J2Cache 死循环

Question

net.oschina.j2cache.redis.RedisGenericCache#keys(redis.clients.jedis.BinaryJedisCommands)

private Collection<String> keys(BinaryJedisCommands cmd) {
    Collection<String> keys = new ArrayList();
    String cursor = "0";
    ScanParams params = new ScanParams();
    params.match(this.region + ":*").count(this.scanCount);
    List partKeys = null;

    do {
        ScanResult<String> scanResult = ((MultiKeyCommands)cmd).scan(cursor, params);
        partKeys = scanResult.getResult();
        if (partKeys != null) {
            keys.addAll(partKeys);
            cursor = scanResult.getStringCursor();
        }
    } while(partKeys != null && partKeys.size() != 0);

    return keys;
}

当partKeys 获取到值后就死循环了。

Answer 1

建议先了解下 redis 的 scan 命令，然后你就懂为什么要这么写了