周期任务-选举领航者

每隔单位时间执行一次任务，多节点需要同步

    @Autowired
    RedissonClient redissonClient;

    /**
     * 时间分片
     */
    private final static long INTERVAL = 30_000L;
    /**
     * 对象名
     */
    private final static String BUCKET_NAME = "";
    /**
     * 上次时间分片数
     */
    private static long lastTotalIntervals = 0;
    /**
     * 领航者标识
     */
    private static boolean lastProcess = false;

    /**
     * 判断本次是否执行操作
     * 每 INTERVAL << 1 重新选举
     *
     * @return TRUE | FALSE
     */
    private boolean operateOneInterval() {
        // 领航者优先一个时间分片,最多两次运行机会
        long currentTotalIntervals =
                ((lastProcess ? INTERVAL : 0L) + System.currentTimeMillis())
                        / (INTERVAL << 1);
        // 比较本地分片
        if (currentTotalIntervals > lastTotalIntervals) {
            RBucket<Long> oneIntervalBucket = redissonClient.getBucket(BUCKET_NAME);
            // 比较最新分片
            Long redisTotalIntervals = oneIntervalBucket.get();
            if (Objects.isNull(redisTotalIntervals)
                    || currentTotalIntervals > (lastTotalIntervals = redisTotalIntervals)) {
                boolean beforeStatue = lastProcess;
                // 选举领航者,更新标识
                lastProcess = oneIntervalBucket.compareAndSet(redisTotalIntervals, currentTotalIntervals);
                System.out.printf("争抢结果:%b, 节点变更:%b", lastProcess, beforeStatue != lastProcess);
            }
        }
        return lastProcess;
    }