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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