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Venom
mqtt
consumeMessages

How to use consumeMessages method of mqtt Package

Best Venom code snippet using mqtt.consumeMessages

mqtt.go

Source:mqtt.go

...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, err183	}184	defer client.Disconnect(disconnectTimeoutMs)185	start := time.Now()186	for _, topic := range e.Topics {187		token := client.Subscribe(topic, e.QOS, subscriber)188		select {189		case <-token.Done():190			if token.Error() != nil {191				venom.Debug(ctx, "Failed to subscribe")192				return nil, nil, nil, errors.Wrapf(token.Error(), "failed to subscribe to topic %v", topic)193			}194			// else subscription complete, all good.195		case <-time.After(time.Duration(e.Timeout) * time.Millisecond):...

consumeMessages

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World")4	mqtt := Mqtt{}5	mqtt.Init()6	mqtt.Connect()7	mqtt.Subscribe()8	mqtt.ConsumeMessages()9	time.Sleep(3600 * time.Second)10}11import (12func main() {13	fmt.Println("Hello World")14	mqtt := Mqtt{}15	mqtt.Init()16	mqtt.Connect()17	mqtt.Subscribe()18	mqtt.ConsumeMessages()19	time.Sleep(3600 * time.Second)20}21import (22func main() {23	fmt.Println("Hello World")24	mqtt := Mqtt{}25	mqtt.Init()26	mqtt.Connect()27	mqtt.Subscribe()28	go mqtt.ConsumeMessages()29	time.Sleep(3600 * time.Second)30}31I have tried to import the package in the following way:32import "github.com/eclipse/paho.mqtt.golang"

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