// return true if there will be no more frames to copy (complete)
public static async Task <bool> CopyNextFrameAsync(Stream inputStream, Stream outputStream, string traceType)
{
try
{
var intSegment = new ArraySegment <byte>(new byte[sizeof(int)]);
var marker = await SerializationHelper.ReadIntAsync(intSegment, inputStream).ConfigureAwait(false);
if (marker == BeginFrameMarker)
{
// write the marker
await outputStream.WriteAsync(intSegment.Array, intSegment.Offset, intSegment.Count).ConfigureAwait(false);
// copy the bytes for this frame
await CopyListElementsFrameAsync(inputStream, outputStream, traceType).ConfigureAwait(false);
return(false);
}
else if (marker == EndFramesMarker)
{
// write the end marker, and the copy is complete
await outputStream.WriteAsync(intSegment.Array, intSegment.Offset, intSegment.Count).ConfigureAwait(false);
return(true);
}
else
{
var exc = new InvalidDataException(string.Format("CheckpointFileHelper.CopyNextFrameAsync => Marker : {0}", marker));
FabricEvents.Events.ReliableConcurrentQueue_ExceptionError(traceType, exc.ToString());
throw exc;
}
}
catch (Exception ex)
{
FabricEvents.Events.ReliableConcurrentQueue_CopyNextFrameError("ReliableConcurrentQueueCheckpointFile.CopyNextFrameAsync@", ex.ToString());
throw;
}
}
public static async Task <bool> WriteFrameAsync(ArraySegment <byte> frame, Stream stream, string traceType)
{
bool complete;
var marker = BitConverter.ToInt32(frame.Array, frame.Offset);
if (marker == BeginFrameMarker)
{
complete = false;
}
else if (marker == EndFramesMarker)
{
complete = true;
}
else
{
var exc = new InvalidDataException(string.Format("CheckpointFileHelper.WriteFrameAsync : marker = {0}", marker));
FabricEvents.Events.ReliableConcurrentQueue_ExceptionError(traceType, exc.ToString());
throw exc;
}
await stream.WriteAsync(frame.Array, frame.Offset, frame.Count).ConfigureAwait(false);
return(complete);
}
private static async Task CopyListElementsFrameAsync(Stream inputStream, Stream outputStream, string traceType)
{
var listElementsCountSegment = new ArraySegment <byte>(new byte[sizeof(int)]);
var listElementsBytesSegment = new ArraySegment <byte>(new byte[sizeof(int)]);
var crcSegment = new ArraySegment <byte>(new byte[sizeof(ulong)]);
var listElementsCount = await SerializationHelper.ReadIntAsync(listElementsCountSegment, inputStream).ConfigureAwait(false);
if (listElementsCount < 0)
{
var exc = new InvalidDataException(string.Format("CheckpointFileHelper.CopyListElementsFrameAsync : Unexpected listElementsCount: {0}", listElementsCount));
FabricEvents.Events.ReliableConcurrentQueue_ExceptionError(traceType, exc.ToString());
throw exc;
}
var listElementsBytes = await SerializationHelper.ReadIntAsync(listElementsBytesSegment, inputStream).ConfigureAwait(false);
if (listElementsBytes < 0)
{
var exc = new InvalidDataException(string.Format("CheckpointFileHelper.CopyListElementsFrameAsync : Unexpected listElementsBytes: {0}", listElementsBytes));
FabricEvents.Events.ReliableConcurrentQueue_ExceptionError(traceType, exc.ToString());
throw exc;
}
var listElementsSegment = new ArraySegment <byte>(new byte[listElementsBytes]);
await SerializationHelper.ReadBytesAsync(listElementsSegment, listElementsBytes, inputStream).ConfigureAwait(false);
await SerializationHelper.ReadBytesAsync(crcSegment, sizeof(ulong), inputStream).ConfigureAwait(false);
var readCRC = BitConverter.ToUInt64(crcSegment.Array, crcSegment.Offset);
var calcCrc = CRC64.ToCRC64(new[] { listElementsCountSegment, listElementsBytesSegment, listElementsSegment });
if (calcCrc != readCRC)
{
var exc = new InvalidDataException(string.Format("CheckpointFileHelper.CopyListElementsFrameAsync => CRC mismatch. Read: {0} Calculated: {1}", readCRC, calcCrc));
FabricEvents.Events.ReliableConcurrentQueue_ExceptionError(traceType, exc.ToString());
throw exc;
}
await outputStream.WriteAsync(listElementsCountSegment.Array, listElementsCountSegment.Offset, listElementsCountSegment.Count).ConfigureAwait(false);
await outputStream.WriteAsync(listElementsBytesSegment.Array, listElementsBytesSegment.Offset, listElementsBytesSegment.Count).ConfigureAwait(false);
await outputStream.WriteAsync(listElementsSegment.Array, listElementsSegment.Offset, listElementsSegment.Count).ConfigureAwait(false);
await outputStream.WriteAsync(crcSegment.Array, crcSegment.Offset, crcSegment.Count).ConfigureAwait(false);
}
