Java Code Examples for redis.clients.jedis.Jedis#select()

/**
 * <p>
 * 通过key获取list指定下标位置的value
 * </p>
 * <p>
 * 如果start 为 0 end 为 -1 则返回全部的list中的value
 * </p>
 *
 * @param key
 * @param start
 * @param end
 * @return
 */
public List<String> lrange(String key, long start, long end, int indexdb) {
    Jedis jedis = null;
    List<String> res = null;
    try {
        jedis = jedisPool.getResource();
        jedis.select(indexdb);
        res = jedis.lrange(key, start, end);
    } catch (Exception e) {

        log.error(e.getMessage());
    } finally {
        returnResource(jedisPool, jedis);
    }
    return res;
}
 

public static void pingDaemonServer() {
	Jedis jedis = null;
	try {
		jedis = JedisConnectionPool.getJedisConnection();
		jedis.select(10);
		JsonObject status = new JsonObject();
		status.put("status", true);
		status.put("time", System.currentTimeMillis());
		jedis.hset(RedisKeyStore.HTTP.getMaster(), serverKey, status.toString());
		jedis.zadd(RedisKeyStore.HTTP + ":STATUS", 0, serverKey);
	} catch (Exception e) {
		e.printStackTrace();
	} finally {
		if (jedis != null)
			JedisConnectionPool.close(jedis);
	}
}
 

public boolean unLock(String key, String value) {
    Long RELEASE_SUCCESS = 1L;
    Jedis jedis = null;
    try {
        jedis = redisConnection.getJedis();
        jedis.select(dbIndex);
        key = KEY_PRE + key;
        String command = "if redis.call('get',KEYS[1])==ARGV[1] then return redis.call('del',KEYS[1]) else return 0 end";
        if (RELEASE_SUCCESS.equals(jedis.eval(command, Collections.singletonList(key), Collections.singletonList(value)))) {
            return true;
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (jedis != null) {
            jedis.close();
        }
    }
    return false;
}
 

/**
 * 设置超时时间
 *
 * @param dbIndex
 * @param key
 * @param unixTime
 * @return
 */
public static String expireAt(int dbIndex, String key, int unixTime) {
    String result = null;
    Jedis jedis = null;
    try {
        jedis = jedisManager.getJedis();
        jedis.select(dbIndex);
        result = String.valueOf(jedis.expireAt(key, unixTime));
    } catch (Exception e) {
        LOGGER.error(e.getMessage());
    } finally {
        jedis.close();
    }

    return result;
}
 

public static String deleteHashValue(int dbIndex, String key, String field) {
    String result = null;
    Jedis jedis = null;
    try {
        jedis = jedisManager.getJedis();
        jedis.select(dbIndex);

        result = jedis.hdel(key, field).toString();
    } catch (Exception e) {
        LOGGER.error(e.getMessage());
    } finally {
        jedis.close();
    }

    return result;
}
 

public Long ttl(String key) {
    log.trace("get set expire " + key);
    Jedis jedis = null;
    try {
        jedis = redisConnection.getJedis();
        jedis.select(dbIndex);
        return jedis.ttl(key);
    } catch (Exception e) {
        log.warn(e.getMessage(), e);
    } finally {
        if (jedis != null) {
            jedis.close();
        }
    }
    return -2L;
}
 

public boolean delObject(String key) {
    log.trace("strar delete cache with " + key);
    Jedis jedis = null;
    try {
        jedis = redisConnection.getJedis();
        jedis.select(dbIndex);
        return jedis.del(key.getBytes()) > 0;
    } catch (Exception e) {
        log.warn(e.getMessage(), e);
    } finally {
        if (jedis != null) {
            jedis.close();
        }
    }

    return false;
}
 

public static Set<String> getAll(int dbIndex, String pattern) {
    Set<String> result = null;
    Jedis jedis = null;
    try {
        jedis = jedisManager.getJedis();
        jedis.select(dbIndex);
        result = jedis.keys(pattern);
    } catch (Exception e) {
        LOGGER.error(e.getMessage());
    } finally {
        jedis.close();
    }
    return result;
}
 

public void clearObject() {

        Jedis jedis = null;
        try {
            jedis = redisConnection.getJedis();
            jedis.select(dbIndex);
            jedis.flushDB();
        } catch (Exception e) {
            log.warn(e.getMessage(), e);
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
    }
 

/**
 * get keys
 */
private Set<String> getKeys(RedisPools pool, RedisPoolProperty property, int database) {
  Optional<Jedis> jedisOpt = pool.getJedis(property);
  if (!jedisOpt.isPresent()) {
    return new HashSet<>(0);
  }

  Jedis jedis = jedisOpt.get();
  jedis.select(database);
  return jedis.keys("*");
}
 

@Test
public void startWithUrlString() {
  Jedis j = new Jedis("localhost", 6380);
  j.auth("foobared");
  j.select(2);
  j.set("foo", "bar");
  JedisPool pool = new JedisPool("redis://:foobared@localhost:6380/2");
  Jedis jedis = pool.getResource();
  assertEquals("PONG", jedis.ping());
  assertEquals("bar", jedis.get("foo"));
}
 

@Override
public <T> boolean loginContains(String key) throws IOException {
    Jedis jedis = pool.getResource();
    try {
        jedis.select(redisServer.getDatabase()+1);
        return jedis.exists(key);
    } finally {
        pool.returnResource(jedis);
    }
}
 

@Override
public <T> T loginGet(String key) throws IOException {
    Jedis jedis = pool.getResource();
    try {
        jedis.select(redisServer.getDatabase()+1);
        return (T) marshaller.objectFromByteBuffer(jedis.get(key.getBytes()));
    } finally {
        pool.returnResource(jedis);
    }
}
 

/**
 * <p>
 * 为给定 key 设置生存时间，当 key 过期时(生存时间为 0 )，它会被自动删除。
 * </p>
 *
 * @param key
 * @param value
 *            过期时间，单位：秒
 * @return 成功返回1 如果存在 和 发生异常 返回 0
 */
public Long expire(String key, int value, int indexdb) {
    Jedis jedis = null;
    try {
        jedis = jedisPool.getResource();
        jedis.select(indexdb);
        return jedis.expire(key, value);
    } catch (Exception e) {
        log.error(e.getMessage());
        return 0L;
    } finally {
        returnResource(jedisPool, jedis);
    }
}
 

@Override
public <T> void loginDelete(String key) throws IOException {
    Jedis jedis = pool.getResource();
    try {
        jedis.select(redisServer.getDatabase()+1);
        jedis.del(key.getBytes());
    } finally {
        pool.returnResource(jedis);
    }
}
 

/**
 * <p>
 * 删除指定的key,也可以传入一个包含key的数组
 * </p>
 * @param indexdb 选择redis库 0-15
 * @param keys 一个key 也可以使 string 数组
 * @return 返回删除成功的个数
 */
public Long del(int indexdb,String... keys) {
    Jedis jedis = null;
    try {
        jedis = jedisPool.getResource();
        jedis.select(indexdb);
        return jedis.del(keys);
    } catch (Exception e) {

        log.error(e.getMessage());
        return 0L;
    } finally {
        returnResource(jedisPool, jedis);
    }
}
 

@Override
@SuppressWarnings("unchecked")
public <T> T get(String key) throws IOException {
    //logger.debug("@@@@@@@@@@@@@ cache.size=" + cache.size());
    Jedis jedis = pool.getResource();
    try {

        jedis.select(redisServer.getDatabase());
        return (T) marshaller.objectFromByteBuffer(jedis.get(key.getBytes()));
    } finally {
        pool.returnResource(jedis);
    }
    //return (T) cache.get(key);
}
 

public static long delete(int dbIndex, String key) {
    long result = -1;
    Jedis jedis = null;
    try {
        jedis = jedisManager.getJedis();
        jedis.select(dbIndex);
        result = jedis.del(key);
    } catch (Exception e) {
        LOGGER.error(e.getMessage());
    } finally {
        jedis.close();
    }

    return result;
}
 

public Jedis getJedis(int dbIndex) {
	Jedis jedis = getJedisPool().getResource();
	if (jedis.getDB() != dbIndex) {
		jedis.select(dbIndex);
	}
	return jedis;
}
 

public static String getStr(int dbIndex, String key) {
    String result = null;
    Jedis jedis = null;
    try {
        jedis = jedisManager.getJedis();
        jedis.select(dbIndex);
        result = jedis.get(key);
    } catch (Exception e) {
        LOGGER.error(e.getMessage());
    } finally {
        jedis.close();
    }
    return result;
}