*/
    public void offer(final LogNotificationEvent event) {
        int maxBufferSize;
        try {
            maxBufferSize = ComponentUtil.getFessConfig().getLogNotificationBufferSizeAsInteger();
        } catch (final Exception e) {
            maxBufferSize = 1000;
        }
        queue.offer(event);
        if (size.incrementAndGet() > maxBufferSize) {
            if (queue.poll() != null) {