func setupSubscriptions(client *mqtt.Client, wg *sync.WaitGroup) { if topicFiltersString != "" { wg.Add(numberMessagesExpected) topicFilters := strings.Split(topicFiltersString, ",") for _, filter := range topicFilters { client.Subscribe(filter, qos, func(client *mqtt.Client, msg mqtt.Message) { if !msg.Retained() || !ignoreRetained { payload := bytes.NewBuffer(msg.Payload()).String() if ignorePayload { fmt.Printf("r:%v, t:%v, s:%v\n", msg.Retained(), msg.Topic(), len(payload)) } else { infoF("r:%v, t:%v, s:%v", msg.Retained(), msg.Topic(), len(payload)) fmt.Printf("%v\n", payload) } wg.Done() } else { info("ignoring retained msg") } }) } infoF("waiting for %v msgs.", numberMessagesExpected) } else { info("No subscriptions...") } }
// メッセージを受信する。 func Subscribe(client *MQTT.Client, topic string, qos byte) *SubscribeResult { var result *SubscribeResult = &SubscribeResult{} result.Count = 0 var handler MQTT.MessageHandler = func(client *MQTT.Client, msg MQTT.Message) { result.Count++ if Debug { fmt.Printf("Received message : topic=%s, message=%s\n", msg.Topic(), msg.Payload()) } } token := client.Subscribe(topic, qos, handler) if token.Wait() && token.Error() != nil { fmt.Printf("Subscribe error: %s\n", token.Error()) } return result }