public DocumentServer(string hostName, int port, string directory, int bufferSize = 4096 * 12)
{
_version = Util.GetIndexVersionListInChronologicalOrder(directory)[0];
var dataFn = Path.Combine(directory, _version.Version + ".rdb");
_data = new FileStream(
dataFn,
FileMode.Open,
FileAccess.Read,
FileShare.ReadWrite,
bufferSize,
FileOptions.RandomAccess);
_reader = new StreamBlockReader(
_data, _version.KeyIndexOffset + _version.KeyIndexSize);
IPHostEntry ipHostInfo = Dns.GetHostEntryAsync(hostName).Result;
IPAddress ipAddress = ipHostInfo.AddressList[1];
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);
_listener = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
_listener.Bind(localEndPoint);
_listener.Listen(10);
_cache = new ConcurrentDictionary <long, byte[]>();
}