public byte[] SaveEnvelopeData(ImmutableEnvelope envelope)
{
// string contract, Guid messageId, Uri sender,
var itemContracts = new MessageContract[envelope.Items.Length];
using (var content = new MemoryStream())
{
int position = 0;
for (int i = 0; i < envelope.Items.Length; i++)
{
var item = envelope.Items[i];
string name;
if (!_dataSerializer.TryGetContractNameByType(item.MappedType, out name))
{
var error = string.Format("Failed to find contract name for {0}", item.MappedType);
throw new InvalidOperationException(error);
}
// normal serializers have a nasty habbit of closing the stream after they are done
// we can suppress that or use a wrapper now instead
using (var itemStream = new MemoryStream())
{
_dataSerializer.Serialize(item.Content, itemStream);
var bytes = itemStream.ToArray();
content.Write(bytes, 0, bytes.Length);
}
int size = (int)content.Position - position;
var attribContracts = EnvelopeConvert.ItemAttributesToContract(item.GetAllAttributes());
itemContracts[i] = new MessageContract(name, size, position, attribContracts);
position += size;
}
var envelopeAttribs = EnvelopeConvert.EnvelopeAttributesToContract(envelope.GetAllAttributes());
var contract = new EnvelopeContract(envelope.EnvelopeId, envelopeAttribs, itemContracts,
envelope.DeliverOnUtc, envelope.CreatedOnUtc);
using (var stream = new MemoryStream())
{
// skip header
stream.Seek(EnvelopeHeaderContract.FixedSize, SeekOrigin.Begin);
// save envelope attributes
_envelopeSerializer.SerializeEnvelope(stream, contract);
var envelopeBytes = stream.Position - EnvelopeHeaderContract.FixedSize;
// copy data
content.WriteTo(stream);
// write the header
stream.Seek(0, SeekOrigin.Begin);
var header = new EnvelopeHeaderContract(EnvelopeHeaderContract.Schema2DataFormat, envelopeBytes, 0);
header.WriteToStream(stream);
return(stream.ToArray());
}
}
}
public ImmutableEnvelope ReadAsEnvelopeData(byte[] buffer)
{
var header = EnvelopeHeaderContract.ReadHeader(buffer);
if (header.MessageFormatVersion != EnvelopeHeaderContract.Schema2DataFormat)
{
throw new InvalidOperationException("Unexpected message format");
}
EnvelopeContract envelope;
using (var stream = new MemoryStream(buffer, EnvelopeHeaderContract.FixedSize, (int)header.EnvelopeBytes))
{
envelope = _envelopeSerializer.DeserializeEnvelope(stream);
}
var items = new ImmutableMessage[envelope.Messages.Length];
for (var i = 0; i < items.Length; i++)
{
var itemContract = envelope.Messages[i];
var attributes = EnvelopeConvert.ItemAttributesFromContract(itemContract.Attributes);
Type contractType;
var itemPosition = EnvelopeHeaderContract.FixedSize + (int)header.EnvelopeBytes + (int)itemContract.ContentPosition;
var itemSize = (int)itemContract.ContentSize;
if (_dataSerializer.TryGetContractTypeByName(itemContract.ContractName, out contractType))
{
using (var stream = new MemoryStream(buffer, itemPosition, itemSize))
{
var instance = _dataSerializer.Deserialize(stream, contractType);
items[i] = new ImmutableMessage(contractType, instance, attributes, i);
}
}
else
{
// we can't deserialize. Keep it as buffer
var bufferInstance = new byte[itemContract.ContentSize];
Buffer.BlockCopy(buffer, itemPosition, bufferInstance, 0, itemSize);
items[i] = new ImmutableMessage(null, bufferInstance, attributes, i);
}
}
var envelopeAttributes = EnvelopeConvert.EnvelopeAttributesFromContract(envelope.EnvelopeAttributes);
return(new ImmutableEnvelope(envelope.EnvelopeId, envelopeAttributes, items, envelope.DeliverOnUtc, envelope.CreatedOnUtc));
}