testing

src/main/kotlin/MQTTSubscriber.kt

@@ -0,0 +1,34 @@
+import org.eclipse.paho.client.mqttv3.*
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence
+
+
+class MqttSubscriber : MqttCallbackExtended {
+    private val broker = "tcp://mqtt.k8s.kmlabz.com:1883"
+    private val clientId = MqttClient.generateClientId()
+    private val persistence = MemoryPersistence()
+    private val mqttClient = MqttAsyncClient(broker, clientId, persistence)
+
+    override fun connectionLost(arg0: Throwable) {
+        System.err.println("connection lost")
+    }
+
+    override fun deliveryComplete(arg0: IMqttDeliveryToken) {
+    }
+
+    @Throws(Exception::class)
+    override fun messageArrived(topic: String, message: MqttMessage) {
+        println("topic: $topic")
+        println("message: " + String(message.payload))
+    }
+
+    override fun connectComplete(reconnect: Boolean, serverURI: String?) {
+        mqttClient.subscribe("#", 0)
+    }
+
+    fun connect() {
+        val connOpts = MqttConnectOptions()
+        connOpts.isCleanSession = true
+        mqttClient.setCallback(MqttSubscriber())
+        mqttClient.connect(connOpts)
+    }
+}

src/main/kotlin/Main.kt

@@ -1,3 +1,5 @@
 fun main(){
+    val mqtt = MqttSubscriber()
+    mqtt.connect()
     println("Hello World!")
 }