/// <summary>
/// Загрузка базы данных в память
/// </summary>
/// <returns></returns>
public void Load()
{
string filePath = Path.Combine(_environment.ContentRootPath, _dbFileName);
BinGeoModel binModel;
using (FileStream stream = new FileStream(filePath, FileMode.Open))
{
Stopwatch stopwatch = System.Diagnostics.Stopwatch.StartNew();
using (BufferedBinaryReader bufferedReader = new BufferedBinaryReader(stream, 65536))
{
stopwatch.Start();
bufferedReader.FillBuffer();
int version = bufferedReader.ReadInt32();
byte[] nameBytes = bufferedReader.Read(0, 32);
ulong timestamp = bufferedReader.ReadUInt64();
int records = bufferedReader.ReadInt32();
uint offsetRanges = bufferedReader.ReadUInt32();
uint offsetCities = bufferedReader.ReadUInt32();
uint offsetLocations = bufferedReader.ReadUInt32();
binModel = new BinGeoModel(version, nameBytes, timestamp, records, offsetRanges, offsetCities, offsetLocations);
int currentIndex = 0;
binModel.IpRangeCollection = new BinIpRange[binModel.RecordsCount];
while (bufferedReader.FillBuffer() && currentIndex < binModel.RecordsCount)
{
for (; currentIndex < binModel.RecordsCount && bufferedReader.NumBytesAvailable >= IpRangeBytesCount; currentIndex++)
{
binModel.IpRangeCollection[currentIndex] = new BinIpRange()
{
IpFrom = bufferedReader.ReadUInt32(),
IpTo = bufferedReader.ReadUInt32(),
LocationIndex = bufferedReader.ReadUInt32()
};
}
}
currentIndex = 0;
binModel.LocationCollection = new BinLocation[binModel.RecordsCount];
while (bufferedReader.FillBuffer() && currentIndex < binModel.RecordsCount)
{
for (; currentIndex < binModel.RecordsCount && bufferedReader.NumBytesAvailable >= LocationBytesCount; currentIndex++)
{
byte[] country = bufferedReader.Read(0, 8);
byte[] region = bufferedReader.Read(0, 12);
byte[] postal = bufferedReader.Read(0, 12);
byte[] city = bufferedReader.Read(0, 24);
byte[] organization = bufferedReader.Read(0, 32);
float latitude = bufferedReader.ReadSingle();
float longitude = bufferedReader.ReadSingle();
binModel.LocationCollection[currentIndex] = new BinLocation(country, region, postal, city, organization, latitude, longitude);
}
}
currentIndex = 0;
binModel.Indexes = new uint[binModel.RecordsCount];
while (bufferedReader.FillBuffer() && currentIndex < binModel.RecordsCount)
{
for (; currentIndex < binModel.RecordsCount && bufferedReader.NumBytesAvailable >= IndexBytesCount; currentIndex++)
{
binModel.Indexes[currentIndex] = bufferedReader.ReadUInt32();
}
}
stopwatch.Stop();
DatabaseLoadedTimeMs = stopwatch.ElapsedMilliseconds;
_logger.LogInformation($"Database loading time: {stopwatch.ElapsedMilliseconds} ms");
}
// Отображение объектов сущностей двоичной базы в объекты бизнес сущностей
GeoModel = _mapper.Map <GeoModel>(binModel);
}
}
