private static void BenchmarkSearch(ISpatialIndex index, int rounds)
{
var query = new KnnQuery
{
Coordinate = new GeoCoordinate(52.3667, 4.900),
MaxDistance = 10000,
MaxResults = 15
};
Console.Write("Searching top {0} within {1} m from [{2}] .. ", query.MaxResults, query.MaxDistance, query.Coordinate);
var total = 0L;
var timer = new Stopwatch();
for (int i = rounds; i > 0; i--)
{
timer.Restart();
index.KnnSearch(query);
timer.Stop();
total += timer.ElapsedMilliseconds;
}
Console.WriteLine("ok ({0} ms)", total / rounds);
}
private static void BenchmarkSearch(ISpatialIndex index, int rounds)
{
var query = new KnnQuery
{
Coordinate = new GeoCoordinate(52.3667, 4.900),
MaxDistance = 10000,
MaxResults = 15
};
Console.Write("Searching top {0} within {1} m from [{2}] .. ", query.MaxResults, query.MaxDistance, query.Coordinate);
var total = 0L;
var timer = new Stopwatch();
for (int i = rounds; i > 0; i--)
{
timer.Restart();
index.KnnSearch(query);
timer.Stop();
total += timer.ElapsedMilliseconds;
}
Console.WriteLine("ok ({0} ms)", total / rounds);
}
public LocationSearchResults Search(LocationSearchRequest search)
{
// TODO: validate search parameter
var query = new KnnQuery
{
Coordinate = search.Coordinate,
MaxDistance = search.MaxDistance,
MaxResults = search.MaxResults
};
// use spatial index to reduce data set
var knnQueryResult = _spatialIndex.KnnSearch(query);
if (!knnQueryResult.Results.Any())
{
return(LocationSearchResults.ZeroResults());
}
// now load entities from database
var ids = knnQueryResult.Results.Select(i => i.Document.Id).ToArray();
var locations = _locationRepository.FindIn(ids);
// build return results by joining Location and Distance
var results = new List <LocationSearchResultItem>();
var locationsIndex = locations.ToDictionary(l => l.Id);
foreach (var item in knnQueryResult.Results)
{
if (locationsIndex.ContainsKey(item.Document.Id))
{
var location = locationsIndex[item.Document.Id];
results.Add(new LocationSearchResultItem(location, item.Distance));
}
}
return(LocationSearchResults.Success(results));
}