pipeline通道大幅度提升redis的处理速度

pipeline通道大幅度提升redis的处理速度

    @Autowired
    StringRedisTemplate stringRedisTemplate;  //操作k-v都是字符串的

    public void saveFaceLocationInfo(List faceLocationList) {
        if (faceLocationList == null || faceLocationList.size() <= 0) {
            return;
        }
        String currentTime = String.valueOf(System.currentTimeMillis());
        //pipeline通道大幅度提升redis的处理速度
        stringRedisTemplate.executePipelined(new RedisCallback() {
            @Override
            public String doInRedis(RedisConnection connection) throws DataAccessException {
                for (FaceLocation faceLocation : faceLocationList) {
                    String rKey = "new_"+faceLocation.getVnumber();
                    String flagValue = String.valueOf(connection.hGet(rKey.getBytes(), "flag".getBytes()));
                    //设备第一次上线、或者之前下线了，则对endtime更新
                    if(flagValue==null||"0".equals(flagValue)){
                        connection.hSet(rKey.getBytes(),"endtime".getBytes(),faceLocation.getTime().getBytes());
                    }
                    connection.hSet(rKey.getBytes(), "info".getBytes(), JSON.toJSONString(faceLocation).getBytes());
                    connection.hSet(rKey.getBytes(), "flag".getBytes(),"1".getBytes());
                    connection.hSet(rKey.getBytes(), "intime".getBytes(),currentTime.getBytes());
                }
                return null;
            }
        });
    }