阿里官方 Redis 开发规范

ugc:video:1

user:{uid}:friends:messages:{mid}简化为u:{uid}:fr:m:{mid}。

set user:1:name tomset user:1:age 19set user:1:favor football

hmset user:1 name tom age 19 favor football

执行命令如下：Jedis jedis = null;try {    jedis = jedisPool.getResource();    //具体的命令    jedis.executeCommand()} catch (Exception e) {    logger.error("op key {} error: " + e.getMessage(), key, e);} finally {    //注意这里不是关闭连接，在JedisPool模式下，Jedis会被归还给资源池。    if (jedis != null)        jedis.close();}

public void delBigHash(String host, int port, String password, String bigHashKey) {    Jedis jedis = new Jedis(host, port);    if (password != null && !"".equals(password)) {        jedis.auth(password);    }    ScanParams scanParams = new ScanParams().count(100);    String cursor = "0";    do {        ScanResult<Entry<String, String>> scanResult = jedis.hscan(bigHashKey, cursor, scanParams);        List<Entry<String, String>> entryList = scanResult.getResult();        if (entryList != null && !entryList.isEmpty()) {            for (Entry<String, String> entry : entryList) {                jedis.hdel(bigHashKey, entry.getKey());            }        }        cursor = scanResult.getStringCursor();    } while (!"0".equals(cursor));
    //删除bigkey    jedis.del(bigHashKey);}

public void delBigList(String host, int port, String password, String bigListKey) {    Jedis jedis = new Jedis(host, port);    if (password != null && !"".equals(password)) {        jedis.auth(password);    }    long llen = jedis.llen(bigListKey);    int counter = 0;    int left = 100;    while (counter < llen) {        //每次从左侧截掉100个        jedis.ltrim(bigListKey, left, llen);        counter += left;    }    //最终删除key    jedis.del(bigListKey);}

public void delBigSet(String host, int port, String password, String bigSetKey) {    Jedis jedis = new Jedis(host, port);    if (password != null && !"".equals(password)) {        jedis.auth(password);    }    ScanParams scanParams = new ScanParams().count(100);    String cursor = "0";    do {        ScanResult<String> scanResult = jedis.sscan(bigSetKey, cursor, scanParams);        List<String> memberList = scanResult.getResult();        if (memberList != null && !memberList.isEmpty()) {            for (String member : memberList) {                jedis.srem(bigSetKey, member);            }        }        cursor = scanResult.getStringCursor();    } while (!"0".equals(cursor));
    //删除bigkey    jedis.del(bigSetKey);}

public void delBigZset(String host, int port, String password, String bigZsetKey) {    Jedis jedis = new Jedis(host, port);    if (password != null && !"".equals(password)) {        jedis.auth(password);    }    ScanParams scanParams = new ScanParams().count(100);    String cursor = "0";    do {        ScanResult<Tuple> scanResult = jedis.zscan(bigZsetKey, cursor, scanParams);        List<Tuple> tupleList = scanResult.getResult();        if (tupleList != null && !tupleList.isEmpty()) {            for (Tuple tuple : tupleList) {                jedis.zrem(bigZsetKey, tuple.getElement());            }        }        cursor = scanResult.getStringCursor();    } while (!"0".equals(cursor));    //删除bigkey    jedis.del(bigZsetKey);}