redis setnx 分布式鎖

標籤：

    private final String RedisLockKey = "RedLock";    private final long altTimeout = 1 * 60 * 60 * 1000L;// 1hour    /**     * 擷取redis分布式鎖     *      * @author Administrator     * @version 1.0     * @return true:獲得鎖許可權 false:未獲得鎖許可權     */    private synchronized boolean getRedLock() {        Long flag = jedis.setnx(RedisLockKey, String.valueOf(System.currentTimeMillis() + altTimeout + 1L));        if (flag == 0L) {            String value = jedis.get(RedisLockKey);            long longVal = Long.parseLong(value);            if (longVal > System.currentTimeMillis()) {// 未到期                return Boolean.FALSE;            } else {// 到期                String _value =                    jedis.getSet(RedisLockKey, String.valueOf(System.currentTimeMillis() + altTimeout + 1L));                long _longVal = Long.parseLong(_value);                if (_longVal > System.currentTimeMillis()) {                    return Boolean.FALSE;                } else {                    return Boolean.TRUE;                }            }        } else {            return Boolean.TRUE;        }    }

 

redis setnx 分布式鎖