// package com.packt.mqttessentials.Sensors01; import java.io.UnsupportedEncodingException; import org.eclipse.paho.client.mqttv3.IMqttActionListener; import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken; import org.eclipse.paho.client.mqttv3.IMqttToken; import org.eclipse.paho.client.mqttv3.MqttAsyncClient; import org.eclipse.paho.client.mqttv3.MqttCallback; import org.eclipse.paho.client.mqttv3.MqttConnectOptions; import org.eclipse.paho.client.mqttv3.MqttException; import org.eclipse.paho.client.mqttv3.MqttMessage; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; import java.util.concurrent.ThreadLocalRandom; import javax.management.OperationsException; public class ConnectionListener implements IMqttActionListener { protected final String name; public ConnectionListener(String name) { this.name = name; } @Override public void onSuccess(IMqttToken asyncActionToken) { System.out.println( String.format( "%s successfully connected", name)); // try { // subscribeToken = // client.subscribe( // TOPIC, // QUALITY_OF_SERVICE, // null, // this); // } catch (MqttException e) { // e.printStackTrace(); // } } @Override public void onFailure(IMqttToken asyncActionToken, Throwable exception) { // The method will run if an operation failed exception.printStackTrace(); } // public MessageActionListener publishTextMessage( // String messageText) { // byte[] bytesMessage; // try { // bytesMessage = // messageText.getBytes(ENCODING); // MqttMessage message; // message = new MqttMessage(bytesMessage); // String userContext = "ListeningMessage"; // MessageActionListener actionListener = // new MessageActionListener( // TOPIC, // messageText, // userContext); // client.publish(TOPIC, // message, // userContext, // actionListener); // return actionListener; // } catch (UnsupportedEncodingException e) { // e.printStackTrace(); // return null; // } catch (MqttException e) { // e.printStackTrace(); // return null; // } // } }