public override async ValueTask PutSliceAsync(Array sourceArray, int sliceLength, CancellationToken cancellationToken = default)
{
try
{
var sdl = GenerateSDL(Descriptor);
var slice = await EncodeSliceArrayAsync(sourceArray, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(IscCodes.op_put_slice, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(_transaction.Handle, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(ArrayHandle, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(sliceLength, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteBufferAsync(sdl, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(string.Empty, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(sliceLength, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteBytesAsync(slice, slice.Length, cancellationToken).ConfigureAwait(false);
await _database.Xdr.FlushAsync(cancellationToken).ConfigureAwait(false);
var response = (GenericResponse)await _database.ReadResponseAsync(cancellationToken).ConfigureAwait(false);
_handle = response.BlobId;
}
catch (IOException ex)
{
throw IscException.ForIOException(ex);
}
}
protected override async ValueTask GetSegmentAsync(Stream stream, CancellationToken cancellationToken = default)
{
var requested = SegmentSize;
try
{
await _database.Xdr.WriteAsync(IscCodes.op_get_segment, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(_blobHandle, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(requested < short.MaxValue - 12?requested : short.MaxValue - 12, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(DataSegment, cancellationToken).ConfigureAwait(false);
await _database.Xdr.FlushAsync(cancellationToken).ConfigureAwait(false);
var response = (GenericResponse)await _database.ReadResponseAsync(cancellationToken).ConfigureAwait(false);
RblRemoveValue(IscCodes.RBL_segment);
if (response.ObjectHandle == 1)
{
RblAddValue(IscCodes.RBL_segment);
}
else if (response.ObjectHandle == 2)
{
RblAddValue(IscCodes.RBL_eof_pending);
}
var buffer = response.Data;
if (buffer.Length == 0)
{
// previous segment was last, this has no data
return;
}
var len = 0;
var srcpos = 0;
while (srcpos < buffer.Length)
{
len = (int)IscHelper.VaxInteger(buffer, srcpos, 2);
srcpos += 2;
stream.Write(buffer, srcpos, len);
srcpos += len;
}
}
catch (IOException ex)
{
throw IscException.ForIOException(ex);
}
}
public override async ValueTask AttachAsync(ServiceParameterBufferBase spb, string dataSource, int port, string service, byte[] cryptKey, CancellationToken cancellationToken = default)
{
try
{
await SendAttachToBufferAsync(spb, service, cancellationToken).ConfigureAwait(false);
await _database.Xdr.FlushAsync(cancellationToken).ConfigureAwait(false);
await ProcessAttachResponseAsync((GenericResponse)await _database.ReadResponseAsync(cancellationToken).ConfigureAwait(false), cancellationToken).ConfigureAwait(false);
}
catch (IOException ex)
{
await _database.DetachAsync(cancellationToken).ConfigureAwait(false);
throw IscException.ForIOException(ex);
}
}
public override async ValueTask BeginTransactionAsync(TransactionParameterBuffer tpb, CancellationToken cancellationToken = default)
{
if (State != TransactionState.NoTransaction)
{
throw new InvalidOperationException();
}
try
{
await _database.Xdr.WriteAsync(IscCodes.op_transaction, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteAsync(_database.Handle, cancellationToken).ConfigureAwait(false);
await _database.Xdr.WriteBufferAsync(tpb.ToArray(), cancellationToken).ConfigureAwait(false);
await _database.Xdr.FlushAsync(cancellationToken).ConfigureAwait(false);
var response = (GenericResponse)await _database.ReadResponseAsync(cancellationToken).ConfigureAwait(false);
_database.TransactionCount++;
_handle = response.ObjectHandle;
State = TransactionState.Active;
}
catch (IOException ex)
{
throw IscException.ForIOException(ex);
}
}