Java tutorial
/* * Copyright (c) 2015. David Sowerby * * 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. */ package uk.q3c.krail.core.view.component; import com.google.inject.Inject; import com.vaadin.ui.TextArea; import net.engio.mbassy.listener.Handler; import net.engio.mbassy.listener.Listener; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import uk.q3c.krail.core.eventbus.SubscribeTo; import uk.q3c.krail.core.eventbus.UIBus; import uk.q3c.krail.core.guice.uiscope.UIScoped; import uk.q3c.krail.core.push.PushMessage; import uk.q3c.krail.i18n.LabelKey; import uk.q3c.krail.i18n.Translate; /** * Displays all the messages received by the Broadcaster */ @UIScoped @Listener @SubscribeTo(UIBus.class) public class BroadcastMessageLog extends TextArea { private static Logger log = LoggerFactory.getLogger(BroadcastMessageLog.class); @Inject protected BroadcastMessageLog(Translate translate) { super(); setCaption(translate.from(LabelKey.Broadcast_Messages)); setImmediate(true); } @Handler public void receiveMessage(PushMessage pushMessage) { log.debug("Receiving message: '{}' for group: '{}'", pushMessage.getMessage(), pushMessage.getGroup()); StringBuilder buf = new StringBuilder(pushMessage.getGroup()); buf.append(":"); buf.append(pushMessage.getMessage()); buf.append("\n"); buf.append(this.getValue()); this.setValue(buf.toString()); } }