/// <summary>
/// Helper method that builds list of message envelopes from list of multipart data in binary form.
/// Returns list of Message Envelopes.
/// </summary>
private IList <IPacketMessageEnvelope> EnvelopePartsToEnvelope(PacketSerializer serializer, IList <byte[]> envelopeParts)
{
// Check that number of parts is even
if (envelopeParts.Count % 2 != 0)
{
throw new Exception("Incorrect number of envelope parts");
}
// One message envelope consists of two binary parts - metadata part and message part
var list = new List <IPacketMessageEnvelope>(envelopeParts.Count / 2);
// Build message envelope
for (int i = 0; i < envelopeParts.Count / 2; i++)
{
var envelope = new PacketMessageEnvelope(
serializer,
envelopeParts[i * 2 + 1],
envelopeParts[i * 2]);
list.Add(envelope);
}
// Prevent modifications of this list.
// If you want to modify packet's list of envelopes - create new packet.
return(list.AsReadOnly());
}
/// <summary>
/// Creates MessageEnvelope from message and metadata in binary form
/// </summary>
public PacketMessageEnvelope(PacketSerializer packetSerializer, byte[] message, byte[] metadata)
{
if (packetSerializer == null)
{
throw new ArgumentNullException("packetSerializer");
}
if (message == null)
{
throw new ArgumentNullException("message");
}
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
_serializer = packetSerializer;
_metadataBinary = metadata;
_messageBinary = message;
}
/// <summary>
/// Creates envelope with default and empty metadata
/// </summary>
public static IPacketMessageEnvelope CreateEnvelope(PacketSerializer serializer, IMessage message)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
IMessageMetadata metadata;
if (message is IEvent)
{
metadata = new EventMetadata();
}
else if (message is ICommand)
{
metadata = new CommandMetadata();
}
else
{
metadata = new MessageMetadata();
}
return(new PacketMessageEnvelope(serializer, message, metadata));
}
/// <summary>
/// Creates packet with specified header and list of message envelopes
/// </summary>
public Packet(PacketSerializer serializer, IPacketHeaders headers, IList <IPacketMessageEnvelope> envelopes)
{
_serializer = serializer;
_headers = headers;
_envelopes = envelopes;
}
/// <summary>
/// Creates packet from the list binary data (multipart message)
/// </summary>
public Packet(PacketSerializer serializer, IList <byte[]> parts)
{
_serializer = serializer;
_headersBinary = parts[0];
_envelopes = EnvelopePartsToEnvelope(serializer, parts.Skip(1).ToList());
}
/// <summary>
/// Boring code that enforce correct message and metadata pairs for events, commands and ordinary messages
/// </summary>
public static IPacketMessageEnvelope CreateEnvelope(PacketSerializer serializer, IMessage message, IMessageMetadata messageMetadata)
{
return(new PacketMessageEnvelope(serializer, message, messageMetadata));
}
public PacketBuilder(Func <Type, Guid> typeToTagResolver, PacketSerializer serializer)
{
_typeToTagResolver = typeToTagResolver;
_serializer = serializer;
}
