public static void WriteMessage(Stream input, Message message)
{
var buffer = new BinaryWriter(input);
buffer.Write((byte)message.ProtocolVersion);
buffer.Write((byte)message.MessageType);
if (message.StatusCode > 0)
{
buffer.Write(MessageType.HeaderType.StatusCode);
buffer.Write(message.StatusCode);
}
if (message.StatusPhase != null && message.StatusPhase != "")
{
buffer.Write(MessageType.HeaderType.StatusPhrase);
WriteCountedString(buffer, message.StatusPhase);
}
if (message.Flag > 0)
{
buffer.Write(MessageType.HeaderType.Flag);
buffer.Write(message.Flag);
}
if (message.Token != null && message.Token != "")
{
buffer.Write(MessageType.HeaderType.Token);
WriteCountedString(buffer, message.Token);
}
if (message.Content != null)
{
foreach (var i in message.Content)
WriteCustomHeader(buffer, i.Key, i.Value);
}
buffer.Write(MessageType.HeaderType.EndOfHeaders);
}
public static Message ReadMessage(Stream input)
{
var buffer = new BinaryReader(input);
Message msg = new Message();
msg.ProtocolVersion = buffer.ReadByte();
msg.MessageType = buffer.ReadByte();
// read kv
IDictionary<string, object> dict = new Dictionary<string, object>();
short headerType = buffer.ReadInt16();
while (headerType != MessageType.HeaderType.EndOfHeaders)
{
if (headerType == MessageType.HeaderType.Custom)
dict.Add(ReadCountedString(buffer), ReadCustomValue(buffer));
else if (headerType == MessageType.HeaderType.StatusCode)
msg.StatusCode = buffer.ReadInt32();
else if (headerType == MessageType.HeaderType.StatusPhrase)
msg.StatusPhase = ReadCountedString(buffer);
else if (headerType == MessageType.HeaderType.Flag)
msg.Flag = buffer.ReadInt32();
else if (headerType == MessageType.HeaderType.Token)
msg.Token = ReadCountedString(buffer);
headerType = buffer.ReadInt16();
}
msg.Content = dict;
return msg;
}
private Message CreateMessage(IDictionary<string, object> message)
{
Message msg = new Message();
msg.MessageType = MessageType.SENDACK;
msg.Content = message;
msg.Flag = this._flag;
msg.Token = this._token;
return msg;
}
internal IDictionary<string, object> SendAndWait(EndpointProxy e
, IChannelSender sender
, Message message
, int timeout)
{
SendCallback callback = new SendCallback(e);
this.Send(message, sender, callback);
callback.WaitReturn(timeout);
if (callback.Error != null)
throw callback.Error;
return callback.Return;
}
public void Send(Message message, IChannelSender sender, SendCallback callback)
{
if (callback != null)
{
message.Flag = System.Threading.Interlocked.Increment(ref this._flag);
this._callbacks.Add(message.Flag, callback);
}
using (var s = new MemoryStream())
{
MessageIO.WriteMessage(s, message);
this.GetChannel(sender).Send(s.ToArray());
}
}
public EndpointProxy GetEndpoint(Identity target, string uri, IDictionary<string, object> extras)
{
EndpointProxy e = this.GetEndpoint(target) ?? this.CreateProxy();
e.Identity = target;
// always clear, cached proxy will have broken channel
e.Remove(uri);
// always reget channel, make sure it's valid
IClientChannel channel = this.ChannelSelector.GetChannel(new Uri(uri));
// connect message
Message msg = new Message();
msg.MessageType = MessageType.CONNECT;
IDictionary<string, object> content = new Dictionary<string, object>();
this.Identity.Render(content);
// pass extra data
if (extras != null)
foreach (var p in extras)
content.Add(p);
msg.Content = content;
this._handler.SendAndWait(e, channel, msg, TIMEOUT);
e.Add(channel);
return e;
}
public void Send(Message message, IChannelSender sender)
{
this.Send(message, sender, null);
}
private bool IsError(Message msg)
{
return msg.StatusCode > 0 || !string.IsNullOrEmpty(msg.StatusPhase);
}
private void HandleCallback(SendCallback callback, Message msg, Identity msgFrom)
{
if (!callback.Target.Identity.Equals(msgFrom))
{
this._log.WarnFormat(Text.E_IDENTITY_NOT_MATCH_WITH_CALLBACK, msgFrom, callback.Target.Identity);
return;
}
if (this.IsError(msg))
callback.Error = new LinkException(msg.StatusCode, msg.StatusPhase);
else
callback.Return = msg.Content;
}
private void HandleConnectAck(SendCallback callback, Message msg)
{
if (callback == null)
throw new LinkException(Text.E_NO_CALLBACK);
if (this.IsError(msg))
callback.Error = new LinkException(msg.StatusCode, msg.StatusPhase);
else
{
callback.Return = null;
// set token for proxy for sending message next time
callback.Target.Token = msg.Token;
// store token from target endpoint for receiving it's message
// next time
if (this._idByToken.ContainsKey(msg.Token))
this._idByToken[msg.Token] = callback.Target.Identity;
else
this._idByToken.Add(msg.Token, callback.Target.Identity);
this._log.InfoFormat(Text.E_CONNECT_SUCCESS, callback.Target.Identity, msg.Token);
}
}
