Data caching mechanism - Data Synchronization

In the data synchronization mode, for some can not monitor data changes or data changes too often, the way I used the timer update cached data, for example:

    @Scheduled(fixedRate = 1000)
    public void getCurrentDate() {
        List<Map<String, Object>> instanceList = assemblyService.getInstanceList(); 
        for (Map<String, Object> instance : instanceList) {
            String url = DataUtil.objToString(instance.get("homePageUrl"));
            String instanceId = DataUtil.objToString(instance.get("instanceId"));
            insert(url, instanceId);
        }
    }

The drawbacks is that this way, thread blocking easily occurs, so the way to the long link:

    private static void run() {
        Date date =new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("hahhaha"+sdf.format(date));
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace ();
        }finally {
            run();
        }
    }
    
    public static void main(String[] args) {
        run();
    }

The difference between these two methods is that:

(1) The first way: When the process is blocked, one second will still be executed once the method.

(2) The second way: When the process is blocked, the program will wait for execution after the execution once in every second.

So using a long way connected to solve congestion problems