topic to be injected with support for placeholders48	topic := fmt.Sprintf("%s/%s", w.TopicPrefix, clientID)49	mqttClient := mqtt.NewClient(w.MqttHost, w.MqttPort, clientID, w.tlsConfig)50	if token := mqttClient.Connect(); token.Wait() && token.Error() != nil {51		return fmt.Errorf("[%s] Failed to get connection token: %s", clientID, token.Error().Error())52	}53	log.Printf("[%s] Connected\n", clientID)54	for messageNumber := 1; messageNumber <= simReq.MessagesPerClient; messageNumber++ {55		//TODO - allow for the message to be injected from SimulationRequest with support for dynamic ranges56		payload := map[string]interface{}{57			"message_number": messageNumber,58			"client_id":      clientID,59			"timestamp":      time.Now().Format(time.RFC3339),...

publishMessages

Using AI Code Generation

1import (2func main() {3    mqttClient = mqtt.NewClient(mqtt.NewClientOptions())4    mqttClient.Connect()5    mqttClient.PublishMessages("topic1", "message1")6    fmt.Println("message published")7}8import (9func main() {10    mqttClient = mqtt.NewClient(mqtt.NewClientOptions())11    mqttClient.Connect()12    mqttClient.Publish("topic1", "message1")13    fmt.Println("message published")14}15import (16func main() {17    mqttClient = mqtt.NewClient(mqtt.NewClientOptions())18    mqttClient.Connect()19    mqttClient.Publish("topic1", "message1")20    fmt.Println("message published")21}22import (23func main() {24    mqttClient = mqtt.NewClient(mqtt.NewClientOptions())25    mqttClient.Connect()26    mqttClient.Publish("topic1", "message1")27    fmt.Println("message published")28}29import (30func main() {31    mqttClient = mqtt.NewClient(mqtt.NewClientOptions())32    mqttClient.Connect()33    mqttClient.Publish("topic1", "message1")34    fmt.Println("message published")35}36import (37func main() {38    mqttClient = mqtt.NewClient(mqtt.NewClientOptions())39    mqttClient.Connect()

publishMessages

Using AI Code Generation

1import (2const (3func main() {4    fmt.Println("Starting the application...")5    c := mqtt.NewClient(mqtt.NewClientOptions().AddBroker(broker))6    if token := c.Connect(); token.Wait() && token.Error() != nil {7        panic(token.Error())8    }9    fmt.Println("Connected to the broker")10    for i := 0; i < 10; i++ {11        text := "This is message number " + strconv.Itoa(i)12        token := c.Publish(topic, 0, false, text)13        token.Wait()14        fmt.Println("Published message: ", text)15        time.Sleep(1 * time.Second)16    }17    c.Disconnect(250)18    fmt.Println("Application stopped")19}20import (21const (22func main() {23    fmt.Println("Starting the application...")24    c := mqtt.NewClient(mqtt.NewClientOptions().AddBroker(broker))25    if token := c.Connect(); token.Wait() && token.Error() != nil {26        panic(token.Error())27    }28    fmt.Println("Connected to the broker")29    if token := c.Subscribe(topic, 0, nil); token.Wait() && token.Error() != nil {30        fmt.Println(token.Error())31        os.Exit(1)32    }33    fmt.Println("Subscribed to the topic")34    time.Sleep(3 * time.Second)35    c.Disconnect(250)36    fmt.Println("Application stopped")37}38import (39const (40func main() {41    fmt.Println("Starting the application...")42    c := mqtt.NewClient(mqtt.NewClientOptions().AddBroker(broker))43    if token := c.Connect();

publishMessages

Using AI Code Generation

1import (2func main() {3    fmt.Println("Hello World")4    mqttObj.PublishMessages("topic", "message")5}6import (7func main() {8    fmt.Println("Hello World")9    mqttObj.Subscribe("topic", 1, func(client mqtt.Client, message mqtt.Message) {10        fmt.Println("Received message: ", string(message.Payload()), " on topic: ", message.Topic(), " with QoS: ", message.Qos())11    })12}13import (14func main() {15    fmt.Println("Hello World")16    mqttObj.Subscribe("topic", 1, func(client mqtt.Client, message mqtt.Message) {17        fmt.Println("Received message: ", string(message.Payload()), " on topic: ", message.Topic(), " with QoS: ", message.Qos())18    })19}20import (21func main() {22    fmt.Println("Hello World")23    mqttObj.Subscribe("topic", 1, func(client mqtt.Client, message mqtt.Message) {24        fmt.Println("Received message: ", string(message.Payload()), " on topic: ", message.Topic(), " with QoS: ", message.Qos())25    })26}27import (28func main() {

publishMessages

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World")4	mqtt.Connect()5	mqtt.Publish("test", "test")6	time.Sleep(5 * time.Second)7}8import (9func main() {10	fmt.Println("Hello World")11	mqtt.Connect()12	mqtt.Publish("test", "test")13	time.Sleep(5 * time.Second)14}15import (16func main() {17	fmt.Println("Hello World")18	mqtt.Connect()19	mqtt.Publish("test", "test")20	time.Sleep(5 * time.Second)21}22import (23func main() {24	fmt.Println("Hello World")25	mqtt.Connect()26	mqtt.Publish("test", "test")27	time.Sleep(5 * time.Second)28}29import (30func main() {31	fmt.Println("Hello World")32	mqtt.Connect()33	mqtt.Publish("test", "test")34	time.Sleep(5 * time.Second)35}

publishMessages

Using AI Code Generation

1import (2func main() {3	mqtt = mqtt.Mqtt{}4	mqtt.PublishMessages("test", "test")5	fmt.Println("Hello, playground")6}7import (8type Mqtt struct {9}10func (m Mqtt) PublishMessages(topic string, message string) {11	opts.SetClientID("go-simple")12	opts.SetDefaultPublishHandler(f)13	c := MQTT.NewClient(opts)14	if token := c.Connect(); token.Wait() && token.Error() != nil {15		panic(token.Error())16	}17	if token := c.Publish(topic, 0, false, message); token.Wait() && token.Error() != nil {18		fmt.Println(token.Error())19	}20	c.Disconnect(250)21}22func f(client MQTT.Client, msg MQTT.Message) {23	fmt.Printf("TOPIC: %s\n", msg.Topic())24	fmt.Printf("MSG: %s\n", msg.Payload())25}26import (27func main() {28	mqtt = mqtt.Mqtt{}29	mqtt.SubscribeMessages("test")30	fmt.Println("Hello, playground")31}32import (33type Mqtt struct {34}35func (m Mqtt) SubscribeMessages(topic string) {36	opts.SetClientID("go-simple")37	opts.SetDefaultPublishHandler(f)38	c := MQTT.NewClient(opts)39	if token := c.Connect(); token.Wait() && token.Error() != nil {40		panic(token.Error())41	}42	if token := c.Subscribe(topic, 0, nil); token.Wait() && token.Error() != nil {43		fmt.Println(token.Error())44	}45}46func f(client MQTT.Client, msg MQTT.Message) {47	fmt.Printf("TOPIC: %s\n",

publishMessages

Using AI Code Generation

1import (2func main() {3	mqtt := Mqtt{4	}5	mqtt.Connect()6	for i := 0; i < 100; i++ {7		mqtt.PublishMessages(fmt.Sprintf("hello %d", i))8		time.Sleep(1 * time.Second)9	}10	mqtt.Disconnect()11}12import (13func main() {14	mqtt := Mqtt{15	}16	mqtt.Connect()17	mqtt.SubscribeMessages()18	time.Sleep(5 * time.Second)19	mqtt.Disconnect()20}21import (22func main() {23	mqtt := Mqtt{24	}25	mqtt.Connect()26	mqtt.SubscribeMessages()27	time.Sleep(5 * time.Second)28	mqtt.Disconnect()29}30import (31func main() {32	mqtt := Mqtt{33	}34	mqtt.Connect()35	mqtt.SubscribeMessages()36	time.Sleep(5 * time.Second)37	mqtt.Disconnect()38}39import (40func main() {41	mqtt := Mqtt{42	}43	mqtt.Connect()44	mqtt.SubscribeMessages()45	time.Sleep(5 * time.Second)46	mqtt.Disconnect()47}

publishMessages

Using AI Code Generation

1func main() {2    client.PublishMessages()3}4func main() {5    client.SubscribeMessages()6}7func main() {8    client.PublishMessages()9}10func main() {11    client.SubscribeMessages()12}13func main() {14    client.PublishMessages()15}16func main() {17    client.SubscribeMessages()18}19func main() {20    client.PublishMessages()21}22func main() {23    client.SubscribeMessages()24}25func main() {26    client.PublishMessages()27}

publishMessages

Using AI Code Generation

1import (2func main() {3	fmt.Println("main function started")4	mqtt := Mqtt{}5	mqtt.Connect()6	mqtt.PublishMessages()7	time.Sleep(time.Second * 5)8	mqtt.Disconnect()9}10import (11type Mqtt struct {12}13func (m *Mqtt) Connect() {14	opts.SetClientID("go-mqtt-client")15	opts.SetUsername("user")16	opts.SetPassword("pass")17	m.client = mqtt.NewClient(opts)18	if token := m.client.Connect(); token.Wait() && token.Error() != nil {19		panic(token.Error())20	}21}22func (m *Mqtt) PublishMessages() {23	m.client.Publish("topic1", 0, false, "message1")24	m.client.Publish("topic2", 0, false, "message2")25}26func (m *Mqtt) Disconnect() {27	m.client.Disconnect(250)28}29import (30type Mqtt struct {31}32func (m *Mqtt) Connect() {33	opts.SetClientID("go-mqtt-client")34	opts.SetUsername("user")35	opts.SetPassword("pass")36	m.client = mqtt.NewClient(opts)37	if token := m.client.Connect(); token.Wait() && token.Error() != nil {38		panic(token.Error())39	}40}41func (m *Mqtt) PublishMessages() {42	m.client.Publish("topic1", 0, false, "message1")43	m.client.Publish("topic2", 0, false, "message2")44}45func (m *Mqtt) Disconnect() {46	m.client.Disconnect(250)47}48func main() {49	fmt.Println("main function started")50	mqtt := Mqtt{}51	mqtt.Connect()52	mqtt.PublishMessages()53	time.Sleep(time.Second * 5)54	mqtt.Disconnect()55}

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