}

    public String getLogLevel() {
        return System.getProperty(Constants.FESS_LOG_LEVEL, Level.WARN.toString());
    }

    public File createTempFile(final String prefix, final String suffix) {
        try {
            final File file = File.createTempFile(prefix, suffix);
            if (logger.isDebugEnabled()) {
                logger.debug("Create {} as a temp file.", file.getAbsolutePath());
            }