Java Code Examples for redis.clients.jedis.ZParams#weightsByDouble()

The following examples show how to use redis.clients.jedis.ZParams#weightsByDouble() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: RedisRaterLimiter.java    From sk-admin with Apache License 2.0 4 votes vote down vote up 
public String acquireTokenFromBucket(String point, int limit, long timeout) {

        try (Jedis jedis = jedisPool.getResource()) {
            //UUID令牌
            String token = UUID.randomUUID().toString();
            long now = System.currentTimeMillis();
            //开启事务
            Transaction transaction = jedis.multi();

            //删除信号量 移除有序集中指定区间(score)内的所有成员 ZREMRANGEBYSCORE key min max
            transaction.zremrangeByScore((BUCKET_MONITOR + point).getBytes(), "-inf".getBytes(), String.valueOf(now - timeout).getBytes());
            //为每个有序集分别指定一个乘法因子(默认设置为 1) 每个成员的score值在传递给聚合函数之前都要先乘以该因子
            ZParams params = new ZParams();
            params.weightsByDouble(1.0, 0.0);
            //计算给定的一个或多个有序集的交集
            transaction.zinterstore(BUCKET + point, params, BUCKET + point, BUCKET_MONITOR + point);

            //计数器自增
            transaction.incr(BUCKET_COUNT);
            List<Object> results = transaction.exec();
            long counter = (Long) results.get(results.size() - 1);

            transaction = jedis.multi();
            //Zadd 将一个或多个成员元素及其分数值(score)加入到有序集当中
            transaction.zadd(BUCKET_MONITOR + point, now, token);
            transaction.zadd(BUCKET + point, counter, token);
            transaction.zrank(BUCKET + point, token);
            results = transaction.exec();
            //获取排名，判断请求是否取得了信号量
            long rank = (Long) results.get(results.size() - 1);
            if (rank < limit) {
                return token;
            } else {
                //没有获取到信号量，清理之前放入redis中垃圾数据
                transaction = jedis.multi();
                //Zrem移除有序集中的一个或多个成员
                transaction.zrem(BUCKET_MONITOR + point, token);
                transaction.zrem(BUCKET + point, token);
                transaction.exec();
            }
        } catch (Exception e) {
            log.error("限流出错，请检查 Redis 运行状态\n" + e.toString());
        }
        return null;
    }
Example 2
Source File: RedisRaterLimiter.java    From BigDataPlatform with GNU General Public License v3.0 4 votes vote down vote up 
public String acquireTokenFromBucket(String point, int limit, long timeout) {

        Jedis jedis = jedisPool.getResource();
        try{
            //UUID令牌
            String token = UUID.randomUUID().toString();
            long now = System.currentTimeMillis();
            //开启事务
            Transaction transaction = jedis.multi();

            //删除信号量 移除有序集中指定区间(score)内的所有成员 ZREMRANGEBYSCORE key min max
            transaction.zremrangeByScore((BUCKET_MONITOR + point).getBytes(), "-inf".getBytes(), String.valueOf(now - timeout).getBytes());
            //为每个有序集分别指定一个乘法因子(默认设置为 1) 每个成员的score值在传递给聚合函数之前都要先乘以该因子
            ZParams params = new ZParams();
            params.weightsByDouble(1.0, 0.0);
            //计算给定的一个或多个有序集的交集
            transaction.zinterstore(BUCKET + point, params, BUCKET + point, BUCKET_MONITOR + point);

            //计数器自增
            transaction.incr(BUCKET_COUNT);
            List<Object> results = transaction.exec();
            long counter = (Long) results.get(results.size() - 1);

            transaction = jedis.multi();
            //Zadd 将一个或多个成员元素及其分数值(score)加入到有序集当中
            transaction.zadd(BUCKET_MONITOR + point, now, token);
            transaction.zadd(BUCKET + point, counter, token);
            transaction.zrank(BUCKET + point, token);
            results = transaction.exec();
            //获取排名，判断请求是否取得了信号量
            long rank = (Long) results.get(results.size() - 1);
            if (rank < limit) {
                return token;
            } else {
                //没有获取到信号量，清理之前放入redis中垃圾数据
                transaction = jedis.multi();
                //Zrem移除有序集中的一个或多个成员
                transaction.zrem(BUCKET_MONITOR + point, token);
                transaction.zrem(BUCKET + point, token);
                transaction.exec();
            }
        }catch (Exception e){
            log.error("限流出错"+e.toString());
        }finally {
            if(jedis!=null){
                jedis.close();
            }
        }
        return null;
    }