CgwMonitorManage.eLTE.eLTEVideoMonitor.GetAllCameras C# (CSharp) Method

        public SmcError.SmcErr GetAllCameras(out List<Camera> cameraList, out List<CameraGroup> groupList, out List<NodeRelation> nodeRelationList)
        {
            NLogEx.LoggerEx logEx = new NLogEx.LoggerEx(log);
            logEx.Trace("Enter: eLTEVideoMonitor.GetAllCameras().");
            SmcErr err = new CgwError();
            cameraList = new List<Camera>();
            groupList = new List<CameraGroup>();
            nodeRelationList = new List<NodeRelation>();

            isGetDevicesFinish = false;
            if (this.cameraOperateLock.TryEnterReadLock(CgwConst.ENTER_LOCK_WAIT_TIME))
            {
                try
                {
                    #region 深度克隆数据
                    foreach (Camera ivsCamera in this.cameraList)
                    {
                        //从缓存获取                        
                        Camera camera = new Camera(ivsCamera.No, ivsCamera.Name);

                        try
                        {
                            if (this.cameraStatusOperateLock.TryEnterReadLock(CgwConst.ENTER_LOCK_WAIT_TIME))
                            {
                                camera.Status = onlineUser.Exists((x) =>
                                {
                                    if (x == camera.No)
                                    {
                                        return true;
                                    }
                                    else
                                    {
                                        return false;
                                    }
                                }) == true ? CameraStatus.Online : CameraStatus.Offline;
                            }
                        }
                        finally
                        {
                            this.cameraStatusOperateLock.ExitReadLock();
                        }
                        cameraList.Add(camera);
                    }
                    foreach (CameraGroup cameraGroup in this.groupList)
                    {
                        CameraGroup cameraGroupTemp = new CameraGroup(cameraGroup.No, cameraGroup.Name);
                        groupList.Add(cameraGroupTemp);
                    }
                    foreach (NodeRelation nodeRelation in this.nodeRelationList)
                    {
                        NodeRelation nodeRelationTemp = new NodeRelation(nodeRelation.No, nodeRelation.Path, nodeRelation.Type);
                        nodeRelationList.Add(nodeRelationTemp);
                    }
                    #endregion
                }
                catch (Exception e)
                {
                    err.SetErrorNo(CgwError.GET_ALL_CAMERAS_FAILED);
                    logEx.Error("Get all cameras failed.Execption message:{0}", e.Message);
                    return err;
                }
                finally
                {
                    this.cameraOperateLock.ExitReadLock();
                }
            }

            logEx.Info("Get all cameras success.");
            return err;
        }