创建分布式锁

private static final String LOCK_SUCCESS = "OK";
private static final String SET_IF_NOT_EXIST = "NX";
private static final String SET_WITH_EXPIRE_TIME = "EX";
private static final Long RELEASE_SUCCESS = 1L;

private static final String LVCC_LEDGER_LOCK = "lvcc:ledger:lock:";

/**
 * 尝试加分布式锁
 *
 * @param lockKey    锁名称
 * @param requestId  请求标识
 * @param expireTime 超期时间 单位秒
 * @return 是否加锁成功
 */
public boolean setDcsLock(String lockKey, String requestId, int expireTime) {
    RedisConnection conn = RedisConnectionUtils.getConnection(redisTemplate.getConnectionFactory());
    Jedis jedis = (Jedis) conn.getNativeConnection();
    String result = jedis.set(LVCC_LEDGER_LOCK + lockKey, requestId,
            SET_IF_NOT_EXIST, SET_WITH_EXPIRE_TIME, expireTime);
    if (LOCK_SUCCESS.equals(result)) {
        return true;
    }
    return false;
}

/**
 * 释放分布式锁
 *
 * @param lockKey   锁名称
 * @param requestId 请求标识
 * @return 是否释放成功
 */
public boolean delDcsLock(String lockKey, String requestId) {
    RedisConnection conn = RedisConnectionUtils.getConnection(redisTemplate.getConnectionFactory());
    Jedis jedis = (Jedis) conn.getNativeConnection();
    String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
    Object result = jedis.eval(script, Collections.singletonList(LVCC_LEDGER_LOCK + lockKey),
            Collections.singletonList(requestId));
    if (RELEASE_SUCCESS.equals(result)) {
        return true;
    }
    return false;
}