public static void FromStream <TItemType>(Stream stream, DataHandler <TItemType> dataHandler,
ExceptionHandler exceptionHandler)
{
if (dataHandler == null)
{
throw new ArgumentNullException(nameof(dataHandler));
}
if (exceptionHandler == null)
{
throw new ArgumentNullException(nameof(exceptionHandler));
}
//BufferedStream bufferedStream = new BufferedStream(stream);
var reader = new BinaryReader(stream);
var items = reader.ReadInt32();
for (var i = 0; i < items; i++)
{
var useProtocolBuffers = reader.ReadBoolean();
var useCompression = reader.ReadBoolean();
reader.ReadDouble(); // the rank is not used in this case
var dataSize = reader.ReadInt32();
var data = reader.ReadBytes(dataSize);
using (var memStream = new MemoryStream(data))
{
try
{
var mode = SerializationMode.Json;
if (useProtocolBuffers)
{
mode = SerializationMode.ProtocolBuffers;
}
var deserializationFailure = false;
object result;
try
{
result = SerializationHelper.ObjectFromStream <TItemType>(memStream, mode, useCompression);
dataHandler((TItemType)result, i + 1, items);
}
catch (Exception)
{
deserializationFailure = true;
}
if (deserializationFailure)
{
memStream.Seek(0, SeekOrigin.Begin);
result = SerializationHelper.ObjectFromStream <ExceptionResponse>(memStream, mode,
useCompression);
if (result != null)
{
exceptionHandler((ExceptionResponse)result);
}
else
{
var message = $"Received an unknown item type while expecting {typeof(TItemType)}";
throw new StreamingException(message);
}
}
}
catch (IOException ex)
{
var exResponse = new ExceptionResponse(ex);
exceptionHandler(exResponse);
}
catch (SerializationException ex)
{
var exResponse = new ExceptionResponse(ex);
exceptionHandler(exResponse);
}
}
}
}
