127.0.0.1:6379> mset name name1 name2 name3
(error) CROSSSLOT Keys in request don't hash to the same slot

127.0.0.1:6379> mset name {name} {name}1 {name}2 {name}3

local locks = red:lrange("lock_keys", 1, -1)
for i, v in iprs(locks) do
    if redis.call("setnx", v, field) == 1 then
        red.lpush("locked_keys", v)
    end
end

local unlocked_locks = red:lrange("locked_keys",1, -1)
for i, v in iprs(unlocked_locks) do
    red.del(v)
end
red.del("locked_keys")

-- 使用Redis watch，開(kāi)始監(jiān)聽(tīng)
red.watch("lock_keys")
-- 進(jìn)行具體操作
-- …
-- 解鎖操作
red.unwatch()

	/**
	 * 加鎖腳本
	 * KEYS[1] key
	 * ARGV[1] value
	 * ARGV[2] expire
	 * 判斷key是否存在，不存在則加鎖，并記錄加鎖次數(shù)+1；若存在，則判斷value是否相等，相等則記錄加鎖次數(shù)+1，不相等則返回0
	 */
	private static final String REENTRANT_LOCK_SCRIPT = "if redis.call('EXISTS', KEYS[1]) == 0 then " +
        "    redis.call('SET', KEYS[1], ARGV[1]) " +
        "    redis.call('EXPIRE', KEYS[1], ARGV[2]) " +
        "    redis.call('INCR', 'lockCount:' .. KEYS[1]) " +
        "    return 1 " +
        "else " +
        "    if redis.call('GET', KEYS[1]) == ARGV[1] then " +
        "        redis.call('EXPIRE', KEYS[1], ARGV[2]) " +
        "        redis.call('INCR', 'lockCount:' .. KEYS[1]) " +
        "        return 1 " +
        "    else " +
        "        return 0 " +
        "    end " +
        "end";
        
    @Bean
    public DefaultRedisScript<Long> reentrantLockRedisScript(){
        DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>(REENTRANT_LOCK_SCRIPT, Long.class);
        try {
            List<Boolean> results= redisTemplate.getConnectionFactory().getConnection().scriptExists(redisScript.getSha1());
            if(Boolean.FALSE.equals(results.get(0)))
            {
                redisTemplate.getConnectionFactory().getConnection().scriptLoad(redisScript.getScriptAsString().getBytes());
                log.info("redis reentrantLockRedisScript load success");
            }

        }catch (Exception ex){
            log.error("redis reentrantLockRedisScript load error",ex);
        }

        return redisScript;
    }

    private static final String RELEASE_REENTRANT_LOCK_SCRIPT = "if redis.call('EXISTS', KEYS[1]) == 0 then " +
            "    return 0 " +
            "else " +
            "    if redis.call('GET', KEYS[1]) == ARGV[1] then " +
            "        redis.call('DECR', 'lockCount:' .. KEYS[1]) " +
            "        if redis.call('GET', 'lockCount:' .. KEYS[1]) == '0' then " +
            "            redis.call('DEL', KEYS[1]) " +
            "        end " +
            "        return 1 " +
            "    else " +
            "        return 0 " +
            "    end " +
            "end";
    @Bean
    public DefaultRedisScript<Long> releaseReentrantLockRedisScript(){
        DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>(RELEASE_REENTRANT_LOCK_SCRIPT, Long.class);
        try {
            List<Boolean> results= redisTemplate.getConnectionFactory().getConnection().scriptExists(redisScript.getSha1());
            if(Boolean.FALSE.equals(results.get(0)))
            {
                redisTemplate.getConnectionFactory().getConnection().scriptLoad(redisScript.getScriptAsString().getBytes());
                log.info("redis releaseReentrantLockRedisScript load success");
            }

        }catch (Exception ex){
            log.error("redis releaseReentrantLockRedisScript load error",ex);
        }

        return redisScript;
    }

private static final String KEY_FORMAT = "%s{%s}";
String slotKey = String.format(KEY_FORMAT, key, key);

/**
     * 可重入鎖，value相同的情況下，可重復(fù)加鎖，當(dāng)所有加鎖方都解鎖后才會(huì)釋放鎖
     *
     * @param key           鎖的key
     * @param value         鎖的value
     * @param expireSeconds 鎖過(guò)期時(shí)間
     * @param waitSeconds   等待時(shí)間
     * @param process
     * @return
     */
    public boolean reentrantLock(String key, String value, long expireSeconds, long waitSeconds, Runnable process) {
        boolean lock = false;
        try {
            //特殊處理key,為了保證原key和計(jì)數(shù)key落在同一個(gè)slot，將原key拼裝成: key{key}
            String slotKey = String.format(KEY_FORMAT, key, key);
            long start = System.currentTimeMillis();
            while (!(lock = redisUtil.execute(reentrantLockRedisScript, Collections.singletonList(slotKey), value, expireSeconds) == 1)) {
                Thread.sleep(100);
                if ((System.currentTimeMillis() - start) / 1000 > waitSeconds) {
                    break;
                }
            }
            //加鎖成功，執(zhí)行傳入的方法，最后用lua腳本判斷鎖的value是否還是當(dāng)前的value，是則執(zhí)行解鎖
            if (lock) {
                try {
                    process.run();
                } catch (Exception ex) {
                    throw ex instanceof BusinessException ? ex : new BusinessException(ex.getMessage());
                } finally {
                    redisUtil.execute(releaseReentrantLockRedisScript, Collections.singletonList(slotKey), value);
                }
            }

        } catch (BusinessException businessException) {
            throw businessException;
        } catch (Exception e) {
            log.error("redis lockAndRun error!lockKey=" + key, e);
        }
        return lock;
    }

    /**
     * 先獲取可重入鎖，獲取成功后批量加鎖，執(zhí)行傳入的方法
     *
     * @param keys
     * @param reentrantKey
     * @param value
     * @param expireSeconds
     * @param waitSeconds
     * @param process
     * @return
     */
    public boolean batchReentrantLock(Set<String> keys, String reentrantKey, String value, long expireSeconds, long waitSeconds, Runnable process) {
        List<Boolean> result = new ArrayList<>(1);
        boolean reentrantLock = reentrantLock(reentrantKey, value, expireSeconds, waitSeconds, () -> {
            result.add(batchLockAndRun(keys, expireSeconds, waitSeconds, process));
        });
        return reentrantLock && result.get(0);
    }

	/**
	 * 使用redisTemplate
	 * @param script
	 * @param keys
	 * @param args
	 * @param <T>
	 */
	public List<Object> executePipelined(String[] keys, String[] values, long time, TimeUnit timeUnit) {
	      return redisTemplate.executePipelined(new SessionCallback<Object>() {
	           @Override
	           public Object execute(RedisOperations operations) throws DataAccessException {
	               for (int i = 0; i < keys.length; i++) {
	                   operations.opsForValue().setIfAbsent(keys[i], values[i], time, timeUnit);
	               }
	               return null;
	           }
	       });
	}
	
	/**
	 * pipeline批量加鎖
	 * @param keys          需要加鎖的key
	 * @param values        鎖的value，用于解鎖時(shí)判斷是否是當(dāng)前線程加的鎖
	 * @param expireSeconds 鎖過(guò)期時(shí)間
	 * @return boolean 是否加鎖成功
	 */
	private boolean tryBatchLock(String[] keys, String[] values, long expireSeconds) {
	    List<Object> results = redisUtil.executePipelined(keys, values, expireSeconds, TimeUnit.SECONDS);
	    if (results == null || results.size() != keys.length || results.contains(false)) {
	        //加鎖失敗，立即解鎖
	        redisUtil.executePipelined(releaseReentrantLockRedisScript, keys, values);
	        return false;
	    }
	    return true;
	}