delayBeforeProcessing();
                break;
            case POST_PROCESSING:
                delayAfterProcessing();
                break;
            case NO_URL_IN_QUEUE:
                delayAtNoUrlInQueue();
                break;
            case WAIT_NEW_URL:
                delayForWaitingNewUrl();
                break;
            default:
                // NOP
                break;
            }

        }
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.codelibs.fess.crawler.interval.impl.AbstractIntervalController#delayAtNoUrlInQueue
     * ()
     */
    @Override
    protected void delayAtNoUrlInQueue() {
        if (delayMillisAtNoUrlInQueue > 0) {
            ThreadUtil.sleep(delayMillisAtNoUrlInQueue);
        }
    }

    /*
     * (non-Javadoc)
     *