2025-11-8 zwy 优化websocket代码,在最后一个订阅视频的用户断开后,机场停止视频直播

zhaowenyu

2025-11-12 677748a0508a91f9423cae558f1bdee5d83ac131

 ard-sample/src/main/java/com/ard/sample/component/websocket/handler/LiveStreamHandler.java

@@ -20,103 +20,67 @@
@Component
public class LiveStreamHandler {
    @Autowired
    protected ObjectMapper _objectMapper;
    @Autowired
    private IDeviceService _deviceService;

    @Autowired
    private ILiveStreamService _liveStreamService;

    @Autowired
    private DockWebSocketHandler _dockWebSocketHandler;

    @Autowired
    protected ObjectMapper _objectMapper;

    /**
     * 开启直播
     */
    public void StartLiveStreaming(String sn) {
        // 检查设备是否在线
        if (!_deviceService.checkDeviceOnline(sn)) {
            String jsonString = getResult(sn, "设备不在线，请检查网络连接！");
            _dockWebSocketHandler.sendMessageToSubscribers(sn, MessageType.LIVESTREAM.getType(), jsonString);
            return;
        }
        // 读取直播能力拼接参数
        List<CapacityDeviceDTO> devicesList = _liveStreamService.getLiveCapacity();
        if (devicesList == null || devicesList.isEmpty()) {
            String jsonString = getResult(sn, "未获得设备直播能力！");
            _dockWebSocketHandler.sendMessageToSubscribers(sn, MessageType.LIVESTREAM.getType(), jsonString);
            return;
        }
        for (CapacityDeviceDTO device : devicesList) {
            if (!device.getSn().equals(sn)) {
                continue;
            }
            List<CapacityCameraDTO> camerasList = device.getCamerasList();
            for (CapacityCameraDTO camera : camerasList) {
                if (camera.getName()==null || camera.getName().isEmpty()) {
                    continue;
                }
                LiveTypeDTO param = new LiveTypeDTO();
                String videoid = device.getSn() + "/" + camera.getIndex();
                List<CapacityVideoDTO> videosList = camera.getVideosList();
                for (CapacityVideoDTO video : videosList) {
                    videoid = videoid + "/" + video.getIndex();
                    param.setUrlType(1);
                    param.setUrl("");
                    param.setVideoId(videoid);
                    param.setVideoQuality(1);
                    param.setVideoType(video.getSwitchVideoTypes().get(0));
                    //调用开始直播
                    ResponseResult rlive = null;
                    String resultLive = "";
                    try {
                        rlive = _liveStreamService.liveStart(param);
                        if (rlive != null) {
                            if (rlive.getCode() == 513003) {
                                _liveStreamService.liveStop(param.getVideoId());
                                System.out.println("相机已经在直播中，关闭直播后重启直播！");
                                rlive = _liveStreamService.liveStart(param);
                            }
                            if(rlive.getCode() == 0){
                                // 直播成功后，在redis中存一个标记，将videoid保留，留给停止直播使用
                                System.out.println("开启直播成功！");
                                RedisOpsUtils.setWithExpire(RedisConst.WEBSOCKET_VideoId_PREFIX + sn, param.getVideoId(), RedisConst.WEBSOCKET_ALIVE_SECOND);
                                rlive.setGateway(sn);
                            }
                        }
                        rlive.setType(MessageType.LIVESTREAM.getType());
                        resultLive = _objectMapper.writeValueAsString(rlive);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    _dockWebSocketHandler.sendMessageToSubscribers(sn, MessageType.LIVESTREAM.getType(), resultLive);
                    break;
        //调用开始直播
        ResponseResult rlive = null;
        String resultLive = "";
        try {
            // 获取直播参数
            LiveTypeDTO param = getLiveParam(sn);
            // 如果存在直播则读取直播地址返回
            if (RedisOpsUtils.checkExist(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn)) {
                resultLive = String.valueOf(RedisOpsUtils.get(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn));
            } else {
                log.info("SN: {}-redis中未找到相机的播放地址信息！停止直播后再开启直播", sn);
                StopLiveStreaming(sn);
                // 如果不存在直播，则开始直播，并返回直播地址
                rlive = _liveStreamService.liveStart(param);
                if (rlive.getCode() == 0) {
                    // 直播成功后，在redis中存一个标记，将videoid保留，留给停止直播使用
                    log.info("SN: {}-开启直播成功！", sn);
                    rlive.setGateway(sn);
                    rlive.setType(MessageType.LIVESTREAM.getType());
                    resultLive = _objectMapper.writeValueAsString(rlive);
                    RedisOpsUtils.set(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn, resultLive);
                }
            }
            _dockWebSocketHandler.sendMessageToSubscribers(sn, MessageType.LIVESTREAM.getType(), resultLive);
            log.info("SN: {}-直播地址：{}", sn, resultLive);
        } catch (Exception e) {
            log.info("SN: {}-开启直播失败！原因：{}", sn, e.getMessage());
            e.printStackTrace();
        }
    }

    public void StopLiveStreaming(String sn) {
        // 停止直播逻辑
        ResponseResult rlive = null;
        String resultLive = "";
//        System.out.println("关闭直播");
        String videoid = "";
        if(!RedisOpsUtils.checkExist(RedisConst.WEBSOCKET_VideoId_PREFIX + sn)){
            resultLive = getResult(sn, "未找到正在直播的相机！");
//        String resultLive = "";
        try {
            // 获取直播参数
            LiveTypeDTO param = getLiveParam(sn);
            // 停止直播逻辑
            rlive = _liveStreamService.liveStop(param.getVideoId());
//            rlive.setGateway(sn);
//            rlive.setType(MessageType.LIVESTREAM.getType());
//            resultLive = _objectMapper.writeValueAsString(rlive);
            RedisOpsUtils.del(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn);
            log.info("SN: {}-停止直播，并删除redis直播信息！", sn);
        } catch (Exception e) {
            log.info("SN: {}-停止直播时发生异常，原因：{}", sn,e.getMessage());
            e.printStackTrace();
        }
        else {
            videoid = String.valueOf(RedisOpsUtils.get(RedisConst.WEBSOCKET_VideoId_PREFIX + sn));
            try {
                rlive = _liveStreamService.liveStop(videoid);
                rlive.setGateway(sn);
                resultLive = _objectMapper.writeValueAsString(rlive);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        _dockWebSocketHandler.sendMessageToSubscribers(sn, MessageType.LIVESTREAM.getType(), resultLive);
        // 停止直播不返回数据，直接删除redis中的直播地址标记即可；并且方法在websocket连接断开后执行。
    }

    public String getResult(String sn, String msg) {
@@ -136,4 +100,46 @@

        return jsonString;
    }

    /**
     * 获取直播参数
     */
    public LiveTypeDTO getLiveParam(String sn) throws Exception {
        LiveTypeDTO param = new LiveTypeDTO();
        // 检查设备是否在线
        if (!_deviceService.checkDeviceOnline(sn)) {
            log.info("SN: {}-设备不在线，请检查网络连接！", sn);
            // 抛弃出异常，给调用者处理
            throw new Exception("设备不在线，请检查网络连接！");
        }
        // 读取直播能力拼接参数
        List<CapacityDeviceDTO> devicesList = _liveStreamService.getLiveCapacity();
        if (devicesList == null || devicesList.isEmpty()) {
            log.info("SN: {}-未获得设备直播能力！", sn);
            // 抛弃出异常，给调用者处理
            throw new Exception("未获得设备直播能力！");
        }
        for (CapacityDeviceDTO device : devicesList) {
            if (!device.getSn().equals(sn)) {
                continue;
            }
            List<CapacityCameraDTO> camerasList = device.getCamerasList();
            for (CapacityCameraDTO camera : camerasList) {
                if (camera.getName() == null || camera.getName().isEmpty()) {
                    continue;
                }
                String videoid = device.getSn() + "/" + camera.getIndex();
                List<CapacityVideoDTO> videosList = camera.getVideosList();
                for (CapacityVideoDTO video : videosList) {
                    videoid = videoid + "/" + video.getIndex();
                    param.setUrlType(1);
                    param.setUrl("");
                    param.setVideoId(videoid);
                    param.setVideoQuality(1);
                    param.setVideoType(video.getSwitchVideoTypes().get(0));
                }
            }
        }
        return param;
    }
}