/// <summary>
        /// Read Through Cache
        /// </summary>
        /// <param name="getParams"></param>
        /// <returns></returns>
        private ClusterMarkersResponse GetMarkersHelper(GetMarkersParams getParams)
        {
            try
            {
                var neLat     = getParams.NorthEastLatitude;
                var neLong    = getParams.NorthEastLongitude;
                var swLat     = getParams.SouthWestLatitude;
                var swLong    = getParams.SouthWestLongitude;
                var zoomLevel = getParams.ZoomLevel;
                var filter    = getParams.Filter ?? "";

                // values are validated there
                var markersInput = new MarkersInput(neLat, neLong, swLat, swLong, zoomLevel, filter);

                var grid           = GridCluster.GetBoundaryExtended(markersInput);
                var cacheKeyHelper = string.Format("{0}_{1}_{2}", markersInput.Zoomlevel, markersInput.FilterHashCode(), grid.GetHashCode());
                var cacheKey       = CacheKeys.GetMarkers(cacheKeyHelper.GetHashCode());

                var response = new ClusterMarkersResponse();

                markersInput.Viewport.ValidateLatLon(); // Validate google map viewport input (should be always valid)
                markersInput.Viewport.Normalize();

                // Get all points from memory
                IList <MapPoint> points = _pointCollection.Get(getParams.PointType); // _pointsDatabase.GetPoints();

                // Filter points
                points = FilterUtil.FilterByType(
                    points,
                    new FilterData {
                    TypeFilterExclude = markersInput.TypeFilterExclude
                }
                    );



                // Create new instance for every ajax request with input all points and json data
                var clusterAlgo = new GridCluster(points, markersInput);

                var clusteringEnabled = markersInput.IsClusteringEnabled ||
                                        GmcConfiguration.Get.AlwaysClusteringEnabledWhenZoomLevelLess > markersInput.Zoomlevel;

                // Clustering
                if (clusteringEnabled && markersInput.Zoomlevel < GmcConfiguration.Get.ZoomlevelClusterStop)
                {
                    IList <MapPoint> markers = clusterAlgo.RunCluster();

                    response = new ClusterMarkersResponse
                    {
                        Markers   = markers,
                        Polylines = clusterAlgo.GetPolyLines()
                    };
                }
                else
                {
                    // If we are here then there are no clustering
                    // The number of items returned is restricted to avoid json data overflow
                    IList <MapPoint> filteredDataset          = FilterUtil.FilterDataByViewport(points, markersInput.Viewport);
                    IList <MapPoint> filteredDatasetMaxPoints = filteredDataset.Take(GmcConfiguration.Get.MaxMarkersReturned).ToList();

                    response = new ClusterMarkersResponse
                    {
                        Markers   = filteredDatasetMaxPoints,
                        Polylines = clusterAlgo.GetPolyLines(),
                        Mia       = filteredDataset.Count - filteredDatasetMaxPoints.Count,
                    };
                }

                // if client ne and sw is inside a specific grid box then cache the grid box and the result
                // next time test if ne and sw is inside the grid box and return the cached result
                if (GmcConfiguration.Get.CacheServices)
                {
                    _memCache.Set(cacheKey, response, TimeSpan.FromMinutes(10)); // cache data
                }
                return(response);
            }
            catch (Exception ex)
            {
                return(new ClusterMarkersResponse
                {
                    OperationResult = "0",
                    ErrorMessage = string.Format("MapService says: exception {0}", ex.Message)
                });
            }
        }
예제 #2
0
        /// <summary>
        /// Read Through Cache
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public JsonMarkersReply GetMarkersHelper(JsonGetMarkersInput input)
        {
            try
            {
                var nelat     = Math.Round(input.nelat.ToDouble(), Numbers.Round);
                var nelon     = Math.Round(input.nelon.ToDouble(), Numbers.Round);
                var swlat     = Math.Round(input.swlat.ToDouble(), Numbers.Round);
                var swlon     = Math.Round(input.swlon.ToDouble(), Numbers.Round);
                var zoomLevel = int.Parse(input.zoomLevel);
                var filter    = input.filter ?? "";

                // values are validated there
                var inputValidated = new JsonGetMarkersReceive(nelat, nelon, swlat, swlon, zoomLevel, filter);

                var grid           = GridCluster.GetBoundaryExtended(inputValidated);
                var cacheKeyHelper = string.Format("{0}_{1}_{2}", inputValidated.Zoomlevel, inputValidated.FilterHashCode(), grid.GetHashCode());
                var cacheKey       = CacheKeys.GetMarkers(cacheKeyHelper.GetHashCode());

                var reply = _memCache.Get <JsonMarkersReply>(cacheKey);
                if (reply != null)
                {
                    // return cached data
                    reply.Cache = true;
                    return(reply);
                }

                inputValidated.Viewport.ValidateLatLon();                 // Validate google map viewport input (should be always valid)
                inputValidated.Viewport.Normalize();

                // Get all points from memory
                IList <P> points = _pointsDatabase.GetPoints();

                #region fiter

                // Filter points
                points = FilterUtil.FilterByType(
                    points,
                    new FilterData {
                    TypeFilterExclude = inputValidated.TypeFilterExclude
                }
                    );

                #endregion filter


                // Create new instance for every ajax request with input all points and json data
                ICluster clusterAlgo = new GridCluster(points, inputValidated);

                var clusteringEnabled = inputValidated.IsClusteringEnabled ||
                                        GmcSettings.Get.AlwaysClusteringEnabledWhenZoomLevelLess > inputValidated.Zoomlevel;

                // Clustering
                if (clusteringEnabled && inputValidated.Zoomlevel < GmcSettings.Get.ZoomlevelClusterStop)
                {
                    #region cluster

                    IList <P> markers = clusterAlgo.RunCluster();

                    #endregion cluster

                    reply = new JsonMarkersReply
                    {
                        Markers   = markers,
                        Polylines = clusterAlgo.GetPolyLines(),
                    };
                }
                else
                {
                    // If we are here then there are no clustering
                    // The number of items returned is restricted to avoid json data overflow
                    IList <P> filteredDataset          = FilterUtil.FilterDataByViewport(points, inputValidated.Viewport);
                    IList <P> filteredDatasetMaxPoints = filteredDataset.Take(GmcSettings.Get.MaxMarkersReturned).ToList();

                    reply = new JsonMarkersReply
                    {
                        Markers   = filteredDatasetMaxPoints,
                        Polylines = clusterAlgo.GetPolyLines(),
                        Mia       = filteredDataset.Count - filteredDatasetMaxPoints.Count,
                    };
                }

                // if client ne and sw is inside a specific grid box then cache the grid box and the result
                // next time test if ne and sw is inside the grid box and return the cached result
                if (GmcSettings.Get.CacheServices)
                {
                    _memCache.Set(reply, cacheKey, TimeSpan.FromMinutes(10));                                               // cache data
                }
                return(reply);
            }
            catch (Exception ex)
            {
                return(new JsonMarkersReply
                {
                    Ok = "0",
                    EMsg = string.Format("MapService says: exception {0}", ex.Message)
                });
            }
        }