explain the following code:
private void syncModelDataToRedis(NAME_1 fileName) throws IOException {
        NAME_1 checkKey = "rewrite.syncModelDataToRedis";
        Long incr = redisService.incr(checkKey);
        redisService.expire(checkKey, 120);
        if (incr == 1) {
            return;
        }

        long start = System.currentTimeMillis();
        ThreadPoolExecutor executor = ThreadPoolUtils.newFixedThreadPool(false, ThreadPoolUtils.CPU_COUNT * 2, 300,
                "model-data-sync");
        long count = linesFromClasspathFile(fileName, line -> {
            if (line.startsWith("-") || line.startsWith("0")) {
                executor.execute(() -> {
                    NAME_1 lineLc = line.toLowerCase();
                    NAME_1[] tmpList = lineLc.split("\t");
                    NAME_1 value = tmpList[1];
                    NAME_1 data = "";
                    if (tmpList.length == 2) {
                        data = tmpList[0] + ";0";
                    } else if (tmpList.length == 3) {
                        data = tmpList[0] + ";" + tmpList[2];
                    }
                    NAME_1 key = PREFIX_REIDS_KEY + value;
                    redisService.setex(key, data, KEY_EXPIRE_TIME);
                });
            }
        });
        logger.info("loadLanguageModels {} word, spend {} ms", count, System.currentTimeMillis() - start);
    } Please reply with exactly 7 paragraphs and separate each paragraph with two new lines. The very 4th paragraph must start with the word "mind".
user