public GeoDataBaseClientTests()
{
var db = new GeoDataBaseClient("./DataBase/geobase.dat");
db.Init();
_client = db;
_header = db.GetHeader();
}
public void Init(int parallelism)
{
using (FileStream stream = File.Open(_pathToFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
Span <byte> buffer = stackalloc byte[Marshal.SizeOf <GeoBaseHeader>()];
stream.Read(buffer);
Header = MemoryMarshal.Cast <byte, GeoBaseHeader>(buffer)[0];
}
LocationsDatPosSortByCity = new uint[Header.RecordsCount];
LocationsSortByCityDict = new Dictionary <uint, int>(LocationsDatPosSortByCity.Length);
Locations = new Location[Header.RecordsCount];
IPRanges = new IPRange[Header.RecordsCount];
var tasks = new Task[parallelism];
// load LocationsDatPosSortByCity first, because they give information about Locations collection sorting
for (int i = 0; i < parallelism; i++)
{
int iteration = i;
var loadIndexesTask = Task.Run(() => Load(
iteration,
parallelism,
Header.OffsetCities,
LocationsDatPosSortByCity,
GetIndex
));
tasks[i] = loadIndexesTask;
}
Task.WaitAll(tasks);
for (int i = 0; i < LocationsDatPosSortByCity.Length; i++)
{
LocationsSortByCityDict.Add(LocationsDatPosSortByCity[i], i);
}
// load rest data
tasks = new Task[parallelism * 2];
for (int i = 0; i < parallelism; i++)
{
int iteration = i;
var loadIpRangesTask = Task.Run(() => Load(
iteration,
parallelism,
Header.OffsetRanges,
IPRanges,
GetIndex
));
tasks[i * 2] = loadIpRangesTask;
var loadLocationsTask = Task.Run(() => Load(
iteration,
parallelism,
Header.OffsetLocations,
Locations,
GetLocationIndex
));
tasks[i * 2 + 1] = loadLocationsTask;
}
Task.WaitAll(tasks);
}
