package com.vaadin.tests.minitutorials.broadcastingmessages;
import com.vaadin.annotations.Push;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.minitutorials.broadcastingmessages.Broadcaster.BroadcastListener;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.TextArea;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
@Push
public class BroadcasterUI extends UI implements BroadcastListener {
@Override
protected void init(VaadinRequest request) {
final VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
setContent(layout);
final TextArea message = new TextArea("",
"The system is going down for maintenance in 10 minutes");
layout.addComponent(message);
final Button button = new Button("Broadcast");
layout.addComponent(button);
button.addClickListener(new Button.ClickListener() {
@Override
public void buttonClick(ClickEvent event) {
Broadcaster.broadcast(message.getValue());
}
});
// Register broadcast listener
Broadcaster.register(this);
}
@Override
public void detach() {
Broadcaster.unregister(this);
super.detach();
}
@Override
public void receiveBroadcast(final String message) {
access(new Runnable() {
@Override
public void run() {
Notification n = new Notification("Message received", message,
Type.TRAY_NOTIFICATION);
n.show(getPage());
}
});
}
}