//aggregatorFunction used in TimeWindow based aggregation
private static HeatMapData aggregatorFunction(HeatMapData seed, TimeInCell curr,
IList <TimeInCell> expList, long count)
{
HeatMapData new_seed = new HeatMapData {
ts = curr.ts, player_name = curr.player_name,
gridType = curr.gridType, heatmap = seed.heatmap
};
foreach (var item in expList)
{
if (item.time_in_cell != -999)
{
if (new_seed.heatmap.ContainsKey(item.prev_index))
{
new_seed.heatmap[item.prev_index] -= item.time_in_cell;
if (new_seed.heatmap[item.prev_index] <= 0)
{
new_seed.heatmap.Remove(item.prev_index);
}
}
else
{
Console.WriteLine("HeatMapProcessor: Attempt to access non-existent key");
}
}
}
if (curr.time_in_cell != -999)
{
if (new_seed.heatmap.ContainsKey(curr.prev_index))
{
new_seed.heatmap[curr.prev_index] += curr.time_in_cell;
}
else
{
new_seed.heatmap.Add(curr.prev_index, curr.time_in_cell);
}
}
return(new_seed);
}
public static void computeHeatMap(IList<IObservable<PlayerData>> src,Subject<HeatMapData> heatMapSub)
{
//tracks PerformanceTest instance for a player stream in src.
int pt_index = 0;
foreach (var strm in src)
{
//obtain PerformanceTest instance for this player stream from PerformanceTest.ptArray.
var pt = PerformanceTest.ptArray[pt_index]; pt_index++;
strm
.ObserveOn(Scheduler.Default)
//if HeatMapStatus==true, then compute performance metrics for HeatMap Processor
.DoIf(() => PerformanceTest.HeatMapStatus, d =>
{
//records time of arrival of PlayerData sample on this player stream
pt.recordTime();
})
.SelectMany(pData =>
{
//correct x and y co-ordinates of playerdata.
double x = pData.pos_x < 0 ? 0 : pData.pos_x;
double y = pData.pos_y + MetaData.Y_OFFSET;
if (y < 0)
y = y * -1;
//for each player's position find out the grid_cell index that the
//player is in for each of the 4 grid_dimensions.
List<GridInfo> output = new List<GridInfo>();
for (int i = 0; i < 4; i++)
{
int x_row = (int)Math.Ceiling(x / (MetaData.LEN_X / MetaData.X_DIM[i]));
int y_col = (int)Math.Ceiling(y / (MetaData.LEN_Y / MetaData.Y_DIM[i]));
output.Add(new GridInfo
{
gridType = i,
player_name = pData.player_name,
ts = pData.ts,
index = (x_row - 1) + (y_col - 1) * MetaData.X_DIM[i],
});
}
return output;
})
//groupby on both gridType and player_name fields
.GroupBy(d => d.gridType)
.Subscribe(player_grid_stream =>
{
player_grid_stream
.Scan(new TimeInCell
{
ts = -1,
player_name = "",
gridType = -1,
prev_index = -1,
time_in_cell = -999,
curr_index = -1,
},
(seed, curr) =>
{
//This function calculates the time for which the player was in gird_cell prev_index
//as observed at timestamp ts when player is in grid_cell curr_index
TimeInCell new_seed = new TimeInCell
{
ts = curr.ts,
player_name = curr.player_name,
gridType = curr.gridType,
prev_index = seed.curr_index,
curr_index = curr.index,
time_in_cell = -999
};
if (new_seed.prev_index == -1)
new_seed.prev_index = curr.index;
else
{
new_seed.time_in_cell = (curr.ts - seed.ts)
/ MetaData.PICO_TO_MILI;
}
return new_seed;
})
//computes heatMapData for the timeframe of 5 seconds.
.TimeWindowForTsDataAggregate(5 * MetaData.SECOND_TO_PICO, "ts",
new HeatMapData
{
ts = -1,
player_name = "",
gridType = -1,
heatmap = new Dictionary<int, double>()
},
aggregatorFunction)
.DoIf(() => PerformanceTest.HeatMapStatus, d =>
{
//computes time taken to process input PlayerData sample into a HeatMap output sample
pt.computeMetrics();
})
.Subscribe(heatMapSub);
});
}
}
public static void computeHeatMap(IList <IObservable <PlayerData> > src, Subject <HeatMapData> heatMapSub)
{
//tracks PerformanceTest instance for a player stream in src.
int pt_index = 0;
foreach (var strm in src)
{
//obtain PerformanceTest instance for this player stream from PerformanceTest.ptArray.
var pt = PerformanceTest.ptArray[pt_index]; pt_index++;
strm
.ObserveOn(Scheduler.Default)
//if HeatMapStatus==true, then compute performance metrics for HeatMap Processor
.DoIf(() => PerformanceTest.HeatMapStatus, d =>
{
//records time of arrival of PlayerData sample on this player stream
pt.recordTime();
})
.SelectMany(pData =>
{
//correct x and y co-ordinates of playerdata.
double x = pData.pos_x < 0 ? 0 : pData.pos_x;
double y = pData.pos_y + MetaData.Y_OFFSET;
if (y < 0)
{
y = y * -1;
}
//for each player's position find out the grid_cell index that the
//player is in for each of the 4 grid_dimensions.
List <GridInfo> output = new List <GridInfo>();
for (int i = 0; i < 4; i++)
{
int x_row = (int)Math.Ceiling(x / (MetaData.LEN_X / MetaData.X_DIM[i]));
int y_col = (int)Math.Ceiling(y / (MetaData.LEN_Y / MetaData.Y_DIM[i]));
output.Add(new GridInfo
{
gridType = i,
player_name = pData.player_name,
ts = pData.ts,
index = (x_row - 1) + (y_col - 1) * MetaData.X_DIM[i],
});
}
return(output);
})
//groupby on both gridType and player_name fields
.GroupBy(d => d.gridType)
.Subscribe(player_grid_stream =>
{
player_grid_stream
.Scan(new TimeInCell
{
ts = -1,
player_name = "",
gridType = -1,
prev_index = -1,
time_in_cell = -999,
curr_index = -1,
},
(seed, curr) =>
{
//This function calculates the time for which the player was in gird_cell prev_index
//as observed at timestamp ts when player is in grid_cell curr_index
TimeInCell new_seed = new TimeInCell
{
ts = curr.ts,
player_name = curr.player_name,
gridType = curr.gridType,
prev_index = seed.curr_index,
curr_index = curr.index,
time_in_cell = -999
};
if (new_seed.prev_index == -1)
{
new_seed.prev_index = curr.index;
}
else
{
new_seed.time_in_cell = (curr.ts - seed.ts)
/ MetaData.PICO_TO_MILI;
}
return(new_seed);
})
//computes heatMapData for the timeframe of 5 seconds.
.TimeWindowForTsDataAggregate(5 * MetaData.SECOND_TO_PICO, "ts",
new HeatMapData
{
ts = -1,
player_name = "",
gridType = -1,
heatmap = new Dictionary <int, double>()
},
aggregatorFunction)
.DoIf(() => PerformanceTest.HeatMapStatus, d =>
{
//computes time taken to process input PlayerData sample into a HeatMap output sample
pt.computeMetrics();
})
.Subscribe(heatMapSub);
});
}
}
//aggregatorFunction used in TimeWindow based aggregation
private static HeatMapData aggregatorFunction(HeatMapData seed, TimeInCell curr,
IList<TimeInCell> expList, long count)
{
HeatMapData new_seed = new HeatMapData { ts = curr.ts, player_name = curr.player_name,
gridType=curr.gridType, heatmap = seed.heatmap};
foreach(var item in expList)
{
if (item.time_in_cell != -999)
{
if (new_seed.heatmap.ContainsKey(item.prev_index))
{
new_seed.heatmap[item.prev_index] -= item.time_in_cell;
if (new_seed.heatmap[item.prev_index] <= 0)
new_seed.heatmap.Remove(item.prev_index);
}
else
{
Console.WriteLine("HeatMapProcessor: Attempt to access non-existent key");
}
}
}
if (curr.time_in_cell != -999)
{
if (new_seed.heatmap.ContainsKey(curr.prev_index))
new_seed.heatmap[curr.prev_index] += curr.time_in_cell;
else
new_seed.heatmap.Add(curr.prev_index, curr.time_in_cell);
}
return new_seed;
}