Java tutorial
package com.thingtrack.vaadin.mobile; /* * #%L * Vaadin TouchKit Web Application * $Id:$ * $HeadURL:$ * %% * Copyright (C) 2013 Thingtrack S.L. * %% * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * #L% */ import org.eclipse.paho.client.mqttv3.MqttCallback; import org.eclipse.paho.client.mqttv3.MqttDeliveryToken; import org.eclipse.paho.client.mqttv3.MqttMessage; import org.eclipse.paho.client.mqttv3.MqttTopic; import com.vaadin.annotations.Theme; import com.vaadin.annotations.Title; import com.vaadin.annotations.Widgetset; import com.vaadin.server.VaadinRequest; import com.vaadin.ui.Alignment; import com.vaadin.ui.Label; import com.vaadin.ui.UI; import com.vaadin.ui.VerticalLayout; /** * The Application's "main" class */ @Theme("mobiletheme") @Widgetset("com.thingtrack.vaadin.mobile.gwt.AppWidgetSet") @Title("My Mobile App") public class MyVaadinApplication extends UI { private VerticalLayout mainLayout; @Override protected void init(VaadinRequest request) { mainLayout = new VerticalLayout(); mainLayout.setSizeFull(); mainLayout.setMargin(true); setContent(mainLayout); mainLayout.setDefaultComponentAlignment(Alignment.MIDDLE_CENTER); Label loadingText = new Label("MESSAGES RECEIVED: "); loadingText.setSizeUndefined(); mainLayout.addComponent(loadingText); Subscriber subscriber = new Subscriber(); subscriber.start(new MqttCallback() { @Override public void messageArrived(MqttTopic topic, MqttMessage message) throws Exception { System.out .println("Message arrived. Topic: " + topic.getName() + " Message: " + message.toString()); Label loadingText = new Label(message.toString()); loadingText.setSizeUndefined(); mainLayout.addComponent(loadingText); } @Override public void deliveryComplete(MqttDeliveryToken arg0) { // TODO Auto-generated method stub } @Override public void connectionLost(Throwable arg0) { // TODO Auto-generated method stub } }); } @Override public void markAsDirty() { // TODO Auto-generated method stub } }