Server Push with SSE

SSE (Server-Sent Events) enables the server to push updates to the browser. It's simpler than WebSocket and perfect for many use cases.

When to Use SSE

• Dashboards with live data
• Notification systems
• Progress updates
• Live feeds

SSE vs WebSocket

SSE: Server pushes, client uses HTTP for actions

WebSocket: Full bidirectional, persistent connection

Implementation

@Page(value = "/notifications", communication = Communication.SSE)
public class NotificationsPage extends HtmlPage
{
    public void pushNotification(String message)
    {
        notificationArea.addElement(createNotification(message));
        // Changes automatically pushed via SSE
    }
}

Conclusion

SSE is the sweet spot for server push—simpler than WebSocket, works with standard HTTP infrastructure.