// for performance, check digits instead of relying later on catching NumberFormatException
        if (!isDigits(s)) {
            return null;
        }

        try {
            long longValue = Long.parseLong(s);
            if (longValue > Integer.MAX_VALUE) {
                return null;
            }
            return (int) longValue;
        } catch (NumberFormatException e) {

            size = fessConfig.getQueryFacetFieldsSizeAsInteger();
        }
        if (StringUtil.isNotBlank(fessConfig.getQueryFacetFieldsMinDocCount())) {
            minDocCount = Long.parseLong(fessConfig.getQueryFacetFieldsMinDocCount());
        }
        if (StringUtil.isNotBlank(fessConfig.getQueryFacetFieldsSort())) {
            sort = fessConfig.getQueryFacetFieldsSort();
        }

        long readInterval = 0;
        final String value = paramMap.getAsString("readInterval");
        if (StringUtil.isNotBlank(value)) {
            try {
                readInterval = Long.parseLong(value);
            } catch (final NumberFormatException e) {
                logger.warn("Invalid read interval: {}", value);
            }
        }
        return readInterval;
    }

    /**

        this.revision = Byte.parseByte(st.nextToken());
        final String tmp = st.nextToken();
        long id = 0;
        if (tmp.startsWith("0x")) {
            id = Long.parseLong(tmp.substring(2), 16);
        } else {
            id = Long.parseLong(tmp);
        }

        this.identifier_authority = new byte[6];
        for (int i = 5; id > 0; i--) {
            this.identifier_authority[i] = (byte) (id % 256);

        }
        final String minDocCountStr = request.getParameter("facet.minDocCount");
        if (StringUtil.isNotBlank(minDocCountStr)) {
            facetInfo.minDocCount = Long.parseLong(minDocCountStr);
        }
        final String sort = request.getParameter("facet.sort");
        if (StringUtil.isNotBlank(sort)) {
            facetInfo.sort = sort;
        }

        if (props != null) {
            String rawVal = props.getProperty(key);
            if (rawVal != null) {
                try {
                    return new Date(Long.parseLong(rawVal));
                } catch (NumberFormatException e) {
                    getLogger().debug("Cannot parse lastUpdated date: '" + rawVal + "'. Ignoring.", e);
                }
            }
        }

     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }
        maxDocumentRequestSize = Long.parseLong(ComponentUtil.getFessConfig().getIndexerDataMaxDocumentRequestSize());
        maxDocumentCacheSize = ComponentUtil.getFessConfig().getIndexerDataMaxDocumentCacheSizeAsInteger();
        if (ComponentUtil.hasIngestFactory()) {

            final String[] values = rolesStr.split(valueSeparator);
            if (maxAge > 0) {
                try {
                    final long time = getCurrentTime() / 1000 - Long.parseLong(values[0]);
                    if (time > maxAge || time < 0) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("role info is expired: {} > {}", time, maxAge);

                    return value;
                }

                @Override
                public Long getTimeAdjustTimeMillisAsLong() {
                    return Long.parseLong(value);
                }
            };

            FessTimeResourceProvider testProvider = new FessTimeResourceProvider(testConfig);
            assertNotNull(testProvider);
        }
    }

        assertEquals(expected, DocumentUtil.getValue(doc, "key1", String.class));
        assertEquals(Integer.parseInt(expected), DocumentUtil.getValue(doc, "key1", Integer.class).intValue());
        assertEquals(Long.parseLong(expected), DocumentUtil.getValue(doc, "key1", Long.class).longValue());
        assertEquals(Float.parseFloat(expected), DocumentUtil.getValue(doc, "key1", Float.class).floatValue());