func newSubscribeMessage(topic string, qos byte) *message.SubscribeMessage {
msg := message.NewSubscribeMessage()
msg.SetPacketId(1)
msg.AddTopic([]byte(topic), qos)
return msg
}
func ExampleClient() {
// Instantiates a new Client
c := &Client{}
// Creates a new MQTT CONNECT message and sets the proper parameters
msg := message.NewConnectMessage()
msg.SetWillQos(1)
msg.SetVersion(4)
msg.SetCleanSession(true)
msg.SetClientId([]byte("surgemq"))
msg.SetKeepAlive(10)
msg.SetWillTopic([]byte("will"))
msg.SetWillMessage([]byte("send me home"))
msg.SetUsername([]byte("surgemq"))
msg.SetPassword([]byte("verysecret"))
// Connects to the remote server at 127.0.0.1 port 1883
c.Connect("tcp://127.0.0.1:1883", msg)
// Creates a new SUBSCRIBE message to subscribe to topic "abc"
submsg := message.NewSubscribeMessage()
submsg.AddTopic([]byte("abc"), 0)
// Subscribes to the topic by sending the message. The first nil in the function
// call is a OnCompleteFunc that should handle the SUBACK message from the server.
// Nil means we are ignoring the SUBACK messages. The second nil should be a
// OnPublishFunc that handles any messages send to the client because of this
// subscription. Nil means we are ignoring any PUBLISH messages for this topic.
c.Subscribe(submsg, nil, nil)
// Creates a new PUBLISH message with the appropriate contents for publishing
pubmsg := message.NewPublishMessage()
pubmsg.SetTopic([]byte("abc"))
pubmsg.SetPayload(make([]byte, 1024))
pubmsg.SetQoS(0)
// Publishes to the server by sending the message
c.Publish(pubmsg, nil)
// Disconnects from the server
c.Disconnect()
}
func newSubscribeMessage(qos byte) *message.SubscribeMessage {
msg := message.NewSubscribeMessage()
msg.AddTopic([]byte("abc"), qos)
return msg
}