public class SendMethodListener implements CompletionListener {

    @Override
    public void onCompletion(Message message) {
        System.out.println("Message " + message + " sent successfully");
    }
    
    @Override
    public void onException(Message message, Exception exception) {
        System.out.println("Message " + message + " not sent successfully: " + exception.getMessage());
        if (Constants.DEBUG)
            exception.printStackTrace();
    }
}